import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        
        if(N==2){
            System.out.println(1);
        }else if(N==3){
            System.out.println(7);
        }else{
            while(N>=4){
                System.out.print(1);
                N=N-2;
            }
            if(N==2){
                System.out.println(1);
            }else if(N==3){
                System.out.println(7);
            }
        }
    }
}