From 8d11c6c8213f46f0fa19826917c255edd5d43cb1 Mon Sep 17 00:00:00 2001 From: mzuenni Date: Sun, 28 Jul 2024 22:54:40 +0200 Subject: Test (#4) * update * moved content in subdir * rename file * add test setup * add test setup * add github action * automaticly test all cpp files * timeout after 10s * setulimit and dont zero memory * test build pdf * install latexmk * update * update * ngerman * fonts * removed old code * add first test * added tests * test in sorted order * more tests * simplified test * more tests * fix suffix tree * fixes and improvements * done ust lst directly * fix swap * add links to pdf * fix constants * add primorial * add comment * various improvements * more tests * added missing stuf * more tests * fix tests * more tests * more tests * more tests * fix recursion? * test trie * more tests * only use python temporarily for listings * only use python temporarily for listings * more tests * fix longestCommonSubstring * more tests * more tests * made code more similiar * fix? * more tests * more tests * more tests * add ahoCorasick test + limit 4GB stack size * more tests * fix test * add additional test * more tests * more tests * fix? * better fix * fix virtual tree * more tests * more tests * recursive closest pair * more tests * decrease limit * new tests * more tests * fix name * more tests * add test * new test * more tests * more tests * more tests * more tests * new test and content * new code * new code * larger tests * fix and test * new test * new test * update pdf * remove comments * new test * more tests * more testcases * more tests * increased limit * more tests * more tests * more tests * new tests * more tests * shortened code * new test * add basic tests for bigint * more tests * removed old files * new test * ignore some files * more auto more ccw * fix test * more tests * fix * new tests * more tests * more tests * stronger test * actually verify delaunay... * more tests * fix header * more tests * run tests parallel? * test parralel? * add --missing * separate workflows * test * is the pdf checked? * separate workflows * fix workflow * more workflows --------- Co-authored-by: Yidi --- content/math/transforms/fftMul.cpp | 15 +++++++++++++++ 1 file changed, 15 insertions(+) create mode 100644 content/math/transforms/fftMul.cpp (limited to 'content/math/transforms/fftMul.cpp') diff --git a/content/math/transforms/fftMul.cpp b/content/math/transforms/fftMul.cpp new file mode 100644 index 0000000..660ed79 --- /dev/null +++ b/content/math/transforms/fftMul.cpp @@ -0,0 +1,15 @@ +vector mul(vector& a, vector& b) { + int n = 1 << (__lg(sz(a) + sz(b) - 1) + 1); + vector c(all(a)), d(n); + c.resize(n); + for (int i = 0; i < sz(b); i++) c[i] = {real(c[i]), b[i]}; + fft(c); + for (int i = 0; i < n; i++) { + int j = (n - i) & (n - 1); + cplx x = (c[i] + conj(c[j])) / cplx{2, 0}; //fft(a)[i]; + cplx y = (c[i] - conj(c[j])) / cplx{0, 2}; //fft(b)[i]; + d[i] = x * y; + } + fft(d, true); + return d; +} -- cgit v1.2.3