/// :3
#pragma GCC optimize("O3")
#pragma GCC optimize ("unroll-loops")
#pragma GCC target("avx,avx2,fma")
using namespace std;

#include "bits/stdc++.h"

#define pb push_back
#define F first
#define S second
#define f(i, a, b)  for(int i = a; i < b; i++)
#define all(a)  a.begin(),a.end()
#define rall(a) a.rbegin(),a.rend()
#define sz(x) (int)(x).size()
#define mp(x,y) make_pair(x,y)
#define popCnt(x) (__builtin_popcountll(x))
#define int ll

using ll = long long;
using ii = pair<int, int>;
using ull = unsigned long long;

const int N = 3e5+5, LG = 18, MOD = 998244353;
const long double PI = acos(-1);
const long double EPS = 1e-7;
const ll inf = UINT_MAX;
const int BLK = 100;

void doWork() {

    int n;
    cin >> n;
    int len = ceil(2*sqrt(n)/3);
    cout << len << '\n';
    cout << "1";
    for(int i = 2, j = 1; i <= len; i++) {
        if(i%2==1) {
            cout << ' ' << j * (j + 2);
            j += 2;
        }   else {
            cout << ' ' << j * (j + 1);
            j += 1;
        }
    }

}
int32_t main() {
#ifdef ONLINE_JUDGE
    ios_base::sync_with_stdio(0);
    cin.tie(0);
#endif // ONLINE_JUDGE

    int t = 1;
//    cin >> t;
    while (t--) {
        doWork();
    }
    return 0;
}