21 lines
667 B
Text
21 lines
667 B
Text
use Random;
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config const numGames = 100_000_000;
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var switch, stick: uint;
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// have a separate RNG for each task; add together the results at the end
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forall i in 1..numGames
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with (var rand = new RandomStream(uint, parSafe = false), + reduce stick)
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{
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var chosen_door = rand.getNext() % 3;
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var winner_door = rand.getNext() % 3;
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if chosen_door == winner_door then
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stick += 1;
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}
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// if you lost by sticking it means you would have won by switching
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switch = numGames - stick;
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writeln("Over ", numGames, " games:\n - switching wins ",
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100.0*switch / numGames, "% of the time and\n - sticking wins ",
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100.0*stick / numGames, "% of the time");
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