Hoc tro cua Lyde (khong chinh thuc)
(っ◔◡◔)っ ♥ My name: Kayami Aki 𝗖𝗼𝗱𝗲𝗳𝗼𝗿𝗰𝗲𝘀 𝙤𝙬𝙤: https://codeforces.com/profile/Epilogue
𝐋𝐪𝐝𝐨𝐣 𝙪𝙬𝙪: https://lqdoj.edu.vn/user/YOASOBI
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