EqualizeTheArray.java

import java.io.*;
import java.math.*;
import java.security.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.regex.*;

public class Solution {

    // Complete the equalizeArray function below.
    static int equalizeArray(int[] arr) {
        Map<Integer, Integer> map = new HashMap();
        int del = 0;
        int freq = 1;
        
        for(int i : arr) {
            if(map.get(i) == null) {
                map.put(i, 1);
            } else {
                int newfreq = map.get(i) + 1;
                map.put(i, newfreq);
                freq = Math.max(newfreq, freq);
            }
        }
        
        del = arr.length - freq;
        return del;
    }

    private static final Scanner scanner = new Scanner(System.in);

    public static void main(String[] args) throws IOException {
        BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));

        int n = scanner.nextInt();
        scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])?");

        int[] arr = new int[n];

        String[] arrItems = scanner.nextLine().split(" ");
        scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])?");

        for (int i = 0; i < n; i++) {
            int arrItem = Integer.parseInt(arrItems[i]);
            arr[i] = arrItem;
        }

        int result = equalizeArray(arr);

        bufferedWriter.write(String.valueOf(result));
        bufferedWriter.newLine();

        bufferedWriter.close();

        scanner.close();
    }
}