n, k= [ int(v) for v in input().split() ]
print("YES" if k <= (n+1)//2 else "NO") int(v) for v in input().split() for v in input().split() v input().split() ().split () input split for v in input().split() int(v) int v n, k= [ int(v) for v in input().split() ] n [ int(v) for v in input().split() ] k print("YES" if k <= (n+1)//2 else "NO") print "YES" if k <= (n+1)//2 else "NO" k <= (n+1)//2 k (n+1)//2 n+1 n 1 2 "YES" "NO" k= [ int(v) for v in input().split() ] [ int(v) for v in input().split() ] k n, k= [ int(v) for v in input().split() ] [ int(v) for v in input().split() ] n
n, k= [ int(v) for v in input().split() ]
print("YES" if k <= (n+1)//2 else "NO")