#include using namespace std; int main(){ int a; cin >> a; if(a>=85&&a<=100){ cout<<"A"; } if(a>=75&&a<=84.5){ cout<<"B"; } if(a>=60&&a<=74.5){ cout<<"C"; } if(a>=30&&a<=59.5){ cout<<"D"; } if(a>=0&&a<=29.5){ cout<<"E"; } return 0; }