HDU 5655 CA Loves Stick

HDU 5655

注意long long 超范围和长度为0的情况。

#include <iostream>
#include <cstdlib>
#include <cstring>
#include <cstdio>
#include <cmath>
using namespace std;
int exam(long long a, long long b, long long c, long long d) {
	if(b + c < 0) return 1;
	if(c + d < 0) return 1;
	if(b + d < 0) return 1;
	if(b + c + d < 0) return 1;
	if(a < b + c + d) return 1;
	return 0;
}
int main() {
	int T;
	scanf("%d", &T);
	long long a, b, c, d;
	while(T--) {
		scanf("%I64d %I64d %I64d %I64d", &a, &b, &c, &d);
		if(a != 0 && b != 0 && c != 0 && d != 0 && exam(a, b, c, d) && exam(b, a, c, d) && exam(c, a, b, d) && exam(d, a, b, c)) {
			printf("Yes\n");
		}
		else printf("No\n");
	}
    return 0;
}