import java.util.*;

public class Yukicoder_83{
	public static void main(String[] args){
		Scanner stdIn = new Scanner(System.in);
		int N = stdIn.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-3)/2;i++){
				System.out.print("1");
			}
		}
		System.out.println();
	}
}