結果
問題 | No.1786 Maximum Suffix Median (Online) |
ユーザー | 👑 Nachia |
提出日時 | 2021-12-15 00:59:26 |
言語 | C++17 (gcc 13.2.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 408 ms / 2,000 ms |
コード長 | 5,429 bytes |
コンパイル時間 | 893 ms |
コンパイル使用メモリ | 88,756 KB |
実行使用メモリ | 22,496 KB |
最終ジャッジ日時 | 2023-10-01 02:16:40 |
合計ジャッジ時間 | 8,475 ms |
ジャッジサーバーID (参考情報) |
judge14 / judge15 |
(要ログイン)
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
4,376 KB |
testcase_01 | AC | 1 ms
4,376 KB |
testcase_02 | AC | 2 ms
4,380 KB |
testcase_03 | AC | 2 ms
4,376 KB |
testcase_04 | AC | 1 ms
4,380 KB |
testcase_05 | AC | 2 ms
4,376 KB |
testcase_06 | AC | 1 ms
4,376 KB |
testcase_07 | AC | 2 ms
4,380 KB |
testcase_08 | AC | 312 ms
14,940 KB |
testcase_09 | AC | 180 ms
11,348 KB |
testcase_10 | AC | 229 ms
12,212 KB |
testcase_11 | AC | 190 ms
10,292 KB |
testcase_12 | AC | 324 ms
15,460 KB |
testcase_13 | AC | 80 ms
14,984 KB |
testcase_14 | AC | 60 ms
12,136 KB |
testcase_15 | AC | 69 ms
13,128 KB |
testcase_16 | AC | 72 ms
13,352 KB |
testcase_17 | AC | 58 ms
11,976 KB |
testcase_18 | AC | 408 ms
16,252 KB |
testcase_19 | AC | 393 ms
16,260 KB |
testcase_20 | AC | 380 ms
16,252 KB |
testcase_21 | AC | 375 ms
16,260 KB |
testcase_22 | AC | 394 ms
16,260 KB |
testcase_23 | AC | 53 ms
20,596 KB |
testcase_24 | AC | 40 ms
14,068 KB |
testcase_25 | AC | 60 ms
21,236 KB |
testcase_26 | AC | 196 ms
13,604 KB |
testcase_27 | AC | 171 ms
12,564 KB |
testcase_28 | AC | 211 ms
14,564 KB |
testcase_29 | AC | 2 ms
4,376 KB |
testcase_30 | AC | 1 ms
4,380 KB |
testcase_31 | AC | 249 ms
16,248 KB |
testcase_32 | AC | 58 ms
22,496 KB |
ソースコード
#include <iostream> #include <vector> #include <algorithm> #include <queue> using namespace std; using i32 = int32_t; using u32 = uint32_t; using i64 = int64_t; using u64 = uint64_t; #define rep(i,n) for(int i=0; i<(n); i++) template<class Elem> struct leftist_heap{ struct Node{ Node* l; Node* r; int height; Elem key; }; Node* root; int m_size; leftist_heap(){ root = nullptr; m_size = 0; } static Node* meld_node_norecursive(Node* root, Node* anotherroot){ if(anotherroot == nullptr){ return root; } if(root == nullptr){ root = anotherroot; return root; } std::vector<Node*> st; st.reserve(root->height + anotherroot->height); Node** p1 = &root; Node** p2 = &anotherroot; while(true){ if(*p1 == nullptr){ *p1 = *p2; break; } if((*p1)->key < (*p2)->key) std::swap(*p1, *p2); st.push_back(*p1); p1 = &(*p1)->r; } auto st_ritr = st.rbegin(); while(st_ritr != st.rend()){ Node* c = *st_ritr; if(c->l == nullptr){ std::swap(c->l, c->r); c->height = 1; } else if(c->r == nullptr){ c->height = 1; } else{ if(c->l->height < c->r->height){ std::swap(c->l, c->r); } c->height = c->r->height + 1; } st_ritr++; } return root; } void push(const Elem& val){ Node* new_node = new Node(); new_node->height = 1; new_node->l = nullptr; new_node->r = nullptr; new_node->key = val; root = meld_node_norecursive(root, new_node); m_size += 1; } Elem top(){ return root->key; } void pop(){ auto old_root = root; root = meld_node_norecursive(old_root->l, old_root->r); delete(old_root); m_size -= 1; } int size(){ return m_size; } }; struct less_int{ int a; bool operator<(less_int& r) const { return a < r.a; } }; struct greater_int{ int a; bool operator<(greater_int& r) const { return a > r.a; } }; /* struct Block{ priority_queue<int, vector<int>, less<int>> L; priority_queue<int, vector<int>, greater<int>> R; void output(){ auto Lbuf = L; cout << "L : [ "; while(Lbuf.size()){ cout << Lbuf.top() << " "; Lbuf.pop(); } cout << "] "; auto Rbuf = R; cout << "R : [ "; while(Rbuf.size()){ cout << Rbuf.top() << " "; Rbuf.pop(); } cout << "] "; cout << endl; } int mid(int newitem) const { if(L.top() > newitem) return L.top(); return newitem; } static Block make(int l, int r){ Block res; res.L.push(l); res.R.push(r); return res; } }; Block merge_blocks(Block l, Block r){ if(l.L.size() < r.L.size()) swap(l,r); while(r.L.size()){ l.L.push(r.L.top()); r.L.pop(); l.R.push(r.R.top()); r.R.pop(); } int swap_count = 0; while(l.L.top() > l.R.top()){ int lL = l.L.top(); l.L.pop(); int lR = l.R.top(); l.R.pop(); l.L.push(lR); l.R.push(lL); swap_count++; } cout << " -> " << l.L.top() << ", " << l.R.top() << endl; return move(l); } bool have_better_merge(Block& l, Block& r){ return !(l.R.top() < r.L.top()); } */ struct Block{ leftist_heap<less_int> L; leftist_heap<greater_int> R; int mid(int newitem) { if(L.top().a > newitem) return L.top().a; return newitem; } static Block make(int l, int r){ Block res; res.L.push(less_int{l}); res.R.push(greater_int{r}); return res; } }; Block merge_blocks(Block l, Block r){ if(l.L.size() < r.L.size()) swap(l,r); while(r.L.size()){ l.L.push(r.L.top()); r.L.pop(); l.R.push(r.R.top()); r.R.pop(); } int swap_count = 0; while(l.L.top().a > l.R.top().a){ int lL = l.L.top().a; l.L.pop(); int lR = l.R.top().a; l.R.pop(); l.L.push(less_int{lR}); l.R.push(greater_int{lL}); swap_count++; } return move(l); } bool have_better_merge(Block& l, Block& r){ return !(l.R.top().a < r.L.top().a); } int main() { int N; cin >> N; vector<int> A(N); int preans = 0; vector<Block> blocks[2]; rep(t,2){ blocks[t].push_back(Block::make(-2,-2)); } rep(i,N){ int a; cin >> a; a ^= preans; A[i] = a; // cout << "a = " << A[i] << endl; int t = i%2; //auto& pblock = blocks[1-t].back(); preans = blocks[1-t].back().mid(a); //if(pblock.L.top() > a) preans = pblock.L.top(); //else preans = a; if(i == 0){ blocks[t].push_back(Block::make(-1,a)); } else{ Block tmp = Block::make(min(A[i-1], A[i]), max(A[i-1], A[i])); while(true){ if(!have_better_merge(blocks[t].back(), tmp)) break; tmp = merge_blocks(blocks[t].back(), tmp); blocks[t].pop_back(); } blocks[t].push_back(move(tmp)); } cout << preans << "\n"; //cout << "process : " << endl; cout << endl; //rep(t,2){ for(auto& a : blocks[t]) a.output(); cout << endl; } //cout << endl << endl; } return 0; } struct ios_do_not_sync{ ios_do_not_sync(){ ios::sync_with_stdio(false); cin.tie(nullptr); } } ios_do_not_sync_instance;