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authormzuenni <mzuenni@users.noreply.github.com>2024-07-28 22:54:40 +0200
committerGitHub <noreply@github.com>2024-07-28 22:54:40 +0200
commit8d11c6c8213f46f0fa19826917c255edd5d43cb1 (patch)
tree96d75baff33d5a04b5a60f1a41f514a26c716874 /content/math/cycleDetection.cpp
parent8c33b4e0d3030cfed17fc64b4fe41133339f6d87 (diff)
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 <noob999noob999@gmail.com>
Diffstat (limited to 'content/math/cycleDetection.cpp')
-rw-r--r--content/math/cycleDetection.cpp18
1 files changed, 18 insertions, 0 deletions
diff --git a/content/math/cycleDetection.cpp b/content/math/cycleDetection.cpp
new file mode 100644
index 0000000..5e68c0c
--- /dev/null
+++ b/content/math/cycleDetection.cpp
@@ -0,0 +1,18 @@
+pair<ll, ll> cycleDetection(ll x0, function<ll(ll)> f) {
+ ll a = x0, b = f(x0), length = 1;
+ for (ll power = 1; a != b; b = f(b), length++) {
+ if (power == length) {
+ power *= 2;
+ length = 0;
+ a = b;
+ }}
+ ll start = 0;
+ a = x0; b = x0;
+ for (ll i = 0; i < length; i++) b = f(b);
+ while (a != b) {
+ a = f(a);
+ b = f(b);
+ start++;
+ }
+ return {start, length};
+}