⬇️

#include<bits/stdc++.h>
using namespace std;
int main(){
int a;
cin>>a;
if(a<=100){
cout<<a<<endl;
}else if(a<=200){
cout<<a-10;
}else if(a<=300){
cout<<a-20;
}else {
cout<<a-50;
}
return 0;
}