I am trying to solve this question: https://www.hackerrank.com/challenges/anagram
Here's my code:
import java.util.*;
public class Anagram {
public static void main(String[] args)
{
Scanner reader = new Scanner(System.in);
int t = reader.nextInt();
while((t--) > 0)
{
String input = reader.nextLine();
if((input.length()) % 2 == 1)
System.out.println(-1);
else
{
int x = input.length();
int q = (int)(Math.floor((x / 2)));
String input1 = input.substring(0, q);
String input2 = input.substring(q, x);
int [] count2 = new int[26];
for(int i = 0; i < input2.length(); i++)
{
char ch2 = input2.charAt(i);
count2[ch2 - 'a']++;
}
// int [] count1 = new int[26];
for(int i = 0; i < input1.length(); i++)
{
char ch1 = input1.charAt(i);
if(count2[i] > 0)
count2[ch1 - 'a']--;
}
int count = 0;
for(int j = 0; j < 26; j++)
{
count = count + Math.abs(count2[j]);
}
System.out.println(count);
}
}
}
}
Sample Input
6
aaabbb
ab
abc
mnop
xyyx
xaxbbbxx
Expected Output
3
1
-1
2
0
1
My output
0
4
1
-1
2
2
Can anyone please tell me where it went wrong? I couldn't find the error...