package graph.bellmanford;
 
import java.util.Scanner;
 
public class BellmanFord {
    static node e[] = new node[210];
    static int dis[] = new int[110];
    static int n;
    static int m;
    static int cnt = 0;
 
    static {
        for (int i = 0; i < e.length; i++) {
            e[i] = new node();
        }
    }
 
    static void add(int a, int b, int w) {
        e[cnt].a = a;
        e[cnt].b = b;
        e[cnt++].w = w;
    }
 
    static boolean bellman_ford(int u) { // 求源點(diǎn) u 到其它頂點(diǎn)的最短路徑長(zhǎng)度，判負(fù)環(huán)
        for (int i = 0; i < dis.length; i++) {
            dis[i] = 0x3f;
        }
        dis[u] = 0;
        for (int i = 1; i < n; i++) { // 執(zhí)行 n-1 次
            boolean flag = false;
            for (int j = 0; j < m; j++) // 邊數(shù) m 或 cnt
                if (dis[e[j].b] > dis[e[j].a] + e[j].w) {
                    dis[e[j].b] = dis[e[j].a] + e[j].w;
                    flag = true;
                }
            if (!flag)
                return false;
        }
        for (int j = 0; j < m; j++) // 再執(zhí)行 1 次，還能松弛說明有環(huán)
            if (dis[e[j].b] > dis[e[j].a] + e[j].w)
                return true;
        return false;
    }
 
 
    static void print() { // 輸出源點(diǎn)到其它節(jié)點(diǎn)的最短距離
        System.out.println("最短距離：");
        for (int i = 1; i <= n; i++)
            System.out.print(dis[i] + " ");
        System.out.println();
    }
 
    public static void main(String[] args) {
        int a, b, w;
        Scanner scanner = new Scanner(System.in);
        n = scanner.nextInt();
        m = scanner.nextInt();
        for (int i = 0; i < m; i++) {
            a = scanner.nextInt();
            b = scanner.nextInt();
            w = scanner.nextInt();
            add(a, b, w);
        }
        if (bellman_ford(1)) // 判斷負(fù)環(huán)
            System.out.println("有負(fù)環(huán)！");
        else
            print();
    }
}
 
class node {
    int a;
    int b;
    int w;
}