#include<bits/stdc++.h>
using namespace std;
int main(){
    int z;
	cin>>z;
	if(z>=200&&z<=299){
		cout<<z+50;
	}else if(z>=300&&z<=499){
		cout<<z+100;
	}else if(z>=500){
		cout<<z+200;
	}else{
        cout<<z; 
	} 
}
/**************************************************************
	Problem: 1391
	User: xuezihong1
	Language: C++
	Result: Accepted
	Time:22 ms
	Memory:2072 kb
****************************************************************/