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.
Back to basics 25 - Valid variable names
Compute a dot product of two vectors x and y
How many trades represent all the profit?
Without the French accent please!
Number of vertices of a hypercube
Change the sign
Periodic Table 101.
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