#include<iostream>
using namespace std;
class shape {
    public;
    
};
int main(){
    float d1 , d2 ;
    string shapee ;
    cin>>shapee;
    if (shapee == "circle" || shapee=="rectangle"){
        if (shapee == "circle"){
            cin>>d1;
        }
        else{
            cin>>d1>>d2;
        }
    }
    else{
        cout<<"Invalid input";
    }
}