using namespace std;
int a,m,l,n;
int b[13];
int main()
{	
for	(int i=1;i<=12;i++)          
{cin>>b[i];}	
for(int month=1;month<=12;month++)	
{m+=300;
if(m-b[month]>0)//减去预算如果能剩下钱
{int p=m-b[month];//除去预算后的钱 
if(p/100!=0)//如果能存钱 
{l+=(p/100)*100;
 m=m-b[month]-(p/100)*100;
 }
 else if(p/100==0)
 {m=m-b[month];
 }
}
else if(m-b[month]<0)//减去预算后钱不够
{cout<<0-month;
n++;
break;}
}	
if(n==0)
{float z=1.2;
cout<<z*l+m;}	
return 0;	
}