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I'm‧泥〃 last won the day on June 3 2016
I'm‧泥〃 had the most liked content!
June 13, 2016
June 5, 2016
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排列和組合的問題...什麼時候用p還c
還有像要不要*階乘阿....
(學測這裡會考很多嗎= =?)