#include <stdio.h>

int main()
{
	int i, N, X, C[101];
	scanf("%d %d", &N, &X);
	for (i = 1; i <= N; i++) scanf("%d", &(C[i]));
	if (X >= C[1] && X <= C[N]) printf("Yes\n");
	else printf("No\n");
	fflush(stdout);
	return 0;
}