What is in test #7 ??

            Thread.CurrentThread.CurrentCulture = CultureInfo.InvariantCulture;

            var n = int.Parse(Console.ReadLine().Trim());

            int a = 0;
            var p = (int)Math.Truncate(Math.Sqrt(n + n));
            while (p > 1)
            {
                var s = n - p * (p + 1) / 2;
                if (s >= 0)
                {
                    int rem;
                    a = Math.DivRem(s, p, out rem);
                    if (rem == 0)
                        break;
                }
                p--;
            }
            a++;

            Console.WriteLine("{0} {1}", a, p);

I got it!

[code deleted]

Edited by moderator 21.10.2019 23:03