impares_e_finais.cpp

#include <bits/stdc++.h>

using namespace std;

const int maxn = 110;

int v[maxn];

int main()
{
	int n;
	cin >> n;

	for (int i = 0; i < n; i++) cin >> v[i];

	if (n%2==1 and v[0]%2==1 and v[n-1]%2==1) cout << "Yes\n";
	else cout << "No\n";

	return 0;
}