#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#define rep(i,j,k) for(int i = (j); i <= (k); i++)

int main()
{
	int n, m;
	scanf("%d%d", &n, &m);
	int* a = (int*)malloc(n * sizeof(int));
	memset(a, 0, n * sizeof(int));
	rep(i, 0, n - 1)
		scanf("%d", &a[i]);
	for (int i = 0; i < n; i++)
		for (int j = 0; j < n - i - 1; j++)
			if (a[j] > a[j + 1])
			{
				int temp = a[j];
				a[j] = a[j + 1];
				a[j + 1] = temp;
			}
	//rep(i, 0, n - 1)
	//	printf(" %d", a[i]);
	int occupy = 0;
	int ambition = 0;
	int flag = 0;
	rep(i, 1, n)
	{
		ambition += a[i - 1] * (n - occupy);
		if (ambition > m)
		{
			flag = 1;
			break;
		}
	}
	if (flag)
		printf("yes");
	else
		printf("no");
	return 0;
}