import sys for line in sys.stdin: a = line.split() A,B,C=int(a[0]),int(a[1]),int(a[2]) print(int(A*0.2)+int(B*0.3)+int(C*0.5))
import sys for line in sys.stdin: a = line.split() A,B,C=int(a[0]),int(a[1]),int(a[2]) print(int(A*0.2)+int(B*0.3)+int(C*0.5))