#include<stdio.h>
int main(){
	long I;
	long award;
	scanf("%ld", &I);
	if (I <= 100000) { award = I * 0.1; }
	if (I > 100000 && I <= 200000) { award = 10000 + (I - 100000)*0.075;  }
	if (I > 200000 && I <= 400000) { award = 10000 + 7500 + (I - 200000)*0.05; }
	if (I > 400000 && I <= 600000) { award = 10000 + 7500 + 10000 + (I - 400000)*0.03; }
	if (I > 600000 && I <= 1000000) { award = 10000 + 7500 + 10000 +6000+ (I - 600000)*0.015; }
	if (I > 1000000) { award = 10000 + 7500 + 10000 + 6000 + 6000+(I - 1000000)*0.01; }
	printf("%ld", award);
}