D

import java.io.InputStreamReader;
import java.io.IOException;
import java.util.ArrayList;
import java.io.BufferedReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.util.StringTokenizer;
import java.io.InputStream;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        InputReader in = new InputReader(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        ProblemD solver = new ProblemD();
        solver.solve(1, in, out);
        out.close();
    }
}

class ProblemD {
    public void solve(int testNumber, InputReader in, PrintWriter out) {
        int k = in.nextInt();
        int left = 0;
        int right = 100001;
        while (right - left > 1){
            int mid = (right + left) / 2;
            long inv = ((long)mid*(mid - 1)) / 2;
            if (inv >= k)right = mid;
            else left = mid;
        }
        long inversion = ((long)right*(right - 1)) / 2;
        int []ar = new int[right + 1];
        boolean []over = new boolean[right + 1];
        int z = 0;
        ArrayList<Integer> arrayList = new ArrayList<Integer>();
        while (inversion > k){
            int lo = 0;
            int hi = right + 1;
            while (hi - lo > 1){
                int mid = (hi + lo) / 2;
                long dif = inversion - (right - mid);
                if (dif >= k)hi = mid;
                else lo = mid;
            }
            while (inversion - (right - hi) < k)hi--;
            arrayList.add(hi);
            over[hi] = true;
            inversion -= (right - hi);
        }
        out.print(right+"\n");
        int s = right - arrayList.size();
        for (int i = 0; i < arrayList.size(); i++) {
            out.print(arrayList.get(i)+" ");
        }
        for (int i = right; i >= 1 ; i--) {
            if (over[i])continue;
            out.print(i);
            if (s > 0){
                out.print(" ");
                s--;
            }
        }

    }
}

class InputReader {
    public BufferedReader reader;
    public StringTokenizer tokenizer;

    public InputReader(InputStream stream) {
        reader = new BufferedReader(new InputStreamReader(stream));
        tokenizer = null;
    }

    public String next() {
        while (tokenizer == null || !tokenizer.hasMoreTokens()) {
            try {
                tokenizer = new StringTokenizer(reader.readLine());
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        }
        return tokenizer.nextToken();
    }

    public int nextInt() {
        return Integer.parseInt(next());
    }


}