oj.uz

Submission #57717

# Submission time Handle Problem Language Result Execution time Memory
57717 2018-07-15T21:55:08 Z ksun48 Security Gate (JOI18_security_gate) C++14
12 / 100
 5000 ms 764 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long LL;

const LL MOD = 1000000007;
const int MAXN = 110;
LL check(string s){
	vector<int> psums(1,0);
	for(int j = 0; j < s.size(); j++){
		if(s[j] == '('){
			psums.push_back(psums[psums.size() - 1] + 1);
		} else {
			psums.push_back(psums[psums.size() - 1] - 1);			
		}
	}
	int laste = psums.size() - 1;
	while(laste > 0 && psums[laste-1] >= psums[psums.size()-1]){
		laste--;
	}
	vector<int> endlists[2 * MAXN];
	vector<int> psumlists[2 * MAXN];
	for(int j = laste; j <= psums.size() - 1; j++){
		endlists[MAXN + psums[j]].push_back(j);
	}
	for(int j = 0; j <= psums.size() - 1; j++){
		psumlists[MAXN + psums[j]].push_back(j);
	}
	int a = psums[psums.size() - 1] / 2;
	for(int j = 0; j < psums.size(); j++){
		if(psums[j] < 0) break;
		int need = psums[j] + a;
		vector<int>& z = endlists[MAXN + need];
		int idx = lower_bound(z.begin(), z.end(), j) - z.begin();
		if(idx >= z.size()) continue;
		int e = z[idx];
		// check if all elements in [j,e] are <=
		vector<int>& w = psumlists[MAXN + 2 * psums[j] + 1];
		int idx2 = lower_bound(w.begin(), w.end(), j) - w.begin();
		if(idx2 < w.size() && w[idx2] <= e){
			continue;
		}
		return 1;
	}
	return 0;
}

LL cnt(string s, int idx){
	if(idx == s.size()) return check(s);
	if(s[idx] != 'x'){
		return cnt(s, idx + 1);
	}
	string s1 = s;
	string s2 = s;
	s1[idx] = '(';
	s2[idx] = ')';
	return (cnt(s1, idx + 1) + cnt(s2, idx + 1)) % MOD;
}
int main(){
	int n;
	string s;
	cin >> n >> s;
	if(n % 2 == 1){
		cout << 0 << '\n';
		return 0;
	}
	cout << cnt(s, 0) << '\n';
}

Compilation message

securitygate.cpp: In function 'LL check(std::__cxx11::string)':
securitygate.cpp:9:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int j = 0; j < s.size(); j++){
                 ~~^~~~~~~~~~
securitygate.cpp:22:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int j = laste; j <= psums.size() - 1; j++){
                     ~~^~~~~~~~~~~~~~~~~~~
securitygate.cpp:25:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int j = 0; j <= psums.size() - 1; j++){
                 ~~^~~~~~~~~~~~~~~~~~~
securitygate.cpp:29:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int j = 0; j < psums.size(); j++){
                 ~~^~~~~~~~~~~~~~
securitygate.cpp:34:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(idx >= z.size()) continue;
      ~~~~^~~~~~~~~~~
securitygate.cpp:39:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(idx2 < w.size() && w[idx2] <= e){
      ~~~~~^~~~~~~~~~
securitygate.cpp: In function 'LL cnt(std::__cxx11::string, int)':
securitygate.cpp:48:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  if(idx == s.size()) return check(s);
     ~~~~^~~~~~~~~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 248 KB Output is correct
2 Correct 3 ms 356 KB Output is correct
3 Correct 2 ms 432 KB Output is correct
4 Correct 3 ms 468 KB Output is correct
5 Correct 3 ms 544 KB Output is correct
6 Correct 2 ms 544 KB Output is correct
7 Correct 4 ms 544 KB Output is correct
8 Correct 4 ms 672 KB Output is correct
9 Correct 2 ms 672 KB Output is correct
10 Correct 2 ms 672 KB Output is correct
11 Correct 3 ms 672 KB Output is correct
12 Correct 3 ms 672 KB Output is correct
13 Correct 3 ms 672 KB Output is correct
14 Correct 2 ms 732 KB Output is correct
15 Correct 2 ms 732 KB Output is correct
16 Correct 3 ms 732 KB Output is correct
17 Correct 3 ms 732 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 248 KB Output is correct
2 Correct 3 ms 356 KB Output is correct
3 Correct 2 ms 432 KB Output is correct
4 Correct 3 ms 468 KB Output is correct
5 Correct 3 ms 544 KB Output is correct
6 Correct 2 ms 544 KB Output is correct
7 Correct 4 ms 544 KB Output is correct
8 Correct 4 ms 672 KB Output is correct
9 Correct 2 ms 672 KB Output is correct
10 Correct 2 ms 672 KB Output is correct
11 Correct 3 ms 672 KB Output is correct
12 Correct 3 ms 672 KB Output is correct
13 Correct 3 ms 672 KB Output is correct
14 Correct 2 ms 732 KB Output is correct
15 Correct 2 ms 732 KB Output is correct
16 Correct 3 ms 732 KB Output is correct
17 Correct 3 ms 732 KB Output is correct
18 Correct 3 ms 732 KB Output is correct
19 Correct 5 ms 732 KB Output is correct
20 Correct 17 ms 732 KB Output is correct
21 Correct 41 ms 732 KB Output is correct
22 Correct 31 ms 732 KB Output is correct
23 Correct 6 ms 732 KB Output is correct
24 Correct 31 ms 732 KB Output is correct
25 Correct 3 ms 732 KB Output is correct
26 Correct 8 ms 732 KB Output is correct
27 Correct 44 ms 732 KB Output is correct
28 Correct 18 ms 732 KB Output is correct
29 Correct 8 ms 732 KB Output is correct
30 Correct 4 ms 732 KB Output is correct
31 Correct 39 ms 732 KB Output is correct

Subtask #3
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 248 KB Output is correct
2 Correct 3 ms 356 KB Output is correct
3 Correct 2 ms 432 KB Output is correct
4 Correct 3 ms 468 KB Output is correct
5 Correct 3 ms 544 KB Output is correct
6 Correct 2 ms 544 KB Output is correct
7 Correct 4 ms 544 KB Output is correct
8 Correct 4 ms 672 KB Output is correct
9 Correct 2 ms 672 KB Output is correct
10 Correct 2 ms 672 KB Output is correct
11 Correct 3 ms 672 KB Output is correct
12 Correct 3 ms 672 KB Output is correct
13 Correct 3 ms 672 KB Output is correct
14 Correct 2 ms 732 KB Output is correct
15 Correct 2 ms 732 KB Output is correct
16 Correct 3 ms 732 KB Output is correct
17 Correct 3 ms 732 KB Output is correct
18 Correct 3 ms 732 KB Output is correct
19 Correct 5 ms 732 KB Output is correct
20 Correct 17 ms 732 KB Output is correct
21 Correct 41 ms 732 KB Output is correct
22 Correct 31 ms 732 KB Output is correct
23 Correct 6 ms 732 KB Output is correct
24 Correct 31 ms 732 KB Output is correct
25 Correct 3 ms 732 KB Output is correct
26 Correct 8 ms 732 KB Output is correct
27 Correct 44 ms 732 KB Output is correct
28 Correct 18 ms 732 KB Output is correct
29 Correct 8 ms 732 KB Output is correct
30 Correct 4 ms 732 KB Output is correct
31 Correct 39 ms 732 KB Output is correct
32 Correct 222 ms 732 KB Output is correct
33 Correct 83 ms 732 KB Output is correct
34 Correct 4618 ms 732 KB Output is correct
35 Correct 251 ms 732 KB Output is correct
36 Correct 546 ms 732 KB Output is correct
37 Correct 2066 ms 764 KB Output is correct
38 Execution timed out 5003 ms 764 KB Time limit exceeded
39 Halted 0 ms 0 KB -

Subtask #4
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 248 KB Output is correct
2 Correct 3 ms 356 KB Output is correct
3 Correct 2 ms 432 KB Output is correct
4 Correct 3 ms 468 KB Output is correct
5 Correct 3 ms 544 KB Output is correct
6 Correct 2 ms 544 KB Output is correct
7 Correct 4 ms 544 KB Output is correct
8 Correct 4 ms 672 KB Output is correct
9 Correct 2 ms 672 KB Output is correct
10 Correct 2 ms 672 KB Output is correct
11 Correct 3 ms 672 KB Output is correct
12 Correct 3 ms 672 KB Output is correct
13 Correct 3 ms 672 KB Output is correct
14 Correct 2 ms 732 KB Output is correct
15 Correct 2 ms 732 KB Output is correct
16 Correct 3 ms 732 KB Output is correct
17 Correct 3 ms 732 KB Output is correct
18 Correct 3 ms 732 KB Output is correct
19 Correct 5 ms 732 KB Output is correct
20 Correct 17 ms 732 KB Output is correct
21 Correct 41 ms 732 KB Output is correct
22 Correct 31 ms 732 KB Output is correct
23 Correct 6 ms 732 KB Output is correct
24 Correct 31 ms 732 KB Output is correct
25 Correct 3 ms 732 KB Output is correct
26 Correct 8 ms 732 KB Output is correct
27 Correct 44 ms 732 KB Output is correct
28 Correct 18 ms 732 KB Output is correct
29 Correct 8 ms 732 KB Output is correct
30 Correct 4 ms 732 KB Output is correct
31 Correct 39 ms 732 KB Output is correct
32 Correct 222 ms 732 KB Output is correct
33 Correct 83 ms 732 KB Output is correct
34 Correct 4618 ms 732 KB Output is correct
35 Correct 251 ms 732 KB Output is correct
36 Correct 546 ms 732 KB Output is correct
37 Correct 2066 ms 764 KB Output is correct
38 Execution timed out 5003 ms 764 KB Time limit exceeded
39 Halted 0 ms 0 KB -

Subtask #5
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 248 KB Output is correct
2 Correct 3 ms 356 KB Output is correct
3 Correct 2 ms 432 KB Output is correct
4 Correct 3 ms 468 KB Output is correct
5 Correct 3 ms 544 KB Output is correct
6 Correct 2 ms 544 KB Output is correct
7 Correct 4 ms 544 KB Output is correct
8 Correct 4 ms 672 KB Output is correct
9 Correct 2 ms 672 KB Output is correct
10 Correct 2 ms 672 KB Output is correct
11 Correct 3 ms 672 KB Output is correct
12 Correct 3 ms 672 KB Output is correct
13 Correct 3 ms 672 KB Output is correct
14 Correct 2 ms 732 KB Output is correct
15 Correct 2 ms 732 KB Output is correct
16 Correct 3 ms 732 KB Output is correct
17 Correct 3 ms 732 KB Output is correct
18 Correct 3 ms 732 KB Output is correct
19 Correct 5 ms 732 KB Output is correct
20 Correct 17 ms 732 KB Output is correct
21 Correct 41 ms 732 KB Output is correct
22 Correct 31 ms 732 KB Output is correct
23 Correct 6 ms 732 KB Output is correct
24 Correct 31 ms 732 KB Output is correct
25 Correct 3 ms 732 KB Output is correct
26 Correct 8 ms 732 KB Output is correct
27 Correct 44 ms 732 KB Output is correct
28 Correct 18 ms 732 KB Output is correct
29 Correct 8 ms 732 KB Output is correct
30 Correct 4 ms 732 KB Output is correct
31 Correct 39 ms 732 KB Output is correct
32 Correct 222 ms 732 KB Output is correct
33 Correct 83 ms 732 KB Output is correct
34 Correct 4618 ms 732 KB Output is correct
35 Correct 251 ms 732 KB Output is correct
36 Correct 546 ms 732 KB Output is correct
37 Correct 2066 ms 764 KB Output is correct
38 Execution timed out 5003 ms 764 KB Time limit exceeded
39 Halted 0 ms 0 KB -