nefu115数的整除性

http://acm.nefu.edu.cn/test/problemshow.php?problem_id=115

#include<iostream>
#include<cstdio>
#include<cstring>
#include<cmath>
#include<algorithm>
#include<bitset>
#include<iomanip>

using namespace std;

int main()
{
	int n ; 
	while( scanf( "%d" , &n ) != EOF )
	{
		if( n % 12 == 0 )
			printf( "YES\n" ) ;
		else
		{
			if( n % 4 == 0 )
				printf( "3\n" ) ;
			else 
			{
				if( n % 6 == 0 )
					printf( "4\n" ) ;
				else
					printf( "NO\n" ) ;
			}
		} 
	}
	return 0 ;
}