题解 | 小红背单词 c#

using System;
using System.Collections.Generic;
using System.Linq;
public class Program {
    public static void Main() {
        int.TryParse(Console.ReadLine(), out int n);
        Dictionary<string, int> wordCount = new Dictionary<string, int>();
        HashSet<string> rememberedWords = new HashSet<string>();
        int rememberedWordsCount = 0;
		
        for (int i = 0; i < n; i++) {
            string inputWord = Console.ReadLine();
            wordCount[inputWord] = wordCount.GetValueOrDefault(inputWord, 0) + 1;

            if (wordCount[inputWord] > rememberedWordsCount) {
                if (!rememberedWords.Contains(inputWord)) {
                    rememberedWordsCount++;
                    rememberedWords.Add(inputWord);
                }

            }

        }

        Console.WriteLine(rememberedWordsCount);
    }
}