실습용 로봇

export function practicalRobot(command: string): [number, number] {
  const directions = [
    [0, 1],
    [1, 0],
    [0, -1],
    [-1, 0],
  ];
  let [x, y] = [0, 0];
  let currentDirection = 0;
  for (const c of command) {
    if (c === 'R') {
      currentDirection = (currentDirection + 1) % 4;
    } else if (c === 'L') {
      currentDirection = (currentDirection + 3) % 4;
    } else if (c === 'G') {
      const [dx, dy] = directions[currentDirection];
      [x, y] = [x + dx, y + dy];
    } else {
      const [dx, dy] = directions[currentDirection];
      [x, y] = [x - dx, y - dy];
    }
  }
  return [x, y];
}