#include <bits/stdc++.h>
using namespace std;
int main(){
    int n,m;
    cin>>n;
    if(n<200){
        m=n;
    }else if(n>=200&&n<=299){
        m=n+50;
    }else if(n>=300&&n<=499){
        m=n+100;
    }else if(n>=500){
        m=n+200;
    }
    cout<<m<<endl;
    return 0;
}

/**************************************************************
	Problem: 1391
	User: panjinyan
	Language: C++
	Result: Accepted
	Time:25 ms
	Memory:2072 kb
****************************************************************/