import sys

sys.setrecursionlimit(10**7)
def I(): return int(sys.stdin.readline().rstrip())
def MI(): return map(int,sys.stdin.readline().rstrip().split())
def LI(): return list(map(int,sys.stdin.readline().rstrip().split()))
def LI2(): return list(map(int,sys.stdin.readline().rstrip()))
def S(): return sys.stdin.readline().rstrip()
def LS(): return list(sys.stdin.readline().rstrip().split())
def LS2(): return list(sys.stdin.readline().rstrip())


S,T,c = S().split()
S = int(S)
T = int(T)

if c == '=':
    a = (S == T)
elif c == '<':
    a = (S < T)
else:
    a = (S > T)

ans = ['NO','YES'][a]
print(ans)