uva 725 Division(除法) A - 暴力求解 Time Limit:3000MS Memory Limit:0KB 64bit IO Format:%lld & %llu Description Write a program that finds and displays all pairs of 5-digit numbers that between them use the digits 0 through 9 once each, such that
缩写原意: Overflow of = OV NV [No Overflow] Direction df = DN (decrement) UP (increment) Interrupt if = EI (enabled) DI (disabled) Sign sf = NG (negative) PL (positive) Zero zf = ZR [zero] NZ [ Not zero] Auxiliary Carry af = AC NA [ No AC ] Parity pf = P
题目 Square digit chains A number chain is created by continuously adding the square of the digits in a number to form a new number until it has been seen before. For example, 44 → 32 → 13 → 10 → 1 → 185 → 89 → 145 → 42 → 20 → 4 → 16 → 37 → 58 → 89 The
题目: Given an array of integers, find two numbers such that they add up to a specific target number. The function twoSum should return indices of the two numbers such that they add up to the target, where index1 must be less than index2. Please note t
题目链接 题目大意:给出一串数组,里面的数都是两个,只有一个数是一个,把这个只有一个的数找出来.时间复杂度最好是线性的,空间复杂度最好为O(1). 法一:利用map,空间换时间,代码如下(耗时26ms): public int singleNumber(int[] nums) { Map<Integer, Integer> map = new HashMap<Integer, Integer>(); int res = -1; for(int i = 0; i < nums.
一.不用额外变量交换两个整数的值 如果给定整数a和b,用以下三行代码即可交换a和b的值.a = a ^ b; b = a ^ b; a = a ^ b; a = a ^ b :假设a异或b的结果记为c,c就是a整数位信息和b整数位信息的所有不同信息.例如,a=4=100,b=3=011,a^b=c=000b = a ^ b :a异或c的结果就是b.比如a=4=100,c=000,a^c=011=3=b,也就是b = a ^ b ^ b = aa = a ^ b :b异或c的结果就是a.比如b=3