L = int(input())
M = int(input())
N = int(input())
S = 0

M += (N // 25)
N = N % 25

L += (M * 25 // 100)
M = ((M * 25) % 100)//25

S += (L*100 // 1000)
L = ((L*100) % 1000)//100    
    
print(L+M+N)