【TMD的陷阱题】HDU 2143 box
http://acm.hdu.edu.cn/showproblem.php?pid=2143注意三点：①分母为0②要先判定整除性③数比较大，要用int64
#include <iostream>using namespace std;#define L __int64bool isok (L a, L b, L c){if (a + b == c || a + c == b || b + c == a)return true;if (a - b == c || b - a == c || b - c == a || c - b == a || c - a == b || a - c == b)return true;if (a * b == c || a * c == b || b * c == a)return true;if (b != 0 && (a % b == 0 && a / b == c || c % b == 0 && c / b == a || c % b == a || a % b == c))return true;if (a != 0 && (b % a == 0 && b / a == c || c % a == 0 && c / a == b || c % a == b || b % a == c))return true;if (c != 0 && (a % c == 0 && a / c == b || b % c == 0 && b / c == a || a % c == b || b % c == a))return true;return false;}int main(){L a, b, c;while (~scanf ("%I64d%I64d%I64d", &a, &b, &c)){if (isok (a, b, c))puts ("oh,lucky!");else puts ("what a pity!");}return 0;}
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