Alex_Wei ็š„ๅˆ†ๅ—็š„ๆ—ถ้—ดๅคๆ‚ๅบฆๆ˜ฏ O (n 114514) \mathcal {O (\sqrt [114514] {n})} Alex_Wei ๅฏไปฅ Hack ๆމไปปไฝ•ไบบ็š„ Hash๏ผŒไฝ†ๆ˜ฏๆฒกๆœ‰ไบบ่ƒฝ Hack ๆމ Alex_Wei ็š„ Hashใ€‚่ฟ™ๅฐฑๆž„ๆˆไบ† Alex_Wei - Hash ๆ‚–่ฎบ โ€ฆ

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