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.
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N-Dimensional Array Slice
Check if number exists in vector
matrix of natural number
Sum the 'edge' values of a matrix
Basic arrays operations.
Celsius to Kelvin
Number of vertices of a hypercube
Periodic Table II 101.
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