oj.uz

Submission #1117865

# Submission time Handle Problem Language Result Execution time Memory
1117865 2024-11-24T09:06:33 Z vjudge1 Match (CEOI16_match) C++17
100 / 100
 28 ms 26704 KB 
#include <bits/stdc++.h>
#define all(v) v.begin(), v.end()
#define int long long
using namespace std;

void f(int l, int r, string &s, string &t, vector<vector<int>> &last)
{
    if(l > r) return;
    int pos = last[r][s[l] - 'a'];
    t[l] = '(', t[pos] = ')';
    f(l + 1, pos - 1, s, t, last), f(pos + 1, r, s, t, last);
}

signed main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    
    string s;
    cin >> s;

    vector<vector<int>> last(s.size(), vector<int>(26, -1));
    stack<int> st;
    for(int i = 0; i < s.size(); i++)
    {
        if(!st.empty() && s[st.top()] == s[i]) st.pop();
        else st.push(i);
    }

    if(!st.empty())
    {
        cout << -1;
        return 0;
    }

    for(int i = 0; i < s.size(); i++)
    {
        last[i][s[i] - 'a'] = i;
        for(int j = 0; j < 26 && i > 0; j++)
        {
            int prv = last[i - 1][s[i] - 'a'];
            if(prv > 0 && s[i] - 'a' != j)
            {
                last[i][j] = last[prv - 1][j];
            }
        }
    }

    string t(s.size(), ' ');
    f(0, s.size() - 1, s, t, last);

    cout << t;
}

Compilation message

match.cpp: In function 'int main()':
match.cpp:24:22: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |     for(int i = 0; i < s.size(); i++)
      |                    ~~^~~~~~~~~~
match.cpp:36:22: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |     for(int i = 0; i < s.size(); i++)
      |                    ~~^~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct

Subtask #2
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 592 KB Output is correct
5 Correct 1 ms 592 KB Output is correct
6 Correct 1 ms 848 KB Output is correct
7 Correct 1 ms 848 KB Output is correct

Subtask #3
63.0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 592 KB Output is correct
5 Correct 1 ms 592 KB Output is correct
6 Correct 1 ms 848 KB Output is correct
7 Correct 1 ms 848 KB Output is correct
8 Correct 2 ms 1872 KB Output is correct
9 Correct 3 ms 2128 KB Output is correct
10 Correct 2 ms 2128 KB Output is correct
11 Correct 3 ms 2128 KB Output is correct
12 Correct 15 ms 16208 KB Output is correct
13 Correct 17 ms 17488 KB Output is correct
14 Correct 22 ms 19024 KB Output is correct
15 Correct 21 ms 22096 KB Output is correct
16 Correct 20 ms 22096 KB Output is correct
17 Correct 28 ms 23376 KB Output is correct
18 Correct 21 ms 23376 KB Output is correct
19 Correct 25 ms 25168 KB Output is correct
20 Correct 15 ms 16464 KB Output is correct
21 Correct 25 ms 26704 KB Output is correct