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.
Construct a string from letters and counts
Set a diagonal
sum of non-primes
Sum the Digits of a Number
Converting numbers back from extended form
Number of vertices of a hypercube
Change the sign
Fahrenheit to Celsius converter
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