Help me in solving COINS problem

help
,
1

My issue

can anyone help me in this question.I am not able to understand the problem, please.

My code

#include <iostream>
using namespace std;

int main() {
	// your code goes here
// 	int t;
// 	cin>>t;
// 	while(t--)
	
	   long n;
	   while(cin>>n){
	       
	   
	   if(n>=12)
	   {
	       cout<<n/2+n/3+n/4<<endl;
	   }
	   else
	   cout<<n<<endl;
	   }
	
	return 0;
}

Problem Link: COINS Problem - CodeChef