#include <bits/stdc++.h>
using namespace std;
using ll=long long;

int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    
    ll N,M;
    cin>>N>>M;
    vector<ll> S(M,0);
    vector<vector<ll>> A(N,vector<ll>(M));
    for(int i=0;i<N;i++){
        for(int j=0;j<M;j++){
            cin>>A[i][j];
            S[j]+=A[i][j];
        }
    }
    vector<ll> D(N,0);
    for(int i=0;i<N;i++){
        for(int j=0;j<M;j++)D[i]+=S[j]*A[i][j];
    }
    sort(D.begin(),D.end());
    reverse(D.begin(),D.end());
    ll an=0;
    for(int i=0;i<N;i++){
        an+=D[i]*(1-(i%2)*2);
    }
    cout<<an<<endl;
}