import numpy as np

def get_data():
    A, B = input().split(' ')
    return int(A),int(B)

def main():
    A, B = get_data()

    if A + 1 <= B:
        print("YES")
        print(B - ( A + 1))
    else:
        print("NO")
        print((A + 1) - B)

if __name__=='__main__':
    main()