l = [int(x) for x in input().split()] s = l[0]*0.2+l[1]*0.3+l[2]*0.5 print(s) 全WA l = [int(x) for x in input().split()] s = l[0]*0.2+l[1]*0.3+l[2]*0.5 print(int（s）) 全AC