func_code_string: #include <bits/stdc++.h>   using namespace std;   const int inf = 0x7f7f7f7f;   int main() {     string s;     cin >> s;     int ans = 0;     stack<char> S;     for (int i = 0; i < s.length(); i++) {       if (S.empty()) {         S.push(s[i]);       } else if (S.top() == s[i]) {         ans++;         S.pop();       } else {         S.push(s[i]);       }     }     if (ans % 2 == 0)       cout <<  No  << endl;     else       cout <<  Yes  << endl;     return 0;   }   