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For those interested, the technique needed to solve this exercises is close to the implementation of math.comb in the Python standard library (albeit using modulo 2⁶⁴ which comes for free if using unsigned integers). You can watch Raymond Hettinger's keynote "Numerical Marvels Inside Python" for more explanations.
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Matrix Tracing
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For those interested, the technique needed to solve this exercises is close to the implementation of
math.combin the Python standard library (albeit using modulo 2⁶⁴ which comes for free if using unsigned integers). You can watch Raymond Hettinger's keynote "Numerical Marvels Inside Python" for more explanations.