import java.io.BufferedInputStream;
import java.io.IOException;
import java.lang.reflect.Array;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.*;
import java.util.Map.Entry;

public class Main {
	public static final int C =  1000000007;
	//static int map[][];
	//static int N;
	//static int M;
	//static int tic[][];
	//static int dp[][];
	//static int max;
	//static int set[];
	//static int p[];
	//static ArrayList<HashSet<Integer>> al;
	//static int a[][];
	//static ArrayList<HashMap<Long, Long>> al;
	//static String a[];
	//static String str;
	static int[] mach = new int[] {6, 2, 5, 5, 4, 5, 6, 3, 7, 6};
	
	public static void main(String[] args) {
		//StringBuilder sb = new StringBuilder();
		BufferedInputStream bs = new BufferedInputStream(System.in);
		Scanner sc = new Scanner(bs);
		//String str = sc.next();
		int n = sc.nextInt();
		
		String ans = "";
		while (n > 1) {
			if (n == 3) {
				ans = 7 + ans;
				n -= 3;
			} else {
				ans = 1 + ans;
				n -= 2;
			}
			
		}
		
		
		
		
		
		System.out.println(ans);
		
	}
	
	
	
}