import java.util.Scanner;

class S21_maxMaching{
  public static void main(String[] args){
    int num;
    Scanner sc = new Scanner(System.in);

    num = sc.nextInt();

    if(num % 2 == 1){
      System.out.print("7");
      num -= 3;
    }
    num /= 2;
    for(int i = 0; i < num; i++){
      System.out.print("1");
    }

    System.out.println("");
  }
}