Power of Two /** * LeetCode: Power of Two * Given an integer, write a function to determine if it is a power of two. * * @author LuoPeng * @time 2015.8.3 * */ public class PowerOfTwo { public boolean isPowerOfTwo(int n) { boolean result = false; if (…
[Q4] There are two sorted arrays nums1 and nums2 of size m and n respectively. Find the median of the two sorted arrays. The overall run time complexity should be O(log (m+n)). You may assume nums1 and nums2 cannot be both empty. Example 1: nums1 = […
今天数模比赛爆肝&操作系统大作业 脖子疼orz先把题过了保证flag不倒..个别细节回头看吧 Num 13 罗马数字转整数 Roman to Integer 一遍提交过,开始编译出了点问题 具体:最开始忘了if后面的(a+1)需要括号 strlen(s)不可用,这个回头看一下 s.length()是可用的 不知道有没有简单代码,困到懵逼先码 class Solution { public: bool pd=false; int num(char*a) { pd=false;//在true的时候减…
Find the length of the longest substring T of a given string (consists of lowercase letters only) such that every character in T appears no less than k times. Example 1: Input: s = "aaabb", k = 3 Output: 3 The longest substring is "aaa"…
题目链接:Path Sum II | LeetCode OJ 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 = 22, 5 / \ 4 8 / / \ 11 13 4 / \ / \ 7 2 5 1 return [ [5,4,11,2],…
题目链接:Path Sum | LeetCode OJ 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. For example: Given the below binary tree and sum = 22, 5 / \ 4 8 / / \ 11…
题目链接:Balanced Binary Tree | LeetCode OJ Given a binary tree, determine if it is height-balanced. For this problem, a height-balanced binary tree is defined as a binary tree in which the depth of the two subtrees of every node never differ by more tha…
