oj.uz

답안 #610101

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
610101 2022-07-28T04:57:36 Z juancarlovieri 괄호 문자열 (CEOI16_match) C++17
100 / 100
 14 ms 15648 KB 
#include <bits/stdc++.h>
using namespace std;

int last[100005][30];
int pas[100005];
string s;
int n;

void rek(int l, int r) {
  // cout << l << ' ' << r << endl;
  if (l > r) return;
  if (l == r) assert(0);
  if (l == r - 1) {
    assert(s[l] == s[r]);
    pas[l] = r;
    return;
  }
  int tmp = last[r][s[l] - 'a'];
  pas[l] = tmp;
  rek(l + 1, tmp - 1);
  rek(tmp + 1, r);
}

int main() {
  cin >> s;
  n = s.length();
  memset(last, -1, sizeof last);
  vector<int> a(n);
  for (int i = 0; i < n; ++i) a[i] = (s[i] - 'a');

  stack<int> st;
  for (int i = 0; i < n; ++i) {
    if (st.empty() or st.top() != a[i]) {
      st.push(a[i]);
    } else {
      st.pop();
    }
  }

  // cout << st.size() << endl;

  if (!st.empty()) {
    cout << -1 << endl;
    return 0;
  }

  for (int i = 0; i < n; ++i) {
    int cur = (s[i] - 'a');
    int prev = -1;
    if (i) {
      prev = last[i - 1][cur];
    }
    last[i][cur] = i;
    // cout << prev << endl;
    if (prev > 0) {
      for (int j = 0; j < 26; ++j) {
        if (j == cur) continue;
        last[i][j] = last[prev - 1][j];
      }
    }
  }
  // cout << last[4][0] << endl;
  memset(pas, -1, sizeof pas);
  rek(0, n - 1);
  string ans(n, '?');
  for (int i = 0; i < n; ++i) {
    if (pas[i] == -1) continue;
    ans[i] = '(';
    ans[pas[i]] = ')';
  }
  cout << ans << endl;
}

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 12372 KB Output is correct
2 Correct 6 ms 12364 KB Output is correct
3 Correct 5 ms 11988 KB Output is correct

Subtask #2
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 12372 KB Output is correct
2 Correct 6 ms 12364 KB Output is correct
3 Correct 5 ms 11988 KB Output is correct
4 Correct 5 ms 12356 KB Output is correct
5 Correct 5 ms 12340 KB Output is correct
6 Correct 5 ms 12500 KB Output is correct
7 Correct 5 ms 12372 KB Output is correct

Subtask #3
63.0 / 63.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 12372 KB Output is correct
2 Correct 6 ms 12364 KB Output is correct
3 Correct 5 ms 11988 KB Output is correct
4 Correct 5 ms 12356 KB Output is correct
5 Correct 5 ms 12340 KB Output is correct
6 Correct 5 ms 12500 KB Output is correct
7 Correct 5 ms 12372 KB Output is correct
8 Correct 6 ms 12372 KB Output is correct
9 Correct 7 ms 12500 KB Output is correct
10 Correct 6 ms 12500 KB Output is correct
11 Correct 6 ms 12604 KB Output is correct
12 Correct 10 ms 14088 KB Output is correct
13 Correct 9 ms 14420 KB Output is correct
14 Correct 10 ms 14804 KB Output is correct
15 Correct 14 ms 15540 KB Output is correct
16 Correct 12 ms 15556 KB Output is correct
17 Correct 12 ms 15648 KB Output is correct
18 Correct 12 ms 14144 KB Output is correct
19 Correct 13 ms 14784 KB Output is correct
20 Correct 10 ms 14400 KB Output is correct
21 Correct 13 ms 15316 KB Output is correct