UVA 11388 GCD LCM——gcd lcm性质

输入两个数x y如果y % x不等于0输出-1， 否则输出x y

#include <cstdio>using namespace std;int main() {    int T; scanf("%d", &T);    for (int kase = 1; kase <= T; kase++) {        int a, b;        scanf("%d %d", &a, &b);        if (b % a == 0) printf("%d %d\n", a, b);        else printf("-1\n");    }    return 0;}