import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt();
		String s="";
		if(n%2==1){
			s+="7";
			n-=3;
		}
		for(int i=0;i<n/2;i++){
			s+="1";
		}
		System.out.println(s);
		
	}
}