#include<stdio.h>

int a[100][100];
int main()
{
	int n, m, k, i, j,u,v,w;
	scanf("%d %d", &n, &m);
	for (i = 1; i <= n; i++)
	{
		for (j = 1; j <= n; j++)
		{
			if (i == j)
				a[i][j] = 0;
			else
			a[i][j] = 999999;
		}
	}
	for (i = 0; i < m; i++)
	{
		scanf("%d %d %d", &u, &v, &w);
		a[u][v] =a[v][u]=w;
	}
	for (k = 1; k <= n; k++)
		for (i = 1; i <= n; i++)
			for (j = 1; j <= n; j++)
				if ((i != j) && (i != k) && (j != k) && (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++)
		{
			printf("%d ", a[i][j]);
		}
		printf("\n");
	}
	return 0;
}