x = input()
x = x.split()
DANSI = int(x[0])
ZYOSI = int(x[1])
if DANSI >= ZYOSI:
    amari = DANSI - ZYOSI + 1
    if amari == 0:
        kekka = "YES"
    else:
        kekka = "NO"
else:
    amari = ZYOSI - DANSI - 1
    kekka = "YES"
print(kekka)
print(amari)