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

S = int(S); T = int(T)

F = 0

if (c == "<") and (S < T):
    F = 1
    
if (c == ">") and (S > T):
    F = 1
    
if (c == "=") and (S == T):
    F = 1
    
if F == 1:
    print("YES")
    
else:
    print("NO")