by@satos___jp
WA
procedure main()
a := read()
s := 0
while a > 0 do {
s *:= 2
s +:= a % 10
a /:= 10
}
write(s)
end0010101000000100111110000100111110100011110110001010110101110101101000111101110111111101111100000000
1218516676999112054511486997