[키패드 누르기]

class Solution {
    Position left;
    Position right;
    Position numPos;

    public String solution(int[] numbers, String hand) {
        String answer = "";
        // 1. 왼손 오른손 위치 초기화
        left = new Position(3, 0);
        right = new Position(3, 2);

        for (int num : numbers) {
            // 2. 숫자를 누를 손가락 정하기
            numPos = new Position((num - 1) / 3, (num - 1) % 3);
            if (num == 0)
                numPos = new Position(3, 1);
            String finger = numPos.getFinger(hand);

            // 3. 정해진 손가락을 answer에 담고, 손가락 위치 이동
            answer += finger;

            if (finger.equals("L"))
                left = numPos;
            else
                right = numPos;
        }

        return answer;
    }

    class Position {
        int row;
        int col;

        Position(int row, int col) {
            this.row = row;
            this.col = col;
        }

        public String getFinger(String hand) {
            String finger = hand.equals("right") ? "R" : "L";

            if (this.col == 0) finger = "L";
            else if (this.col == 2) finger = "R";
            else {
                int leftDist = left.getDistance(this);
                int rightDist = right.getDistance(this);

                if (leftDist < rightDist)
                    finger = "L";
                else if (rightDist < leftDist)
                    finger = "R";
            }

            return finger;
        }

        public int getDistance(Position p) {
            return Math.abs(this.row - p.row) + Math.abs(this.col - p.col);
        }
    }

}

import javax.swing.text.Position;

class Solution {
Position left;
Position right;
Position numPos;

public String solution(int[] numbers, String hand){
    String answer="";
    left=new Position(3,0);
    right=new Position(3,2);
    for (int i : numbers) {
        numPos=new Position((i-1)/3,(i-1)%3);
        if(num==0){
            numPos=new Position(3,1);
        }
        String finger=numPos.getFinger(hand);
        answer+=finger;

        if(finger.equals("L")){
            left=numPos;
        
        }else{
            right=numPos;
        }
        return answer;
    }
}

}
class Position{
int row;
int col;

public Position(int row, int col){
    this.row=row;
    this.col=col;
}
public String getFinger(String hand){
    String finger=hand.equals("right")?"R":"L";
    if(this.col==0) finger="L";
    else if(this.col==2) finger="R";
    else{
        int leftDist=left.getDistance(this);
        int rightDist=right.getDistance(this);
        
        if(leftDist<rightDist){
            finger="L";
        }else if(leftDist>rightDist){
            finger="R";
        }
        return finger;
    } 
}
public int getDistance(Position p) {
    return Math.abs(this.row - p.row) + Math.abs(this.col - p.col);
}
}