茜茜的技术空间

2015年9月22日

摘要： Given an array of integers and an integerk, find out whether there are two distinct indicesiandjin the array such thatnums[i] = nums[j]and the differe... 阅读全文

posted @ 2015-09-22 01:14 茜茜的技术空间阅读(131) 评论(0) 推荐(0)

Leetcode Contains Duplicate

摘要： Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in the arr... 阅读全文

posted @ 2015-09-22 00:53 茜茜的技术空间阅读(128) 评论(0) 推荐(0)

2015年9月17日

Leetcode Closest Binary Search Tree Value

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posted @ 2015-09-17 03:41 茜茜的技术空间阅读(1) 评论(0) 推荐(0)

Leetcode Binary Tree Paths

摘要： Given a binary tree, return all root-to-leaf paths.For example, given the following binary tree: 1 / \2 3 \ 5All root-to-leaf paths are:["1->... 阅读全文

posted @ 2015-09-17 02:52 茜茜的技术空间阅读(153) 评论(0) 推荐(0)

Leetcode Lowest Common Ancestor of a Binary Tree

摘要： Given a binary tree, find the lowest common ancestor (LCA) of two given nodes in the tree.According to thedefinition of LCA on Wikipedia: “The lowest ... 阅读全文

posted @ 2015-09-17 01:53 茜茜的技术空间阅读(1186) 评论(0) 推荐(0)

Leetcode Lowest Common Ancestor of a Binary Search Tree

摘要： Given a binary search tree (BST), find the lowest common ancestor (LCA) of two given nodes in the BST.According to thedefinition of LCA on Wikipedia: ... 阅读全文

posted @ 2015-09-17 00:54 茜茜的技术空间阅读(142) 评论(0) 推荐(0)

Leetcode Path Sum

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.Fo... 阅读全文

posted @ 2015-09-17 00:11 茜茜的技术空间阅读(140) 评论(0) 推荐(0)

2015年9月16日

Leetcode Symmetric Tree

摘要： Given a binary tree, check whether it is a mirror of itself (ie, symmetric around its center).For example, this binary tree is symmetric: 1 / \ ... 阅读全文

posted @ 2015-09-16 02:18 茜茜的技术空间阅读(132) 评论(0) 推荐(0)

2015年9月14日

Leetcode Invert Binary Tree

摘要： Invert a binary tree. 4 / \ 2 7 / \ / \1 3 6 9to 4 / \ 7 2 / \ / \9 6 3 1解题思路：方法一： recursion 交换当前左右节点，并直接调用递归即可方... 阅读全文

posted @ 2015-09-14 03:02 茜茜的技术空间阅读(117) 评论(0) 推荐(0)

Leetcode Same Tree

摘要： Given two binary trees, write a function to check if they are equal or not.Two binary trees are considered equal if they are structurally identical an... 阅读全文

posted @ 2015-09-14 02:07 茜茜的技术空间阅读(108) 评论(0) 推荐(0)

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