ENCRYPT를 자바로 풀고 있는데 자꾸 런타임 오류가 나네요.. 결과값은 나오는데
```java
import java.util.Scanner;

public class Main {

public static void main(String[] args){
    Scanner br = new Scanner(System.in);
    int cases = Integer.valueOf(br.nextLine());
    while (cases-- > 0) {
        char[] inputs = br.nextLine().replaceAll(" ", "").toCharArray();
        int length = inputs.length;
        int halflength = (int) (Math.ceil((double) inputs.length / 2));
        char[] results = new char[length+1];
        int j = 0;
        if (length == 1) {
            results = inputs;
        } else {
            for (int i = 0; i < length; i = i + 2) {
                results[j] = inputs[i];
                results[j + halflength] = inputs[i + 1];
                j++;
            }
        }
        System.out.println(new String(results));
    }
}

}

확인 부탁드립니다.