# Write a program that computes the value of a+aa+aaa+aaaa with a given digit as the value of a. a = raw_input()n1 = int( "%s" % a )n2 = int( "%s%s" % (a,a) )n3 = int( "%s%s%s" % (a,a,a) )n4 = int( "%s%s%s%s" % (a,a,a,a) )print n1+n2+n3+n4