241105-11404.java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

public class Main {

    static int n;
    static int m;

    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        n = Integer.parseInt(br.readLine());
        m = Integer.parseInt(br.readLine());
        int arr[][] = new int[n + 1][n + 1];
        for (int i = 1; i <= n; i++) {
            for (int j = 1; j <= n; j++) {
                arr[i][j] = Integer.MAX_VALUE;
            }
        }
        for (int i = 1; i <= n; i++) {
            arr[i][i] = 0;
        }
        for (int i = 0; i < m; i++) {
            StringTokenizer st = new StringTokenizer(br.readLine());
            int a = Integer.parseInt(st.nextToken());
            int b = Integer.parseInt(st.nextToken());
            int c = Integer.parseInt(st.nextToken());
            arr[a][b] = Math.min(arr[a][b], c);
        }
        br.close();
        for (int k = 1; k <= n; k++) {
            for (int i = 1; i <= n; i++) {
                for (int j = 1; j <= n; j++) {
                    if (arr[i][k] != Integer.MAX_VALUE && arr[k][j] != Integer.MAX_VALUE) {
                        arr[i][j] = Math.min(arr[i][j], arr[i][k] + arr[k][j]);
                    }
                }
            }
        }

        StringBuilder sb = new StringBuilder();
        for (int i = 1; i <= n; i++) {
            for (int j = 1; j <= n; j++) {
                sb.append(arr[i][j] == Integer.MAX_VALUE ? 0 : arr[i][j]).append(" ");
            }
            sb.append('\n');
        }
        System.out.print(sb);
    }
}