回答編集履歴
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betu
test
CHANGED
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@@ -19,3 +19,13 @@
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19
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console.log(factorial(10000n));
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20
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```
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# 別解
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```javascript
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const factorial=x=>Array(x).fill(null).map((_,x)=>BigInt(x+1)).reduce((x,y)=>x*y);
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console.log(factorial(10000));
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```
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