import java.util.Scanner;

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