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| author | Gloria Mundi <gloria@gloria-mundi.eu> | 2025-01-18 03:05:17 +0100 |
|---|---|---|
| committer | Gloria Mundi <gloria@gloria-mundi.eu> | 2025-01-18 03:08:45 +0100 |
| commit | 52ba871e0de9399f77da4b5b0d2c33a2dd6eb6a1 (patch) | |
| tree | 493152c57313f651cae92f88b6f24af2ede1b6d6 /content/math/transforms/orTransform.cpp | |
| parent | 69c98b39106cc2776f6a4983e548338ac24b5e84 (diff) | |
changes to bitwise convolutions
- modify or/and transform to remove unnecessary reversal
- or transform is now sum over subsets, add note about this
- remove old sum over subsets DP
Diffstat (limited to 'content/math/transforms/orTransform.cpp')
| -rw-r--r-- | content/math/transforms/orTransform.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/content/math/transforms/orTransform.cpp b/content/math/transforms/orTransform.cpp index d0122bf..6503a68 100644 --- a/content/math/transforms/orTransform.cpp +++ b/content/math/transforms/orTransform.cpp @@ -4,5 +4,5 @@ void fft(vector<ll>& a, bool inv = false) { for (int i = 0; i < n; i += 2 * s) { for (int j = i; j < i + s; j++) { ll& u = a[j], &v = a[j + s]; - tie(u, v) = inv ? pair(v, u - v) : pair(u + v, u); + tie(u, v) = inv ? pair(u, v - u) : pair(u, v + u); }}}} |