import java.util.*;
import java.math.*;
import java.io.*;

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