coin_list=[]
num_list=[10,4,25]

for i in range(3):
    coin_list.append(int(input()))

for i in range(len(coin_list)-1,-1,-1):
    if coin_list[i] // num_list[i] >= 1:
        if i-1 >= 0:
            coin_list[i-1] += coin_list[i] // num_list[i]
        coin_list[i] -= (coin_list[i] // num_list[i]) * num_list[i]

sum=0
for i in coin_list:
    sum += i
print(sum)