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

/**************************************************************
	Problem: 1391
	User: chenmingyu
	Language: C++
	Result: Accepted
	Time:23 ms
	Memory:2072 kb
****************************************************************/