How many ways can you choose n groups of n people from n^2
people, assuming the groups are distinct? The number of people is given in input.
Please fix the test suite so rounding isn't required to get the correct answer for x=25.
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.
Distance walked 1D
Project Euler: Problem 2, Sum of even Fibonacci
Volume of a Parallelepiped
Replace all zeros and NaNs in a matrix with the string 'error'
odd number odd sum
How many ways to write a number
Find the number of rectangles
How many ways to write
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