import java.util.Scanner;
public class No83 {

	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		int N = s.nextInt();
		s.close();

		StringBuilder sb = new StringBuilder();
		for(int i = 0;i < N/2 - 1;i++){
			sb.append("1");
		}
		if(N % 2 == 1){
			sb.insert(0, "7");
		}else{
			sb.append("1");
		}
		System.out.println(sb);

	}

}