The Preliminary Contest for ICPC Asia Shanghai 2019 B. Light bulbs(卡了线段树空间的思维题)
传送门:https://nanti.jisuanke.com/t/41399题目描述There are $N¥ light bulbs indexed from 000 to N−1N−1N−1. Initially, all of them are off.A FLIPFLIPFLIP operation switches the state of a contiguous subset ...
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2019-09-20 17:42:28 ·
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