import java.util.*;
public class matching{
	public static void main(String... args){
		Scanner scan = new Scanner(System.in);
		int n = scan.nextInt();
		System.out.println(make(n));
	}
	public static String make(int n){
		StringBuilder sb = new StringBuilder();
		if(n%2!=0){
			sb.append("7");
			n-=3;
		}
		while(n>1){
			sb.append("1");
			n-=2;
		}
		return sb.toString();
	}
}