想清楚一些。
```
#include <bits/stdc++.h>
using namespace std;
long long a,b,x,y;
int main()
{
cin>>a>>b>>x>>y;
if(1LL*b*x>2147483647||1LL*b*x<-2147483648||1LL*a*y>2147483647||1LL*a*y<-2147483648||1LL*a*x>2147483647||1LL*a*x<-2147483648||1LL*b*y>2147483647||1LL*b*y<-2147483648)//-2147483648也是int，当a=-2147483648,b=0,x=0,y=2147482647时，你的原来代码不对
{
cout<<"long long int"<<endl;
}
else
{
cout<<"int"<<endl;
}
return 0;
}
```
by sbno333 @ 2024-01-28 22:04:53
加了下限乘上限和上限乘下线之后100，但是#101
[没过](https://www.luogu.com.cn/record/144895603)
by lzj20110120 @ 2024-01-28 22:08:19
又一个被我hack的hh
by cff_0102 @ 2024-01-28 22:10:15
写简单点（[供参考](https://www.luogu.com.cn/record/144897204)
by HeYilin @ 2024-01-28 22:21:10