func_code_string: #include <bits/stdc++.h>   using namespace std;   int CONST =  z  -  a  + 1;   struct Node {     Node() {       chars.resize(CONST);       for (int i = 0; i < CONST; i++) chars[i].reset(nullptr);     }     vector<unique_ptr<Node> > chars;   };   int prefix(Node* node, const string& word, int index) {     while (true) {       if (index == word.size()) return word.size();       char c = word[index];       if (node->chars[c -  a ].get() == nullptr) return index + 1;       node = node->chars[c -  a ].get();       ++index;     }   }   void add(Node* node, const string& word, int index) {     while (true) {       if (index == word.size()) return;       char c = word[index];       if (node->chars[c -  a ].get() == nullptr)         node->chars[c -  a ].reset(new Node());       node = node->chars[c -  a ].get();       index++;     }   }   int main() {     int k;     cin >> k;     string T;     cin >> T;     for (int i = 0; i < T.size(); ++i) {       for (int j = 1; j < T.size(); j++) {         for (int l = i; l <= i + j * 4; l += j) {           if (l < T.size() && T[l] ==  * ) {             if (l == i + j * 4) {               cout <<  yes  << endl;               return 0;             }           } else {             break;           }         }       }     }     cout <<  no  << endl;     return 0;   }   