import sys
S, T, c = sys.stdin.readline().rstrip().split()
S = int(S)
T = int(T)

if c == '<' and S < T:
    print("YES")
elif c == '<' and S >= T:
    print("NO")
elif c == '>' and S > T:
    print("YES")
elif c == '>' and S <= T:
    print("NO")
elif c == '=' and S == T:
    print("YES")
else:
    print("NO")