Luogu P2241 Statistical Square (Data Enhanced Edition) Problem Solution

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Said to be an enhanced version, in fact, you can paste the code of the chessboard question (be careful to open long long):

#include<bits/stdc++.h>
using namespace std;
long long n,m,z=0,c;
int main(){
    cin>>n>>m;
    for(long long i=0;i<(n>m?m:n);++i) z+=(n-i)*(m-i);
    c=(1+n)*(1+m)*n*m/4-z;
    cout<<z<<" "<<c<<endl;
    return 0;
}