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Submission #236763

# Submission time Handle Problem Language Result Execution time Memory
236763 2020-06-03T09:00:10 Z Sorting Match (CEOI16_match) C++14
10 / 100
 2000 ms 512 KB 
#include <bits/stdc++.h>

using namespace std;

string s;
int n;

bool solve(string &answer, int pos){
    if(answer == "" && pos == n)
        return true;
    if(answer.size() > (n - pos))
        return false;

    answer += s[pos];
    if(solve(answer, pos + 1)){
        answer += "(";
        return true;
    }
    answer.pop_back();

    if(answer != "" && answer.back() == s[pos]){
        answer.pop_back();
        if(solve(answer, pos + 1)){
            answer += ")";
            return true;
        }
        answer += s[pos];
    }

    return false;
}

int main(){
    ios::sync_with_stdio(false);
    cin.tie(NULL);

    cin >> s;
    n = s.size();

    string answer = "";
    if(solve(answer, 0)){
        reverse(answer.begin(), answer.end());
        cout << answer << "\n";
    }
    else
        cout << "-1\n";
}

Compilation message

match.cpp: In function 'bool solve(std::__cxx11::string&, int)':
match.cpp:11:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     if(answer.size() > (n - pos))
        ~~~~~~~~~~~~~~^~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 512 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct

Subtask #2
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 512 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Execution timed out 2041 ms 384 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #3
0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 512 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Execution timed out 2041 ms 384 KB Time limit exceeded
5 Halted 0 ms 0 KB -