#include<bits/stdc++.h> using namespace std; int main() { int a; cin>>a; if(a<10) { cout<<"A"<<endl; }else if(a>=10&&a<20) { cout<<"B"<<endl; } else if(a>=20&&a<40) { cout<<"C"<<endl; }else if(a>=40&&a<50) { cout<<"D"<<endl; }else if(a>=50&&a<80) { cout<<"E"<<endl; } return 0; } /************************************************************** Problem: 1044 User: lzc Language: C++ Result: Accepted Time:10 ms Memory:2072 kb ****************************************************************/