1 #include<iostream>
 2 using namespace std;
 3 int main(){
 4     int T;
 5     while(cin>>T){
 6         if(T<=3500){
 7             cout<<T<<endl;
 8         }
 9         else{
10             for(int i=3600;i<=1000000;i+=100){
11                 int s=0;
12                    if(i>=3600&&i<=5000)    
13                        s=s+(i-3500)*0.03;
14                 if(i>=5100&&i<=8000)
15                       s=s+(i-5000)*0.1+45;
16                 if(i>=8100&&i<=12500)
17                     s=s+(i-8000)*0.2+45+300;
18                 if(i>=12600&&i<=38500)
19                     s=s+(i-12500)*0.25+45+300+900;
20                 if(i>=38600&&i<=58500)
21                     s=s+(i-38500)*0.3+45+300+900+6500;
22                 if(i>=58600&&i<=83500)
23                     s=s+(i-58500)*0.35+45+300+900+6500+6000;
24                 if(i>=83600)
25                     s=s+(i-83500)*0.45+45+300+900+6500+6000+8750;
26                     if(i-s==T){
27                         cout<<i<<endl;
28                         break;
29                 }
30             }
31         }
32     }
33     return 0; 
34 }