package yukicoder;

import java.util.Scanner;

public class Yuki83{
	
	public static void main(String[] args) {
		
//		int numbers[] = {8,2,5,5,5,4,5,6,3,7,6};
		
		Scanner scan = new Scanner(System.in);
		int num = scan.nextInt();
		scan.close();
		int two_num = 0;
		int three_num = 0;
		String ans = "";
		
		two_num = num / 2;
		
		if (three_num == 3){
			three_num ++;
		} else if(num % 2 != 0) {
			two_num = two_num -1;
			three_num ++;
		}
		
		for(int i =0; i < two_num; i++ ) {
			ans += "1"; 	
		}
		for(int i =0; i < three_num; i++ ) {
			ans += "7"; 	
		}

		System.out.println(ans);
		
		/*
		int ans = 0;
		int ans2 = 0;
		String strAns = "";
		
		
		for (int i = 0; i <= 9 ; i++ ) {
			if(ans >= ans2){
				ans2 = ans;
				if(count < num[i]){
					ans = num[i]/count;
					for(int j = 0; j < i; j++) {
						strAns += String.valueOf(i);
					}
					ans = Integer.parseInt(strAns);
				}else{
					ans = (count / num[i]);
					strAns += String.valueOf(ans);
					for(int j = 0; j < i; j++) {
						strAns += String.valueOf(i);
					}
					ans = Integer.parseInt(strAns);
				}
			}
		}
		System.out.println(ans);
		*/
	}
}