求改正：

#include <bits/stdc++.h>
long long xl, xu, yl, yu;
int main(){
	scanf("%lld%lld%lld%lld", &xl, &xu, &yl, &yu);
	int a = xl, b = xu, c = yl, d = yu;
	if(xl * xu != a * b || c * d != yu * yl || xl * yl != a * c 
		|| xu * yu != b * d || a * d != xl * yu || b * c != xu * yl){
		printf("long long int\n");
	}else printf("int\n");
	return 0;
}