#include <iostream>

using namespace std;

int main()
{
    int k,sol = 100;
    cin >> k;
    for(int i = 1; i <= k && i <= 100; i++){
        int sum = (i * (i + 1)) / 2;
        if(sum >= k){
            sol = i;
            i = 1e9;
        }
    }
    cout << sol << endl;
    for(int i = 1; i <= sol; i++){
        cout << i << " ";
    }
    return 0;
}