a = input() if float(a)%30 and float(a)%50: print("YES") else: print("NO")

灰常难（

#include <iostream> using namespace std; int main() { int a; cin>>a; if(a%30&&a%50)cout<<"YES"; else cout<<"NO"; return 0; }

#include<bits/stdc++.h> using namespace std; int main(){ int n; cin>>n; if(n%30&&n%50){ cout<<"YES"; } else { cout<<"NO"; } return 0; }

#include<bits/stdc++.h> using namespace std; int main() { int n; cin>>n; if(n%30 && n%50) cout<<"YES"; else cout<<"NO"; return 0; }

#include <bits/stdc++.h> using namespace std; int n; int main (){ scanf("%d",&n); if(n%30&&n%50) cout<<"YES"; else cout<<"NO"; return 0; }

#include<bits/stdc++.h> using namespace std; int n; int main() { cin>>n; if(n%30 and n%50) cout<<"YES"; else cout<<"NO"; return 0; }