結果
| 問題 |
No.649 ここでちょっとQK!
|
| コンテスト | |
| ユーザー |
みずくらげ
|
| 提出日時 | 2019-07-23 11:00:40 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 3,643 bytes |
| コンパイル時間 | 1,675 ms |
| コンパイル使用メモリ | 126,176 KB |
| 最終ジャッジ日時 | 2025-01-07 07:25:18 |
|
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 1 WA * 3 |
| other | AC * 1 WA * 31 |
ソースコード
#include <iostream>
#include <vector>
#include <string>
#include <cstring>
#include <algorithm>
#include <cmath>
#include <set>
#include <map>
#include <queue>
#include <iomanip>
#include <cassert>
#include <random>
using namespace std;
typedef long long ll;
const ll mod = 1000000007;
#define int long long
struct node_t{
int val;
node_t* lch;
node_t* rch;
int cnt;
int sum;
node_t() : val(0), cnt(1), sum(0) {lch = rch = NULL;}
node_t(int v) : val(v), cnt(1), sum(v) {lch = rch = NULL;}
};
random_device rd;
mt19937 gen(rd());
uniform_int_distribution<int> dis(0, 10000000);
struct Tree {
node_t* root;
Tree() : root(NULL) {}
Tree(node_t* t) : root(t) {}
int cnt(node_t* t) {return !t ?0 :t->cnt;}
int cnt() {return this->cnt(this->root);}
int sum(node_t* t) {return !t ?0 :t->sum;}
int sum() {return this->sum(this->root);}
node_t* update(node_t* t) {
t->cnt = cnt(t->lch) + cnt(t->rch) + 1;
t->sum = sum(t->lch) + sum(t->rch) + t->val;
return t;
}
int lowerBound(node_t* t, int val) {
if (!t) return 0;
if (val <= t->val) return lowerBound(t->lch, val);
else return cnt(t->lch) + lowerBound(t->rch, val) + 1;
}
int lowerBound(int val) {return this->lowerBound(this->root, val);}
int upperBound(node_t* t, int val) {
return lowerBound(t, val+1);
}
int upperBound(int val) {return this->lowerBound(this->root, val+1);}
int get(node_t* t, int k) {
if (!t) return -1;
if (k == cnt(t->lch)) return t->val;
if (k < cnt(t->lch)) return get(t->lch, k);
else return get(t->rch, k - cnt(t->lch) - 1);
}
int get(int k) {return get(this->root, k);}
node_t* merge(node_t* l, node_t* r) {
if (!l || !r) return !l ?r :l;
if (dis(gen) % (l->cnt + r->cnt) < l->cnt) {
l->rch = merge(l->rch, r);
return update(l);
} else {
r->lch = merge(r->lch, l);
return update(r);
}
}
void merge(Tree add) {this->root = this->merge(this->root, add.root);}
pair<node_t*, node_t*> split(node_t* t, int k) { // [0, k), [k, n)
if (!t) return make_pair(t, t);
if (k <= cnt(t->lch)) {
pair<node_t*, node_t*> s = split(t->lch, k);
t->lch = s.second;
return make_pair(s.first, update(t));
} else {
pair<node_t*, node_t*> s = split(t->rch, k - cnt(t->lch) - 1);
t->rch = s.first;
return make_pair(update(t), s.second);
}
}
Tree split(int k) {
pair<node_t*, node_t*> s = split(this->root, k);
this->root = s.first;
return Tree(s.second);
}
void insert(int val) {
pair<node_t*, node_t*> s = this->split(this->root, this->lowerBound(val));
this->root = this->merge(this->merge(s.first, new node_t(val)), s.second);
}
void erase(int val) {
if (!(this->upperBound(val) - this->lowerBound(val))) return;
pair<node_t*, node_t*> s = split(this->root, this->lowerBound(val));
this->root = this->merge(s.first, this->split(s.second, 1).second);
}
};
signed main() {
int q, k;
cin >> q >> k;
Tree tree;
int t;
for (int i = 0; i < q; i++) {
cin >> t;
if (t == 1) {
tree.insert(k);
} else {
if (tree.cnt() < k) {
cout << -1 << endl;
continue;
}
int val = tree.get(k-1);
cout << val << endl;
tree.erase(val);
}
}
return 0;
}
みずくらげ