buvinghausen

using System.Linq;

int digitDegree(int n)
{
	var str = n.ToString();
	var i = 0;
	for (; str.Length > 1; i++)
	{
		str = str.Sum(c => int.Parse(c.ToString())).ToString();
	}

buvinghausen

using System;

bool bishopAndPawn(string bishop, string pawn) =>
    Math.Abs(bishop[0] - pawn[0]) == Math.Abs(bishop[1] - pawn[1]);

buvinghausen

using System;
using System.Linq;

bool isBeautifulString(string inputString)
{
  var list = Enumerable.Range(Convert.ToInt32('a'), 26).Select(i => inputString.Count(c => c == i)).ToList();
  return list.SequenceEqual(list.OrderByDescending(i => i));
}

buvinghausen

static int[][] Minesweeper(bool[][] matrix) => [.. matrix
    .Select((row, i) => row
        .Select((_, j) => matrix
            .Skip(i - 1)
            .Take(i == 0 ? 2 : 3)
            .SelectMany(r => r
                .Skip(j - 1)
                .Take(j == 0 ? 2 : 3))
            .Count(m => m) - (matrix[i][j] ? 1 : 0))
        .ToArray()

buvinghausen

FizzBuzz(63).ForEach(Console.WriteLine);
return;

static List<string> FizzBuzz(int count) => [.. Enumerable
    .Range(1, count)
    .Select(i => (i % 3 == 0, i % 5 == 0) switch
    {
        (true, false) => "Fizz",
        (false, true) => "Buzz",
        (true, true) => "FizzBuzz",