#include <iostream>
using namespace std;
int main()
{
	int n,array[20],i;
	while(scanf("%d",&n) != EOF){
		int total = 0;
		for(i = 0;i < n;i++)
		{
			cin >> array[i];
			total += array[i];
		}
		if(total % 2 != 0)
		{
			cout << "Yes\n";
		}
		else
		{ 
			if(n % 2 == 0)
				cout << "No\n";
			else
				cout << "Yes\n";
		}
	}
	return 0;
}