#include <fstream>

using namespace std;

ifstream fin("filip.in");
ofstream fout("filip.out");

int N, M;
int A[20][20];
int X[20];
int MSum;

void Read()
{
    fin >> N >> M;

    for (int i = 1; i <= N; i++)
        for (int j = 1; j <= M; j++)
            fin >> A[i][j];
}

void Solve()
{
    int Sum = 0;

    for (int j = 1; j <= M; j++)
    {
        int s = 0;
        for (int i = 1; i <= N; i++)
            s += A[i][j] * X[i];
        if (s < 0)
            s *= -1;
        Sum += s;
    }
    if (Sum > MSum) {
        MSum = Sum;
    }
}

void Back(int l)
{
    for (int i = -1; i <= 1; i += 2)
    {
        X[l] = i;
        if (l == N)
            Solve();
        else
            Back(l + 1);
    }
}

int main()
{
    Read();
    Back(1);
    fout << MSum;
    return 0;
}