LeetCode 解答・解説 記事一覧【日本語】

 

LeetCodeを始める前に

• 解答前に知っておくと役に立つかもしれない情報

 

LeetCodeの問題分類

• LeeetCodeの問題をアルゴリズムとデータ構造による分類

同じテーマの問題を続けて解いた方が定着しやすい気がします。

 

各問題の解答・解説

• 1.Two Sum
• 9. Palindrome Number
• 13. Roman to Integer
• 14. Longest Common Prefix
• 20. Valid Parentheses
• 26. Remove Duplicates from Sorted Array
• 27.Remove Element
• 35. Search Insert Position
• 58. Length of Last Word
• 67. Add Binary
• 70. Climbing Stairs
• 100. Same Tree
• 101. Symmetric Tree
• 108. Convert Sorted Array to Binary Search Tree
• 110. Balanced Binary Tree
• 111. Minimum Depth of Binary Tree
• 112. Path Sum
• 118. Pascal’s Triangle
• 119. Pascal’s Triangle II
• 136. Single Number
• 141. Linked List Cycle
• 217. Contains Duplicate
• 876. Middle of the Linked List
• 1290. Convert Binary Number in a Linked List to Integer
• 1232. Check If It Is a Straight Line
• 2. Add Two Numbers
• 61. Rotate List
• 82. Remove Duplicates from Sorted List II
• 114. Flatten Binary Tree to Linked List
• 268. Missing Number
• 704. Binary Search
• 3. Longest Substring Without Repeating Characters
• 12. Integer to Roman
• 5. Longest Palindromic Substring
• 6. Zigzag Conversion
• 7. Reverse Integer
• 278. First Bad Version
• 11. Container With Most Water
• 15. 3Sum
• 977. Squares of a Sorted Array
• 283. Move Zeroes
• 167. Two Sum II – Input Array Is Sorted
• 344. Reverse String
• 19. Remove Nth Node From End of List
• 567. Permutation in String
• 733. Flood Fill
• 695. Max Area of Island
• 617. Merge Two Binary Trees
• 77. Combinations
• 46. Permutations
• 74. Search a 2D Matrix
• 153. Find Minimum in Rotated Sorted Array
• 844. Backspace String Compare
• 986. Interval List Intersections
• 200. Number of Islands
• 40. Combination Sum II
• 17. Letter Combinations of a Phone Number
• 55. Jump Game
• 45. Jump Game II
• 62. Unique Paths
• 413. Arithmetic Slices
• 300. Longest Increasing Subsequence
• 2351. First Letter to Appear Twice
• 107. Binary Tree Level Order Traversal II
• 637. Average of Levels in Binary Tree
• 202. Happy Number
• 1523. Count Odd Numbers in an Interval Range
• 1491. Average Salary Excluding the Minimum and Maximum Salary
• 1480. Running Sum of 1d Array
• 724. Find Pivot Index
• 205. Isomorphic Strings
• 191. Number of 1 Bits
• 1281. Subtract the Product and Sum of Digits of an Integer
• 404. Sum of Left Leaves
• 350. Intersection of Two Arrays II
• 121. Best Time to Buy and Sell Stock
• 21. Merge Two Sorted Lists