import strutils, math
proc solve(): int =
xy = readLine(stdin).split(' ').map(parseDouble)
x = xy[0]
y = xy[1]
return ans
echo(solve)
aW1wb3J0IHN0cnV0aWxzLCBtYXRoCgpwcm9jIHNvbHZlKCk6IGludCA9CiAgeHkgPSByZWFkTGluZShzdGRpbikuc3BsaXQoJyAnKS5tYXAocGFyc2VEb3VibGUpCiAgeCA9IHh5WzBdCiAgeSA9IHh5WzFdCiAgYW5zID0gc3FydCh4KngreSp5ICsgMS4wKS5mbG9vcigpLnRvSW50KCkKICByZXR1cm4gYW5zCgplY2hvKHNvbHZlKQ==