#include<bits/stdc++.h>
using namespace std;
ifstream f("flip.in");
ofstream g("flip.out");
int a[20][20],s1[20],s2[20],s3[20],s4[20];
int main()
{
    int n,m,s=0;
    f>>n>>m;
    for(int i=1;i<=n;++i)
    {
        for(int j=1;j<=m;++j)
        {
            f>>a[i][j];
            s+=a[i][j];
        }
    }
    for(int i=1;i<=n;++i){
        for(int j=1;j<=m;++j)
        {
            s1[i]+=a[i][j];
            s2[j]+=a[i][j];
            s3[i]-=a[i][j];
            s4[j]-=a[i][j];
        }
    }
    for(int i=1;i<=n;++i)
        if(s3[i]>s1[i])s=s-s1[i]+s3[i];
    for(int j=1;j<=m;++j)
        if(s4[j]>s2[j])s=s-s2[j]+s4[j];
    g<<s;
}