0200 - 0299
Solutions categorised by Problem IDs
0200 - Number of Islands (Medium)Author: @wkw, @ColeB2 | https://leetcode.com/problems/number-of-islands/0202 - Happy Number (Easy)Author: @vigneshshiv, @wkw | https://leetcode.com/problems/happy-number/0204 - Count PrimesAuthor: @wkw | https://leetcode.com/problems/count-primes/0205 - Isomorphic Strings (Easy)Author: @wkw, @vigneshshiv, @radojicic23 | https://leetcode.com/problems/isomorphic-strings/0206 - Reverse Linked List (Easy)Author: @vigneshshiv, @radojicic23 | https://leetcode.com/problems/reverse-linked-list/0207 - Course Schedule (Medium)Author: @wkw | https://leetcode.com/problems/course-schedule/0208 - Implement Trie (Prefix Tree) (Medium)Author: @vigneshshiv | https://leetcode.com/problems/implement-trie-prefix-tree/0210 - Course Schedule II (Medium)Author: @wkw | https://leetcode.com/problems/course-schedule-ii/0211 - Design Add and Search Words Data Structure (Medium)Author: @ColeB2 | https://leetcode.com/problems/design-add-and-search-words-data-structure/0212 - Word Search II (Hard)Author: @ColeB2 | https://leetcode.com/problems/word-search-ii/0213 - House Robber II (Medium)Author: @ColeB2 | https://leetcode.com/problems/house-robber-ii/0214 - Shortest Palindrome (Hard)Author: @wkw | https://leetcode.com/problems/shortest-palindrome/0215 - Kth Largest Element in an Array (Medium)Author: @wkw, @ColeB2, @jit | https://leetcode.com/problems/kth-largest-element-in-an-array/0217 - Contains Duplicate (Easy)Author: @DoubleSpicy, @vigneshshiv, @radojicic23 | https://leetcode.com/problems/contains-duplicate/0219 - Contains Duplicate II (Easy)Author: @wkw | https://leetcode.com/problems/contains-duplicate-ii/0225 - Implement Stack using Queues (Easy)Author: @wkw | https://leetcode.com/problems/implement-stack-using-queues0226 - Invert Binary Tree (Easy)Author: @ColeB2, @radojicic23 | https://leetcode.com/problems/invert-binary-tree/0228 - Summary Ranges (Easy)Author: @wkw | https://leetcode.com/problems/summary-ranges/0230 - Kth Smallest Element in a BST (Medium)Author: @ColeB2, @radojicic23 | https://leetcode.com/problems/kth-smallest-element-in-a-bst/0231 - Power of Two (Easy)Author: @wkw, @vigneshshiv, @radojicic23, @jit | https://leetcode.com/problems/power-of-two/0234 - Palindrome Linked List (Easy)Author: @wkw, @vigneshshiv, @radojicic23 | https://leetcode.com/problems/palindrome-linked-list/0235 - Lowest Common Ancestor of a Binary Search Tree (Medium)Author: @ColeB2, @radojicic23 | https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-search-tree/0237 - Delete Node in a Linked List (Medium)Author: @heder | https://leetcode.com/problems/delete-node-in-a-linked-list/0238 - Product of Array Except Self (Medium)Author: @DongDong | https://leetcode.com/problems/product-of-array-except-self/0239 - Sliding Window Maximum (Hard)Author: @ColeB2 | https://leetcode.com/problems/sliding-window-maximum/0242 - Valid Anagram (Easy)Author: @wkw, @vigneshshiv, @radojicic23, @jit | https://leetcode.com/problems/valid-anagram/0246 - Strobogrammatic Number (Easy)Author: @wkw | https://leetcode.com/problems/strobogrammatic-number/0258 - Add Digits (Easy)Author: @wkw | https://leetcode.com/problems/add-digits/0261 - Graph Valid Tree (Medium)Author: @wkw | https://leetcode.com/problems/graph-valid-tree/0263 - Ugly NumberAuthor: @Ishwarendra | https://leetcode.com/problems/ugly-number/0268 - Missing Number (Easy)Author: @wkw, @vigneshshiv, @radojicic23 | https://leetcode.com/problems/missing-number/0278 - First Bad Version (Easy)Author: @wkw, @radojicic23 | https://leetcode.com/problems/first-bad-version/0283 - Move Zeroes (Easy)Author: @heiheihang, @vigneshshiv, @radojicic23 | https://leetcode.com/problems/move-zeroes/0286 - Walls and Gates (Medium)Author: @wkw | https://leetcode.com/problems/walls-and-gates/0287 - Find the Duplicate Number (Medium)Author: @wkw, @vigneshshiv, @radojicic23 | https://leetcode.com/problems/find-the-duplicate-number/0290 - Word Pattern (Easy)Author: @wkw | https://leetcode.com/problems/word-pattern/0295 - Find Median from Data Stream (Hard)Author: @ColeB2 | https://leetcode.com/problems/find-median-from-data-stream/0297 - Serialize and Deserialize Binary Tree (Hard)Author: @ColeB2 | https://leetcode.com/problems/serialize-and-deserialize-binary-tree/0298 - Binary Tree Longest Consecutive Sequence (Medium)Author: @wkw | https://leetcode.com/problems/binary-tree-longest-consecutive-sequence/0299 - Bulls and Cows (Medium)Author: @dhanu084 | https://leetcode.com/problems/bulls-and-cows/