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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63 Solutions
18 Solvers

Last Solution submitted on Aug 16, 2022

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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

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 42785. Choose group with people

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Last 200 Solutions

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Problem Recent Solvers18

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