Submission #115744

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
115744	2019-06-08T20:00:22 Z	Breno_XD	Retro (COCI17_retro)	C++14	5 / 100	500 ms	512 KB

retro

#include <bits/stdc++.h>

using namespace std;

#define MAX 310

string seq, ans;
int r, s, x, y;
char v[MAX][MAX];

bool valid(int i, int j){
    if(i >= 0 && i <= r && j >= 1 && j <= s)return true;
    return false;
}

void dfs(int i, int j){

    if(v[i][j] == '*' || (i < 1 && j >= 1 && j <= s)){

        stack<char> pilha;

        bool ok = true;
        for(int i = 0; i < seq.size(); i++){
            if(seq[i] == '('){
                pilha.push('(');
            }else if(seq[i] == ')'){
                if(pilha.size() > 0){
                    pilha.pop();
                }else{
                    ok = false;
                    break;
                }
            }
        }

        if(pilha.size() > 0) ok = false;

        if(ok && seq.size() > ans.size()){
            ans = seq;
        }else if(ok && seq.size() == ans.size()){
            for(int i = 0; i < seq.size(); i++){
                if(ans[i] == ')' && seq[i] == '('){
                    ans = seq;
                    break;
                }
            }
        }
        return;
    }

    seq += v[i][j];

    if(valid(i-1, j-1)){
        int tmp = seq.size();
        dfs(i-1, j-1);
        if(seq.size() > tmp)
            seq.erase(seq.begin()+seq.size()-1);
    }
    if(valid(i-1, j)){
        int tmp = seq.size();
        dfs(i-1, j);
        if(seq.size() > tmp)
            seq.erase(seq.begin()+seq.size()-1);
    }
    if(valid(i-1, j+1)){
        int tmp = seq.size();
        dfs(i-1, j+1);
        if(seq.size() > tmp)
            seq.erase(seq.begin()+seq.size()-1);
    }

    return;

}

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

    cin >> r >> s;
    for(int i = 1; i <= r; i++){
        for(int j = 1; j <= s; j++){
            cin >> v[i][j];
            if(v[i][j] == 'M'){
                x = i; y = j;
            }
        }
    }
    dfs(x, y);
    string ans2 = "";
    for(int i = 0; i < ans.size(); i++){
        if(ans[i] == '(' || ans[i] == ')'){
            ans2 += ans[i];
        }
    }
    cout << ans2.size() << "\n";
    cout << ans2 << "\n";
    /*
    for(int i = 0; i < ans2.size(); i++){
        cout << ans2[i] << " ";
    }
    cout << "\n";
    */
    return 0;
}

Compilation message

retro.cpp: In function 'void dfs(int, int)':
retro.cpp:23:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int i = 0; i < seq.size(); i++){
                        ~~^~~~~~~~~~~~
retro.cpp:41:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for(int i = 0; i < seq.size(); i++){
                            ~~^~~~~~~~~~~~
retro.cpp:56:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if(seq.size() > tmp)
            ~~~~~~~~~~~^~~~~
retro.cpp:62:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if(seq.size() > tmp)
            ~~~~~~~~~~~^~~~~
retro.cpp:68:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if(seq.size() > tmp)
            ~~~~~~~~~~~^~~~~
retro.cpp: In function 'int main()':
retro.cpp:91:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 0; i < ans.size(); i++){
                    ~~^~~~~~~~~~~~

Subtask #1

5.0 / 100.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	384 KB	Output is correct
2	Incorrect	47 ms	256 KB	Output isn't correct
3	Incorrect	336 ms	384 KB	Output isn't correct
4	Incorrect	426 ms	504 KB	Integer 0 violates the range [1, 100000]
5	Incorrect	338 ms	504 KB	Output isn't correct
6	Execution timed out	1071 ms	384 KB	Time limit exceeded
7	Execution timed out	1085 ms	384 KB	Time limit exceeded
8	Execution timed out	1084 ms	384 KB	Time limit exceeded
9	Execution timed out	1077 ms	384 KB	Time limit exceeded
10	Execution timed out	1073 ms	384 KB	Time limit exceeded
11	Execution timed out	1073 ms	512 KB	Time limit exceeded
12	Execution timed out	1074 ms	512 KB	Time limit exceeded
13	Execution timed out	1085 ms	512 KB	Time limit exceeded
14	Execution timed out	1072 ms	512 KB	Time limit exceeded
15	Execution timed out	1065 ms	512 KB	Time limit exceeded
16	Execution timed out	1077 ms	512 KB	Time limit exceeded
17	Execution timed out	1068 ms	512 KB	Time limit exceeded
18	Execution timed out	1087 ms	512 KB	Time limit exceeded
19	Execution timed out	1076 ms	512 KB	Time limit exceeded
20	Execution timed out	1076 ms	512 KB	Time limit exceeded