ACM一道题，一直wrong answer

#include#includeusing namespace std;int gongyue(int a, int b) // GCD写的不好，会TLE的{ while (b != 0) { unsigned r = a % b; a = b; b = r; } return a;}int gongbei(int a, int b) // LCM也不行{ return a / gongyue(a, b) * b;}int main(){ int a, b;