Submission #631202

#	Time	Username	Problem	Language	Result	Execution time	Memory
631202		MilosMilutinovic	Superpozicija (COCI22_superpozicija)	C++14	0 / 110	13 ms	468 KiB

Main

/**
 *    author:  wxhtzdy
 *    created: 17.08.2022 19:58:30
**/
#include <bits/stdc++.h>

using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);  
  int tt;
  cin >> tt;
  while (tt--) {
    int n;
    cin >> n;
    string s;
    cin >> s;
    vector<int> a(n);
    vector<int> b(n);
    for (int i = 0; i < n; i++) {
      cin >> a[i] >> b[i];
      --a[i]; --b[i];
    }      
    string str = string(n, '?');
    for (int i = 0; i < n; i++) {
      if (s[a[i]] == s[b[i]]) {
        str[i] = s[a[i]];
      }
    }
    int cnt = 0;
    for (int i = 0; i < n; i++) {
      if (str[i] == '?') {
        cnt += 1;
      }
    }
    assert(cnt == 0);
    vector<int> mn(n + 1);
    for (int i = n - 1; i >= 0; i--) {
      int x = 0;
      if (str[i] == '(') {
        x = +1;        
      }
      if (str[i] == ')') {
        x = -1;        
      }
      mn[i] = min(x, x + mn[i + 1]);
    }
    int bal = 0;
    for (int i = 0; i < n; i++) {
      if (str[i] == '(') {
        bal += 1;
        continue;
      }
      if (str[i] == ')') {
        bal -= 1;
        continue;
      }
      if (bal > 0 && bal + mn[i + 1] > 0) {
        str[i] = ')';
        bal -= 1;  
      } else {
        str[i] = '(';
        bal += 1;     
      }
    } 
    bal = 0;  
    bool ok = true;
    for (int i = 0; i < n; i++) {
      bal += (str[i] == '(' ? +1 : -1);
      if (bal < 0) {
        ok = false;
      }      
    }
    if (bal == 0 && ok) {
      for (int i = 0; i < n; i++) {
        cout << 0 << " ";
      }
      cout << '\n';
    } else {
      cout << -1 << '\n';
    }
  }                                                                  
  return 0;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 20
• Subtask 4: 0 / 70