package y2016.d02;

import common.Files;

import java.io.FileNotFoundException;

import java.util.ArrayList;

public class Part1 {

private static class NumberPad {

private int[][] pad = {

{1, 2, 3},

{4, 5, 6},

{7, 8, 9},

};

private int posX = 1;

private int posY = 1;

public int read() {

return pad[posY][posX];

}

public void move(char direction) {

switch (direction) {

case 'U': posY = Math.max(0, posY-1); break;

case 'L': posX = Math.max(0, posX-1); break;

case 'R': posX = Math.min(2, posX+1); break;

case 'D': posY = Math.min(2, posY+1); break;

}

}

}

public static void main(String[] args) throws FileNotFoundException {

ArrayList<String> instructions = Files.readByLines("src/main/java/y2016/d02/in.txt");

NumberPad pad = new NumberPad();

for (String line: instructions) {

for (int i = 0; i < line.length(); i++) {

pad.move(line.charAt(i));

}

System.out.print(pad.read());

}

System.out.println("");

}

}