Find the number of points (x,y) in square lattice with x^2 + y^2 =< n. This is related to Jame's Problem 1387. Here you have to find the number of points within a circle.
Project Euler: Problem 8, Find largest product in a large string of numbers
Reindex a vector
Beads on a Necklace (Convex Hulls)
Side of an equilateral triangle
Celsius to Kelvin
The almost-birthday problem.
Change the sign
Basic arrays operations.
Number of vertices of a hypercube
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