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Physics is a science that studies the interactions of energy and matter. The physics tag should be used for questions about how physics can be simulated or implemented in programming.

4 votes

Simulation of interacting particles

I don't know how fast you expect this to run, but you need to understand that the inner part of your nested loop runs 36 trillion (1000000 * 2000 * 2000 * 3 * 3) times. This means that small changes i …
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