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Man, it takes me longer to even read a problem statement!

I think they mean 1 second of program execution time :)

To be honest I'm amazed by the times. Mine (reasonably written C) is 4ms, so 0.025ms is quite amazing. Any idea what magic does rust do inside to achieve this speed?

I thought you were trolling at first. :)

Try 500ms and divide by two every year

Moore's law and all that.