func_code_string: #include <bits/stdc++.h>   using namespace std;   const int add = 1e9;   const int INF = 2e9;   const long long mod = 1e9 + 7;   const long long mod1 = 3e9 + 19;   const long long mod2 = 3e9 - 71;   const long long longINF = 3e18;   const long long ph = 31;   const long double pi = acos(-1);   const long double eps = 1e-8;   const int M = 1 << 18;   int n, a[105], res;   int main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     cin >> n;     if (!(n & 1)) {       cout <<  No ;       return 0;     }     for (int i = 0; i < n; i++) cin >> a[i];     if (a[0] % 2 == 0 || a[n - 1] % 2 == 0) {       cout <<  No ;       return 0;     }     cout <<  Yes ;     return 0;   }   