제출 #67340

#제출 시각아이디문제언어결과실행 시간메모리
67340MatheusLealV괄호 문자열 (CEOI16_match)C++17
37 / 100
2058 ms39164 KiB
#include <bits/stdc++.h> #define N 100050 #define f first #define s second using namespace std; typedef pair<int, int> pii; int n, v[N]; int qtd[N][30]; string s; vector<int> pos[N]; char resp[N]; int solve(int l, int r) { if(r < l) return 1; if(r - l == 1) { resp[l] = '(', resp[r] = ')'; return (v[l] == v[r]); } if(l == r) return 0; stack<int> open; for(int j = r; j > l; j--) { if(!open.empty()) { int t = open.top(); if(t == v[j]) open.pop(); else open.push(v[j]); } else { if(v[l] == v[j]) { resp[l] = '(', resp[j] = ')'; return (solve(l + 1, j - 1) and solve(j + 1, r)); } open.push(v[j]); } } return 0; } int main() { ios::sync_with_stdio(false); cin.tie(0); cin>>s; n = s.size(); for(int i = 1; i <= n; i++) v[i] = s[i - 1] - 'a'; for(int i = 1; i <= n; i++) pos[v[i]].push_back(i); for(int i = 0; i < 30; i++) for(int j = 1; j <= n; j++) qtd[j][i] = qtd[j - 1][i] + (v[j] == i); if(solve(1, n)) { for(int i = 1; i<= n; i++) cout<<resp[i]; cout<<"\n"; } else cout<<"-1\n"; }
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