#include<stdio.h>
int main()
{
	int money[12];
	int sum;//temp 
	int jin;//used to show how much jin has now
	for(int i=0;i<=11;i++)
	{ 
	  jin+=300;
	  scanf("%d",&money[i]);
	  jin-=money[i];
	  if(jin<0)
	  {
	  	printf("%d",-i-1);
        return 0;
	  }
	  sum+=(100*(int)(jin/100));
	  jin-=(100*(int)(jin/100));
	  
	}
	printf("%d",(int)(1.2*sum+jin));
	return 0;
}