Find the peak 3n+1 sequence value
Return the first and last character of a string
Set the array elements whose value is 13 to 0
Get the elements of diagonal and antidiagonal for any m-by-n matrix
Spot the First Occurrence of 5
Find the longest sequence of 1's in a binary sequence.
Replace NaNs with the number that appears to its left in the row.
Find the two-word state names
Sort a list of complex numbers based on far they are from the origin.
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