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Convolution(empty, long_array) take O(N) time #95

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yosupo06 opened this issue Jan 18, 2021 · 0 comments
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Convolution(empty, long_array) take O(N) time #95

yosupo06 opened this issue Jan 18, 2021 · 0 comments

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vector<modint998244353> a(0), b(1_000_000);

atcoder::convolution(a, b); // it consumes long time!

We shouldn't run copy-constructor when convolution(empty, long_array) is called
yosupo06 added a commit that referenced this issue Jan 18, 2021
@yosupo06
#95: fix convolution
04af374
yosupo06 added a commit that referenced this issue Jan 18, 2021
@yosupo06
Merge pull request #96 from atcoder/patch/issue95
752830c 
#95: fix convolution
@yosupo06 yosupo06 mentioned this issue Jan 18, 2021
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