func main()
	var x: int :: cui@inputInt()
	var y: int :: cui@inputInt()
	
	var dx: []int :: [2, 2, 1, 1, -1, -1, -2, -2]
	var dy: []int :: [1, -1, 2, -2, 2, -2, 1, -1]
	var qu: queue<C> :: #queue<C>
	do qu.add((#C).init(0, 0, 0))
	
	var ans: bool :: false
	while loop(^qu <> 0)
		var c: C :: qu.get()
		if(c.cnt = 3)
			skip loop
		end if
		for i(0, 7)
			var px: int :: c.px + dx[i]
			var py: int :: c.py + dy[i]
			if(px = x & py = y)
				do ans :: true
				break loop
			end if
			do qu.add((#C).init(px, py, c.cnt + 1))
		end for
	end while
	do cui@print(ans ?("YES\n", "NO\n"))
	
	class C()
		+var px: int
		+var py: int
		+var cnt: int
		+func init(px: int, py: int, cnt: int): C
			do me.px :: px
			do me.py :: py
			do me.cnt :: cnt
			ret me
		end func
	end class
end func