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Indexed by TopGit from live GitHub metadata: haoel/leetcode has 18.1k stars, written primarily in C++. LeetCode Problems' Solutions
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LeetCode
LeetCode Algorithm
(Notes: "🔒" means you need to buy a book from Leetcode)
| # | Title | Solution | Difficulty |
|---|---|---|---|
| 1946 | Largest Number After Mutating Substring | C++, Java | Medium |
| 1945 | Sum of Digits of String After Convert | C++ | Easy |
| 1935 | Maximum Number of Words You Can Type | C++ | Easy |
| 1884 | Egg Drop With 2 Eggs and N Floors | C++ | Medium |
| 1882 | Process Tasks Using Servers | C++ | Medium |
| 1881 | Maximum Value after Insertion | C++ | Medium |
| 1880 | Check if Word Equals Summation of Two Words | C++ | Easy |
| 1877 | Minimize Maximum Pair Sum in Array | C++ | Medium |
| 1876 | Substrings of Size Three with Distinct Characters | C++ | Easy |
| 1871 | Jump Game VII | C++ | Medium |
| 1870 | Minimum Speed to Arrive on Time | C++ | Medium |
| 1869 | Longer Contiguous Segments of Ones than Zeros | C++ | Easy |
| 1862 | Sum of Floored Pairs | C++ | Hard |
| 1861 | Rotating the Box | C++ | Medium |
| 1860 | Incremental Memory Leak | C++ | Medium |
| 1859 | Sorting the Sentence | C++ | Easy |
| 1857 | Largest Color Value in a Directed Graph | C++ | Hard |
| 1856 | Maximum Subarray Min-Product | C++ | Medium |
| 1855 | Maximum Distance Between a Pair of Values | C++ | Medium |
| 1854 | Maximum Population Year | C++ | Easy |
| 1851 | Minimum Interval to Include Each Query | C++ | Hard |
| 1850 | Minimum Adjacent Swaps to Reach the Kth Smallest Number | C++ | Medium |
| 1849 | Splitting a String Into Descending Consecutive Values | C++ | Medium |
| 1848 | Minimum Distance to the Target Element | C++ | Easy |
| 1847 | Closest Room | C++ | Hard |
| 1846 | Maximum Element After Decreasing and Rearranging | C++ | Medium |
| 1845 | Seat Reservation Manager | C++ | Medium |
| 1844 | Replace All Digits with Characters | C++ | Easy |
| 1840 | Maximum Building Height | C++ | Hard |
| 1839 | Longest Substring Of All Vowels in Order | C++ | Medium |
| 1838 | Frequency of the Most Frequent Element | C++ | Medium |
| 1837 | Sum of Digits in Base K | C++ | Easy |
| 1835 | Find XOR Sum of All Pairs Bitwise AND | C++ | Hard |
| 1834 | Single-Threaded CPU | C++ | Medium |
| 1833 | Maximum Ice Cream Bars | C++ | Medium |
| 1832 | Check if the Sentence Is Pangram | C++ | Easy |
| 1829 | Maximum XOR for Each Query | C++ | Medium |
| 1828 | Queries on Number of Points Inside a Circle | C++ | Medium |
| 1827 | Minimum Operations to Make the Array Increasing | C++ | Easy |
| 1825 | Finding MK Average | C++ | Hard |
| 1824 | Minimum Sideway Jumps | C++ | Medium |
| 1823 | Find the Winner of the Circular Game | C++ | Medium |
| 1822 | Sign of the Product of an Array | C++ | Easy |
| 1819 | Number of Different Subsequences GCDs | C++ | Hard |
| 1818 | Minimum Absolute Sum Difference | C++ | Medium |
| 1817 | Finding the Users Active Minutes | C++ | Medium |
| 1816 | Truncate Sentence | C++ | Easy |
| 1815 | Maximum Number of Groups Getting Fresh Donuts | C++ | Hard |
| 1814 | Count Nice Pairs in an Array | C++ | Medium |
| 1813 | Sentence Similarity III | C++ | Medium |
| 1812 | Determine Color of a Chessboard Square | C++ | Easy |
| 1808 | Maximize Number of Nice Divisors | C++ | Hard |
| 1807 | Evaluate the Bracket Pairs of a String | C++ | Medium |
| 1806 | Minimum Number of Operations to Reinitialize a Permutation | C++ | Medium |
| 1805 | Number of Different Integers in a String | C++ | Easy |
| 1803 | Count Pairs With XOR in a Range | C++ | Hard |
| 1802 | Maximum Value at a Given Index in a Bounded Array | C++ | Medium |
| 1801 | Number of Orders in the Backlog | C++ | Medium |
| 1800 | Maximum Ascending Subarray Sum | C++ | Easy |
| 1799 | Maximize Score After N Operations | C++ | Hard |
| 1798 | Maximum Number of Consecutive Values You Can Make | C++ | Medium |
| 1797 | Design Authentication Manager | C++ | Medium |
| 1796 | Second Largest Digit in a String | C++ | Easy |
| 1793 | Maximum Score of a Good Subarray | C++ | Hard |
| 1792 | Maximum Average Pass Ratio | C++ | Medium |
| 1791 | Find Center of Star Graph | C++ | Medium |
| 1790 | Check if One String Swap Can Make Strings Equal | C++ | Easy |
| 1787 | Make the XOR of All Segments Equal to Zero | C++ | Hard |
| 1786 | Number of Restricted Paths From First to Last Node | C++ | Medium |
| 1785 | Minimum Elements to Add to Form a Given Sum | C++ | Medium |
| 1784 | Check if Binary String Has at Most One Segment of Ones | C++ | Easy |
| 1782 | Count Pairs Of Nodes | C++ | Hard |
| 1781 | Sum of Beauty of All Substrings | C++ | Medium |
| 1780 | Check if Number is a Sum of Powers of Three | C++ | Medium |
| 1779 | Find Nearest Point That Has the Same X or Y Coordinate | C++ | Easy |
| 1775 | Equal Sum Arrays With Minimum Number of Operations | C++ | Medium |
| 1774 | Closest Dessert Cost | C++ | Medium |
| 1773 | Count Items Matching a Rule | C++ | Easy |
| 1771 | Maximize Palindrome Length From Subsequences | C++ | Hard |
| 1770 | Maximum Score from Performing Multiplication Operations | C++ | Medium |
| 1769 | Minimum Number of Operations to Move All Balls to Each Box | C++ | Medium |
| 1768 | Merge Strings Alternately | C++ | Easy |
| 1766 | Tree of Coprimes | C++ | Hard |
| 1765 | Map of Highest Peak | C++ | Medium |
| 1764 | Form Array by Concatenating Subarrays of Another Array | C++ | Medium |
| 1763 | Longest Nice Substring | C++ | Easy |
| 1761 | Minimum Degree of a Connected Trio in a Graph | C++ | Hard |
| 1760 | Minimum Limit of Balls in a Bag | C++ | Medium |
| 1759 | Count Number of Homogenous Substrings | C++ | Medium |
| 1758 | Minimum Changes To Make Alternating Binary String | C++ | Easy |
| 1755 | Closest Subsequence Sum | C++ | Hard |
| 1754 | Largest Merge Of Two Strings | C++ | Medium |
| 1753 | Maximum Score From Removing Stones | C++ | Medium |
| 1752 | Check if Array Is Sorted and Rotated | C++ | Easy |
| 1751 | Maximum Number of Events That Can Be Attended II | C++ | Hard |
| 1750 | Minimum Length of String After Deleting Similar Ends | C++ | Medium |
| 1749 | Maximum Absolute Sum of Any Subarray | C++ | Medium |
| 1748 | Sum of Unique Elements | C++ | Easy |
| 1743 | Restore the Array From Adjacent Pairs | C++ | Medium |
| 1742 | Maximum Number of Balls in a Box | C++ | Easy |
| 1739 | Building Boxes | C++ | Hard |
| 1738 | Find Kth Largest XOR Coordinate Value | C++ | Medium |
| 1736 | Latest Time by Replacing Hidden Digits | C++ | Easy |
| 1734 | Decode XORed Permutation | C++ | Medium |
| 1733 | Minimum Number of People to Teach | C++ | Medium |
| 1732 | Find the Highest Altitude | C++ | Easy |
| 1727 | Largest Submatrix With Rearrangements | C++ | Medium |
| 1726 | Tuple with Same Product | C++ | Medium |
| 1725 | Number Of Rectangles That Can Form The Largest Square | C++ | Easy |
| 1718 | Construct the Lexicographically Largest Valid Sequence | C++ | Medium |
| 1717 | Maximum Score From Removing Substrings | C++ | Medium |
| 1716 | Calculate Money in Leetcode Bank | C++ | Easy |
| 1712 | Ways to Split Array Into Three Subarrays | C++ | Medium |
| 1711 | Count Good Meals | C++ | Medium |
| 1710 | Maximum Units on a Truck | C++ | Easy |
| 1700 | Number of Students Unable to Eat Lunch | C++ | Easy |
| 1695 | Maximum Erasure Value | C++ | Medium |
| 1694 | Reformat Phone Number | C++ | Easy |
| 1625 | Lexicographically Smallest String After Applying Operations | C++ | Medium |
| 1624 | Largest Substring Between Two Equal Characters | C++ | Easy |
| 1605 | Find Valid Matrix Given Row and Column Sums | C++ | Medium |
| 1573 | Number of Ways to Split a String | C++ | Medium |
| 1556 | Thousand Separator | C++ | Easy |
| 1551 | Minimum Operations to Make Array Equal | C++ | Medium |
| 1550 | Three Consecutive Odds | C++ | Easy |
| 1541 | Minimum Insertions to Balance a Parentheses String | C++ | Medium |
| 1535 | Find the Winner of an Array Game | C++ | Medium |
| 1529 | Bulb Switcher IV | C++ | Medium |
| 1528 | Shuffle String | C++ | Easy |
| 1525 | Number of Good Ways to Split a String | C++ | Medium |
| 1524 | Number of Sub-arrays With Odd Sum | C++ | Medium |
| 1523 | Count Odd Numbers in an Interval Range | C++ | Easy |
| 1513 | Number of Substrings With Only 1s | C++ | Medium |
| 1470 | Shuffle the Array | C++ | Easy |
| 1464 | Maximum Product of Two Elements in an Array | C++ | Easy |
| 1460 | Make Two Arrays Equal by Reversing Sub-arrays | C++ | Easy |
| 1376 | Time Needed to Inform All Employees | C++ | Medium |
| 1375 | Bulb Switcher III | C++ | Medium |
| 1353 | Maximum Number of Events That Can Be Attended | C++ | Medium |
| 1333 | Filter Restaurants by Vegan-Friendly, Price and Distance | C++ | Medium |
| 1207 | Unique Number of Occurrences | C++ | Easy |
| 1170 | Compare Strings by Frequency of the Smallest Character | C++ | Easy |
| 1071 | Greatest Common Divisor of Strings | C++ | Easy |
| 1030 | Matrix Cells in Distance Order | C++ | Easy |
| 1029 | Two City Scheduling | C++ | Easy |
| 1028 | Recover a Tree From Preorder Traversal | C++ | Hard |
| 1024 | Video Stitching | C++ | Medium |
| 993 | Cousins in Binary Tree | C++ | Easy |
| 991 | Broken Calculator | C++ | Medium |
| 990 | Satisfiability of Equality Equations | C++ | Medium |
| 989 | Add to Array-Form of Integer | C++ | Easy |
| 988 | Smallest String Starting From Leaf | C++ | Medium |
| 987 | Vertical Order Traversal of a Binary Tree | C++ | Medium |
| 986 | Interval List Intersections | C++ | Medium |
| 985 | Sum of Even Numbers After Queries | C++ | Easy |
| 984 | String Without AAA or BBB | C++ | Easy |
| 983 | Minimum Cost For Tickets | C++ | Medium |
| 982 | Triples with Bitwise AND Equal To Zero | C++ | Hard |
| 981 | Time Based Key-Value Store | C++ | Medium |
| 980 | Unique Paths III | C++,Python | Hard |
| 979 | Distribute Coins in Binary Tree | C++ | Medium |
| 978 | Longest Turbulent Subarray | C++,Python | Medium |
| 977 | Squares of a Sorted Array | C++, Python | Easy |
| 976 | Largest Perimeter Triangle | C++, Python | Easy |
| 971 | Flip Binary Tree To Match Preorder Traversal | Python | Medium |
| 969 | Pancake Sorting | Python | Medium |
| 961 | N-Repeated element in size 2N Array | C++ | Easy |
| 958 | Check Completeness of a Binary Tree | Python | Medium |
| 951 | Flip Equivalent Binary Trees | Python | Medium |
| 950 | Reveal Cards In Increasing Order | Python | Medium |
| 941 | Valid Mountain Array | Python | Easy |
| 933 | Number of Recent Calls | C++ | Easy |
| 931 | Minimum Falling Path Sum | C++ | Medium |
| 929 | Unique Email Addresses | C++ | Easy |
| 922 | Sort Array By Parity II | C++ | Easy |
| 914 | X of a Kind in a Deck of Cards | Python | Easy |
| 905 | Sort Array By Parity | C++ | Easy |
| 876 | Middle of the Linked List | Python | Easy |
| 859 | Buddy Strings | C++ | Easy |
| 858 | Mirror Reflection | C++ | Medium |
| 852 | Peak Index in a Mountain Array | C++ | Easy |
| 849 | Maximize Distance to Closest Person | Python | Easy |
| 844 | Backspace String Compare | C++ | Easy |
| 837 | Most Common Word | C++ | Easy |
| 830 | Positions of Large Groups | Python | Easy |
| 820 | Short Encoding of Words | C++ | Medium |
| 804 | Unique Morse Code Words | C++ | Easy |
| 776 | Swim In Rising Water | Python | Hard |
| 771 | Jewels and Stones | C++ | Easy |
| 747 | Largest Number At Least Twice of Others | Python | Easy |
| 746 | Min Cost Climbing Stairs | C++, Python | Easy |
| 721 | Accounts Merge | C++ | Medium |
| 717 | 1-bit and 2-bit Characters | Python | Easy |
| 714 | Best Time to Buy and Sell Stock with Transaction Fee | C++ | Medium |
| 712 | Minimum ASCII Delete Sum for Two Strings | C++ | Medium |
| 695 | Max Area of Island | C++ | Medium |
| 687 | Longest Univalue Path | Python | Easy |
| 684 | Redundant Connection | Python | Medium |
| 674 | Longest Continuous Increasing Subsequence | Python | Easy |
| 672 | Bulb Switcher II | C++ | Medium |
| 671 | Second Minimum Node In a Binary Tree | Python | Easy |
| 665 | Non-decreasing Array | Python | Easy |
| 662 | Maximum Width of Binary Tree | Python | Medium |
| 661 | Image Smoother | Python | Easy |
| 655 | Print Binary Tree | Python | Medium |
| 652 | Find Duplicate Subtrees | Python | Medium |
| 647 | Palindromic Substrings | C++ | Medium |
| 643 | Maximum Average Subarray I | C++, Python | Easy |
| 628 | Maximum Product of Three Numbers | Python | Easy |
| 623 | Add One Row to Tree | Python | Medium |
| 581 | Shortest Unsorted Continuous Subarray | Python | Easy |
| 572 | Subtree of Another Tree | Python | Easy |
| 563 | Binary Tree Tilt | Python | Easy |
| 547 | Friend Circles | C++ | Medium |
| 543 | Diameter of Binary Tree | C++, Python | Easy |
| 538 | Convert BST to Greater Tree | Python | Easy |
| 532 | K-diff Pairs in an Array | Python | Easy |
| 520 | Detect Capital | C++ | Easy |
| 518 | Coin Change 2 | C++ | Medium |
| 516 | Longest Palindromic Subsequence | C++ | Medium |
| 509 | Fibonacci Number | C++, Python | Easy |
| 497 | Random Point in Non-overlapping Rectangles | C++ | Medium |
| 494 | Target Sum | C++ | Medium |
| 477 | Total Hamming Distance | C++ | Medium |
| 463 | Island Perimeter | C++ | Easy |
| 450 | DeleteNodeInABST | Python | Medium |
| 449 | Serialize and Deserialize BST | Python | Medium |
| 438 | Find all Anagrams in a string | C++ | Medium |
| 437 | Path Sum III | Python | Medium |
| 418 | SentenceScreenFitting 🔒 | C++ | Easy |
| 416 | Partition Equal Subset Sum | C++ | Medium |
| 415 | Add Strings | C++ | Easy |
| 414 | Third Maximum Number | C++, Python | Easy |
| 413 | Arithmetic Slices | C++ | Medium |
| 412 | Fizz Buzz | C++ | Easy |
| 410 | Split Array Largest Sum | C++ | Hard |
| 409 | Longest Palindrome | C++ | Easy |
| 406 | Queue Reconstruction by Height | C++ | Medium |
| 405 | Convert a Number to Hexadecimal | C++ | Easy |
| 404 | Sum of Left Leaves | C++, Python | Easy |
| 403 | Frog Jump | C++ | Hard |
| 402 | Remove K Digits | C++ | Medium |
| 401 | Binary Watch | C++ | Easy |
| 400 | Nth Digit | C++ | Medium |
| 399 | Evaluate Division | C++ | Medium |
| 398 | Random Pick Index | C++ | Medium |
| 397 | Integer Replacement | C++ | Medium |
| 396 | Rotate Function | C++ | Easy |
| 395 | Longest Substring with At Least K Repeating Characters | C++ | Medium |
| 394 | Decode String | C++ | Medium |
| 393 | UTF-8 Validation | C++ | Medium |
| 392 | Is Subsequence | C++ | Medium |
| 391 | Perfect Rectangle | C++ | Hard |
| 390 | Elimination Game | C++ | Medium |
| 389 | Find the Difference | C++ | Easy |
| 388 | Longest Absolute File Path | C++ | Medium |
| 387 | First Unique Character in a String | C++ | Easy |
| 386 | Lexicographical Numbers | C++ | Medium |
| 385 | Mini Parser | C++ | Medium |
| 384 | Shuffle an Array | C++ | Medium |
| 383 | Ransom Note | C++ | Easy |
| 382 | Linked List Random Node | C++ | Medium |
| 381 | Insert Delete GetRandom O(1) - Duplicates allowed | C++ | Hard |
| 380 | Insert Delete GetRandom O(1) | C++ | Hard |
| 377 | Combination Sum IV | C++ | Medium |
| 376 | Wiggle Subsequence | C++ | Medium |
| 371 | Sum of Two Integers | C++ | Easy |
| 367 | Valid Perfect Square | C++ | Easy |
| 357 | Count Numbers with Unique Digits | C++ | Medium |
| 350 | Intersection of Two Arrays II | C++ | Easy |
| 349 | Intersection of Two Arrays | C++ | Easy |
| 347 | Top K Frequent Elements | C++ | Medium |
| 345 | Reverse Vowels of a String | C++ | Easy |
| 344 | Reverse String | C++ | Easy |
| 343 | Integer Break | C++ | Medium |
| 342 | Power of Four | C++ | Easy |
| 341 | Flatten Nested List Iterator | C++ | Medium |
| 338 | Counting Bits | C++ | Medium |
| 337 | House Robber III | C++, Python | Medium |
| 336 | Palindrome Pairs | C++ | Hard |
| 334 | Increasing Triplet Subsequence | C++ | Medium |
| 332 | Reconstruct Itinerary | C++ | Medium |
| 331 | Verify Preorder Serialization of a Binary Tree | C++ | Medium |
| 330 | Patching Array | C++ | Medium |
| 329 | Longest Increasing Path in a Matrix | C++ | Medium |
| 328 | Odd Even Linked List | C++ | Easy |
| 327 | Count of Range Sum | C++ | Hard |
| 326 | Power of Three | C++ | Easy |
| 324 | Wiggle Sort II | C++ | Medium |
| 322 | Coin Change | C++ | Medium |
| 321 | Create Maximum Number | C++ | Hard |
| 319 | Bulb Switcher | C++ | Medium |
| 318 | Maximum Product of Word Lengths | C++ | Medium |
| 316 | Remove Duplicate Letters | C++ | Hard |
| 315 | Count of Smaller Numbers After Self | C++ | Hard |
| 313 | Super Ugly Number | C++ | Medium |
| 312 | Burst Balloons | C++ | Hard |
| 310 | Minimum Height Trees | C++ | Medium |
| 309 | Best Time to Buy and Sell Stock with Cooldown | C++ | Medium |
| 307 | Range Sum Query - Mutable | C++ | Medium |
| 306 | Additive Number | C++ | Medium |
| 304 | Range Sum Query 2D - Immutable | C++ | Medium |
| 303 | Range Sum Query - Immutable | C++ | Easy |
| 301 | Remove Invalid Parentheses | C++ | Hard |
| 300 | Longest Increasing Subsequence | C++ | Medium |
| 299 | Bulls and Cows | C++ | Easy |
| 297 | Serialize and Deserialize Binary Tree | C++ | Medium |
| 295 | Find Median from Data Stream | C++ | Hard |
| 292 | Nim Game | C++ | Easy |
| 290 | Word Pattern | C++ | Easy |
| 289 | Game of Life | C++ | Medium |
| 287 | Find the Duplicate Number | C++, Python | Hard |
| 285 | Inorder Successor in BST 🔒 | Java | Medium |
| 284 | Peeking Iterator | C++ | Medium |
| 283 | Move Zeroes | C++ | Easy |
| 282 | Expression Add Operators | C++ | Hard |
| 279 | Perfect Squares | C++ | Medium |
| 278 | First Bad Version | C++, Java | Easy |
| 275 | H-Index II | C++ | Medium |
| 274 | H-Index | C++ | Medium |
| 273 | Integer to English Words | C++ | Medium |
| 268 | Missing Number | C++ | Medium |
| 264 | Ugly Number II | C++ | Medium |
| 263 | Ugly Number | C++ | Easy |
| 260 | Single Number III | C++ | Medium |
| 258 | Add Digits | C++ | Easy |
| 257 | Binary Tree Paths | C++ | Easy |
| 242 | Valid Anagram | C++, Java | Easy |
| 241 | Different Ways to Add Parentheses | C++, Python | Medium |
| 240 | Search a 2D Matrix II | C++, Java, Python | Medium |
| 239 | Sliding Window Maximum | C++ | Hard |
| 238 | Product of Array Except Self | C++ | Medium |
| 237 | Delete Node in a Linked List | C++ | Easy |
| 236 | Lowest Common Ancestor of a Binary Tree | C++, Java, Python | Medium |
| 235 | Lowest Common Ancestor of a Binary Search Tree | C++, Python | Easy |
| 234 | Palindrome Linked List | C++ | Easy |
| 233 | Number of Digit One | C++ | Medium |
| 232 | Implement Queue using Stacks | C++, Java | Easy |
| 231 | Power of Two | C++ | Easy |
| 230 | Kth Smallest Element in a BST | C++, Python | Medium |
| 229 | Majority Element II | C++ | Medium |
| 228 | Summary Ranges | C++ | Easy |
| 227 | Basic Calculator II | C++ | Medium |
| 226 | Invert Binary Tree | C++ | Easy |
| 225 | Implement Stack using Queues | C++, Java | Medium |
| 224 | Basic Calculator | C++ | Medium |
| 223 | Rectangle Area | C++ | Easy |
| 222 | Count Complete Tree Nodes | C++, Python | Medium |
| 221 | Maximal Square | C++ | Medium |
| 220 | Contains Duplicate III | C++, Python | Medium |
| 219 | Contains Duplicate II | C++, Python | Easy |
| 218 | The Skyline Problem | C++ | Hard |
| 217 | Contains Duplicate | C++ | Easy |
| 216 | Combination Sum III | C++ | Medium |
| 215 | Kth Largest Element in an Array | C++ | Medium |
| 214 | Shortest Palindrome | C++ | Hard |
| 213 | House Robber II | C++ | Medium |
| 212 | Word Search II | C++ | Hard |
| 211 | Add and Search Word - Data structure design | C++ | Medium |
| 210 | Course Schedule II | C++ | Medium |
| 209 | Minimum Size Subarray Sum | C++ | Medium |
| 208 | Implement Trie (Prefix Tree) | C++ | Medium |
| 207 | Course Schedule | C++ | Medium |
| 206 | Reverse Linked List | C++, Java | Easy |
| 205 | Isomorphic Strings | C++ | Easy |
| 204 | Count Primes | C++ | Easy |
| 203 | Remove Linked List Elements | C++ | Easy |
| 202 | Happy Number | C++, Python | Easy |
| 201 | Bitwise AND of Numbers Range | C++ | Medium |
| 200 | Number of Islands | C++, Python | Medium |
| 199 | Binary Tree Right Side View | C++ | Medium |
| 198 | House Robber | C++, Python | Easy |
| 191 | Number of 1 Bits | C++ | Easy |
| 190 | Reverse Bits | C++ | Easy |
| 189 | Rotate Array | C++, Java | Easy |
| 188 | Best Time to Buy and Sell Stock IV | C++ | Hard |
| 187 | Repeated DNA Sequences | C++ | Medium |
| 186 | Reverse Words in a String II 🔒 | C++ | Medium |
| 179 | Largest Number | C++ | Medium |
| 174 | Dungeon Game | C++ | Hard |
| 173 | Binary Search Tree Iterator | C++, Java, Python | Medium |
| 172 | Factorial Trailing Zeroes | C++ | Easy |
| 171 | Excel Sheet Column Number | C++ | Easy |
| 170 | Two Sum III - Data structure design 🔒 | C++ | Easy |
| 169 | Majority Element | C++ | Easy |
| 168 | Excel Sheet Column Title | C++ | Easy |
| 167 | Two Sum II - Input array is sorted 🔒 | C++ | Medium |
| 166 | Fraction to Recurring Decimal | C++ | Medium |
| 165 | Compare Version Numbers | C++ | Easy |
| 164 | Maximum Gap | C++ | Hard |
| 163 | Missing Ranges 🔒 | C++ | Medium |
| 162 | Find Peak Element | C++, Java | Medium |
| 161 | One Edit Distance🔒 | C++ | Medium |
| 160 | Intersection of Two Linked Lists | C++ | Easy |
| 159 | Longest Substring with At Most Two Distinct Characters 🔒 | C++ | Hard |
| 158 | Read N Characters Given Read4 II - Call multiple times 🔒 | C++ | Hard |
| 157 | Read N Characters Given Read4 🔒 | C++ | Easy |
| 156 | Binary Tree Upside Down 🔒 | C++ | Medium |
| 155 | Min Stack | C++, Java | Easy |
| 154 | Find Minimum in Rotated Sorted Array II | C++ | Hard |
| 153 | Find Minimum in Rotated Sorted Array | C++, Java | Medium |
| 152 | Maximum Product Subarray | C++ | Medium |
| 151 | Reverse Words in a String | C++, Java | Medium |
| 150 | Evaluate Reverse Polish Notation | C++ | Medium |
| 149 | Max Points on a Line | C++ | Hard |
| 148 | Sort List | C++, Python | Medium |
| 147 | Insertion Sort List | C++, Python | Medium |
| 146 | LRU Cache | C++, Java | Hard |
| 145 | Binary Tree Postorder Traversal | C++, Python | Hard |
| 144 | Binary Tree Preorder Traversal | C++, Java | Medium |
| 143 | Reorder List | C++, Python | Medium |
| 142 | Linked List Cycle II | C++, Python | Medium |
| 141 | Linked List Cycle | C++ | Medium |
| 140 | Word Break II | C++ | Hard |
| 139 | Word Break | C++ | Medium |
| 138 | Copy List with Random Pointer | C++, Python | Hard |
| 137 | Single Number II | C++, Python | Medium |
| 136 | Single Number | C++ | Medium |
| 135 | Candy | C++ | Hard |
| 134 | Gas Station | C++ | Medium |
| 133 | Clone Graph | C++ | Medium |
| 132 | Palindrome Partitioning II | C++ | Hard |
| 131 | Palindrome Partitioning | C++ | Medium |
| 130 | Surrounded Regions | C++ | Medium |
| 129 | Sum Root to Leaf Numbers | C++, Python | Medium |
| 128 | Longest Consecutive Sequence | C++, Python | Medium |
| 127 | Word Ladder | C++ | Medium |
| 126 | Word Ladder II | C++ | Hard |
| 125 | Valid Palindrome | C++, Java | Easy |
| 124 | Binary Tree Maximum Path Sum | C++, Java | Hard |
| 123 | Best Time to Buy and Sell Stock III | C++ | Hard |
| 122 | Best Time to Buy and Sell Stock II | C++ | Medium |
| 121 | Best Time to Buy and Sell Stock | C++ | Medium |
| 120 | Triangle | C++, Java | Medium |
| 119 | Pascal's Triangle II | C++ | Easy |
| 118 | Pascal's Triangle | C++ | Easy |
| 117 | Populating Next Right Pointers in Each Node II | C++, Python | Hard |
| 116 | Populating Next Right Pointers in Each Node | C++, Python | Medium |
| 115 | Distinct Subsequences | C++ | Hard |
| 114 | Flatten Binary Tree to Linked List | C++, Python | Medium |
| 113 | Path Sum II | C++, Python | Medium |
| 112 | Path Sum | C++ | Easy |
| 111 | Minimum Depth of Binary Tree | C++ | Easy |
| 110 | Balanced Binary Tree | C++, Java | Easy |
| 109 | Convert Sorted List to Binary Search Tree | C++ | Medium |
| 108 | Convert Sorted Array to Binary Search Tree | C++ | Medium |
| 107 | Binary Tree Level Order Traversal II | C++ | Easy |
| 106 | Construct Binary Tree from Inorder and Postorder Traversal | C++, Python | Medium |
| 105 | Construct Binary Tree from Preorder and Inorder Traversal | C++, Python | Medium |
| 104 | Maximum Depth of Binary Tree | C++, Java | Easy |
| 103 | Binary Tree Zigzag Level Order Traversal | C++, Python | Medium |
| 102 | Binary Tree Level Order Traversal | C++, Java | Easy |
| 101 | Symmetric Tree | C++ | Easy |
| 100 | Same Tree | C++ | Easy |
| 99 | Recover Binary Search Tree | C++ | Hard |
| 98 | Validate Binary Search Tree | C++, Java, Python | Medium |
| 97 | Interleaving String | C++ | Hard |
| 96 | Unique Binary Search Trees | C++, Python | Medium |
| 95 | Unique Binary Search Trees II | C++, Python | Medium |
| 94 | Binary Tree Inorder Traversal | C++ | Medium |
| 93 | Restore IP Addresses | C++ | Medium |
| 92 | Reverse Linked List II | C++, Java, Python | Medium |
| 91 | Decode Ways | C++ | Medium |
| 90 | Subsets II | C++, Java | Medium |
| 89 | Gray Code | C++ | Medium |
| 88 | Merge Sorted Array | C++ | Easy |
| 87 | Scramble String | C++ | Hard |
| 86 | Partition List | C++, Python | Medium |
| 85 | Maximal Rectangle | C++ | Hard |
| 84 | Largest Rectangle in Histogram | C++ | Hard |
| 83 | Remove Duplicates from Sorted List | C++ | Easy |
| 82 | Remove Duplicates from Sorted List II | C++, Python | Medium |
| 81 | Search in Rotated Sorted Array II | C++ | Medium |
| 80 | Remove Duplicates from Sorted Array II | C++ | Medium |
| 79 | Word Search | C++ | Medium |
| 78 | Subsets | C++, Java, Python | Medium |
| 77 | Combinations | C++ | Medium |
| 76 | Minimum Window Substring | C++ | Hard |
| 75 | Sort Colors | C++ | Medium |
| 74 | Search a 2D Matrix | C++, Java | Medium |
| 73 | Set Matrix Zeroes | C++ | Medium |
| 72 | Edit Distance | C++ | Hard |
| 71 | Simplify Path | C++ | Medium |
| 70 | Climbing Stairs | C++, Java | Easy |
| 69 | Sqrt(x) | C++ | Medium |
| 68 | Text Justification | C++ | Hard |
| 67 | Add Binary | C++ | Easy |
| 66 | Plus One | C++ | Easy |
| 65 | Valid Number | C++ | Easy |
| 64 | Minimum Path Sum | C++, Java | Medium |
| 63 | Unique Paths II | C++, Java | Medium |
| 62 | Unique Paths | C++, Java | Medium |
| 61 | Rotate List | C++ | Medium |
| 60 | Permutation Sequence | C++ | Medium |
| 59 | Spiral Matrix II | C++ | Medium |
| 58 | Length of Last Word | C++, Java | Easy |
| 57 | Insert Interval | C++ | Hard |
| 56 | Merge Intervals | C++ | Hard |
| 55 | Jump Game | C++, Python | Medium |
| 54 | Spiral Matrix | C++ | Medium |
| 53 | Maximum Subarray | C++, Java | Medium |
| 52 | N-Queens II | C++ | Hard |
| 51 | N-Queens | C++ | Hard |
| 50 | "Pow(x, n)" | C++, Java | Medium |
| 49 | Group Anagrams | C++ | Medium |
| 48 | Rotate Image | C++, Java | Medium |
| 47 | Permutations II | C++ | Hard |
| 46 | Permutations | C++ | Medium |
| 45 | Jump Game II | C++ | Hard |
| 44 | Wildcard Matching | C++ | Hard |
| 43 | Multiply Strings | C++ | Medium |
| 42 | Trapping Rain Water | C++ | Hard |
| 41 | First Missing Positive | C++, Python | Hard |
| 40 | Combination Sum II | C++ | Medium |
| 39 | Combination Sum | C++ | Medium |
| 38 | Count and Say | C++, Java | Easy |
| 37 | Sudoku Solver | C++ | Hard |
| 36 | Valid Sudoku | C++ | Easy |
| 35 | Search Insert Position | C++, Java | Medium |
| 34 | Search for a Range | C++, Java | Medium |
| 33 | Search in Rotated Sorted Array | C++, Java | Hard |
| 32 | Longest Valid Parentheses | C++ | Hard |
| 31 | Next Permutation | C++ | Medium |
| 30 | Substring with Concatenation of All Words | C++ | Hard |
| 29 | Divide Two Integers | C++ | Medium |
| 28 | Implement strStr() | C++, Java | Easy |
| 27 | Remove Element | C++ | Easy |
| 26 | Remove Duplicates from Sorted Array | C++, Java | Easy |
| 25 | Reverse Nodes in k-Group | C++ | Hard |
| 24 | Swap Nodes in Pairs | C++ | Medium |
| 23 | Merge k Sorted Lists | C++ | Hard |
| 22 | Generate Parentheses | C++ | Medium |
| 21 | Merge Two Sorted Lists | C++ | Easy |
| 20 | Valid Parentheses | C++ | Easy |
| 19 | Remove Nth Node From End of List | C++, Python | Easy |
| 18 | 4Sum | C++ | Medium |
| 17 | Letter Combinations of a Phone Number | C++ | Medium |
| 16 | 3Sum Closest | C++ | Medium |
| 15 | 3Sum | C++ | Medium |
| 14 | Longest Common Prefix | C++ | Easy |
| 13 | Roman to Integer | C++ | Easy |
| 12 | Integer to Roman | C++ | Medium |
| 11 | Container With Most Water | C++, Java | Medium |
| 10 | Regular Expression Matching | C++ | Hard |
| 9 | Palindrome Number | C++, Java | Easy |
| 8 | String to Integer (atoi) | C++ | Easy |
| 7 | Reverse Integer | C++ | Easy |
| 6 | ZigZag Conversion | C++ | Easy |
| 5 | Longest Palindromic Substring | C++ | Medium |
| 4 | Median of Two Sorted Arrays | C++ | Hard |
| 3 | Longest Substring Without Repeating Characters | C++ | Medium |
| 2 | Add Two Numbers | C++ | Medium |
| 1 | Two Sum | C++, Go | Easy |
LeetCode Shell
| # | Title | Solution | Difficulty |
|---|---|---|---|
| 4 | Tenth Line | Bash | Easy |
| 3 | Transpose File | Bash | Medium |
| 2 | Valid Phone Numbers | Bash | Easy |
| 1 | Word Frequency | Bash | Medium |
LintCode
| # | Title | Solution | Difficulty |
|---|---|---|---|
| 1 | Search in a big sorted array | Java | Medium |
| 2 | Search Range in Binary Search Tree | Java | Medium |
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FREQUENTLY ASKED
Quick answers
Does haoel/leetcode have a project website?
No homepage URL was recorded for haoel/leetcode in TopGit's last sync. The README tab above frequently contains screenshots and demo links, or check the repository description on GitHub.
Does haoel/leetcode have any tags?
TopGit's last sync did not record any GitHub topics for haoel/leetcode. GitHub topics appear in the right sidebar of a repository page; that's the authoritative place to check.
How active is development on haoel/leetcode?
The most recent commit recorded on haoel/leetcode was 2.8 years ago, based on the GitHub push timestamp. The repository has 4.9k forks — one of the better signals of community interest.
How many stars does haoel/leetcode have?
haoel/leetcode has 18.1k GitHub stars — refresh the page for the live number, or check github.com/haoel/leetcode. TopGit mirrors GitHub's count but does not claim minute-by-minute accuracy.
What language is haoel/leetcode written in?
haoel/leetcode is written primarily in C++. GitHub's language field is based on the largest share of bytes in the default branch.
Where do I read more about haoel/leetcode?
This TopGit page is a snapshot — the READ ME tab shows the project's own README content (links stripped, images preserved). The GitHub repository at github.com/haoel/leetcode is the definitive source.
Read full README in the tab above.
Is leetcode worth your time?
ChatGPT, Claude and Perplexity can all read this page. Ask one of them what it makes of leetcode.