2024-2-28-1205-买不到的数目.cpp

2024-2-28-1205-买不到的数目.cpp

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#include<iostream>
#include<cstdio>
#include<cstring>
#include<algorithm>
using namespace std;
int main()
{
int n,m;
cin>>n>>m;
cout<<(n-1)*(m-1)-1;
return 0;

}