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2017年9月21日
[leetcode-319-Bulb Switcher]
摘要： There are n bulbs that are initially off. You first turn on all the bulbs. Then, you turn off every second bulb. On the third round, you toggle every 阅读全文
posted @ 2017-09-21 20:35 hellowOOOrld 阅读(196) 评论(0) 推荐(0) 编辑