#include<bits/stdc++.h>
using namespace std;
int main() {
int t;
scanf("%d",&t);
int s;
if(t<=3500) {
s=t;
} else if(t<=3500+1500-45) {
s=(t-105)*100/97;
} else if(t<=8000-45-300) {
s=(t-455)*10/9;
}else if(t<=3500+9000-45-300-900) {
s=(t+345-1600)*10/8;
}else if(t<=3500+35000-45-300-900-(35000-9000)*0.25) {
s=(t-1880)*100/75;
} else if(t<=3500+55000-45-300-900-6500-6000) {
s=(t-3805)*10/7;
} else if(t<=3500+80000-8750-6000-6500-900-300-45) {
s=(t-6730)*100/65;
} else {
s=(t-15080)*100/55;
}
printf("%d",s);
return 0;
}