import java.math.BigInteger;
import java.util.*;
 
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int iti = n/2-1;
        int mae = n%2;
        StringBuffer bu = new StringBuffer();
        for(int i=0;i<iti;i++){
        	bu.append(1);
        }
        if(mae==0){
        	bu.insert(0, 1);
        }else{
        	bu.insert(0, 7);
        }
        System.out.println(bu);
    }
}