Submission #476728

#	Time	Username	Problem	Language	Result	Execution time	Memory
476728		wiktoria_bazan	괄호 문자열 (CEOI16_match)	C++14	10 / 100	1 ms	332 KiB

match

#include <iostream>
#include <stack>
#include <algorithm>
#include <string>
#include <vector>
#include <queue>
using namespace std;

int const N = 1e5 + 9;
int n;
string s, w;
stack <char> S;
int ile[N][30];
int nt[30];
vector<int> V[30];
priority_queue<int> Q;

int check(int in, int end) {
    int a = s[in] - 'a';
    for (int i = V[a].size() - 1; i >= 0; i--) {
        int nIn = V[a][i];
        if (nIn <= in) return -1;
        if (w[nIn] == ')') continue;
        if (nIn > end) continue;
        bool t = true;
        for (int j = 0; j < 30; j++) {
            nt[j] = ile[nIn][j];
            if(in > 0)
                nt[j] -= ile[in - 1][j];
            if (nt[j] % 2 == 1) t = false;
        }
        if (t == true) return nIn;
    }
    return -1;
}

void task() {
    w = "";
    for (int i = 0; i < n; i++) {
        V[s[i] - 'a'].push_back(i);
        if (i > 0) {
            for (int j = 0; j < 30; j++) 
                ile[i][j] = ile[i - 1][j];
        }
        ile[i][s[i] - 'a']++;
        w.insert(w.size(), "0");
    }
    for (int i = 0; i < n; i++) {
        if (w[i] == ')') continue;
        w[i] = '(';
        int e;
        if (Q.empty()) e = n;
        else {
            e = -Q.top();
            while (e < i) {
                Q.pop();
                if (Q.empty()) {
                    e = n;
                    break;
                }
                e = -Q.top();
            }
        }
        int ch = check(i, e);
        if (ch == -1) {
            cout << -1;
            return;
        }
        w[ch] = ')';
        Q.push(-ch);
    }
    cout << w;
    return;
}

int main()
{
    cin >> s;
    n = s.size();
    task();
   
}

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