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

int main(){
    int V,E,r,c,u,v,w,sorce;
    int itr;
    scanf("%d",&V);
    if(V<0){
        printf("Invalid input");
        return 0;
    }
    scanf("%d",&E);
    int **mat;
    int *visited;
    mat=(int**)malloc(sizeof(int*));
    for(r=0;r<V;r++)
        mat[r]=(int*)malloc(sizeof(int));
    for(itr=1;itr<E;itr++){
        scanf("%d",&u);
        scanf("%d",&v);
        scanf("%d",&w);
        mat[u][v]=w;
    }
    scanf("%d",&source);
    visited=(int*)malloc(sizeof(int));
    printf("DFS Traversal starting from vertex %d",source);
    dfs(source,mat,visited,V);
    return 0;
    
}

void dfs(int source,int **mat,int *visited,int V){
    printf("%d",source);
    visited[source]=1;
    for(int itr=0;itr<V;itr++){
        if(mat[source][itr]!=0 && visited[itr]==0)
        dfs(itr,mat,visited,v);
    }
}