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

using System.Linq;

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()).ToArray();

buvinghausen

using System;
using System.Collections.Generic;
using System.Linq;

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",