# LeetCode - 2069. Walking Robot Simulation II
### 題目網址：https://leetcode.com/problems/walking-robot-simulation-ii/
###### tags: `LeetCode` `Medium` `模擬`

/*
    -LeetCode format-
    Problem: 2069. Walking Robot Simulation II
    Difficulty: Medium
    
    by Inversionpeter
*/



string direction[4] = { "East", "North", "West", "South" };
int dx[4] = { 1, 0, -1, 0 }, dy[4] = { 0, 1, 0, -1 }, xs[400], ys[400], directions[400] = { 3 };

class Robot {
public:
    
    int nowX, nowY, newX, newY, nowDirection, nowMove, fullRound;
    
    Robot(int width, int height) {
        nowMove = nowX = nowY = nowDirection = 0;
        fullRound = (width << 1) + (height << 1) - 4;
        for (int i = 1; i < fullRound; ++i) {
            newX = nowX + dx[nowDirection];
            newY = nowY + dy[nowDirection];
            if (newX < 0 || newY < 0 || newX >= width || newY >= height) {
                nowDirection = (nowDirection + 1) & 3;
                newX = nowX + dx[nowDirection];
                newY = nowY + dy[nowDirection];
            }
            nowX = xs[i] = newX;
            nowY = ys[i] = newY;
            directions[i] = nowDirection;
        }
        nowX = nowY = nowDirection = 0;
    }
    
    void move(int num) {
        nowMove = (nowMove + num) % fullRound;
        nowDirection = directions[nowMove];
        nowX = xs[nowMove];
        nowY = ys[nowMove];
    }
    
    vector<int> getPos() {
        return { nowX, nowY };
    }
    
    string getDir() {
        return direction[nowDirection];
    }
};

/**
 * Your Robot object will be instantiated and called as such:
 * Robot* obj = new Robot(width, height);
 * obj->move(num);
 * vector<int> param_2 = obj->getPos();
 * string param_3 = obj->getDir();
 */