結果
問題 | No.2296 Union Path Query (Hard) |
ユーザー | t98slider |
提出日時 | 2023-03-20 20:30:57 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 583 ms / 7,000 ms |
コード長 | 6,857 bytes |
コンパイル時間 | 2,277 ms |
コンパイル使用メモリ | 200,596 KB |
実行使用メモリ | 42,368 KB |
最終ジャッジ日時 | 2024-05-02 14:23:06 |
合計ジャッジ時間 | 18,834 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
5,248 KB |
testcase_01 | AC | 19 ms
21,248 KB |
testcase_02 | AC | 19 ms
21,248 KB |
testcase_03 | AC | 19 ms
21,248 KB |
testcase_04 | AC | 178 ms
42,240 KB |
testcase_05 | AC | 173 ms
42,368 KB |
testcase_06 | AC | 231 ms
42,240 KB |
testcase_07 | AC | 262 ms
42,368 KB |
testcase_08 | AC | 259 ms
42,240 KB |
testcase_09 | AC | 240 ms
34,688 KB |
testcase_10 | AC | 286 ms
34,688 KB |
testcase_11 | AC | 278 ms
34,688 KB |
testcase_12 | AC | 264 ms
33,280 KB |
testcase_13 | AC | 173 ms
25,088 KB |
testcase_14 | AC | 154 ms
24,832 KB |
testcase_15 | AC | 268 ms
42,240 KB |
testcase_16 | AC | 274 ms
37,760 KB |
testcase_17 | AC | 249 ms
28,800 KB |
testcase_18 | AC | 443 ms
42,368 KB |
testcase_19 | AC | 427 ms
33,280 KB |
testcase_20 | AC | 455 ms
42,368 KB |
testcase_21 | AC | 462 ms
42,368 KB |
testcase_22 | AC | 583 ms
42,240 KB |
testcase_23 | AC | 257 ms
42,240 KB |
testcase_24 | AC | 229 ms
33,280 KB |
testcase_25 | AC | 228 ms
42,240 KB |
testcase_26 | AC | 225 ms
42,368 KB |
testcase_27 | AC | 268 ms
42,240 KB |
testcase_28 | AC | 239 ms
42,240 KB |
testcase_29 | AC | 189 ms
42,240 KB |
testcase_30 | AC | 194 ms
42,240 KB |
testcase_31 | AC | 207 ms
42,368 KB |
testcase_32 | AC | 218 ms
42,240 KB |
testcase_33 | AC | 276 ms
42,368 KB |
testcase_34 | AC | 169 ms
42,240 KB |
testcase_35 | AC | 205 ms
42,368 KB |
testcase_36 | AC | 386 ms
42,368 KB |
testcase_37 | AC | 245 ms
36,096 KB |
testcase_38 | AC | 251 ms
35,968 KB |
testcase_39 | AC | 234 ms
35,968 KB |
testcase_40 | AC | 238 ms
36,096 KB |
testcase_41 | AC | 2 ms
5,376 KB |
testcase_42 | AC | 1 ms
5,376 KB |
testcase_43 | AC | 2 ms
5,376 KB |
testcase_44 | AC | 240 ms
42,368 KB |
testcase_45 | AC | 246 ms
42,240 KB |
testcase_46 | AC | 265 ms
42,240 KB |
testcase_47 | AC | 294 ms
42,368 KB |
testcase_48 | AC | 277 ms
42,368 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; using ll = long long; class LinkCutTree { struct Node { Node *l, *r, *p; int key; long long sum; bool rev; explicit Node() : key(0), sum(0), rev(false), l(nullptr), r(nullptr), p(nullptr) {} bool is_root() const { return not p or (p->l != this and p->r != this); } }; void update(Node* t) { t->sum = t->key; if(t->l) t->sum += t->l->sum; if(t->r) t->sum += t->r->sum; } void rotate_right(Node* t) { Node *x = t->p, *y = x->p; if((x->l = t->r)) t->r->p = x; t->r = x, x->p = t; update(x), update(t); if((t->p = y)) { if(y->l == x) y->l = t; if(y->r == x) y->r = t; update(y); } } void rotate_left(Node* t) { Node *x = t->p, *y = x->p; if((x->r = t->l)) t->l->p = x; t->l = x, x->p = t; update(x), update(t); if((t->p = y)) { if(y->l == x) y->l = t; if(y->r == x) y->r = t; update(y); } } void toggle(Node* t) { std::swap(t->l, t->r); t->rev ^= true; } void push(Node* t) { if(t->rev) { if(t->l) toggle(t->l); if(t->r) toggle(t->r); t->rev = false; } } void splay(Node *t) { push(t); while(not t->is_root()) { Node* q = t->p; if(q->is_root()) { push(q), push(t); q->l == t ? rotate_right(t) : rotate_left(t); } else { Node* r = q->p; push(r), push(q), push(t); if(r->l == q) { if(q->l == t) rotate_right(q), rotate_right(t); else rotate_left(t), rotate_right(t); } else { if(q->r == t) rotate_left(q), rotate_left(t); else rotate_right(t), rotate_left(t); } } } } std::vector<Node*> Node_info; public: int N; LinkCutTree(int n) : N(n), Node_info(n) { for(int i = 0; i < N; i++){ Node_info[i] = new Node(); } } //vと根との間を Heavy-edge で繋げてvを木の根にする Node* expose(int v) { Node* t = Node_info[v]; Node* rp = nullptr; for(Node* cur = t; cur; cur = cur->p) { splay(cur); cur->r = rp; update(cur); rp = cur; } splay(t); return rp; } //vをもともの木の根にする void evert(int v) { expose(v); toggle(Node_info[v]); push(Node_info[v]); } void link(int _child, int _parent) { Node *child = Node_info[_child], *parent = Node_info[_parent]; evert(_child), expose(_parent); child->p = parent; parent->r = child; update(parent); } void cut(int _child) { Node *child = Node_info[_child]; expose(_child); auto *parent = child->l; child->l = nullptr; parent->p = nullptr; } bool is_connected(int u, int v) { expose(u), expose(v); return Node_info[u] == Node_info[v] or Node_info[u]->p; } const long long &query(int u, int v) { evert(u); expose(v); return Node_info[v]->sum; } void set(int p, int v) { expose(p); Node_info[p]->key = v; update(Node_info[p]); } }; struct dsu { public: int csz; dsu() : _n(0) {} dsu(int n) : _n(n), csz(n), parent_or_size(n, -1) {} int merge(int a, int b) { assert(0 <= a && a < _n); assert(0 <= b && b < _n); int x = leader(a), y = leader(b); if (x == y) return x; if (-parent_or_size[x] < -parent_or_size[y]) std::swap(x, y); csz--; parent_or_size[x] += parent_or_size[y]; parent_or_size[y] = x; return x; } bool same(int a, int b) { assert(0 <= a && a < _n); assert(0 <= b && b < _n); return leader(a) == leader(b); } int leader(int a) { assert(0 <= a && a < _n); if (parent_or_size[a] < 0) return a; return parent_or_size[a] = leader(parent_or_size[a]); } int size(int a) { assert(0 <= a && a < _n); return -parent_or_size[leader(a)]; } std::vector<std::vector<int>> groups() { std::vector<int> leader_buf(_n), group_size(_n); for (int i = 0; i < _n; i++) { leader_buf[i] = leader(i); group_size[leader_buf[i]]++; } std::vector<std::vector<int>> result(_n); for (int i = 0; i < _n; i++) { result[i].reserve(group_size[i]); } for (int i = 0; i < _n; i++) { result[leader_buf[i]].push_back(i); } result.erase( std::remove_if(result.begin(), result.end(), [&](const std::vector<int>& v) { return v.empty(); }), result.end()); return result; } private: int _n; // root node: -1 * component size // otherwise: parent std::vector<int> parent_or_size; }; int main() { ios::sync_with_stdio(false); cin.tie(0); int N, Q; ll X; cin >> N >> X >> Q; LinkCutTree LCT(N + Q); dsu uf(N); vector<ll> dia(N); vector<array<int,2>> sv(N); for(int i = 0; i < N; i++) sv[i] = {i, i}; auto update_diameter = [&](int x, int y){ ll mx; int u, v; if(dia[x] >= dia[y]){ mx = dia[x], u = sv[x][0], v = sv[x][1]; }else{ mx = dia[y], u = sv[y][0], v = sv[y][1]; } for(int i = 0; i < 2; i++){ for(int j = 0; j < 2; j++){ ll d = LCT.query(sv[x][i], sv[y][j]); if(d > mx){ mx = d, u = sv[x][i], v = sv[y][j]; } } } int r = uf.merge(x, y); dia[r] = mx; sv[r] = {u, v}; }; int type, v, u, w; for(int i = 0; i < Q; i++){ cin >> type; if(type == 1){ cin >> v >> w; LCT.link(v, i + N); LCT.link(X, i + N); LCT.set(i + N, w); update_diameter(uf.leader(v), uf.leader(X)); }else if(type == 2){ cin >> v >> u; if(!uf.same(v, u)){ cout << -1 << '\n'; continue; } ll d = LCT.query(v, u); (X += d) %= N; cout << d << '\n'; }else if(type == 3){ cin >> v; cout << dia[uf.leader(v)] << '\n'; }else{ cin >> v; X += v; if(X >= N) X -= N; } } }