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

void DFS(int src,int **mat,int *visited,int V ){
    printf("%d ",src);
    visited[src] = 1;
    for(int i=0;i<V;i++){
        if(mat[src][i] != 0 && visited[i] == 0){
            DFS(i, mat,visited,V);
        }
    }
}

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