제출 #612243

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
612243		drdilyor	괄호 문자열 (CEOI16_match)	C++17	10 / 100	22 ms	340 KiB

match

#include <bits/stdc++.h>
#ifdef ONPC
    #include "t_debug.cpp"
#else
    #define debug(...) 42
#endif
#define sz(a) ((int)(a).size())
using namespace std;
using ll = long long;
const int INF = 1e9;
const ll INFL = 1e18;
const int RANDOM = chrono::high_resolution_clock::now().time_since_epoch().count();
mt19937 rng(RANDOM);
template<typename T, typename U> istream& operator>>(istream& is, pair<T, U>& p) { return is >> p.first >> p.second; }
const int N = 2e5, LOGN = 17, MOD = 1e9+7;

int solve(istream& cin, ostream& cout) {
    string s;
    if (!(cin >> s)) {
        return 1;
    }
    int n = s.size();
    string res(n, '?');

    auto valid = [&](int i, int j) {
        map<char,int> count;
        for (int k = i; k <= j; k++) {
            count[s[i]]++;
        }
        for (auto[k, v] : count) {
            if (v%2) return false;
        }
        int depth = 0;
        for (; i <= j; i++) {
            if (res[i] =='(')depth++;
            if (res[i] == ')')depth--;
        }
        return depth == 0;
    };

    for (int i = 0; i < n; i++) {
        if (res[i] != '?') continue;
        for (int j = n-1; j > i; j--) {
            if (s[i] != s[j]) continue;
            if (res[j] != '?') continue;

            if (valid(i+1, j-1)) {
                res[i] = '(';
                res[j] = ')';
                break;
            }
        }
        if (res[i] == '?') {
            cout << "-1\n";
            return 0;
        }
    }
    cout << res << '\n';
    return 0;
}

signed main() {
    int t = 1;
    #ifdef ONPC
    t = 10000;
    #endif
    while (t-- && cin) {
        #ifdef ONPC
        if (solve(cin, cout)) break;
            cout << "____________________" << endl;
        #else
            ifstream fin("match.in");
            ofstream fout("match.out");
            solve(cin, cout);
            break;
        #endif
    }
    return 0;
}

/*
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▒▒████████ █████    ▒▒████████ █████ █████ ▒▒███████ ▒▒██████  █████    
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*/

• Subtask 1: 10 / 10
• Subtask 2: 0 / 27
• Subtask 3: 0 / 63