import sys
input = sys.stdin.readline

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

if c=="<":
    if S<T:
        print("YES")
    else:
        print("NO")

elif c==">":
    if S>T:
        print("YES")
    else:
        print("NO")

else:
    if S==T:
        print("YES")
    else:
        print("NO")