Smallest distance between a point and a rectangle
Return unique values without sorting
Sum of first n terms of a harmonic progression
Test if two numbers have the same digits
Find two triangular numbers whose sum is input.
List ways to reach a target sum
Compute home primes in a given base
Count the ways pairs of parentheses can be matched correctly
Compute the sum of reciprocals of quadratics
Solve a nonlinear difference equation
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