a = []
x = 0 # x为手上的钱
y = 0 # y为妈妈的钱
for i in range(12):
a.append(int(input()))
# a[i]为这个月的开支
for i in range(12):
x += 300
while (x - a[i]) >= 100:
x -= 100
y += 100
if x - a[i] < 0:
print('-{}'.format(i))
x = 0
break
else:
x -= a[i]
else:
print(int(1.2 * y)+x)