#include<bits/stdc++.h>
using namespace std;
  
int main(){
    long long n,x = 0,y = 0,s;
    cin>>n;
    x = n / 33;
    if(n % 33 <= 16 && n % 33 != 0){
        x = x - 1;
        y = y + 1; 
    }else if(n % 33 > 16){
        x = x + 1;
    } 
    if(n <= 33) s = 1900; 
    else s = x * 1900 + y * 3300; 
     
    cout<<s<<endl;
}
/**************************************************************
	Problem: 1522
	User: wangyiyang
	Language: C
	Result: Compile Error
****************************************************************/