n,k = map(int,input().split())
a = list(map(int,input().split()))
m=max(a)
g = [0]* (m + 1)

for i in range(1,m+1):
    if g[i-1] == k:
        g[i] = 0
    else:
        g[i] = g[i-1] + 1

cnt = 0
for i in a:
    cnt^=g[i]

print('NO' if cnt == 0 else 'YES')