题解 | 小红书推荐系统 c#

using System;
using System.Collections.Generic;
using System.Linq;
public class Program {
    public static void Main() {
        string[] inputWords = Console.ReadLine().Split(' ');
		//一行linq
        string[] keyWords = inputWords.GroupBy(x => x).Where(x => x.Count() >= 3).OrderByDescending(x => x.Count()).ThenBy(x => x.Key).Select(x => x.Key).ToArray();
        foreach(var item in keyWords)
        {
            Console.WriteLine(item);
        }

    }
}