import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        
        Scanner sc = new Scanner(System.in);
        
        int n = sc.nextInt();
        StringBuilder sb = new StringBuilder();
        
        int roopCnt = n / 2;
        if(n % 2 != 0){
            sb.append(7);
            roopCnt--;
        }
        
        for(int i = 0 ; i < roopCnt ; i++){
            sb.append(1);
        } 
         
        System.out.println(sb); 
         
    }
    
}