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lightoj1067

maksyuki 发表于 oj 分类,标签:
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lightoj1067

1067 - Combinations

For example, say there are 4 items; you want to take 2 of them. So, you can do it 6 ways.Given n different objects, you want to take k of them. How many ways to can do it?

Input

Input starts with an integer T (≤ 2000), denot >>继续阅读