#include <iostream> #include <string> using namespace std; string zero=""; string one="#"; string two="##"; #define sz(x) ((int)x.size()) string solve(int x) { if(x==sz(one)) return "NO"; if(x==sz(two)) return "YES"; string i="##"; while(sz(i)<x) { if(x%sz(i)==sz(zero)) { return "NO"; } i.push_back('#'); } return "YES"; } int main() { int n; cin>>n; cout<<solve(n)<<endl; return zero.size(); }