hand=input()
hand_split=hand.split()
a=int(hand_split[0])
b=int(hand_split[1])
c=int(hand_split[2])

if c>=25:
    b+=c//25
    c=c%25
if b>=4:
    a+=b//4
    b=b%4
if a>=10:
    a=a%10
sum=a+b+c
print(sum)