用户输入一个年份,判断这个年是否是闰年.判断闰年条件:① 非整百年数除以4,无余为闰,有余不闰:② 整百年数除以400,无余为闰,有余不闰.比如:2000年,整百数年,就要用②公式,除以400,无余数,所以是闰年.1900年,整百年数,就要用②公式,除以400,有余数,所以不是闰年. // 用户输入两个数字 var year = parseFloat(prompt("请输入一个年份",2016)); //闰年:要么整百年份能够被400整除(能够被400整除,肯定能被100整除),要么非
题目 Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have exactly one solution, and you may not use the same element twice. Example: Given nums = [2, 7, 11,
Adding two numbers concatenates them instead of calculating the sum JavaScript里两个变量 var a = 2: var b = 1: var c = "(" + a + b +")"; alert(c); 结果输出:(21) 正确写法: var c = + a + + b: var d = "(" + c +")";
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <script type="text/javascript"> var num = 4;//每个子数组里的元素个数 var arr = [1,4,5,6,34,34,67,895,2456,87,9,5,23,884,56]; var Arr = new Arra
题目描述:给定一个二叉搜索树和一个目标结果,如果 BST 中存在两个元素且它们的和等于给定的目标结果,则返回 true. 解题思路:根据二叉搜索树的特点,对二叉搜索树进行中序遍历可以得到一个从小到达排列的列表,进而将该问题转换为“两数之和Ⅰ”,用双指针或者哈希表求解 因而这题的关键在于,二叉树中序遍历算法. # Definition for a binary tree node. # class TreeNode: # def __init__(self, x): # self.val = x
$(function () { var starttime = transdate("2014-09-30 15:53:00"); var endtime = transdate("2014-10-03 15:53:00"); var now = "'"+new Date().getTime()+"'"; var nowtime = now.substr(1,10); if(nowtime