import java.util.Scanner;

class Yuki83 {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    String s = "";
    int a = n/2;
    int b = n%2;
    int c = 0;
    if(b==1){
      a-=1;
      c=1;
    }
    if(c==1){
      s+='7';
    }
    for(int i=0; i<a; ++i){
      s+='1';
    }
    System.out.println(s);
  }
}