Graph Representation with stl list

#include <stdio.h>
#include <list>
using namespace std;
int main(int argc, const char * argv[]) {
    int v,e;
    scanf("%d%d",&v,&e);
    list<int> graph[1000];
    int st,en;
    for(int i=0;i<e;i++){
        scanf("%d%d",&st,&en);
        graph[st].push_back(en);
        graph[en].push_back(st);
    }
    for(int i=0;i<v;i++){
        printf("%d : ",i);
        for(list<int>::iterator it = graph[i].begin(); it != graph[i].end(); ++it){
            printf("%d ",*it);
        }
        printf("\n");
    }
    return 0;
}