제출 #1086554

#제출 시각아이디문제언어결과실행 시간메모리
1086554juicy괄호 문자열 (CEOI16_match)C++17
100 / 100
10 ms12104 KiB
#include <bits/stdc++.h> using namespace std; #ifdef LOCAL #include "debug.h" #else #define debug(...) 42 #endif const int N = 1e5, C = 26; int n; array<int, C> p[N]; string s, res; void solve(int l, int r) { if (l > r) { return; } int c = s[l] - 'a'; int m = p[r][c]; if (m < l) { cout << -1; exit(0); } res[l] = '(', res[m] = ')'; solve(l + 1, m - 1); solve(m + 1, r); } int main() { ios::sync_with_stdio(false); cin.tie(nullptr); cin >> s; n = s.size(); p[0].fill(-1); p[0][s[0] - 'a'] = 0; for (int i = 1; i < n; ++i) { for (int j = 0; j < C; ++j) { if (j == s[i] - 'a') { p[i][j] = i; } else if (p[i - 1][s[i] - 'a'] > 0) { p[i][j] = p[p[i - 1][s[i] - 'a'] - 1][j]; } else { p[i][j] = -1; } } } res.resize(n); solve(0, n - 1); cout << res; return 0; }
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