import java.util.Scanner;

public class No83 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		StringBuilder sb = new StringBuilder();
		int N = sc.nextInt();
		
		if(N % 2 == 1) {
			sb.append(7);
			N -= 3;
		}
		for(int i = 1;i <= N/2;i++) {
			sb.append(1);
		}
		System.out.println(sb);
	}
}