algorithm/back_1024.cpp at master · JuJangGwon/algorithm · GitHub

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#include <iostream>

using namespace std;

int main()
{

    long int n;
    int L;
    cin >> n >> L;

    long int s = -1;
    long int e = -1;

    for (long int i = L; i <= 100; i++)
    {
        if (i % 2 == 1)
        {
            if (n % i == 0)
            {
                s = n / i - i / 2;
                e = n / i + i / 2;
                break;
            }
        }

        else
        {
            if (n % i == i / 2)
            {
                s = n / i - i / 2 + 1;
                e = n / i + i / 2;
                break;
            }
        }
    }
    if (s < 0)
        cout << -1 << endl;
    else
    {
        for (long int i = s; i <= e; i++)
        {
            cout << i << " ";
        }
        cout << endl;
    }
    return 0;
}