真的有些combinatorics的题目,如果我们俩思路一致,等我算下来,比弟弟慢了好几分钟.
我才看了一本combinatorics的数,人家建议10!到12!的都能随口报出来..
我连5!都得手写算下来.
真的有些combinatorics的题目,如果我们俩思路一致,等我算下来,比弟弟慢了好几分钟.
我才看了一本combinatorics的数,人家建议10!到12!的都能随口报出来..
我连5!都得手写算下来.
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