# include<iostream> using namespace std; int main(){ int score; cin>>score; if (score>=90){ cout<<"A"<<endl; } if (80<=score&&score<=89){ cout<<"B"<<endl; } if (70<=score&&score<=79){ cout<<"C"<<endl; } if (60<=score&&score<=69){ cout<<"D"<<endl; } if (score<60){ cout<<"E"<<endl; } return 0; }