L = int(input())
M = int(input())
N = int(input())
n = 0
if N > 25:
    n = N%25
else:
    n = N
r =  N//25
d,m = (M+r)//4,(M+r)%4
s,l = (L+d)//10,(L+d)%10
print(n+m+l)