import java.util.Scanner;
class N083{
	public static void main(String args[]){
		Scanner s = new Scanner(System.in);
		int n = s.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 - 1; i++){
				System.out.print(1);
			}
		}
		System.out.println();
	}
}