#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;

	return 0;
}

/**************************************************************
	Problem: 1637
	User: linzihang
	Language: C++
	Result: Accepted
	Time:10 ms
	Memory:2072 kb
****************************************************************/