結果
| 問題 |
No.1802 Range Score Query for Bracket Sequence
|
| コンテスト | |
| ユーザー |
🍮かんプリン
|
| 提出日時 | 2022-01-07 23:04:34 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 408 ms / 2,000 ms |
| コード長 | 3,760 bytes |
| コンパイル時間 | 1,736 ms |
| コンパイル使用メモリ | 173,540 KB |
| 実行使用メモリ | 6,528 KB |
| 最終ジャッジ日時 | 2024-06-30 02:17:58 |
| 合計ジャッジ時間 | 7,228 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 1 |
| other | AC * 24 |
ソースコード
/**
* @FileName a.cpp
* @Author kanpurin
* @Created 2022.01.07 23:04:31
**/
#include "bits/stdc++.h"
using namespace std;
typedef long long ll;
template < class Monoid >
struct SegmentTree {
private:
using Func = std::function< Monoid(Monoid, Monoid) >;
Func F;
Monoid UNITY;
int n;
std::vector< Monoid > node;
int _binary_search(int a, int b, const std::function<bool(Monoid)> &f, Monoid &s, int k = 0, int l = 0, int r = -1) {
if (r < 0) r = n;
if (r <= a || b <= l) return n;
if (a <= l && r <= b && !f(F(s,node[k]))) {
s = F(s,node[k]);
return n;
}
if (l == r - 1) {s = F(s,node[k]); return l;}
int ret = _binary_search(a, b, f, s, 2 * k + 1, l, (r - l) / 2 + l);
return ret != n ? ret : _binary_search(a, b, f, s, 2 * k + 2, (r - l) / 2 + l, r);
}
public:
SegmentTree() {}
SegmentTree(const std::vector< Monoid > &v, const Func f, const Monoid &unity) {
F = f;
UNITY = unity;
int sz = v.size();
n = 1;
while (n < sz) n <<= 1;
node.resize(n * 2 - 1, UNITY);
for (int i = 0; i < sz; i++) node[i + n - 1] = v[i];
build();
}
SegmentTree(int m, const Monoid &val, const Func f, const Monoid &unity) {
F = f;
UNITY = unity;
n = 1;
while (n < m) n <<= 1;
node.resize(n * 2 - 1, UNITY);
if (val != UNITY) {
for (int i = 0; i < m; i++) node[i + n - 1] = val;
build();
}
}
void set(int k, const Monoid &x) {
node[n + k - 1] = x;
}
void build() {
for (int i = n - 2; i >= 0; i--) node[i] = F(node[2 * i + 1], node[2 * i + 2]);
}
void update_query(int x, const Monoid &val) {
if (x >= n || x < 0) return;
x += n - 1;
node[x] = val;
while (x > 0) {
x = (x - 1) >> 1;
node[x] = F(node[2 * x + 1], node[2 * x + 2]);
}
}
Monoid get_query(int l, int r) {
Monoid L = UNITY, R = UNITY;
if (l < 0) l = 0;
if (r < 0) return UNITY;
if (l >= n) return UNITY;
if (r >= n) r = n;
for (l += n, r += n; l < r; l >>= 1, r >>= 1) {
if (l & 1) L = F(L, node[l++ - 1]);
if (r & 1) R = F(node[--r - 1], R);
}
return F(L, R);
}
int binary_search(int l, int r, const std::function<bool(Monoid)> &f) {
Monoid s = UNITY;
int ret = _binary_search(l,r,f,s);
return ret != n ? ret : -1;
}
Monoid operator[](int x) const {
return node[n + x - 1];
}
int size() {
return n;
}
void print() {
for (int i = 0; i < n; i++) {
std::cout << i << "\t: " << node[n + i - 1] << std::endl;
}
}
};
int main() {
int n,q;cin >> n >> q;
string s;cin >> s;
vector<int> v(s.size()-1,0);
for (int i = 0; i < s.size()-1; i++) {
if (s[i] == '(' && s[i+1] == ')') v[i]=1;
}
SegmentTree<int> seg(v,[](int a,int b){return a+b;},0);
for (int _ = 0; _ < q; _++) {
int t;cin >> t;
if (t == 1) {
int x;cin >> x;x--;
s[x] = s[x]==')'?'(':')';
if (x>0) {
if (s[x-1]=='('&&s[x]==')') seg.update_query(x-1,1);
else seg.update_query(x-1,0);
}
if (x<s.size()-1) {
if (s[x]=='('&&s[x+1]==')') seg.update_query(x,1);
else seg.update_query(x,0);
}
}
else {
int l,r;cin >> l >> r;
l--;
cout << seg.get_query(l,r)-(r<s.size()&&s[r-1]=='('&&s[r]==')'?1:0) << endl;
}
}
return 0;
}
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