Need a test case with a 0 on the chosen diagonal.
Agree with Jon's comment that the matrix should contain 0 elements
so simple that it never occurred to me
Find the peak 3n+1 sequence value
Return the Fibonacci Sequence
Sum of diagonal of a square matrix
Number of 1s in a binary string
Rank of magic square (for beginners)
Without the French accent please!
Generalised Hamming Number
Mysterious digits operation (easy)
Longest Collatz Sequence
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