프로그래머스 - 키패드 누르기

class Solution {
    public String solution(int[] numbers, String hand) {
        String answer = "";
        int rightLocation = 12;
        int leftLocation = 10;
        for (int i = 0; i < numbers.length; i++) {
            if(numbers[i]==0) numbers[i]=11;
            if (numbers[i] % 3 == 0) {
                answer = answer + "R";
                rightLocation = numbers[i];
            } else if (numbers[i] % 3 == 1) {
                answer = answer + "L";
                leftLocation = numbers[i];
            } else {
                int leftD = Math.abs(numbers[i] - leftLocation) / 3 + Math.abs(numbers[i] - leftLocation) % 3;
                int rightD = Math.abs(numbers[i] - rightLocation) / 3 + Math.abs(numbers[i] - rightLocation) % 3;
                if (rightD > leftD) {
                    answer = answer + "L";
                    leftLocation = numbers[i];
                } else if (rightD < leftD) {
                    answer = answer + "R";
                    rightLocation = numbers[i];
                } else{
                    if (hand.equals("right")) {
                        rightLocation = numbers[i];
                        answer = answer + "R";
                    } else {
                        leftLocation = numbers[i];
                        answer = answer + "L";
                    }
                }
            }

        }
        return answer;
    }
}