Problem 42785. Choose group with people

Created by Pritom Kumar Mondal

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<div style = "text-align: start; line-height: 20.4333px; min-height: 0px; white-space: normal; color: rgb(0, 0, 0); font-family: Menlo, Monaco, Consolas, monospace; font-style: normal; font-size: 14px; font-weight: 400; text-decoration: rgb(0, 0, 0); white-space: normal; "><div style="block-size: 51px; display: block; min-width: 0px; padding-block-start: 0px; padding-top: 0px; perspective-origin: 407px 25.5px; transform-origin: 407px 25.5px; vertical-align: baseline; "><div style="block-size: 21px; font-family: Helvetica, Arial, sans-serif; line-height: 21px; margin-block-end: 9px; margin-block-start: 2px; margin-bottom: 9px; margin-inline-end: 10px; margin-inline-start: 4px; margin-left: 4px; margin-right: 10px; margin-top: 2px; perspective-origin: 384px 10.5px; text-align: left; transform-origin: 384px 10.5px; white-space: pre-wrap; margin-left: 4px; margin-top: 2px; margin-bottom: 9px; margin-right: 10px; "><span style="block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 331.5px 8px; transform-origin: 331.5px 8px; unicode-bidi: normal; "><span style="">How many ways can you choose n groups of n people from n^2 people, assuming the groups are distinct?</span></span></div><div style="block-size: 21px; font-family: Helvetica, Arial, sans-serif; line-height: 21px; margin-block-end: 9px; margin-block-start: 2px; margin-bottom: 9px; margin-inline-end: 10px; margin-inline-start: 4px; margin-left: 4px; margin-right: 10px; margin-top: 2px; perspective-origin: 384px 10.5px; text-align: left; transform-origin: 384px 10.5px; white-space: pre-wrap; margin-left: 4px; margin-top: 2px; margin-bottom: 9px; margin-right: 10px; "><span style="block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 123px 8px; transform-origin: 123px 8px; unicode-bidi: normal; "><span style="">The number of people is given in input.</span></span></div></div></div>

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62 Solutions
18 Solvers

Last Solution submitted on Jun 20, 2022

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4 Comments

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James on 29 Mar 2016

Please fix the test suite so rounding isn't required to get the correct answer for x=25.

David Verrelli on 1 Dec 2017

I agree with James: for test 3 the true answer is 623360743125120. It should also be clarified in the problem statement that the function input "x" corresponds to n² (not n). Lastly, it is better not to format the problem statement as if it were code.

Rafael S.T. Vieira on 6 Aug 2020

I agree with everyone. My guess is that the author was using the short format for numbers and just copied 6.2336e+14. If you write format long and do the calculation again, you may see the correct answer.

Dyuman Joshi on 20 Jun 2022 at 5:31

The test suite has been corrected for precision error. The format of the problem statement has been changed, however, the language seems fine.

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Problem 42785. Choose group with people

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Problem Recent Solvers18

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Problem 42785. Choose group with people

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Last 200 Solutions

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Problem Recent Solvers18

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