import java.util.Scanner;

public class MaxMatching {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int N = scanner.nextInt();
        // 2 : 1
        // 3 : 7
        int div = N / 2;
        int remainder = N % 2;
        if (remainder == 1) {
            System.out.print("7");
            div = div - 1;
        }
        for (int i = 0; i < div; i++) {
            System.out.print("1");
        }
    }
}