#include<bits/stdc++.h>
using namespace std;
int main(){
    int a;
    cin>>a;
    if(a<=100) cout<<a*2;
    else cout<<(a-100)*1+100*2;
}
/**************************************************************
	Problem: 1637
	User: yangjunwen
	Language: C++
	Result: Accepted
	Time:11 ms
	Memory:2072 kb
****************************************************************/