#include<iostream> using namespace std; int main(){ int bh; cin>>bh; switch(bh){ case 1: cout<<"NO"; break; case 2: cout<<"YES"; break; case 3: cout<<"NO"; break; case 4: cout<<"YES"; break; case 5: cout<<"NO"; break; case 6: cout<<"YES"; break; case 7: cout<<"YES"; break; } }