import java.util.*;

public class prog {

    public static void main(final String[] args) {
        Scanner scanner = new Scanner(System.in);
        long n = scanner.nextLong();
        for (int i = 0; i <= Math.min(n, 100); i++) {
            long sumi = (i * (i + 1)) / 2;
            for (int j = 0; j < i; j++) {
                if (i - j  <= 100) {
                    long sumj = (j * (j + 1)) / 2;
                    if (sumi - sumj == n) {
                        System.out.println(i - j);
                        for (int k = j + 1; k <= i; k++) {
                            System.out.print(k + " ");
                        }
                        System.exit(0);
                    }
                }
            }
        }
    }

}