import java.util.Scanner

object matching {
  def main(args: Array[String]): Unit = {
    val sc = new Scanner(System.in)
    var n = sc.nextInt
    var lst = List[Int]()

    while(n >= 2 && n != 3) {
      n = n - 2
      lst = 1 :: lst
    }
    if(n == 3) {
      lst = 7 :: lst
    }
    println(lst.mkString(""))
  }
}