Solution.cs

using System.CodeDom.Compiler;
using System.Collections.Generic;
using System.Collections;
using System.ComponentModel;
using System.Diagnostics.CodeAnalysis;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Runtime.Serialization;
using System.Text.RegularExpressions;
using System.Text;
using System;

class Solution {
    static int equalizeArray(int[] arr) {
        var dictCount = new Dictionary<int, int>();
        var maxCount = 0;
        foreach(var a in arr) {
            if(!dictCount.ContainsKey(a))
                dictCount.Add(a, 0);
            dictCount[a]++;
            maxCount = Math.Max(maxCount, dictCount[a]);
        }
        return arr.Length - maxCount;
    }

    static void Main(string[] args) {
        TextWriter textWriter = new StreamWriter(@System.Environment.GetEnvironmentVariable("OUTPUT_PATH"), true);

        int n = Convert.ToInt32(Console.ReadLine());

        int[] arr = Array.ConvertAll(Console.ReadLine().Split(' '), arrTemp => Convert.ToInt32(arrTemp))
        ;
        int result = equalizeArray(arr);

        textWriter.WriteLine(result);

        textWriter.Flush();
        textWriter.Close();
    }
}