A了6个点，WA了4个点

#include<bits/stdc++.h>
using namespace std;
#define ll long long 

ll n;

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0),cout.tie(0);
    cin>>n;
    ll cnt = 0;
    for(ll i = 3,j = 2;i*i<=n;i+=2,j+=2)
    {
        if(n%i==0)
        {
            cnt++;
        }
        if((n*1.0/j)-(n/j)==0.5)
        {
            cnt++;
        }
    }
    cout<<cnt+1<<endl;
}