设 ans 为满足前 n - 1个同余方程的解,lcm是前n - 1个同余方程模的最小公倍数,求前n个同余方程组的解的过程如下: ①设lcm * x + ans为前n个同余方程组的解,lcm * x + ans一定能满足前n - 1个同余方程: ②第 n 个同余方程可以转化为a[n] * y + b; 合并①②得:lcm * x + ans = a[n] * y + b; => lcm * x - a[n] * y = b - ans(可以用拓展欧几里得求解x和y) 但是拓展欧几里得要求取余的数…
http://acm.hdu.edu.cn/showproblem.php?pid=1573 求小于等于N的正整数中有多少个X满足: X mod a0 = b0 X mod a1 = b1 …… X mod ai = bi (0<ai<=10) 输入:第一行为一个正整数T,表示有T组测试数据.每组测试数据的第一行为两个正整数N,M (0 < N <= 1000,000,000 , 0 < M <= 10),表示X小于等于N,数组a和b中各有M个元素.接下来两行,每行各有…
Description Elina is reading a book written by Rujia Liu, which introduces a strange way to express non-negative integers. The way is described as following: Choose k different positive integers a1, a2, …, ak. For some non-negative m, divide it by ev…
ZOJ Problem Set - 3593 http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemCode=3593 One Person Game Time Limit: 2 Seconds Memory Limit: 65536 KB There is an interesting and simple one person game. Suppose there is a number axis under your f…