bgt1 = int(input())
bgt2 = int(input())
bgt3 = int(input())
bgt4 = int(input())
bgt5 = int(input())
bgt6 = int(input())
bgt7 = int(input())
bgt8 = int(input())
bgt9 = int(input())
bgt10 = int(input())
bgt11 = int(input())
bgt12 = int(input())
bgt_list = [bgt12, bgt2, bgt3, bgt4, bgt5, bgt6, bgt7, bgt8, bgt9, bgt10, bgt11, bgt12]
saving = 0
interest = 0

for i in range(1, 13):
    for b in bgt_list:
        saving += 300
        saving = saving - b
        if saving < 0:
            print("-{:d}".format(i))
            break
        elif saving >= 100:
            while saving >= 100:
                saving -= 100
                interest += 100
        else:
            pass

result = saving + interest * 1.2
print(result)