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Submission #745451

# Submission time Handle Problem Language Result Execution time Memory
745451 2023-05-20T07:09:22 Z Alexandruabcde Match (CEOI16_match) C++14
37 / 100
 2000 ms 15872 KB 
#include <bits/stdc++.h>

using namespace std;

constexpr int NMAX = 1e5 + 5;
constexpr int SIGMAX = 26;

bool exist;

int sp[NMAX];
char ans[NMAX];
string S;

void Precompute () {
    deque <char> D;
    for (int i = 0; i < S.size(); ++ i ) {
        if (D.empty() || D.back() != S[i]) {
            D.push_back(S[i]);
        }
        else {
            D.pop_back();
        }
    }

    exist = D.empty();
}

int pos[SIGMAX];
int bef[NMAX];

void Solve (int st, int dr) {
    if (st > dr) return;

    deque <char> D;
    int last = -1;

    for (int j = st+1; j <= dr; ++ j ) {
        if (ans[j] == ')') {
            if (D.empty() || D.back() != S[j])
                break;

            D.pop_back();
            continue;
        }

        if (D.empty() || D.back() != S[j]) {
            if (D.empty() && S[st] == S[j])
                last = j;

            D.push_back(S[j]);
        }
        else {
            D.pop_back();
        }
    }

    ans[st] = '(';
    ans[last] = ')';

    Solve(st+1, last-1);
    Solve(last+1, dr);
}

void Solve () {
    Solve(0, S.size()-1);

    for (int i = 0; i < S.size(); ++ i )
        cout << ans[i];
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    cin >> S;

    Precompute();

    if (!exist) {
        cout << -1 << '\n';
        return 0;
    }

    Solve();

    return 0;
}

Compilation message

match.cpp: In function 'void Precompute()':
match.cpp:16:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |     for (int i = 0; i < S.size(); ++ i ) {
      |                     ~~^~~~~~~~~~
match.cpp: In function 'void Solve()':
match.cpp:67:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   67 |     for (int i = 0; i < S.size(); ++ i )
      |                     ~~^~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct

Subtask #2
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 4 ms 844 KB Output is correct
7 Correct 2 ms 596 KB Output is correct

Subtask #3
0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 4 ms 844 KB Output is correct
7 Correct 2 ms 596 KB Output is correct
8 Correct 5 ms 500 KB Output is correct
9 Correct 41 ms 1808 KB Output is correct
10 Correct 29 ms 1400 KB Output is correct
11 Correct 47 ms 2552 KB Output is correct
12 Execution timed out 2057 ms 15872 KB Time limit exceeded
13 Halted 0 ms 0 KB -