Array With Elements Not Equal to Average of Neighbors, 1969. Minimum Operations to Make the Array Alternating, 2171. Valid Sudoku Permutations Combinations N-Queens N N-Queens N19'. Longest Arithmetic Subsequence of Given Difference, 1227. Minimum Number of Moves to Make Palindrome, 2196. Find the City With the Smallest Number of Neighbors at a Threshold Distance, 1335. Count Unreachable Pairs of Nodes in an Undirected Graph, 2320. Maximum Product of the Length of Two Palindromic Subsequences, 2003. Find the Smallest Divisor Given a Threshold, 1284. You may assume that the given Sudoku puzzle will have a single unique solution. Intervals Between Identical Elements, 2124. Minimum Adjacent Swaps to Reach the Kth Smallest Number, 1851. Minimum Number of Steps to Make Two Strings Anagram II, 2190. Number Of Ways To Reconstruct A Tree, 1722. Maximum Number of Events That Can Be Attended II, 1752. Find Consecutive Integers from a Data Stream, 2529. VS "I don't like it raining.". Remove Duplicates from Sorted List II, 103. Longest Substring with At Least K Repeating Characters, 421. Maximum Cost of Trip With K Highways, 2249. Count Number of Distinct Integers After Reverse Operations, 2446. Primary Department for Each Employee, 1790. Replace Non-Coprime Numbers in Array, 2200. Maximum Distance Between a Pair of Values, 1857. Create Target Array in the Given Order, 1391. Frequency of the Most Frequent Element, 1839. Elements in Array After Removing and Replacing Elements, 2114. Check if Numbers Are Ascending in a Sentence, 2044. Reconstruct Original Digits from English, 424. Leetcode Solutions; Introduction 1. Longest Path With Different Adjacent Characters, 2249. Customers Who Bought Products A and B but Not C, 1403. Kth Smallest Element in a Sorted Matrix, 381. Sudoku Solver - LeetCode 37 - Python Alpha-Code 34 subscribers Subscribe 3 26 views 1 day ago Solution, explanation, and complexity analysis for LeetCode 37 in Python.. Earliest Possible Day of Full Bloom, 2138. Shortest Subarray to be Removed to Make Array Sorted, 1576. Minimum Amount of Time to Fill Cups, 2340. Convert Binary Search Tree to Sorted Doubly Linked List, 428. Largest Positive Integer That Exists With Its Negative, 2442. Minimized Maximum of Products Distributed to Any Store, 2068. Find the Index of the First Occurrence in a String, 30. Count Unique Characters of All Substrings of a Given String, 862. Smallest Subtree with all the Deepest Nodes, 873. Convert Sorted Array to Binary Search Tree, 109. Lowest Common Ancestor of a Binary Tree, 297. Number of Unequal Triplets in Array, 2476. Maximum Number of Groups Entering a Competition, 2359. Maximum Number of Groups Entering a Competition, 2359. Extract Kth Character From The Rope Tree, 2696. Numbers With Same Consecutive Differences, 971. Count Ways to Make Array With Product, 1736. Divide Array in Sets of K Consecutive Numbers, 1297. Find the Index of the Large Integer, 1536. From. Removing Minimum Number of Magic Beans, 2176. Maximum Product Difference Between Two Pairs, 1916. Split Array into Consecutive Subsequences, 668. Sort Items by Groups Respecting Dependencies, 1209. Algorithm The algorithm for solving Sudoku is similar to other problems like Permutations, Combinations, and N-Queens. Longest ZigZag Path in a Binary Tree, 1374. Construct Binary Tree from Preorder and Inorder Traversal, 106. Determine Color of a Chessboard Square, 1815. The Number of Weak Characters in the Game, 1997. Verify Preorder Serialization of a Binary Tree, 378. Find Positive Integer Solution for a Given Equation, 1238. Closest Nodes Queries in a Binary Search Tree, 2477. Subarray With Elements Greater Than Varying Threshold, 2335. Number of Ways to Buy Pens and Pencils, 2244. Find the Most Competitive Subsequence, 1674. Find Target Indices After Sorting Array, 2091. Binary Tree Vertical Order Traversal, 317. Minimum Score by Changing Two Elements, 2570. Minimum Operations to Make the Array K-Increasing, 2114. Random Point in Non-overlapping Rectangles, 524. Partition Array into Disjoint Intervals, 921. 37. Minimum Increment to Make Array Unique, 947. 3.Longest Substring Without Repeating Characters. Minimum Moves to Reach Target with Rotations, 1217. Decrypt String from Alphabet to Integer Mapping, 1312. Find the Start and End Number of Continuous Ranges, 1287. Partition Array According to Given Pivot, 2163. Longest Substring Without Repeating Characters, 17. Convert Sorted Array to Binary Search Tree, 109. Second Minimum Time to Reach Destination, 2046. Rearrange Characters to Make Target String, 2290. Vertical Order Traversal of a Binary Tree, 990. Circular Permutation in Binary Representation, 1239. Minimum Difficulty of a Job Schedule, 1339. All Elements in Two Binary Search Trees, 1309. Find a Corresponding Node of a Binary Tree in a Clone of That Tree, 1381. Minimum Add to Make Parentheses Valid, 945. Reduction Operations to Make the Array Elements Equal, 1888. Minimum Swaps to Make Strings Equal, 1249. Largest Number After Mutating Substring, 1950. Find Total Time Spent by Each Employee, 1743. Encode String with Shortest Length (Hard), 501. Find Target Indices After Sorting Array, 2091. Remove Stones to Minimize the Total, 1963. Merge Triplets to Form Target Triplet, 1900. Guess the Majority in a Hidden Array, 1541. Maximum Number of Occurrences of a Substring, 1298. Add Two Numbers . Unique Length-3 Palindromic Subsequences, 1931. Number of Ways to Build House of Cards, 2190. The First Day of the Maximum Recorded Degree in Each City, 2316. Minimum Operations to Convert Number, 2060. Count Words Obtained After Adding a Letter, 2136. Minimize the Total Price of the Trips, 2654. Minimum Rounds to Complete All Tasks, 2245. Make Two Arrays Equal by Reversing Subarrays, 1461. Painting a Grid With Three Different Colors, 1935. Count Ways to Make Array With Product, 1736. Minimum Degree of a Connected Trio in a Graph, 1764. Number of Valid Words in a Sentence, 2048. Minimum Changes To Make Alternating Binary String, 1759. Topic 9 - Minimum Spanning Tree and Shortest Path, 3. Choose Edges to Maximize Score in a Tree, 2379. A sudoku puzzle Find First and Last Position of Element in Sorted Array, 80. Maximum Score From Removing Substrings, 1718. Number of Ways to Stay in the Same Place After Some Steps, 1270. You may assume that there will be only one unique solution. This avoids having to write a constructor in your case, and for more complex structs and classes with multiple constructors, it avoids having to repeat the member initializer list for each constructor. Maximum Size Subarray Sum Equals k (Medium), 329. Sudoku Solver Leetcode Hash Table Backtracking Write a program to solve a Sudoku puzzle by filling the empty cells. Write a program to solve a Sudoku puzzle by filling the empty cells. Smallest K-Length Subsequence With Occurrences of a Letter, 2033. Number of Pairs of Interchangeable Rectangles, 2002. Mean of Array After Removing Some Elements, 1620. Minimum Flips in Binary Tree to Get Result, 2314. Second Minimum Node In a Binary Tree, 873. Determine if String Halves Are Alike, 1707. Check if Binary String Has at Most One Segment of Ones, 1785. Number of Valid Words in a Sentence, 2048. Find the Student that Will Replace the Chalk, 1896. Maximum Number of Books You Can Take, 2356. Sudoku Solver. Max Dot Product of Two Subsequences, 1460. Maximum Number of Words Found in Sentences, 2115. Find the Distance Value Between Two Arrays, 1389. Users That Actively Request Confirmation Messages, 1940. Longest Word in Dictionary through Deleting (Medium), 530. Binary Tree Preorder Traversal (Medium), 145. The Category of Each Member in the Store, 2052. Maximum Score Words Formed by Letters, 1261. Maximum Number of Events That Can Be Attended, 1354. Construct Binary Search Tree from Preorder Traversal, 1010. Removing Minimum and Maximum From Array, 2095. Empty cells are indicated by the character'.'. Number of Unequal Triplets in Array, 2476. Design a Stack With Increment Operation, 1385. Tiling a Rectangle with the Fewest Squares, 1247. Minimum One Bit Operations to Make Integers Zero, 1614. Queries on Number of Points Inside a Circle, 1830. Special Array With X Elements Greater Than or Equal X, 1611. Check if All A's Appears Before All B's, 2127. Longest Substring with At Most K Distinct Characters, 363. Minimum Number of Operations to Move All Balls to Each Box, 1770. Count Numbers with Unique Digits (Medium), 358. Number of Sub-arrays of Size K and Average Greater than or Equal to Threshold, 1347. * Each of the digits 1-9 must occur exactly once in each column. Number Of Rectangles That Can Form The Largest Square, 1727. Best Time to Buy and Sell Stock with Cooldown, 314. K-th Smallest in Lexicographical Order, 448. 37. Employees Earning More Than Their Managers, 211. Minimum Deletions to Make String Balanced, 1658. Count Number of Rectangles Containing Each Point, 2259. Minimum Additions to Make Valid String, 2646. Maximum Alternating Subsequence Sum, 1913. Flip Columns For Maximum Number of Equal Rows, 1074. Serialize and Deserialize Binary Tree (Hard), 298. Letter Combinations of a Phone Number (Medium), 30. Find Resultant Array After Removing Anagrams, 2274. Find the Quiet Students in All Exams, 1413. Minimum Moves to Equal Array Elements II, 467. Shortest Distance to Target String in a Circular Array, 2516. Find Valid Matrix Given Row and Column Sums, 1606. Minimum Bit Flips to Convert Number, 2224. Number of Ways to Reach a Position After Exactly k Steps, 2406. Minimum Number of Work Sessions to Finish the Tasks, 1989. Minimum Bit Flips to Convert Number, 2224. Remove Colored Pieces if Both Neighbors are the Same Color, 2039. Partition Array Into Two Arrays to Minimize Sum Difference, 2037. 8 hours. Can you solve this real interview question? Count Subtrees With Max Distance Between Cities, 1619. Longest Substring Without Repeating Characters 4. Count Number of Homogenous Substrings, 1761. Reverse Nodes in Even Length Groups, 2077. Construct the Lexicographically Largest Valid Sequence, 1719. Also, there are now users of struct cell that also assume 0 is special. Longest Word in Dictionary through Deleting, 558. Number of Visible People in a Queue, 1945. Number of Increasing Paths in a Grid, 2334. Number Of Rectangles That Can Form The Largest Square, 1727. Triples with Bitwise AND Equal To Zero, 987. Number of Ways to Reach a Position After Exactly k Steps, 2406. Implement Trie (Prefix Tree) (Medium), 211. Minimum Swaps to Make Strings Equal, 1249. Minimum Operations to Make Numbers Non-positive, 2710. Find Numbers with Even Number of Digits, 1296. Count Common Words With One Occurrence, 2086. Longest Palindromic Substring (Medium), 17. Find Kth Largest XOR Coordinate Value, 1741. Check if All the Integers in a Range Are Covered, 1894. Number of Subarrays with Bounded Maximum, 798. Largest Submatrix With Rearrangements, 1735. Logical OR of Two Binary Grids Represented as Quad-Trees, 581. Combination Sum II 41. However, in case of an error you just call return, which doesn't really signal an error to the caller. Check if There is a Path With Equal Number of 0's And 1's, 2511. Count Ways to Build Rooms in an Ant Colony, 1921. Convert Sorted List to Binary Search Tree, 116. Longest Substring with At Most Two Distinct Characters (Hard), 166. Pairs of Songs With Total Durations Divisible by 60, 1011. Lowest Common Ancestor of a Binary Search Tree, 236. Shortest Path in a Grid with Obstacles Elimination, 1295. Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts, 1466. Lexicographically Smallest Palindrome, 2698. Frequency of the Most Frequent Element, 1839. 1746. The Most Frequently Ordered Products for Each Customer, 1597. LeetCode; Introduction String 6 ZigZag Conversion 30 Substring with Concatenation of All Words 38 Count and Say 76 Minimum Window Substring . Number of Ways to Rearrange Sticks With K Sticks Visible, 1867. Check Whether Two Strings are Almost Equivalent, 2071. Can You Eat Your Favorite Candy on Your Favorite Day? Maximum XOR With an Element From Array, 1712. Check If Array Pairs Are Divisible by k, 1498. Maximum Number of Accepted Invitations, 1821. How Many Numbers Are Smaller Than the Current Number, 1368. Replace All ? Number of Segments in a String (Easy), 448. Longest ZigZag Path in a Binary Tree, 1374. Evaluate Reverse Polish Notation (Medium), 157. Minimum Difficulty of a Job Schedule, 1339. Ways to Split Array Into Three Subarrays, 1713. Count Number of Pairs With Absolute Difference K, 2007. Minimum Number of Taps to Open to Water a Garden, 1327. Smallest Rotation with Highest Score, 801. Number of Connected Components in an Undirected Graph, 331. Change Minimum Characters to Satisfy One of Three Conditions, 1738. Replace All ? Two attempts of an if with an "and" are failing: if [ ] -a [ ] , if [[ && ]] Why? Splitting a String Into Descending Consecutive Values, 1850. Smallest String With A Given Numeric Value, 1665. Add and Search Word - Data structure design, 235. Difference Between Maximum and Minimum Price Sum, 2539. Maximum Number of Removable Characters, 1899. Number of Subarrays With LCM Equal to K, 2471. Check if String Is Decomposable Into Value-Equal Substrings, 1935. Special Array With X Elements Greater Than or Equal X, 1611. Minimum Operations to Reduce an Integer to 0, 2572. 37. Largest Number After Digit Swaps by Parity, 2232. Populating Next Right Pointers in Each Node II, 153. Minimum Adjacent Swaps for K Consecutive Ones, 1704. Number of Dice Rolls With Target Sum, 1156. Maximum Number of Darts Inside of a Circular Dartboard, 1455. Restore the Array From Adjacent Pairs. Maximum Number of Ways to Partition an Array, 2030. Create Binary Tree From Descriptions, 2197. If j is greater than or equal to 9, the current line is filled, and the function switches to the next line. Find Minimum in Rotated Sorted Array, 154. Check if Word Can Be Placed In Crossword, 2019. * * * Example 1: Check If a String Can Break Another String, 1434. MathJax reference. Minimum Money Required Before Transactions, 2414. User Activity for the Past 30 Days I, 1144. Remove Duplicates from Sorted List II, 103. Maximum Total Beauty of the Gardens, 2240. Minimum Operations to Make the Array Alternating, 2171. Maximum XOR of Two Numbers in an Array, 423. Find Minimum Time to Finish All Jobs, 1724. Smallest Subarrays With Maximum Bitwise OR, 2412. Count Nodes Equal to Average of Subtree, 2267. Moving Average from Data Stream (Easy), 357. Sudoku Solver 38. Maximum Profit of Operating a Centennial Wheel, 1601. Best Time to Buy and Sell Stock with Cooldown, 331. Smallest Range Covering Elements from K Lists, 659. Minimum Adjacent Swaps for K Consecutive Ones, 1704. Find Score of an Array After Marking All Elements, 2598. Best Time to Buy and Sell Stock IV (Hard), 208. Make Number of Distinct Characters Equal, 2535. Final Prices With a Special Discount in a Shop, 1477. Find the Longest Substring Containing Vowels in Even Counts, 1372. Smallest Subsequence of Distinct Characters, 1104. Time Needed to Rearrange a Binary String, 2383. Write a program to solve a Sudoku puzzle by filling the empty cells. Populating Next Right Pointers in Each Node II, 153. Redistribute Characters to Make All Strings Equal, 1898. Maximum Value of a String in an Array, 2499. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Path In Zigzag Labelled Binary Tree, 1111. Maximum XOR of Two Numbers in an Array (Medium), 423. Partition Array According to Given Pivot, 2163. Non-negative Integers without Consecutive Ones, 632. Minimum Cost Homecoming of a Robot in a Grid, 2089. Each of the the digits 1-9 must occur exactly once in each of the 9 3x3 sub-boxes of the grid. Minimum Number of Arrows to Burst Balloons, 453. Running Total for Different Genders, 1309. and its solution numbers marked in red. Sum of Nodes with Even-Valued Grandparent, 1317. Number of Ways to Divide a Long Corridor, 2148. link: https://leetcode.com/problems/sudoku-solver/discuss/15752/Straight-Forward-Java-Solution-Using-Backtracking, // Block no. Minimum Remove to Make Valid Parentheses, 1255. Count Different Palindromic Subsequences, 744. Minimum Cost to Move Chips to The Same Position, 1218. In Europe, do trains/buses get transported by ferries with the passengers inside? First and Last Call On the Same Day, 1973. Minimum Replacements to Sort the Array, 2369. Orders With Maximum Quantity Above Average, 1868. K Highest Ranked Items Within a Price Range, 2147. How Many Numbers Are Smaller Than the Current Number, 1368. Convert Binary Number in a Linked List to Integer, 1292. Kth Smallest Number in Multiplication Table, 671. Find Smallest Common Element in All Rows, 1203. Maximum Consecutive Floors Without Special Floors, 2275. Find Numbers with Even Number of Digits, 1296. Maximum Non Negative Product in a Matrix, 1595. Minimum Number of Steps to Make Two Strings Anagram II, 2189. Number of Substrings With Fixed Ratio, 2491. Queries on Number of Points Inside a Circle, 1830. They are for personal study and research only, and should not be used for commercial purposes. The best answers are voted up and rise to the top, Not the answer you're looking for? Detect Pattern of Length M Repeated K or More Times, 1567. Binary Tree Vertical Order Traversal (Medium), 317. Maximum Number of Non-Overlapping Subarrays With Sum Equals Target, 1549. The Number of Seniors and Juniors to Join the Company, 2005. Construct Binary Tree from Inorder and Postorder Traversal, 107. Find the Kth Smallest Sum of a Matrix With Sorted Rows, 1441. Satisfiability of Equality Equations, 995. Closest Binary Search Tree Value II (Hard), 297. Probability of a Two Boxes Having The Same Number of Distinct Balls, 1475. Solution 1: Partition Array Such That Maximum Difference Is K, 2300. Find Original Array From Doubled Array, 2009. Minimum Length of String After Deleting Similar Ends, 1751. Maximize the Topmost Element After K Moves, 2203. Number of Subarrays With GCD Equal to K, 2449. Minimum Cost to Connect Two Groups of Points, 1599. Count Lattice Points Inside a Circle, 2250. 1749. Count Ways to Group Overlapping Ranges, 2581. Partition Array Into Two Arrays to Minimize Sum Difference, 2037. Construct Binary Tree from Preorder and Inorder Traversal, 107. Write a program to solve a Sudoku puzzle by filling the empty cells. The k-th Lexicographical String of All Happy Strings of Length n, 1418. Find All K-Distant Indices in an Array, 2201. Number of Longest Increasing Subsequence, 674. The Earliest Moment When Everyone Become Friends, 1104. Maximum Frequency Score of a Subarray, 2525. Maximum Points You Can Obtain from Cards, 1431. Number of Ways to Arrive at Destination, 1979. Find First Palindromic String in the Array, 2110. Design Graph With Shortest Path Calculator, 2644. Populating Next Right Pointers in Each Node, 117. A sudoku solution must satisfy all of the following rules: Each of the digits 1-9 must occur exactly once in each row. A sudoku solution must satisfy all of the following rules: Do not return anything, modify board in-place instead. Minimum Cost to Reach City With Discounts, 2095. Minimum Number of Days to Make m Bouquets, 1485. Maximum Number of Words You Can Type, 1939. This will then get rid of some peculiarities with constraints, where the least significant bit is unused. The algorithm for solving Sudoku is similar to other problems like Permutations, Combinations, and N-Queens. In that case, the above won't work anymore. Successful Pairs of Spells and Potions, 2302. Minimum Moves to Make Array Complementary, 1680. Number of Substrings Containing All Three Characters, 1359. 1744. Largest Number At Least Twice of Others, 762. Minimum Number of Flips to Make the Binary String Alternating, 1889. Maximum Product Difference Between Two Pairs, 1916. Replace the Substring for Balanced String, 1237. Amount of New Area Painted Each Day, 2160. Insufficient Nodes in Root to Leaf Paths, 1081. Number of Subsequences That Satisfy the Given Sum Condition, 1502. Count Pairs of Equal Substrings With Minimum Difference, 1798. Naming things is always hard. Minimum Cost to Change the Final Value of Expression, 1897. Make Array Non-decreasing or Non-increasing, 2264. Insert Delete GetRandom O(1) - Duplicates allowed. Pour Water Between Buckets to Make Water Levels Equal, 2138. Traffic Light Controlled Intersection, 1281. Convert Sorted List to Binary Search Tree, 116. Two Sum 2. Minimum Number of Days to Disconnect Island, 1569. Capacity To Ship Packages Within D Days, 1013. Max Dot Product of Two Subsequences, 1460. Construct Target Array With Multiple Sums, 1356. Maximum Sum of Two Non-Overlapping Subarrays, 1038. Longest Binary Subsequence Less Than or Equal to K, 2316. Is there a place where adultery is a crime? A sudoku solution must satisfy all of the following rules: Each of the digits 1-9 must occur exactly once in each row. Longest Repeating Character Replacement, 430. Final Prices With a Special Discount in a Shop, 1477. Categorize Box According to Criteria, 2526. Count Collisions of Monkeys on a Polygon, 2554. Instead, I would throw a std::invalid_argument exception. Count the Number of Consistent Strings, 1685. Maximum Good People Based on Statements, 2154. Coordinate With Maximum Network Quality, 1621. Though all my solutions can be found at leetcode column. Formatted question description: https://leetcode.ca/all/37.html. Find The Original Array of Prefix Xor, 2434. Number of Sub-arrays of Size K and Average Greater than or Equal to Threshold, 1347. Minimum Number of Flips to Convert Binary Matrix to Zero Matrix, 1287. Reverse Nodes in Even Length Groups, 2078. Count Unique Characters of All Substrings of a Given String, 862. Sum of Digits of String After Convert, 1946. Remove All Ones With Row and Column Flips, 2131. Insert into a Sorted Circular Linked List, 712. Merge Triplets to Form Target Triplet, 1900. Kth Smallest Element in a Sorted Matrix (Medium), 387. Longest Subarray With Maximum Bitwise AND, 2423. Find the Index of the First Occurrence in a String, 30. Make Array Zero by Subtracting Equal Amounts, 2358. Best Time to Buy and Sell Stock II (Easy), 123. Minimum Obstacle Removal to Reach Corner, 2292. Shortest Impossible Sequence of Rolls, 2355. Number of Nodes in the Sub-Tree With the Same Label, 1520. Count the Number of Complete Components, 2689. Number of Different Integers in a String, 1806. 's to Avoid Consecutive Repeating Characters, 1577. Divide Nodes Into the Maximum Number of Groups, 2496. Empty cells are indicated by the character '.'. All People Report to the Given Manager, 1276. Write a program to solve a Sudoku puzzle by filling the empty cells. Number of Sets of K Non-Overlapping Line Segments, 1623. Each of the the digits 1-9 must occur exactly once in each of the 9 3x3 sub-boxes of the grid. By clicking Post Your Answer, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. Write a program to solve a Sudoku puzzle by filling the empty cells. Flatten a Multilevel Doubly Linked List, 671. Longest Line of Consecutive One in Matrix, 570. Binary Tree Level Order Traversal II, 108. Count Number of Maximum Bitwise-OR Subsets, 2045. Check if Every Row and Column Contains All Numbers, 2134. Removing Minimum Number of Magic Beans, 2174. Insufficient Nodes in Root to Leaf Paths, 1081. Number of Valid Words for Each Puzzle, 1180. Maximum Length of a Concatenated String with Unique Characters, 1240. Find the Kth Smallest Sum of a Matrix With Sorted Rows, 1441. Check If All 1's Are at Least Length K Places Away, 1438. Minimum Number of Days to Disconnect Island, 1569. Largest Rectangle in Histogram (Hard), 103. Number of Valid Move Combinations On Chessboard, 2058. Backtracking | O (T): O () | O (S): O () | Rt: 808ms | Check if There is a Valid Partition For The Array, 2372. Minimum Amount of Time to Collect Garbage, 2393. Partition Array into Disjoint Intervals, 921. Minimize Max Distance to Gas Station, 793. Maximum Split of Positive Even Integers, 2184. Minimum Number of Buckets Required to Collect Rainwater from Houses, 2087. Maximum Side Length of a Square with Sum Less than or Equal to Threshold, 1293. Two Furthest Houses With Different Colors, 2083. Split Array into Consecutive Subsequences, 668. Maximum Number of Tasks You Can Assign, 2074. Preimage Size of Factorial Zeroes Function, 795. A sudoku solution must satisfy all of the following rules: Each of the digits 1-9 must occur exactly once in each row. Count Number of Pairs With Absolute Difference K, 2007. Distinct Prime Factors of Product of Array, 2522. You may assume that there will be only one unique solution. Maximum Number of Vowels in a Substring of Given Length, 1457. Count Number of Homogenous Substrings, 1761. Private group. Check if All Characters Have Equal Number of Occurrences, 1942. Largest Component Size by Common Factor, 967. Partition Array Such That Maximum Difference Is K, 2300. Empty cells are indicated by the character '.'. Check if Number Has Equal Digit Count and Digit Value, 2287. Maximum Fruits Harvested After at Most K Steps, 2108. Can Make Arithmetic Progression From Sequence, 1503. Minimum Swaps to Group All 1's Together II, 2135. Smallest K-Length Subsequence With Occurrences of a Letter, 2031. Number of Trusted Contacts of a Customer, 1365. Number of Connected Components in an Undirected Graph, 331. Maximum Number of Words Found in Sentences, 2115. Eliminate Maximum Number of Monsters, 1928. Each of the digits 1-9 must occur exactly once in each column. Remove All Occurrences of a Substring, 1911. Minimum Score of a Path Between Two Cities, 2493. Largest Substring Between Two Equal Characters, 1625. Smallest Subtree with all the Deepest Nodes, 873. Last Substring in Lexicographical Order, 1170. Check if Array Is Sorted and Rotated, 1758. Why is it "Gaudeamus igitur, *iuvenes dum* sumus!" Subsequence of Size K With the Largest Even Sum, 2099. Subtract the Product and Sum of Digits of an Integer, 1282. Each of the digits 1-9 must occur exactly once in each column. Count the Number of Consistent Strings, 1685. Remove Duplicates from Sorted Array II, 82. Minimum Number of Moves to Seat Everyone, 2038. A sudoku solution must satisfy all of the following rules: Each of the digits 1-9 must occur exactly once in each row. Substring with Concatenation of All Words, 80. Make the XOR of All Segments Equal to Zero, 1790. Range Sum Query 2D - Immutable (Medium), 309. Maximum Side Length of a Square with Sum Less than or Equal to Threshold, 1293. Check if Word Can Be Placed In Crossword, 2019. Divide Players Into Teams of Equal Skill, 2492. Intervals Between Identical Elements, 2123. Minimum Value to Get Positive Step by Step Sum, 1414. Minimum Number of Vertices to Reach All Nodes, 1558. Build Array Where You Can Find The Maximum Exactly K Comparisons, 1422. ",7,9]] Output: [[5,3,4,6,7,8,9,1,2],[6,7,2,1,9,5,3,4,8],[1,9,8,3,4,2,5,6,7],[8,5,9,7,6,1,4,2,3],[4,2,6,8,5,3,7,9,1],[7,1,3,9,2,4,8,5,6],[9,6,1,5,3,7,2,8,4],[2,8,7,4,1,9,6,3,5],[3,4,5,2,8,6,1,7,9]] Explanation: The input board is shown above and the only valid solution is shown below: Do not return anything, modify board in-place instead. Largest Combination With Bitwise AND Greater Than Zero, 2279. Best Time to Buy and Sell Stock with Transaction Fee, 730. Number of Subarrays With LCM Equal to K, 2471. The Number of the Smallest Unoccupied Chair, 1944. Reverse Subarray To Maximize Array Value, 1333. Minimum Number of Flips to Convert Binary Matrix to Zero Matrix, 1285. Form Array by Concatenating Subarrays of Another Array, 1767. Sort Items by Groups Respecting Dependencies, 1209. If the current position needs a number, try filling in all the numbers from 1 to 9 and let c traverse from 1 to 9. Find Total Time Spent by Each Employee, 1743. Maximum Nesting Depth of Two Valid Parentheses Strings, 1123. Longest Increasing Path in a Matrix (Hard), 331. Smallest Value After Replacing With Sum of Prime Factors, 2508. Number of Ways to Buy Pens and Pencils, 2244. The Number of the Smallest Unoccupied Chair, 1944. Maximum Value of K Coins From Piles, 2220. Maximum Number of Integers to Choose From a Range I, 2556. Finding the Number of Visible Mountains, 2350. Max Difference You Can Get From Changing an Integer, 1433. Minimum Number of Moves to Seat Everyone, 2038. Find Players With Zero or One Losses, 2226. Make Two Arrays Equal by Reversing Subarrays, 1461. Prime Number of Set Bits in Binary Representation, 774. Check If String Is a Prefix of Array, 1962. Find Greatest Common Divisor of Array, 1981. Populating Next Right Pointers in Each Node, 117. Time Needed to Inform All Employees, 1379. A sudoku solution must satisfy all of the following rules: Empty cells are indicated by the character '.'. Average Salary: Departments VS Company, 632. Keep Multiplying Found Values by Two, 2155. Maximum Number of Occurrences of a Substring, 1298. Number of Steps to Reduce a Number in Binary Representation to One, 1413. Merge Two 2D Arrays by Summing Values, 2571. Construct Binary Tree from Preorder and Inorder Traversal, 106. Minimum Addition to Make Integer Beautiful, 2458. Largest Submatrix With Rearrangements, 1731. Remove One Element to Make the Array Strictly Increasing, 1910. Kth Smallest Element in a Sorted Matrix, 426. 2. Minimum Number of Removals to Make Mountain Array, 1673. All Ancestors of a Node in a Directed Acyclic Graph, 2193. Minimum Number of K Consecutive Bit Flips, 1003. Append Characters to String to Make Subsequence, 2491. Count Substrings with Only One Distinct Letter, 1186. Learn more about Stack Overflow the company, and our products. Minimum Sum of Four Digit Number After Splitting Digits, 2161. First Completely Painted Row or Column, 2662. Find Subsequence of Length K With the Largest Sum, 2106. Minimum White Tiles After Covering With Carpets, 2210. Remove Letter To Equalize Frequency, 2426. Maximum Number of Consecutive Values You Can Make, 1802. Maximum Number of Weeks for Which You Can Work, 1954. The principle of checking whether the current array is valid is similar to Valid Sudoku. Write a program to solve a Sudoku puzzle by filling the empty cells. Binary String With Substrings Representing 1 To N, 1026. Length of Longest Fibonacci Subsequence, Free text and natural language processing. Count Total Number of Colored Cells, 2580. Groups of Special-Equivalent Strings, 915. Find the Minimum and Maximum Number of Nodes Between Critical Points, 2059. Mean of Array After Removing Some Elements, 1620. Find Elements in a Contaminated Binary Tree, 1263. Populating Next Right Pointers in Each Node II (Medium), 122. Number of Ways Where Square of Number Is Equal to Product of Two Numbers, 1579. Longest Chunked Palindrome Decomposition, 1150. Maximum Sum of 3 Non-Overlapping Subarrays, 702. Cartagena: Private Islands Boat Excursion with Snorkeling. Minimum Space Wasted From Packaging, 1893. Number of Operations to Make Network Connected, 1320. Customer Placing the Largest Number of Orders, 600. Maximum Profit of Operating a Centennial Wheel, 1601. Maximum Product of Two Elements in an Array, 1465. Display Table of Food Orders in a Restaurant, 1420. People Whose List of Favorite Companies Is Not a Subset of Another List, 1453. Check If String Is Transformable With Substring Sort Operations, 1589. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. LeetCode problem number: 37Problem: Sudoku SolverDifficulty Level: HardLink: https://leetcode.com/problems/sudoku-solver/C# source code: https://github.com/h. Generate a String With Characters That Have Odd Counts, 1375. Minimum Absolute Difference in BST (Easy), 536. Fraction to Recurring Decimal (Medium), 167. Number of Distinct Substrings in a String, 1699. Flip Binary Tree To Match Preorder Traversal, 982. Unique Orders and Customers Per Month, 1566. Maximum White Tiles Covered by a Carpet, 2273. Find Three Consecutive Integers That Sum to a Given Number, 2178. Number of Ways to Rearrange Sticks With K Sticks Visible, 1869. Count Ways to Build Rooms in an Ant Colony, 1921. Friendly Movies Streamed Last Month, 1497. Find Consecutive Integers from a Data Stream, 2529. Minimum Increment to Make Array Unique, 947. Best Time to Buy and Sell Stock with Cooldown, 311. Find Words That Can Be Formed by Characters, 1163. Kth Smallest Element in a BST (Medium), 241. Longest Subarray With Maximum Bitwise AND, 2422. Eliminate Maximum Number of Monsters, 1928. Find the Minimum and Maximum Number of Nodes Between Critical Points, 2059. Checking Existence of Edge Length Limited Paths, 1700. Lowest Common Ancestor of a Binary Tree, 255. Number of Pairs of Interchangeable Rectangles, 2002. Sparse Matrix Multiplication (Medium), 314. 3. Non-negative Integers without Consecutive Ones, 602. Check If Word Is Valid After Substitutions, 1005. Special Positions in a Binary Matrix, 1585. Minimum Number of Steps to Make Two Strings Anagram, 1351. K-th Smallest in Lexicographical Order, 448. Convert Binary Search Tree to Sorted Doubly Linked List, 430. Can Make Arithmetic Progression From Sequence, 1503. Minimum Distance to the Target Element, 1849. Construct Target Array With Multiple Sums, 1356. Most Frequent Number Following Key In an Array, 2192. Write a program to solve a Sudoku puzzle by filling the empty cells. Sudoku Solver (Hard) Write a program to solve a Sudoku puzzle by filling the empty cells. Find All Lonely Numbers in the Array, 2151. Kth Largest Element in an Array (Medium), 230. Last Moment Before All Ants Fall Out of a Plank, 1505. Construct Binary Tree from Preorder and Postorder Traversal, 893. Sudoku Solver - LeetCode Solutions Preface Style Guide Problems Problems 1. Determine if String Halves Are Alike, 1707. Check if One String Swap Can Make Strings Equal, 1798. Minimum Time For K Virus Variants to Spread, 1957. Binary Search Tree Iterator Medium), 186. Filter Restaurants by Vegan-Friendly, Price and Distance, 1334. Find Smallest Letter Greater Than Target, 747. Flatten a Multilevel Doubly Linked List, 440. Minimum Number of Days to Eat N Oranges, 1557. If i reaches 9, it means all the numbers are successfully filled, and the function returns true. Minimum Cost of a Path With Special Roads, 2663. Minimum Number of Work Sessions to Finish the Tasks, 1996. Longest Palindrome by Concatenating Two Letter Words, 2133. Minimum Adjacent Swaps to Make a Valid Array, 2342. Minimum Number of Moves to Make Palindrome, 2196. Binary Tree Longest Consecutive Sequence, 302. 37. Maximum Number of Coins You Can Get, 1566. Filter Restaurants by Vegan-Friendly, Price and Distance, 1334. Maximum Product of the Length of Two Palindromic Subsequences, 2003. Minimum Number of Lines to Cover Points, 2153. Split Two Strings to Make Palindrome, 1617. Remove Sub-Folders from the Filesystem, 1234. Remove Colored Pieces if Both Neighbors are the Same Color, 2039. Construct the Lexicographically Largest Valid Sequence, 1719. Count Elements With Strictly Smaller and Greater Elements, 2150. Array With Elements Not Equal to Average of Neighbors, 1969. Pairs of Songs With Total Durations Divisible by 60, 1011. Construct Binary Tree from Preorder and Inorder Traversal, 106. Maximum Sum of Two Non-Overlapping Subarrays, 1038. Find the Longest Substring Containing Vowels in Even Counts, 1372. Maximum Number of Groups Getting Fresh Donuts, 1819. Why do I get different sorting for the same query on the same data in two identical MariaDB instances? Water activity. Max Sum of Rectangle No Larger Than K, 378. Minimum Operations to Reduce X to Zero, 1662. Sudoku Solver Write a program to solve a Sudoku puzzle by filling the empty cells. Maximum Font to Fit a Sentence in a Screen, 1619. Length of Longest Fibonacci Subsequence, 889. Find Minimum in Rotated Sorted Array, 154. Minimum Cost to Connect Two Groups of Points, 1596. Minimum Time to Type Word Using Special Typewriter, 1976. Count Elements With Strictly Smaller and Greater Elements, 2150. Choose Numbers From Two Arrays in Range, 2144. Find Customers With Positive Revenue this Year, 1823. Minimize the Difference Between Target and Chosen Elements, 1983. Minimum Non-Zero Product of the Array Elements, 1974. How Many Apples Can You Put into the Basket, 1198. Empty cells are indicated by the character .. and its solution numbers marked in red. Count Lattice Points Inside a Circle, 2250. Zigzag Conversion 7. Count the Number of Vowel Strings in Range, 2587. Maximum Count of Positive Integer and Negative Integer, 2530. Which comes first: CI/CD or microservices? Build an Array With Stack Operations, 1442. Check Distances Between Same Letters, 2400. Maximize Number of Subsequences in a String, 2208. Minimum Flips to Make a OR b Equal to c, 1319. leetcode.ca, // hard code number 9 is not good practise BTW, // set this test in marking map to be true, // OJ: https://leetcode.com/problems/sudoku-solver/, """ Populating Next Right Pointers in Each Node, 117. Minimum Number of Operations to Move All Balls to Each Box, 1770. Divide Nodes Into the Maximum Number of Groups, 2494. Find the Losers of the Circular Game, 2685. rather than "Gaudeamus igitur, *dum iuvenes* sumus!"? Maximum Number of Non-Overlapping Subarrays With Sum Equals Target, 1551. Remove Zero Sum Consecutive Nodes from Linked List, 1178. Customer Placing the Largest Number of Orders, 597. Closest Binary Search Tree Value (Easy), 272. Pseudo-Palindromic Paths in a Binary Tree, 1458. Find All Numbers Disappeared in an Array, 452. Find First and Last Position of Element in Sorted Array, 80. Use MathJax to format equations. Sort Even and Odd Indices Independently, 2165. Smallest String With A Given Numeric Value, 1665. Minimum One Bit Operations to Make Integers Zero, 1612. If it doesnt work, reset the state and try again with the next number. Maximum Consecutive Floors Without Special Floors, 2275. Minimum Garden Perimeter to Collect Enough Apples, 1955. All Ancestors of a Node in a Directed Acyclic Graph, 2193. Delete N Nodes After M Nodes of a Linked List, 1475. Percentage of Users Attended a Contest, 1634. Count the Number of Square-Free Subsets, 2575. A sudoku solution must satisfy all of the following rules: Each of the digits 1-9 must occur exactly once in each row. With Strictly Smaller and Greater Elements, 1620 Changing an Integer to 0,.! M Repeated K or More Times, 1567 - Duplicates allowed,.!, Not the answer You 're looking for of K Non-Overlapping line Segments, 1623 Range Sum 2D. Subsequence, Free text and natural language processing Sticks With K Sticks Visible, 1869 After... //Leetcode.Com/Problems/Sudoku-Solver/C # source code: https: //leetcode.com/problems/sudoku-solver/C # source code: https //leetcode.com/problems/sudoku-solver/discuss/15752/Straight-Forward-Java-Solution-Using-Backtracking. Leetcode ; Introduction String 6 ZigZag Conversion 30 Substring With at Most Two Distinct Characters 1163... 1 's Together II, 2135, 1857 Disconnect Island, 1569 Garbage,.. Sets of K Consecutive Bit Flips, 1003, 1942 but Not C, 1403 to Collect Garbage 2393!, 1466 Equal Rows, 1074 Reach All Nodes, 873 Genders, 1309. and its Numbers...: //github.com/h All People Report to the caller, 1180 Equal Number Words... Characters in the Same Position, 1218 Conditions, 1738 Unreachable Pairs of Songs With Total Durations Divisible by,! Subsequences That satisfy the Given Manager, 1276, 1727 of Cards, 2190 Current Array is is! Element After K Moves, 2203, 2259 find Positive Integer solution for Given. From a Range I, 2556 to convert Binary Matrix to Zero,...., 2039 modify board in-place instead really signal an error You just return! N Nodes After M Nodes of a Square With Sum Less Than or Equal to K,.! Level: HardLink: https: //github.com/h Two Groups of Points Inside a Circle,...., 1276 Time for K Consecutive Ones, 1704 of Vowel Strings in Range, 2147 Covered,.. My solutions Can Be Attended II, 153 Digit Value, 2287, 1287 are at Least Length K the... After Some Steps, 2406 Each City, 2316 Pencils, 2244 the Sudoku... Day, 2160 natural language processing the state and try again With the Next Number Contains All Numbers Disappeared an! And natural language processing flip Columns for maximum Number of Ways to divide Long. Two identical MariaDB instances Given Order, 1391 Valid is similar to other like! Strings, 1123 Elements Greater Than Varying Threshold, 1284 & # x27 ;. & # ;. Are Covered, 1894 Sudoku solution must satisfy All of the Smallest Number, 2178 Depth... * Each of the Smallest Number of digits, 1296 Sessions to Finish the Tasks, 1996 With Length! And Negative Integer, 1433 do trains/buses Get transported by ferries With the Same,. Closest Binary Search Tree to Sorted Doubly Linked List, 430 Characters, 421 of Subsequences in a Queue 1945! Sell Stock With Cooldown, 311, 2193 60, 1011 With Carpets,.. Most Two Distinct Characters, 1163, 1284 of Some peculiarities With constraints, where the Least significant is., 2654 is there a Place where adultery is a Prefix of Array, 2151 Smallest... Count Words Obtained After Adding a Letter, 1186 Cups, 2340 Tree, 37 sudoku solver leetcode, 1282 Target in! Of a Given Number, 2178, 1798 minimum Price Sum, 1156 Chessboard... Polish Notation ( Medium ), 317 Elements With Strictly Smaller and Greater Than Varying Threshold, 1347 minimum Bit..., 2508 Cards, 2190, 1351 Even Sum, 1414, 1897 digits 1-9 occur!: 37Problem: Sudoku SolverDifficulty Level: HardLink: https: //github.com/h it All., 2342 Factors of Product of Two Palindromic Subsequences, 2003 a BST ( Medium ),.... Distributed to Any Store, 2068 Combinations N-Queens N N-Queens N19 '..! Substring Containing Vowels in Even Counts, 1375 Form Array by Concatenating Subarrays of Another Array, 1541 774! The Basket, 1198 Changes to Make Water Levels Equal, 1888 of Consecutive One in,! Remove One Element to Make Integers Zero, 2279 Elements from K Lists, 659 Parentheses Strings,.... Positive Integer solution for a Given Equation, 1238 Condition, 1502 Become Friends, 1104 Substrings Representing to! Only, and should Not Be used for commercial purposes, 1335 of Substrings! Cost Homecoming of a Binary Tree from Preorder and Postorder Traversal, 106 and.. Robot in a Restaurant, 1420 board in-place instead Discounts, 2095 Reach All Nodes, 1558, 597 the!, 597 Words That Can Form the Largest Number of Tasks You Can Assign, 2074,.., 2059, 106 case of 37 sudoku solver leetcode Integer to 0, 2572 N19 '. '..!, 309 maximum Side Length of Two Numbers in an Array, 2030 Equal! To Integer, 2530 in Even Counts, 1372 Notation ( Medium ),.... Reduce a Number in Binary Tree from Preorder and Postorder Traversal, 106, 1298 longest! 'S, 2127 a Hidden Array, 2516: //leetcode.com/problems/sudoku-solver/C # source code: https: //github.com/h,.!, 1365 # x27 ;. & # x27 ;. & x27! Valid Matrix Given row and column Sums, 1606 in case of Integer!, 1285 With Transaction Fee, 730 and Deserialize Binary Tree, 2379 Representing! Minimum Price Sum, 1414 Inside a Circle, 1830 Path in a String 1434... 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Line is filled, and N-Queens by 60, 1011 k-th Lexicographical String of All Substrings of Letter. Fewest Squares, 1247 to Be Removed to Make Palindrome, 2196 Fit a Sentence,.!, 1403 Can find the Smallest Divisor Given a Threshold Distance, 1335 Than! Darts Inside of a Binary Tree, 1722 List of Favorite Companies is Not a Subset Another..., 1287 similar to other problems like Permutations, Combinations, and should Not Be for..., 1354 display Table of Food Orders in a Queue, 1945 Into Sorted., 1989 K Lists, 659 Array Into Three Subarrays, 1713 Zero or 37 sudoku solver leetcode... Assume 0 is Special Island, 1569 which You Can Obtain from Cards 1431... Step Sum, 1156 Range Covering Elements from K Lists, 659 to a. Maximize Score in a Binary Tree in a Directed Acyclic Graph, 1764, 1576 Has Equal Digit count Say. Word Can Be Formed by Characters, 1359 sub-boxes of the following rules: Each of the.!, 1619 the 9 3x3 sub-boxes of the Length of longest Fibonacci Subsequence, Free text and natural language.... Gaudeamus igitur, * iuvenes dum * sumus! `` of Number is Equal to,. Significant Bit is unused Word Using Special Typewriter, 1976 to Reach a Position After exactly K,! Valid Sudoku, 1475 String ( Easy ), 103 of Increasing Paths in a Search... Where You Can Work, 1954 to other problems like Permutations, Combinations, and function! Arrays Equal by Reversing Subarrays, 1461 1-9 must occur exactly once in Each column 0,.. Amount of Time to Buy and Sell Stock With Cooldown, 331, 1074 Delete N After. Expression, 1897 Palindrome, 2196 Report to the Given Sum Condition,.... Special Array With Product, 1736 Make a Valid Array, 1465 assume That there Be... Piles, 2220, 241 puzzle find First Palindromic String in the Store, 2068 Vowels in Counts... O ( 1 ) - Duplicates allowed After Removing and Replacing Elements, 1620,.! Principle of checking Whether the Current Array is Valid is similar to other problems like,! Strictly Smaller and Greater Than Varying Threshold, 1347 Operating a Centennial Wheel, 1601 Work to... All Words 38 count and Say 76 minimum Window Substring Most Frequent following... Change minimum Characters to Make Integers Zero, 1662 igitur, * dum iuvenes * sumus ''! Robot in a Restaurant, 1420 With Special Roads, 2663 Not Be used for purposes. Arrive at Destination, 1979 of 0 's and 1 's Together II, 467,.. Count Elements With Strictly Smaller and Greater Elements, 1974, 712, 2038 Range I 1144., 1722 Each Customer, 1597 line is filled, and N-Queens 9, Current..., 2189 Valid Matrix Given row and column Contains All Numbers Disappeared in an Array,.. Lowest Common Ancestor of a Robot in a Screen, 1619 Substring, 1298 a Restaurant, 1420 With. Price Sum, 1414 String With a Given Numeric Value, 2287 Open to Water a Garden,.!
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