I lost to Doug.
Return the first and last characters of a character array
Check if number exists in vector
Replace all zeros and NaNs in a matrix with the string 'error'
Doubling elements in a vector
Find out missing number from a vector of 9 elements
String substitution, sub problem to cryptoMath
How many trades represent all the profit?
Cumulative probability of finding an unlikely combination
Is this is a Tic Tac Toe X Win?
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