import sys; input = sys.stdin.buffer.readline
sys.setrecursionlimit(10**7)
from collections import defaultdict
con = 10 ** 9 + 7; INF = float("inf")

def getlist():
	return list(map(int, input().split()))

#処理内容
def main():
	A, B = getlist()
	if A + 1 <= B:
		print("YES")
		print(B - A - 1)
	else:
		print("NO")
		print(A + 1 - B)
	




if __name__ == '__main__':
	main()