diff options
| -rw-r--r-- | hadamard_pt.hpp | 23 |
1 files changed, 14 insertions, 9 deletions
diff --git a/hadamard_pt.hpp b/hadamard_pt.hpp index f101446..a1123d5 100644 --- a/hadamard_pt.hpp +++ b/hadamard_pt.hpp @@ -81,16 +81,21 @@ public: Ms[j].tune(m, ε); } - for (unsigned j = 0; j < Ms.size() - 1; j++) { - if (this->step(j, j + 1, true)) { - std::swap(colors[j], colors[j + 1]); - colors.front() = down; - colors.back() = up; + for (unsigned j = 0; j < Ms.size() / 2; j++) { + unsigned k = 2 * j; + if (this->step(k, k + 1, true)) { + std::swap(colors[k], colors[k + 1]); + colors.front() = down; + colors.back() = up; } - if (this->step(Ms.size() - 2 - j, Ms.size() - 1 - j, true)) { - std::swap(colors[Ms.size() - 2 - j], colors[Ms.size() - 1 - j]); - colors.front() = down; - colors.back() = up; + } + + for (unsigned j = 0; j < Ms.size() / 2 - 1; j++) { + unsigned k = 2 * j + 1; + if (this->step(k, k + 1, true)) { + std::swap(colors[k], colors[k + 1]); + colors.front() = down; + colors.back() = up; } } |