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:
    lsm[1]+=lsm[2]//25
    lsm[2]%=25
    lsm[0]+=lsm[1]//4
    lsm[1]%=4
    lsm[0]=lsm[0]%10
    print(lsm[0]+lsm[1]+lsm[2])
else:
    print('error')