Determine Whether an array is empty
Reindex a vector
Calculate the area of a triangle between three points
Replace Nonzero Numbers with 1
Vectorize the digits of an Integer
GJam 2014 China Rd A: Library Sorting (Large)
GJam 2015 Rd1B: Counter Culture
GJam: 2013 China Event: Name Sorting
Usage of mkdir and copyfile
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