結果
問題 | No.1786 Maximum Suffix Median (Online) |
ユーザー | 👑 Nachia |
提出日時 | 2022-01-02 18:57:13 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 226 ms / 2,000 ms |
コード長 | 3,925 bytes |
コンパイル時間 | 1,017 ms |
コンパイル使用メモリ | 88,824 KB |
実行使用メモリ | 22,736 KB |
最終ジャッジ日時 | 2024-11-15 02:01:18 |
合計ジャッジ時間 | 7,477 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
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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
6,820 KB |
testcase_01 | AC | 2 ms
6,816 KB |
testcase_02 | AC | 2 ms
6,816 KB |
testcase_03 | AC | 2 ms
6,820 KB |
testcase_04 | AC | 2 ms
6,820 KB |
testcase_05 | AC | 2 ms
6,820 KB |
testcase_06 | AC | 2 ms
6,816 KB |
testcase_07 | AC | 2 ms
6,820 KB |
testcase_08 | AC | 99 ms
14,976 KB |
testcase_09 | AC | 69 ms
11,392 KB |
testcase_10 | AC | 76 ms
12,160 KB |
testcase_11 | AC | 61 ms
10,496 KB |
testcase_12 | AC | 104 ms
15,744 KB |
testcase_13 | AC | 73 ms
14,976 KB |
testcase_14 | AC | 55 ms
12,032 KB |
testcase_15 | AC | 62 ms
13,312 KB |
testcase_16 | AC | 65 ms
13,696 KB |
testcase_17 | AC | 55 ms
11,904 KB |
testcase_18 | AC | 111 ms
16,512 KB |
testcase_19 | AC | 113 ms
16,512 KB |
testcase_20 | AC | 111 ms
16,512 KB |
testcase_21 | AC | 111 ms
16,384 KB |
testcase_22 | AC | 111 ms
16,512 KB |
testcase_23 | AC | 54 ms
20,368 KB |
testcase_24 | AC | 39 ms
13,988 KB |
testcase_25 | AC | 62 ms
21,232 KB |
testcase_26 | AC | 180 ms
13,824 KB |
testcase_27 | AC | 164 ms
12,800 KB |
testcase_28 | AC | 197 ms
14,592 KB |
testcase_29 | AC | 2 ms
6,816 KB |
testcase_30 | AC | 2 ms
6,820 KB |
testcase_31 | AC | 226 ms
16,384 KB |
testcase_32 | AC | 59 ms
22,736 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; } void meld(leftist_heap& r){ root = meld_node_norecursive(root, r.root); r.root = nullptr; r.m_size = 0; } }; 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{ 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); l.L.meld(r.L); l.R.meld(r.R); 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; int t = i%2; preans = blocks[1-t].back().mid(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"; } return 0; } struct ios_do_not_sync{ ios_do_not_sync(){ ios::sync_with_stdio(false); cin.tie(nullptr); } } ios_do_not_sync_instance;