package yukicoder;

import java.util.Scanner;

public class N83 {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		long c1 = 0;
		long c2 = 0;
		if(n % 2 == 0){
			c1 = n / 2;
			for(long i = 0;i < c1;++i){
				System.out.print(1);
			}
		}else{
			c1 = n / 2 - 1;
			c2 = 1;
			System.out.print(7);
			for(long i = 0;i < c1;++i){
				System.out.print(1);
			}
		}
	}
}