摘要:
最后更新 二刷 08 Jan 17 回头看了下一刷的,用的map,应该是int[256]的意思,后面没仔细看cuz whatever I was doing at that time.. wasnt good 做法和LC 76非常像,用2 Pointers + 计数来判断是否满足。 这里“有效读取” 阅读全文
摘要:
最后更新 三刷 看起来是level order traversal,但是直接硬来的话,doing this iteratively requires O(n) space for a Stack; while recursively doing this requires O(n) as well 阅读全文