import java.io.*;

class Process {
    private int N;
    
    Process(int N) {
        this.N = N;
    }

    private String repeat(String s, int n) {
        var result = new StringBuffer("");
        for(int i = 0; i < n; i++) {
            result.append(s);
        }

        return result.toString();
    }

    String getResult() {
        // N が偶数のとき
        if(N % 2 == 0) {
            return repeat("1", (N / 2));
        }

        // N が奇数のとき
        return ("7" + repeat("1", ((N / 2) - 1)));
    }
}

public class Main {
    public static void main(String[] args) throws IOException {
        var bufferedReader = new BufferedReader(new InputStreamReader(System.in));
        var printWriter    = new PrintWriter(new BufferedWriter(new OutputStreamWriter(System.out)));

        // 入力
        int N = Integer.parseInt(bufferedReader.readLine().trim());
        
        // 処理および出力
        printWriter.println((new Process(N)).getResult());

        bufferedReader.close();
        printWriter.close();
    }
}