OJ Board

My c++programme gave this result just as follow.
0: 0
1: 1 2
2:
3:
4:
5: 5 4 6
6:
7: 8 7 9 3
8:
9:
10: 10 11 12
11:
12:
13: 13
14: 14 17
15: 15
16: 16
17:
18: 18
here is my coded:
#include "stdafx.h"
#include<iostream>
#include<stdlib.h>
#include<string.h>
using namespace std ...