func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n;     cin >> n;     string str;     cin >> str;     for (int i = 0;; i += 2) {       if (i >= str.length() - 1) break;       if (str[i] == str[i + 1]) {         str.erase(str.begin() + i);         i -= 2;       }     }     if (str.length() % 2) str.erase(str.end() - 1);     cout << n - str.length() << endl;     cout << str << endl;   }   