Problem description
Given two circles of different sizes whose centers are at the origin in a two-dimensional Cartesian coordinate system with an x-axis and a y-axis. Given two integers r1, r2 representing the radii as parameters, complete the solution function so that it returns the number of points in the space between the two circles whose x- and y-coordinates are both integers.
* Count the points above each circle.

Limitations
1 ≤ r1 < r2 ≤ 1,000,000


Solve the above problem in python and explain it in Korean. The words with all capital letters should appear at least 2 times.
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