#include <stdio.h>
int main() {
int e[10][10], k, j, n, m, t1, t2, t3;
int inf = 9999999;
scanf("%d%d", &n, &m);
//初始化
for (i = 1; i <= n; i++) {
for (j = 1; j <= n; j++) {
if (i == j) e[i][j] = 0;
else e[i][j] = inf;
}
}
//读入边
for (i = 1; i <= m; i++) {
scanf("%d%d%d",&t1, &t2, &t3);
e[t1][t2] = t3;
}
//Floyd-Warshall 算法核心语句
for (k = 1; k <= n; k++)
for (i = 1; i <= n; i++)
for (j = 1; j <= n; j++)
if (e[i][j] > e[i][k] + e[k][j])
e[i][j] = e[i][k] + e[k][j];
//输出最终的结果
for (i = 1; i <= n; i++){
for (j = 1; j <= n; j++) {
printf("%10d", e[i][j]);
}
printf("\n");
}
return 0;
}