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Merge pull request #46 from SSRS-cp/patch-1
Update fenwicktree.md
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document_ja/fenwicktree.md

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@@ -46,7 +46,7 @@ void fw.add(int p, T x)
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T fw.sum(int l, int r)
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```
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`a[l] + a[l - 1] + ... + a[r - 1]` を返す。
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`a[l] + a[l + 1] + ... + a[r - 1]` を返す。
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`T` が整数型(`int / uint / ll / ull`)の場合、答えがオーバーフローしたならば $\bmod 2^{\mathrm{bit}}$ で等しい値が返る。
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**@{keyword.constraints}**

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