import java.util.Scanner;

public class Macchi {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int n = scan.nextInt();
		int one = 0;
		int seven = 0;

		if(n%2==0) {
			one = n/2;
		}else {
			seven = 1;
			one = (n-3)/2;
		}

		StringBuilder sb = new StringBuilder();
		if(seven==1) {
			sb.append(7);
		}
		for(int i=0; i<one; i++) {
			sb.append(1);
		}
		System.out.println(String.valueOf(sb));
	}

}