Hackerrank

C# tips

• System.Console.Error.WriteLine works to write debug messages like System.Console.Error.WriteLine(System.Text.Json.JsonSerializer.Serialize(person));
• Formatting decimals is easiest with string.Format("{0:0.00}", 256.583); // "256.58"

Generic corner cases:

• Integer overflow (consider (Int64))
• 0, Int.MaxValue, Int.MinValue, 1, -1