BAI1 HSGHN L12 V1 2019-2020

#define task "BAI1"

#include <iostream>
#include <cstdio>

using namespace std;

using ll = long long;
ll n;

void Read()
{
    cin >> n;
}

void Solve()
{
    ll ans(0);

    for (ll i = 1; i * i < n * 2; ++i)
        if (n * 2 % i == 0 && (i & 1) != ((n * 2 / i) & 1))
            ++ans;

    cout << ans;
}

int32_t main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    if (fopen(task ".INP", "r"))
    {
        freopen(task ".INP", "r", stdin);
        freopen(task ".OUT", "w", stdout);
    }

    Read();
    Solve();
}