Jul 23, 2022 · Jul 23, 2022
diff --git a/csharp/347-Top-K-Frequent-Elements.cs b/csharp/347-Top-K-Frequent-Elements.cs
 using System.Collections.Generic;
 using System.Linq;

 namespace NeetCodeCSharpSolutions.ArraysHashing
 {
    public class Solution
    {
        public int[] TopKFrequent(int[] nums, int k)
        {
            var pq = new PriorityQueue<int, int>(new DescendingComparer());

            var map = nums.GroupBy(x => x).ToDictionary(x => x.Key, x => x.Count());

            foreach (var kv in map)
            {
                pq.Enqueue(kv.Key, kv.Value);
            }

            var ans = new List<int>();
            while (k-- > 0)
            {
                ans.Add(pq.Dequeue());
            }

            return ans.ToArray();
        }

        public class DescendingComparer : IComparer<int>
        {
            public int Compare(int x, int y)
            {
                return y.CompareTo(x);
            }
        }
    }
 }
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,36 @@
		using System.Collections.Generic;
		using System.Linq;

		namespace NeetCodeCSharpSolutions.ArraysHashing
		{
		public class Solution
		{
		public int[] TopKFrequent(int[] nums, int k)
		{
		var pq = new PriorityQueue<int, int>(new DescendingComparer());

		var map = nums.GroupBy(x => x).ToDictionary(x => x.Key, x => x.Count());

		foreach (var kv in map)
		{
		pq.Enqueue(kv.Key, kv.Value);
		}

		var ans = new List<int>();
		while (k-- > 0)
		{
		ans.Add(pq.Dequeue());
		}

		return ans.ToArray();
		}

		public class DescendingComparer : IComparer<int>
		{
		public int Compare(int x, int y)
		{
		return y.CompareTo(x);
		}
		}
		}
		}