原题链接:https://www.patest.cn/contests/pat-a-practise/1065
1065. A+B and C (64bit) (20)
时间限制
100 ms
内存限制
65536 kB
代码长度限制
16000 B
判题程序
Standard
作者
HOU, Qiming
Given three integers A, B and C in [-263, 263], you are supposed to tell whether A+B > C.
Input Specification:
The first line of the input gives the positive number of test cases, T (<=10). Then T test cases follow, each consists of a single line containing three integers A, B and C, separated by single spaces.
Output Specification:
For each test case, output in one line "Case #X: true" if A+B>C, or "Case #X: false" otherwise, where X is the case number (starting from 1).
Sample Input:3 1 2 3 2 3 4 9223372036854775807 -9223372036854775808 0Sample Output:
Case #1: false Case #2: true Case #3: false
主要对于溢出情况做特殊判断
// pat_A+B and C (64bit).cpp : 定义控制台应用程序的入口点。 // #include <cstdio> #include <cstring> #include <cstdlib> #include <cmath> typedef long long ll; ll a, b, c, res; int main(int argc, char* argv[]) { int T,cas=1; scanf("%d", &T); while (T--) { int flag=1; scanf("%lld%lld%lld", &a, &b, &c); res = a + b; if (a < 0 && b < 0 && res>=0)//注意res==0也要包括 flag = 0; else if (a>0 && b > 0 && res <=0)//写成res< =0就错?? flag = 1; else if (res > c) flag = 1; else flag = 0; printf("Case #%d: %s\n", cas++, flag == 1 ? "true" : "false"); } return 0; }