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| author | mzuenni <mzuenni@users.noreply.github.com> | 2024-07-28 22:54:40 +0200 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2024-07-28 22:54:40 +0200 |
| commit | 8d11c6c8213f46f0fa19826917c255edd5d43cb1 (patch) | |
| tree | 96d75baff33d5a04b5a60f1a41f514a26c716874 /content/datastructures/lazyPropagation.cpp | |
| parent | 8c33b4e0d3030cfed17fc64b4fe41133339f6d87 (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/datastructures/lazyPropagation.cpp')
| -rw-r--r-- | content/datastructures/lazyPropagation.cpp | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/content/datastructures/lazyPropagation.cpp b/content/datastructures/lazyPropagation.cpp new file mode 100644 index 0000000..441590e --- /dev/null +++ b/content/datastructures/lazyPropagation.cpp @@ -0,0 +1,85 @@ +struct SegTree { + using T = ll; using U = ll; + int n; + static constexpr T E = 0; // Neutral element for combine + static constexpr U UF = inf; // Unused value by updates + vector<T> tree; + int h; + vector<U> lazy; + vector<int> k; // size of segments (optional) + + SegTree(const vector<T>& a) : n(sz(a) + 1), tree(2 * n, E), + //SegTree(int size, T def = E) : n(size + 1), tree(2 * n, def), + h(__lg(2 * n)), lazy(n, UF), k(2 * n, 1) { + copy(all(a), tree.begin() + n); + for (int i = n - 1; i > 0; i--) { + k[i] = 2 * k[2 * i]; + tree[i] = comb(tree[2 * i], tree[2 * i + 1]); + }} + + T comb(T a, T b) {return a + b;} // Modify this + E + + void apply(int i, U val) { // And this + UF + tree[i] = val * k[i]; + if (i < n) lazy[i] = val; // Don't forget this + } + + void push_down(int i) { + if (lazy[i] != UF) { + apply(2 * i, lazy[i]); + apply(2 * i + 1, lazy[i]); + lazy[i] = UF; + }} + + void push(int i) { + for (int s = h; s > 0; s--) push_down(i >> s); + } + + void build(int i) { + while (i /= 2) { + push_down(i); + tree[i] = comb(tree[2 * i], tree[2 * i + 1]); + }} + + void update(int l, int r, U val) { + l += n, r += n; + int l0 = l, r0 = r; + push(l0), push(r0 - 1); + for (; l < r; l /= 2, r /= 2) { + if (l&1) apply(l++, val); + if (r&1) apply(--r, val); + } + build(l0), build(r0 - 1); + } + + T query(int l, int r) { + l += n, r += n; + push(l), push(r - 1); + T resL = E, resR = E; + for (; l < r; l /= 2, r /= 2) { + if (l&1) resL = comb(resL, tree[l++]); + if (r&1) resR = comb(tree[--r], resR); + } + return comb(resL, resR); + } + + // Optional: + int lower_bound(int l, int r, T x) { + l += n, r += n; + push(l), push(r - 1); + int a[64] = {}, lp = 0, rp = 64; + for (; l < r; l /= 2, r /= 2) { + if (l&1) a[lp++] = l++; + if (r&1) a[--rp] = --r; + } + for (int i : a) if (i != 0 && tree[i] >= x) { // Modify this + while (i < n) { + push_down(i); + if (tree[2 * i] >= x) i = 2 * i; // And this + else i = 2 * i + 1; + } + return i - n; + } + return -1; + } +}; |