baoshuo/OI-codes
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P3377 【模板】左偏树（可并堆）

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https://www.luogu.com.cn/record/99003119
This commit is contained in:
Baoshuo Ren 2023-01-08 11:43:36 +08:00
parent 1d1bce8ed4
commit 2095354fea
Signed by: baoshuo
GPG Key ID: 00CB9680AB29F51A
1 changed files with 13 additions and 8 deletions
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21
Luogu/P3377/P3377.cpp
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@ -1,4 +1,5 @@
#include <iostream> #include <iostream>
#include <functional>
#include <memory> #include <memory>
#include <stack> #include <stack>
#include <vector> #include <vector>
@ -7,19 +8,23 @@ using std::cin;
using std::cout; using std::cout;
const char endl = '\n'; const char endl = '\n';
class LeftTree : public std::enable_shared_from_this<LeftTree> { template <typename T, class Compare = std::less<T>>
class LeftistTree : public std::enable_shared_from_this<LeftistTree<T, Compare>> {
public: public:
using pointer_type = std::shared_ptr<LeftTree>; using pointer_type = std::shared_ptr<LeftistTree<T, Compare>>;
protected:
static Compare comp;
private: private:
size_t dist; size_t dist;
pointer_type lchild, rchild; pointer_type lchild, rchild;
std::weak_ptr<LeftTree> root; std::weak_ptr<LeftistTree<T, Compare>> root;
public: public:
int id, val; T id, val;
LeftTree(const int& _val = 0, const int& _id = 0) LeftistTree(const T& _val = 0, const T& _id = 0)
: dist(0), : dist(0),
lchild(nullptr), lchild(nullptr),
rchild(nullptr), rchild(nullptr),
@ -29,7 +34,7 @@ class LeftTree : public std::enable_shared_from_this<LeftTree> {
pointer_type find_root() { pointer_type find_root() {
std::stack<pointer_type> st; std::stack<pointer_type> st;
pointer_type cur = shared_from_this(); pointer_type cur = this->shared_from_this();
st.emplace(cur); st.emplace(cur);
@ -60,7 +65,7 @@ class LeftTree : public std::enable_shared_from_this<LeftTree> {
if (!x) return y; if (!x) return y;
if (!y) return x; if (!y) return x;
if (x->val > y->val || x->val == y->val && x->id > y->id) std::swap(x, y); if (comp(x->val, y->val) || x->val == y->val && comp(x->id, y->id)) std::swap(x, y);
x->rchild = merge(x->rchild, y); x->rchild = merge(x->rchild, y);
@ -84,7 +89,7 @@ int main() {
cin >> n >> m; cin >> n >> m;
std::vector<bool> exists(n + 1, true); std::vector<bool> exists(n + 1, true);
std::vector<LeftTree::pointer_type> tr(n + 1); std::vector<LeftistTree<int, std::greater<>>::pointer_type> tr(n + 1);
for (int i = 1, x; i <= n; i++) { for (int i = 1, x; i <= n; i++) {
cin >> x; cin >> x;