s = [int(input()) for i in range(3)]

if s[2] >= 25:
    s[1] += s[2] // 25
    s[2] %= 25

if s[1] >= 4:
    s[0] += s[1] // 4
    s[1] %= 4

if s[0] >= 10:
    s[0] %= 10

print(sum(s))