L = int(input())
M = int(input())
N = int(input())

sum = 0

if L % 25 == 0:
    M = M + L // 25
else:
    M = M + L // 25
    sum = sum + L % 25

if M % 4 == 0:
    N = N + M // 4
else:
    N = N + M // 4
    sum = sum + M % 4

sum = sum + N


print(sum)