/*
    Keep It Simple!
*/

#include <fstream>
#include <vector>
#include <list>
#include <stack>
#include <string>
#include <cmath>
#include <queue>
#include <vector>
#include <algorithm>

using namespace std;

#ifndef ONLINE_JUDGE
    ifstream cin("data.in");
    ofstream cout("data.out");
#else
    #include<iostream>
#endif // ONLINE_JUDGE

#define ll long long
#define mp make_pair
#define fi first
#define se second
#define pb push_back

typedef pair<int,int> pii;
typedef pair<ll,ll> pll;

int N;
int Sum,ans;

void Solve()
{
    cin >> N;

    for (ans = 1; Sum < N ; Sum+=ans,++ans);
    --ans;

    cout << ans << '\n';
    for (int i = 1; i <= ans; ++i)
        cout << i << ' ';
    cout << '\n';
}

int main()
{
    Solve();
    return 0;
}