First test case is invalid. Please fix it.
I have fixed it.
and the fourth...
It must be OK now!
Word Counting and Indexing
Back to basics 5 - Clipboard
Flip the main diagonal of a matrix
Check that number is whole number
Find two triangular numbers whose sum is input.
Recaman Sequence - II
Grouped Frequency Distributions
Digit concentration in Champernowne's constant
Van Eck's Sequence's nth member
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