import java.util.*;

public class Exercise139{
  public static void main (String[] args){

    Scanner sc = new Scanner(System.in);

    int n = sc.nextInt();
    String s = "";
    if(n % 2 == 0){
      for(int i = 0; i < n / 2; i++){
        s += "1";
      }
    }else{
      s += "7";
      for(int i = 0; i < n / 2 - 1; i++){
        s += "1";
      }
    }
    System.out.println(s);
  }
}