#include <iostream>
#include <vector>
using namespace std;

int k;
vector<int> ans;

int main() {
	int i;
	cin >> k;
	
	int val = 1;
	while (k > 0) {
		for (i = 1; i * (i - 1) / 2 <= k; i++); i--;
		int n = i;
		for (i = 0; i < n; i++) ans.push_back(val);
		k -= n * (n - 1) / 2;
		val += 2;
	}
	
	cout << ans.size() << endl;
	for (i = 0; i < ans.size(); i++) {
		cout << ans[i];
		if (i + 1 < ans.size()) cout << " ";
	}
	cout << endl;
	return 0;
}