import java.util.*;

public class HelloWorld
{
  public static void main( String[] args )
  {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    int keta = 0;
    int i = N;

    if(N%2 == 0){
      while(i>0){
        System.out.print("1");
        i = i-2;
      }
    }else{
      System.out.print("7");
      i = i-3;
      while(i>0){
        System.out.print("1");
        i = i-2;
      }
    }
  }
}