lsm = []
for i in range(3):
    lsm.append(int(input()))
if 0<=lsm[0]<=1000 and 0<=lsm[1]<=1000 and 0<=lsm[2]<=1000:
    N = lsm[2]%25
    lsm[1] = (lsm[1]+(lsm[2]//25))
    M = lsm[1]%4
    lsm[2] = (lsm[0]+(lsm[1]//4))
    L = lsm[2]%10
    print(L+M+N)
else:
    print('error')