Pangrams.scala

object Pangrams {
  import scala.io.StdIn
  def main(args: Array[String]): Unit = {
    println(isPangram(StdIn.readLine().toLowerCase()))
  }

  private val pangram = 67108863
  def isPangram(s: String): String = {
    var i = 0
    var bitmask = 0
    while (i < s.length) {
      bitmask |= charToMask(s.charAt(i))
      if (bitmask == pangram) {
        return "pangram"
      }
      i += 1
    }
    "not pangram"
  }

  def charToMask(c: Char): Int = if (c >= 'a' && c <= 'z') 1 << (c - 'a') else 0
}