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

count1 = 0
while N - 25 >= 0:
    N = N - 25
    count1 += 1

newM = M + count1
count25 = 0
while newM - 4 >= 0:
    newM = newM - 4
    count25 += 1

newL = L + count25
count100 = 0
while newL - 10 >= 0 :
    newL = newL- 10
    count100 += 1

maisu1 = N % 25

result = maisu1 + newM + newL
print(result)