#include <cstdio>
#include <algorithm>
using namespace std;

int n, mx, sum;

int main()
{
	for (int i = 1, x; i <= n; i ++)
	{
		scanf("%d", &x);
		mx = max(mx, x);
		sum += x;
	}
	puts(mx * 2 < sum ? "Yes" : "No");
	return 0;
}