func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n;     cin >> n;     vector<int> num(n + 1);     for (int i = 1; i <= n; i++) cin >> num[i];     if (num[1] % 2 == 0 || n % 2 == 0 || num[n] % 2 == 0) {       cout <<  No ;       return 0;     }     cout <<  Yes ;     return 0;   }   