thousand_a = thousand_b = 0
hundred_a = hundred_b = 0
twenty_five_a = twenty_five_b = 0
L = int(input())
M = int(input())
N = int(input())

if N >= 25:
    twenty_five_a = N // 25
    twenty_five_b = N % 25
elif N < 25:
    twenty_five_b = N
if (M + twenty_five_a) >= 4:
    hundred_a = (M + twenty_five_a) // 4
    hundred_b = (M + twenty_five_a) % 4
elif(M + twenty_five_a) < 4:
    hundred_b = M
if (L + hundred_a) >= 10:
    thousand_a = (L + hundred_a) // 10
    thousand_b = (L + hundred_a) % 10
elif (L + hundred_a) < 10:
    thousand_b = L
print(twenty_five_b + hundred_b + thousand_b)