import java.util.Scanner;

public class Test {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		int n = sc.nextInt();
		String s;
		if(n%2 == 1){
			System.out.print("7");
		} else {
			System.out.print("1");
		}
		n /= 2;
		for(int i = 1; i < n; i++){
			System.out.print("1");
		}
		System.out.println();
	}
}