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==0){
            System.out.print(1);
            N=N-2;
            while(N!=0){
                System.out.print(1);
                N=N-2;
            }
            System.out.println();
        }else{
            System.out.print(7);
            N=N-3;
            while(N!=0){
                System.out.print(1);
                N=N-2;
            }
            System.out.println();
        }
    }
}