PAT-1065 A+B and C (64bit)
作者:互联网
1065 A+B and C (64bit)
part 1, 1.1
自己解法(未全对)
- sum 如果溢出了,那么一定大于 2^63, 或者小于-2^63, 也就是一定是大于C或者小于C
- 看了好多,用cin输入的最后一个案例都WA
#include <iostream>
using namespace std;
int main()
{
long long A, B, C;
int n;
cin >> n;
for (int i = 1; i <= n; i++)
{
cin >> A >> B >> C;
cout << "Case #" << i << ": ";
long long sum = A + B;
if (A > 0 && B > 0 && sum < 0)
cout << "true" << endl;
else if (A < 0 && B < 0 && sum >= 0)
cout << "false" << endl;
else
{
if (sum > C)
cout << "true" << endl;
else
cout << "false" << endl;
}
}
system("pause");
return 0;
}
大神解法
- 柳神
- scanf神来之笔
#include <cstdio>
using namespace std;
int main() {
int n;
scanf("%d", &n);
for(int i = 0; i < n; i++) {
long long a, b, c;
scanf("%lld %lld %lld", &a, &b, &c);
long long sum = a + b;
if(a > 0 && b > 0 && sum < 0) {
printf("Case #%d: true\n", i + 1);
} else if(a < 0 && b < 0 && sum >= 0){
printf("Case #%d: false\n", i + 1);
} else if(sum > c) {
printf("Case #%d: true\n", i + 1);
} else {
printf("Case #%d: false\n", i + 1);
}
}
return 0;
}
总结
- cin与scanf的区别: 如果读取的数溢出,cin得到两数之间最大值,而scanf得到溢出后的值
标签:PAT,int,64bit,scanf,1065,long,#%,&&,sum 来源: https://blog.csdn.net/seven_colors/article/details/122803022