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Picking Numbers Hackerrank Solution - java

 Picking Numbers Hackerrank Solution - java 

Code::


import java.io.*;
import java.math.*;
import java.security.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.function.*;
import java.util.regex.*;
import java.util.stream.*;
import static java.util.stream.Collectors.joining;
import static java.util.stream.Collectors.toList;


public class Solution {
    public static void main(String[] args) throws IOException {
        int[] arr = new int[100];
        Scanner scn = new Scanner(System.in);
        int n = scn.nextInt();
        for(int i=0;i<n;i++){
            int num = scn.nextInt();
            arr[num]++;
        }
        int max = 0;
        for(int i=0;i<99;i++){
            max = Math.max(max,arr[i]+arr[i+1]);
        }
        System.out.println(max);
    }
}

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