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93 views • June 10, 2021

解說一個重要的問題:走捷徑的問題

一個重要的問題,走捷徑的問題,如果 A在左下方,B在右上方,要從A 走到B,走捷徑,表示從A開始,只能往右或者往上兩種方向,走到 B,請問有幾種走法? 這是蠻常見的問題。
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