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Reference solution for the random tests is incorrect:
area(70, -175, -528)do not accept2564as answer:https://www.wolframalpha.com/input?i=area+between+y%3D70x%5E2-175x-528+and+y%3D0
Floating point errors and strict under-estimate/over-estimate means that this is a deeply flawed way of testing.
area(1, 0, -9)is exactly36, which will get truncated to35because of this. It only makes sense if you're asking for a closed-form solution of the result (which exists), but the description suggests otherside, and yet floating point error already plagues the actual tests at the moment.Please use proper floating point comparison and return the result not as a
int.(Also,
doubleshould be used.floatis too inaccurate for these kinds of tasks).This task (numerical integration of area) is a duplicate to katas such as https://www.codewars.com/kata/587c0d396d360f3cc600003f, https://www.codewars.com/kata/5562ab5d6dca8009f7000050 and https://www.codewars.com/kata/565abd876ed46506d600000d.