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Update number/fft.cc

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subcrip 2024-09-02 21:28:49 +08:00
parent 9c625c0fd3
commit a1dea908c1
1 changed files with 1 additions and 0 deletions
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number/fft.cc
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@ -44,5 +44,6 @@ vector<int> multiply(const vector<int>& a, const vector<int>& b) {
fft(A, true); fft(A, true);
vector<int> res(n); vector<int> res(n);
transform(A.begin(), A.end(), res.begin(), expr(int(round(x.real())), auto&& x)); transform(A.begin(), A.end(), res.begin(), expr(int(round(x.real())), auto&& x));
res.resize(a.size() + b.size() - 1);
return res; return res;
} }