#include <fstream>

#define INF 0x3F3F3F3F

using namespace std;

ifstream cin ("roy-floyd.in");
ofstream cout ("roy-floyd.out");

int main ()
{
    int n, m;
    cin >> n >> m;
    int a[101][101];

    for (int i = 1; i <= n; i++)
    {
        for (int j = 1; j <= n; j++)
        {
            if (i == j)
            {
                a[i][j] = 0;
            }
            else
            {
                a[i][j] = INF;
            }
        }
    }

    int x, y, c;

    while (m--)
    {
        cin >> x >> y >> c;
        a[x][y] = c;
    }

    for (int k = 1; k <= n; k ++)
        for (int i = 1; i <= n; i ++)
            for (int j = 1; j <= n; j ++)
                if (a[i][j] > a[i][k] + a[k][j])
                    a[i][j] = a[i][k] + a[k][j];

    for (int i = 1 ; i <= n ; i ++)
    {
        for (int j = 1 ; j <= n ; j ++)
        {
            if (a[i][j] == INF)
                cout << -1 << ' ';
            else
                cout << a[i][j] << ' ';

        }

        cout << '\n';
    }

}