import java.util.*;
import java.util.stream.Stream;
import java.time.*;
import java.time.format.*;

public class No83 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        if(n%2 == 0) {
            for(int i = 0; i < n/2 ;i++) {
                System.out.print("1");
            }
        }else {
            System.out.print("7");
            for(int i = 0 ; i < (n-2)/2 ; i++) {
                System.out.print("1");
            }
        }
	}
}