coding-practice/problems/3005-count_elements_with_maximum_frequency/csharp/Program.cs

// LeetCode 3005: Count_elements_with_maximum_frequency
// 難度: Easy
// 日期: 2025-09-22

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

public class Solution {
    public int MaxFrequencyElements(int[] nums)
    {
        Dictionary<int, int> frequencyMap = new Dictionary<int, int>();

        // put nums into dictionary map
        foreach (var num in nums)
        {
            if (!frequencyMap.ContainsKey(num))
            {
                frequencyMap.Add(num, 0);
            }
            frequencyMap[num]++;
        }

        // find most frequency nums
        int maxFrequency = 0;
        if (frequencyMap.Count != 0)
        {
            maxFrequency = frequencyMap.Values.Max();
        }

        // count if have same max frequency nus
        int count = 0;
        foreach (var dic in frequencyMap)
        {
            if (dic.Value == maxFrequency)
            {
                count += maxFrequency;
            }
        }

        return count;
    }
}

public class Program {
    public static void Main() {
        var s = new Solution();
        // TODO: 可加入簡單輸入/輸出測試
        Console.WriteLine("Hello LeetCode 3005!");
    }
}