結果
| 問題 |
No.649 ここでちょっとQK!
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2021-11-12 23:03:12 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 568 ms / 3,000 ms |
| コード長 | 3,995 bytes |
| コンパイル時間 | 1,484 ms |
| コンパイル使用メモリ | 167,272 KB |
| 実行使用メモリ | 247,680 KB |
| 最終ジャッジ日時 | 2024-11-25 21:09:18 |
| 合計ジャッジ時間 | 9,136 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 32 |
ソースコード
//#include <atcoder/all>
#include <bits/stdc++.h>
using namespace std;
using lint = long long;
constexpr lint mod = 998244353;
#define all(x) begin(x), end(x)
#define bitcount(n) __builtin_popcountll((lint)(n))
#define fcout cout << fixed << setprecision(15)
#define highest(x) (63 - __builtin_clzll(x))
#define rep(i, n) for(int i = 0; i < int(n); i++)
#define rep2(i, l, r) for(int i = int(l); i < int(r); i++)
#define repr(i, n) for(int i = int(n) - 1; i >= 0; i--)
#define repr2(i, l, r) for(int i = int(r) - 1; i >= int(l); i--)
constexpr int inf9 = 1e9; constexpr lint inf18 = 1e18;
inline void Yes(bool condition){ if(condition) cout << "Yes" << endl; else cout << "No" << endl; }
template<class itr> void array_output(itr start, itr goal){ for(auto i = start; i != goal; i++) cout << (i == start ? "" : " ") << (*i); cout << endl; }
template<class itr> void cins(itr first, itr last){ for(auto i = first; i != last; i++){ cin >> (*i); } }
template<class T> T gcd(T a, T b){ if(b) return gcd(b, a % b); else return a; }
template<class T> T lcm(T a, T b){ return a / gcd(a, b) * b; }
template<class T> bool chmax(T &a, const T &b){ if(a < b){ a = b; return 1; } return 0; }
template<class T> bool chmin(T &a, const T &b){ if(b < a){ a = b; return 1; } return 0; }
inline int has(lint i, int j){ return (i >> j) & 1; }
int dy[4] = {1, 0, -1, 0}; int dx[4] = {0, 1, 0, -1};
bool is_inside(lint y, lint x, lint H, lint W){ return (0 <= y && y < H && 0 <= x && x < W); }
struct io_init {
io_init() {
cin.tie(nullptr); cout.tie(nullptr);
std::ios::sync_with_stdio(false);
}
} io_init;
template<class T, int BIT_COUNT = -1>
struct BinaryTrie{
struct Node {
Node *child[2];
int under_cnt;
Node() : child{nullptr, nullptr}, under_cnt(0) {}
};
int B;
Node *root;
BinaryTrie() : root(new Node()) {
if(BIT_COUNT == -1){
B = numeric_limits<T>::digits + int(numeric_limits<T>::is_signed);
}else{
B = BIT_COUNT;
}
}
void insert(T x){
Node *at = root;
repr(i, B){
(at -> under_cnt)++;
bool d = ((x >> i) & 1);
if(!(at -> child[d])) (at -> child[d]) = new Node();
at = at -> child[d];
}
(at -> under_cnt)++;
}
int count(T x){
Node *at = root;
repr(i, B){
bool d = ((x >> i) & 1);
at = at -> child[d];
if(!at) return 0;
}
return at -> under_cnt;
}
bool erase(T x){
Node *at = root;
repr(i, B){
bool d = ((x >> i) & 1);
at = at -> child[d];
if(!at) return false;
}
at = root;
repr(i, B){
(at -> under_cnt)--;
bool d = ((x >> i) & 1);
at = at -> child[d];
}
(at -> under_cnt)--;
return true;
}
int size(){
return root -> under_cnt;
}
T kth_element(int k){
assert(0 <= k && k < size());
k++;
Node *at = root;
T ans = 0, one = 1;
repr(i, B){
int l_cnt = (at -> child[0] ? at -> child[0] -> under_cnt : 0);
if(k <= l_cnt){
at = at -> child[0];
}else{
at = at -> child[1];
k -= l_cnt;
ans += (one << i);
}
}
return ans;
}
};
int main(){
int q, k;
cin >> q >> k;
k--;
BinaryTrie<lint> tree;
rep(_, q){
int t;
cin >> t;
if(t == 1){
lint x;
cin >> x;
tree.insert(x);
}else{
if(tree.size() < k + 1){
cout << -1 << endl;
}else{
lint ans = tree.kth_element(k);
cout << ans << endl;
tree.erase(ans);
}
}
}
}