#include <fstream>
#include <iostream>
#include <climits>
using namespace std;
ifstream in("flip.in");
ofstream out("flip.out");
int main()
{
    int a[16][16];
    int n, m, ossz = 0, min = INT_MAX;
    in >> n >> m;
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            in >> a[i][j];
            ossz += a[i][j];
        }
        if (ossz < 0) {
            for (int j = 0; j < m; j++) {
                a[i][j] = -a[i][j];
            }
        }
        ossz = 0;
    }
    for (int i = 0; i < m; i++) {
        for (int j = 0; j < n; j++) {
            ossz += a[j][i];
        }
        if (ossz < 0) {
            for (int j = 0; j < n; j++) {
                a[j][i] = -a[j][i];
            }
        }
    }
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            out << a[i][j] << " ";
        }
        out << "\n";
    }
    return 0;
}