結果
問題 | No.1802 Range Score Query for Bracket Sequence |
ユーザー |
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提出日時 | 2022-01-12 17:26:43 |
言語 | Java (openjdk 23) |
結果 |
AC
|
実行時間 | 628 ms / 2,000 ms |
コード長 | 3,024 bytes |
コンパイル時間 | 2,680 ms |
コンパイル使用メモリ | 80,168 KB |
実行使用メモリ | 65,396 KB |
最終ジャッジ日時 | 2024-06-30 02:21:45 |
合計ジャッジ時間 | 13,414 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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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
import java.io.*;import java.util.*;public class Main {public static void main(String[] args) throws Exception {Scanner sc = new Scanner();int n = sc.nextInt();int q = sc.nextInt();char[] parens = ("X" + sc.next() + "X").toCharArray();BinaryIndexedTree bit = new BinaryIndexedTree(n + 2);for (int i = 1; i <= n; i++) {if (parens[i] == ')' && parens[i - 1] == '(') {bit.add(i, 1);}}StringBuilder sb = new StringBuilder();for (int i = 0; i < q; i++) {int type = sc.nextInt();if (type == 1) {int idx = sc.nextInt();if (parens[idx] == '(') {parens[idx] = ')';if (parens[idx - 1] == '(') {bit.add(idx, 1);}if (parens[idx + 1] == ')') {bit.add(idx + 1, -1);}} else {parens[idx] = '(';if (parens[idx + 1] == ')') {bit.add(idx + 1, 1);}if (parens[idx - 1] == '(') {bit.add(idx, -1);}}} else {int left = sc.nextInt();int right = sc.nextInt();sb.append(bit.getSum(left + 1, right)).append("\n");}}System.out.print(sb);}}class BinaryIndexedTree {int size;int[] tree;public BinaryIndexedTree(int size) {this.size = size;tree = new int[size];}public void add(int idx, int value) {int mask = 1;while (idx < size) {if ((idx & mask) != 0) {tree[idx] += value;idx += mask;}mask <<= 1;}}public int getSum(int from, int to) {return getSum(to) - getSum(from - 1);}public int getSum(int x) {int mask = 1;int ans = 0;while (x > 0) {if ((x & mask) != 0) {ans += tree[x];x -= mask;}mask <<= 1;}return ans;}}class Scanner {BufferedReader br = new BufferedReader(new InputStreamReader(System.in));StringTokenizer st = new StringTokenizer("");public Scanner() throws Exception {}public int nextInt() throws Exception {return Integer.parseInt(next());}public long nextLong() throws Exception {return Long.parseLong(next());}public double nextDouble() throws Exception {return Double.parseDouble(next());}public String next() throws Exception {if (!st.hasMoreTokens()) {st = new StringTokenizer(br.readLine());}return st.nextToken();}}