import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    int k = N / 6;
    int r = N % 6;
    String ans = "";
    for(int i = 0; i < k; i++) {
      ans += "111";
    }
    if(r == 5) ans = "7" + ans + "1";
    if(r == 4) ans = ans + "11";
    if(r == 3) ans = "7" + ans;
    if(r == 2) ans = ans + "1";
    if(r == 1) {
      ans = "711";
      for(int i = 0; i < k - 1; i++) {
        ans += "111";
      }
    } 
    System.out.println(ans);
  }
}