LeetCode题解(1041)：困于环中的机器人(Python)

题目：原题链接（中等）

标签：数学、几何

解法	时间复杂度	空间复杂度	执行用时
Ans 1 (Python)	O ( N ) O(N) O(N)	O ( 1 ) O(1) O(1)	40ms (58.27%)
Ans 2 (Python)
Ans 3 (Python)

解法一：

class Solution:
    def isRobotBounded(self, instructions: str) -> bool:
        x, y, d = 0, 0, 0
        direction = [(0, 1), (1, 0), (0, -1), (-1, 0)]

        for ch in instructions * 4:
            if ch == "L":
                d = (d - 1) % 4
            elif ch == "R":
                d = (d + 1) % 4
            else:
                x += direction[d][0]
                y += direction[d][1]

        return x == 0 and y == 0