import sequtils, strscans

const
  m = [
    (1, 2),
    (1, -2),
    (2, 1),
    (2, -1),
    (-1, 2),
    (-1, -2),
    (-2, 1),
    (-2, -1),
  ]

var
  b = false.repeat(13).repeat(13)
  list = [@[(6, 6)], @[], @[], @[]]

b[6][6] = true

for i in 0 ..< 3:
  for (lx, ly) in list[i]:
    for (mx, my) in m:
      if b[lx + mx][ly + my]:
        continue
      else:
        b[lx + mx][ly + my] = true
        list[i.succ].add (lx + mx, ly + my)


let
  (_, x, y) = stdin.readLine.scanTuple "$i $i"

if x.abs > 6 or y.abs > 6:
  echo "NO"
  quit()

echo:
  if b[x.succ 6][y.succ 6]: "YES"
  else: "NO"