import java.util.Scanner;

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