Generate a square wave of desired length, number of complete cycles and duty cycle. Here, duty cycle is defined as the fraction of a complete cycle for which the cycle is at high value. Loops are not allowed.
Remove any row in which a NaN appears
Which values occur exactly three times?
Sums with Excluded Digits
Implement simple rotation cypher
Magnet and Iron
Elements with highest local average
Diagonal of a Spiral Matrix
birthday on same day of week
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