import java.util.Scanner;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		StringBuilder sb = new StringBuilder();

		if(n % 2 == 1){
			sb.append(7);
			n -= 3;
		}
		for(int i = 0; i < n / 2; i++){
			sb.append(1);
		}
		System.out.println(sb);
	}
}