#include <bits/stdc++.h>
using namespace std;
int a[13];
int main(){
	for(int i = 1;i<=12;i++) cin>>a[i];
	int sum=0;
	for(int i = 1;i<=12;i++){
		if(sum+a[i]>310&&sum<=310) printf("%.1f\n",(310-sum)*3+(a[i]-310+sum)*3.3),sum+=a[i];
		else if(sum+a[i]>520&&sum<=520) printf("%.1f\n",(520-sum)*3.3+(a[i]-520+sum)*4.2),sum+=a[i];
		else if(sum+a[i]>520&&sum<=310) printf("%.1f\n",(310-sum)*3+(520-310)*3.3+(a[i]-520+sum)*4.2),sum+=a[i];
		else{
			sum+=a[i];
			if(sum<=310) printf("%.1f\n",a[i]*3.0);
			if(sum>=310&&sum<=520) printf("%.1f\n",a[i]*3.3;
		    if(sum>=520) printf("%.1f\n",a[i]*4.2);
		}
	}
}
/*
WA五个点
*/