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