poj2410

简单题

#include <iostream>
#include <cstdlib>
#include <cstring>
#include <cstdio>
#include <cmath>
using namespace std;

int main()
{
    //freopen("D:\\t.txt", "r", stdin);
    int n;
    scanf("%d", &n);
    int m = floor(sqrt(n * 2));
    int ans = 0;
    for (int i = 1; i <= m; i++)
    {
        if (i % 2 == 0 && n % (i / 2) == 0 && n / (i / 2) % 2 == 1)
            ans++;
        if (i % 2 == 1 && n % i == 0)
            ans++;
    }
    printf("%d\n", ans);
    return 0;
}