[java] 프로그래머스 키패드 누르기

https://school.programmers.co.kr/learn/courses/30/lessons/67256

프로그래머스

 

class Solution {
    public String solution(int[] numbers, String hand) {
        String answer = "";
        int[][] loc = new int[][]{
            {4,2},
            {1,1}, {1,2}, {1,3},
            {2,1}, {2,2}, {2,3},
            {3,1}, {3,2}, {3,3},
            {4,1}, {4,3}
        };
        int[] left = loc[10];
        int[] right = loc[11];
        
        
     for(int number : numbers){
            if(number==1 || number==4 || number==7){
                answer+="L";
                left = loc[number];
                continue;
            }
            if(number==3 || number==6 || number==9){
                answer+="R";
                right = loc[number];
                  continue;
            }
         
         int leftDist = getDistance(loc[number], left);
         int rightDist = getDistance(loc[number],right);
         
         if(leftDist < rightDist){
             answer += "L";
             left = loc[number];
         }else if(leftDist > rightDist){
             answer += "R";
             right = loc[number];
         }else{
             if("right".equals(hand)){
                 answer += "R";
                 right = loc[number];
             }else{
                 answer += "L";
                 left = loc[number];
             }
         }
        
        }
        
        
        return answer;
    }
    
    private int getDistance(int[] a, int[] b){
        return Math.abs(a[0]-b[0]) + Math.abs(a[1]-b[1]);
    }
}