#include <bits/stdc++.h>

using namespace std;

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

int a[105][105], n, m;

int main()
{
    int i, j, k, x, y, c;
    fin >> n >> m;
    for(i = 1; i <= n; i++)
        for(j = 1; j <= n; j++)
            if(i != j)
               a[i][j] = 1e9;
    for(i = 1; i <= m; i++)
    {
        fin >> x >> y >> c;
        a[x][y] = c;
    }
    for(k = 1 ; k <= n ; k++)
        for(i = 1 ; i <= n ; i++)
            for(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(i = 1; i <= n; i++)
    {
        for(j = 1; j <= n; j++)
            if(a[i][j] == 1e9)
                fout << "-1 ";
            else
                fout << a[i][j] << " ";
        fout << "\n";
    }
    return 0;
}