#include<bits/stdc++.h>
using namespace std;
int main(void){
	long long n;
	double ans = 0.00;
	for(int i = 0;i < 12;++i){
		scanf("%lld",&n);
		if(n <= 310){
			ans = 3.0 * n;
		}else if(n > 310 && n <= 520){
			ans = 930.0 + (n-310) * 3.3;
		}else{
			ans = 930.0 + 210 * 3.3 + (n - 520) * 4.2;
		}
		printf("%.1lf\n",ans);
	}
	return 0;
} 

求大神修改，谢谢