import java.util.Scanner;

public class Main83 {
	public static void main(String[] args) {
		Main83 p = new Main83();
	}

	public Main83() {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		
		solve(n);
	}

	public void solve(int n) {
		StringBuilder sb = new StringBuilder();
		if(n%2==0){
			n-=2;
			sb.append('1');
		}else{
			n-=3;
			sb.append('7');
		}
		
		for(int i=n;i>0;i-=2){
			sb.append('1');
		}
		
		System.out.println(sb.toString());
	}

}