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"); } } } }