#include <stdio.h>
#include <stdlib.h>

int main() {
    int n, m;
    if (scanf("%d %d", &n, &m) != 2 || n < 1 || n > 100) {
        printf("Invalid input\n");
        return 0;
    }

    int matrix = {0};

    for (int i = 0; i < m; i++) {
        int u, v, w;
        if (scanf("%d %d %d", &u, &v, &w) != 3) {
            printf("Invalid input\n");
            return 0;
        }
        if (u < 1 || u > n || v < 1 || v > n || w < 0) {
            printf("Invalid input\n");
            return 0;
        }
        matrix[u-1][v-1] = w;
    }

    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            printf("%d", matrix[i][j]);
            if (j < n-1) printf(" ");
        }
        printf("\n");
    }

    return 0;
}