真的有些combinatorics的題目,如果我們倆思路一致,等我算下來,比弟弟慢了好幾分鍾.
我才看了一本combinatorics的數,人家建議10!到12!的都能隨口報出來..
我連5!都得手寫算下來.
真的有些combinatorics的題目,如果我們倆思路一致,等我算下來,比弟弟慢了好幾分鍾.
我才看了一本combinatorics的數,人家建議10!到12!的都能隨口報出來..
我連5!都得手寫算下來.
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