import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;

public class No83 {

	public static void main(String[] args) throws IOException{
		//最大マッチング
		int N = Integer.parseInt(readStr()[0]);
		StringBuilder sb = new StringBuilder();
		
		if(N % 2 == 1){
			sb.append("7");
			N -= 3;
		}
		
		for(int i = 0 , m = N / 2;i < m;i++) {
			sb.append("1");
		}
		
		System.out.println(sb);

	}
	
	public static String[] readStr() throws IOException{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		ArrayList<String> list = new ArrayList<>();

		do {
			list.add(br.readLine());
		}while(br.ready());

		br.close();

		String[] text = new String[list.size()];
		list.toArray(text);

		return text;

	}

}