import strutils

let
    v = stdin.readLine.split
    (s, t, c) = (v[0].parseInt, v[1].parseInt, v[2])

func toYesNo(b: bool): string =
    if b: "YES" else: "NO"

echo case c:
    of "<": toYesNo(s < t)
    of ">": toYesNo(s > t)
    else: toYesNo(s == t)