模板[中国剩余定理]

//chu是除数，yu是余数//注意只适用于除数两两互质#include<iostream> #include<queue> using namespace std; int extended_euclid(int a, int b, int &x, int &y) { int d; if(b == 0) {x = 1; y = 0; return a;} d = extended_euclid(b, a % b, y, x); y -= a / b * x; return d;}int chinese_remainder(int b[], int w[], int len) { int i, d, x, y, m, n, ret; ret = 0; n = 1; for(i=0; i < len ;i++) n *= w[i]; for(i=0; i < len ;i++) { m = n / w[i]; d = extended_euclid(w[i], m, x, y); ret = (ret + y*m*b[i]) % n; } return (n + ret%n) % n;}int yu[100],chu[100];int main(){int n;while(scanf("%d",&n)!=EOF){for(int i=0;i<n;i++){cin>>chu[i]>>yu[i];}int ans=chinese_remainder(yu,chu,n);printf("%d/n",ans);}}