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/ntt.cpp | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) create mode 100644 content/math/transforms/ntt.cpp (limited to 'content/math/transforms/ntt.cpp') diff --git a/content/math/transforms/ntt.cpp b/content/math/transforms/ntt.cpp new file mode 100644 index 0000000..ca605d3 --- /dev/null +++ b/content/math/transforms/ntt.cpp @@ -0,0 +1,23 @@ +constexpr ll mod = 998244353, root = 3; + +void ntt(vector& a, bool inv = false) { + int n = sz(a); + auto b = a; + ll r = inv ? powMod(root, mod - 2, mod) : root; + + for (int s = n / 2; s > 0; s /= 2) { + ll ws = powMod(r, (mod - 1) / (n / s), mod), w = 1; + for (int j = 0; j < n / 2; j += s) { + for (int k = j; k < j + s; k++) { + ll u = a[j + k], t = a[j + s + k] * w % mod; + b[k] = (u + t) % mod; + b[n/2 + k] = (u - t + mod) % mod; + } + w = w * ws % mod; + } + swap(a, b); + } + if (inv) { + ll div = powMod(n, mod - 2, mod); + for (auto& x : a) x = x * div % mod; +}} -- cgit v1.2.3