MatrDivImp1

#include <iostream>
using namespace std;
int a[101][101],m,n;

int sum(int l1,int c1,int l2,int c2)
{
    if(l2<l1||c2<c1)
        return 0;
    if(l1==l2&&c1==c2)
        if(a[l1][c1]%2==0)
            return a[l1][c1];
        else
            return 0;
    else
    {
        int lm=(l1+l2)/2;
        int cm=(c1+c2)/2;
        int s=0;
        s=s+sum(l1,c1,lm,cm);
        s=s+sum(l1,cm+1,lm,c2);
        s=s+sum(lm+1,c1,l2,cm);
        s=s+sum(lm+1,cm+1,l2,c2);
        return s;
    }
}

int main()
{
    cin>>m>>n;
    for(int i=1;i<=m;++i)
        for (int j=1;j<=n;++j)
            cin>>a[i][j];
    cout<<sum(1,1,m,n);
    return 0;
}