Parse and evaluate expressions like these:
'1 + 2'
'51 - 78'
'42 * 9'
The only operators are +, -, *.
Both arguments will be integers between -50 and 50.
Sum all integers from 1 to 2^n
Spot the rectangle
Count up then down
Spot the First Occurrence of 5
Convert double scalar to half-precision floating point (IEEE 754r)
Sum the elements in either diagonal of a square matrix
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