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2018年3月20日

[LeetCode] 230. Kth Smallest Element in a BST 二叉搜索树中的第K小的元素

摘要： Given a binary search tree, write a function kthSmallest to find the kth smallest element in it. Note: You may assume k is always valid, 1 ≤ k ≤ BST's 阅读全文

posted @ 2018-03-20 02:30 轻风舞动阅读(841) 评论(0) 推荐(0)

[LeetCode] 666. Path Sum IV 二叉树的路径和 IV

摘要： If the depth of a tree is smaller than 5, then this tree can be represented by a list of three-digits integers. For each integer in this list: Given a 阅读全文

posted @ 2018-03-20 02:00 轻风舞动阅读(717) 评论(0) 推荐(0)

2018年3月19日

[LeetCode] 437. Path Sum III 路径和 III

摘要： You are given a binary tree in which each node contains an integer value. Find the number of paths that sum to a given value. The path does not need t 阅读全文

posted @ 2018-03-19 03:36 轻风舞动阅读(526) 评论(0) 推荐(0)

2018年3月17日

[LeetCode] 113. Path Sum II 路径和 II

摘要： Given a binary tree and a sum, find all root-to-leaf paths where each path's sum equals the given sum. For example:Given the below binary tree and sum 阅读全文

posted @ 2018-03-17 14:20 轻风舞动阅读(364) 评论(0) 推荐(0)

[LeetCode] 112. Path Sum 路径和

摘要： Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values along the path equals the given sum. F 阅读全文

posted @ 2018-03-17 13:22 轻风舞动阅读(1029) 评论(0) 推荐(0)

[LeetCode] 79. Word Search 单词搜索

摘要： Given a 2D board and a word, find if the word exists in the grid. The word can be constructed from letters of sequentially adjacent cell, where "adjac 阅读全文

posted @ 2018-03-17 07:51 轻风舞动阅读(1466) 评论(0) 推荐(0)

[LeetCode] 90. Subsets II 子集合 II

摘要： Given a collection of integers that might contain duplicates, nums, return all possible subsets (the power set). Note: The solution set must not conta 阅读全文

posted @ 2018-03-17 07:36 轻风舞动阅读(238) 评论(0) 推荐(0)

[LeetCode] 78. Subsets 子集合

摘要： Given a set of distinct integers, nums, return all possible subsets (the power set). Note: The solution set must not contain duplicate subsets. For ex 阅读全文

posted @ 2018-03-17 07:30 轻风舞动阅读(310) 评论(0) 推荐(0)

[LeetCode] 68. Text Justification 文本对齐

摘要： Given an array of words and a length L, format the text such that each line has exactly L characters and is fully (left and right) justified. You shou 阅读全文

posted @ 2018-03-17 07:21 轻风舞动阅读(500) 评论(0) 推荐(0)

[LeetCode] 69. Sqrt(x) 求平方根

摘要： Implement int sqrt(int x). Compute and return the square root of x. 求一个数的平方根。解法：二分法，迭代循环在x范围内找中间值mid，然后判断mid * mid和x，如果mid > x/mid（不要写成middle*middle= 阅读全文

posted @ 2018-03-17 06:26 轻风舞动阅读(1223) 评论(0) 推荐(0)

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