@[xukeyu](/user/1239269)
不是 `<-2147483648` 吗？
`int` 类型的范围是 $-2147483648$ 到 $2147483647$
by LikablePie79015 @ 2024-08-20 09:50:09
@[LikablePie79015](/user/733515) o
by xukeyu @ 2024-08-20 09:51:43
```cpp
#include<iostream>
using namespace std;
long long x1,x2,y1,y2;
int main(){
cin>>x1>>x2>>y1>>y2;
if(x1*y1>2147483647||x1*y1<-2147483648||x2*y2>2147483647||x1*y1<-2147483648) cout<<"long long int";
else cout<<"int";
return 0;
}
by xukeyu @ 2024-08-20 09:52:38
应该写一个check函数去写好一点
by Diredtofu @ 2024-08-20 09:55:15
完了，落谷怎么发代码，我忘了
by Diredtofu @ 2024-08-20 09:57:13
@[xukeyu](/user/1239269)
但是还是不能 AC，HACK如下
```cpp
0 1000000000
-1000000000 0
```
by LikablePie79015 @ 2024-08-20 09:59:22
~~~~
bool check(long long num)
{
if (num <= 2147483647 && num >= -2147483648)
{
return true;
}
return false;
}
by Diredtofu @ 2024-08-20 10:00:57
@[xukeyu](/user/1239269)
乖乖枚举叭
```cpp
#include<iostream>
using namespace std;
long long x1,x2,y1,y2;
int main(){
cin>>x1>>x2>>y1>>y2;
if(x1*y1>2147483647||x1*y1<-2147483648||x2*y2>2147483647||x2*y2<-2147483648||
x1*y2>2147483647||x1*y2<-2147483648||x2*y1>2147483647||x2*y1<-2147483648) cout<<"long long int";
else cout<<"int";
return 0;
}
```
by LikablePie79015 @ 2024-08-20 10:01:55
@[xukeyu](/user/1239269) 主函数代码
~~~~
long long r = xu * yu;
long long l = xl * yl;
long long ll = xu * yl;
long long rr = xl * yu;
if (check(r) && check(l) && check(ll) && check(rr))
{
cout << "int" << endl;
}
else
{
cout << "long long int" << endl;
}
return 0;
~~****~~
by Diredtofu @ 2024-08-20 10:02:20
记得读入一下rl，ru;
yl, yu;
by Diredtofu @ 2024-08-20 10:03:04