OJ Board

Accepted????Why?

this is my code:
#include <iostream>
#include <stdio.h>
#include <string.h>
using namespace std;
int a[10000]={1,1};
int b[5]={1,5,10,25,50};
int main()
{
int i,j;
for(i=0;i<5;i++)
{
for(j=2;j<10000;j++)
{
if(j>=b[i])
a[j]+=a[j-b[i]];
}
}
int n;
while(scanf("%d",&n ...