N = [input() for _ in range(3)]
N = list(map(int, N))
kin = (100*N[0] + 25*N[1] + 1*N[2]) % 1000
han, kin = kin // 100, kin % 100
twe, kin = kin // 25, kin % 25
print(han + twe + kin)