結果
| 問題 | No.182 新規性の虜 |
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2016-03-24 20:30:00 |
| 言語 | C++11(廃止可能性あり) (gcc 13.3.0 + boost 1.89.0) |
| 結果 |
RE
|
| 実行時間 | - |
| コード長 | 5,518 bytes |
| 記録 | |
| コンパイル時間 | 1,296 ms |
| コンパイル使用メモリ | 88,848 KB |
| 実行使用メモリ | 8,320 KB |
| 最終ジャッジ日時 | 2024-10-02 00:14:11 |
| 合計ジャッジ時間 | 6,017 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 13 RE * 14 |
コンパイルメッセージ
main.cpp: In member function ‘bool AVLTree::increase_right()’:
main.cpp:132:1: warning: control reaches end of non-void function [-Wreturn-type]
132 | }
| ^
main.cpp: In member function ‘bool AVLTree::increase_left()’:
main.cpp:146:1: warning: control reaches end of non-void function [-Wreturn-type]
146 | }
| ^
ソースコード
#include <memory>
#include <iostream>
#include <vector>
class AVLTree {
enum class Bias : char {
Left, Right, Equal
};
using Key = int;
using Value = bool;
public:
AVLTree(const Key &, const Value & = Value{}, std::unique_ptr<AVLTree> && = { nullptr }, std::unique_ptr<AVLTree> && = { nullptr }, const Bias & = Bias::Equal);
AVLTree();
void insert(const Key &, const Value &);
Value &operator[](const Key &);
bool has_key(const Key &) const;
void erase(const Key &);
private:
Value val;
std::unique_ptr<AVLTree> left, right;
Key key;
Bias bias;
bool initialized;
bool sub_insert(const Key &, const Value &);
void turn_right();
void turn_left();
void double_right();
void double_left();
bool increase_right();
bool increase_left();
bool reduce_right();
bool reduce_left();
const AVLTree* leften() const;
bool erase_leften();
bool sub_erase(const Key &);
bool is_not_leaf() const;
};
AVLTree::AVLTree(const Key &k, const Value &v, std::unique_ptr<AVLTree> &&l, std::unique_ptr<AVLTree> &&r, const Bias &b) :key{ k }, val{ v }, left{ std::move(l) }, right{ std::move(r) }, bias{ b }, initialized{ true } {};
AVLTree::AVLTree() :key{}, val{}, left{ nullptr }, right{ nullptr }, bias{ Bias::Equal }, initialized{ false } {};
void AVLTree::insert(const Key &k, const Value &v) {
if (initialized) sub_insert(k, v);
else {
key = k; val = v; initialized = true;
}
}
AVLTree::Value &AVLTree::operator[](const Key &k) {
if (k == key) {
return val;
}
else if (k < key) {
return left->operator[](k);
}
else {
return right->operator[](k);
}
}
bool AVLTree::has_key(const Key &k) const {
if (k == key) return true;
else if (k < key && left) return left->has_key(k);
else if (k > key && right) return right->has_key(k);
return false;
}
void AVLTree::erase(const Key &k) {
if (initialized) {
if (k == key) initialized = false;
else sub_erase(k);
}
}
bool AVLTree::sub_insert(const Key &k, const Value &v) {
if (k < key) {
if (!left || left->sub_insert(k, v)) {
if (!left) left = std::unique_ptr<AVLTree>(new AVLTree(k, v));
return increase_left();
}
else return false;
}
else if (k > key) {
if (!right || right->sub_insert(k, v)) {
if (!right) right = std::unique_ptr<AVLTree>(new AVLTree(k, v));
return increase_right();
}
else return false;
}
return false;
}
void AVLTree::turn_right() {
switch (left->bias) {
case Bias::Equal:
right = std::unique_ptr<AVLTree>(new AVLTree(key, val, std::move(left->right), std::move(right), Bias::Left));
bias = Bias::Right;
break;
case Bias::Left:
right = std::unique_ptr<AVLTree>(new AVLTree(key, val, std::move(left->right), std::move(right), Bias::Equal));
bias = Bias::Equal;
}
key = left->key; val = left->val;
left = std::move(left->left);
}
void AVLTree::turn_left() {
switch (right->bias) {
case Bias::Equal:
left = std::unique_ptr<AVLTree>(new AVLTree(key, val, std::move(left), std::move(right->left), Bias::Right));
bias = Bias::Left;
break;
case Bias::Right:
left = std::unique_ptr<AVLTree>(new AVLTree(key, val, std::move(left), std::move(right->left), Bias::Equal));
bias = Bias::Equal;
}
key = right->key; val = right->val;
right = std::move(right->right);
}
void AVLTree::double_right() {
left->turn_left();
turn_right();
}
void AVLTree::double_left() {
right->turn_right();
turn_left();
}
bool AVLTree::increase_right() {
switch (bias) {
case Bias::Equal:
bias = Bias::Right; return true; break;
case Bias::Left:
bias = Bias::Equal; return false; break;
case Bias::Right:
switch (right->bias) {
case Bias::Equal: turn_left(); return true; break;
case Bias::Left: double_left(); return false; break;
case Bias::Right: turn_left(); return false;
}
}
}
bool AVLTree::increase_left() {
switch (bias) {
case Bias::Equal:
bias = Bias::Left; return true; break;
case Bias::Right:
bias = Bias::Equal; return false; break;
case Bias::Left:
switch (left->bias) {
case Bias::Equal: turn_right(); return true; break;
case Bias::Right: double_right(); return false; break;
case Bias::Left: turn_right(); return false;
}
}
}
bool AVLTree::reduce_right() {
return !increase_left();
}
bool AVLTree::reduce_left() {
return !increase_right();
}
const AVLTree* AVLTree::leften() const {
if (left) return left->leften();
else return this;
}
bool AVLTree::erase_leften() {
if (left->left) {
if (left->erase_leften()) return reduce_left();
else return false;
}
else {
left = std::move(left->right);
return true;
}
}
bool AVLTree::sub_erase(const Key &k) {
if (k < key) {
if (left->is_not_leaf()) {
if (left->sub_erase(k)) return reduce_left();
else return false;
}
else {
left.reset();
return bool(right);
}
}
else if (k > key) {
if (right->is_not_leaf()) {
if (right->sub_erase(k)) return reduce_right();
else return false;
}
else {
right.reset();
return bool(left);
}
}
else {
if (right) {
auto l = right->leften();
val = l->val; key = l->key;
if (right->erase_leften()) return reduce_right();
else return false;
}
else {
*this = std::move(*left);
return true;
}
}
};
bool AVLTree::is_not_leaf() const {
return right || left;
}
int main() {
AVLTree root;
int n;
std::cin >> n;
std::vector<int> vector(n);
for (auto &v:vector){
std::cin >> v;
if (root.has_key(v)) root[v] = false;
else root.insert(v, true);
}
int sum = 0;
for (const auto &v:vector){
if (root[v]) ++sum;
}
std::cout << sum << std::endl;
return 0;
}