import java.util.Scanner;

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