代码解题

#include <iostream>
using namespace std;
int main (){
int a,b,c,n,sum=0;
cin>>n;
sum=n;
c=sum%10;
sum/=10;
b=sum%10;
sum/=10;
a=sum%10;
if(aaa+bbb+ccc==n){
cout<<"YES";
}else{
cout<<"NO";
}
return 0;
}