Submission #47806

#	Time	Username	Problem	Language	Result	Execution time	Memory
47806		mirbek01	Security Gate (JOI18_security_gate)	C++17	0 / 100	2 ms	376 KiB

securitygate

# include <bits/stdc++.h>

using namespace std;

int n, ans;
string s;
vector <int> v;

int main(){
      cin >> n >> s;

      for(int i = 0; i < n; i ++)
            if(s[i] == 'x')
                  v.push_back(i);

      int sz = v.size();

      for(int mask = 0; mask < (1 << sz); mask ++){
            for(int i = 0; i < sz; i ++){
                  int bit = (1 << i) & mask;
                  if(bit)
                        s[v[i]] = ')';
                  else
                        s[v[i]] = '(';
            }

            bool f = 0;

            for(int i = 0; i < n && !f; i ++){
                  for(int j = i; j < n && !f; j ++){
                        int sum = 0;
                        bool ff = 1;
                        for(int k = 0; k < n && ff; k ++){
                              if(k >= i && k <= j) {
                                    if(s[k] == '(') s[k] = ')';
                                    else s[k] = '(';
                              }
                              if(s[k] == '(')
                                    sum ++;
                              else
                                    sum --;
                              if(k >= i && k <= j){
                                    if(s[k] == '(') s[k] = ')';
                                    else s[k] = '(';
                              }
                              if(sum < 0) ff = 0;
                        }
                        if(sum != 0) ff = 0;
                        f |= ff;
                  }
            }
            ans += f;
      }

      cout << ans << endl;
}

• Subtask 1: 0 / 4
• Subtask 2: 0 / 8
• Subtask 3: 0 / 18
• Subtask 4: 0 / 43
• Subtask 5: 0 / 27