两行代码（bushi）

#include <cstdio>
int main(){int n,m,sum=0;scanf("%d %d",&n,&m);for(int i=1;i<=n&&i<=m;i++)sum+=(n-i+1)(m-i+1);printf("%d",sum);return 0;}
/

![](https://attach.acgo.cn/picture/95beda96f7ac401f9f95e8c1a27aec1d.jpg)

![](https://attach.acgo.cn/picture/7949ff3269d74ae8801413fa1cd31aa2.png)
*/