import java.util.*;
public class matching{
	public static void main(String... args){
		Scanner scan = new Scanner(System.in);
		int n = scan.nextInt();
                make(n);
	}
	public static void make(int n){
		if(n%2!=0){
			System.out.print("7");
			n-=3;
		}
		while(n>1){
			System.out.print("1");
			n-=2;
		}
	}
}