43 lines
705 B
C
43 lines
705 B
C
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//
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// Created by maximilian on 2/9/24.
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//
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#ifndef ENDGAME_ANALYZER_FACTORIAL_H
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#define ENDGAME_ANALYZER_FACTORIAL_H
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#include <cstdint>
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namespace Factorial {
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inline std::uint64_t factorial(std::size_t n)
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{
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static const std::uint64_t table[] = {
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1,
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1 ,
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2 ,
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6 ,
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24 ,
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120 ,
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720 ,
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5040 ,
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40320 ,
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362880 ,
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3628800 ,
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39916800 ,
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479001600 ,
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6227020800 ,
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87178291200 ,
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1307674368000 ,
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20922789888000 ,
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355687428096000 ,
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6402373705728000 ,
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121645100408832000 ,
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2432902008176640000 ,
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};
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assert(n <= 20);
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return table[n];
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}
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}
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#endif //ENDGAME_ANALYZER_FACTORIAL_H
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