hum = input()
qua = input()
pen = input()
total = int(hum)*100+int(qua)*25+int(pen)
sen = int(total)/1000
hum2 = (int(total)-int(sen)*1000)/100
qua2 = (int(total)-int(sen)*1000-int(hum2)*100)/25
pen2 = int(total)-int(sen)*1000-int(hum2)*100-int(qua2)*25
print(int(hum2)+int(qua2)+int(pen2))