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 == 0:
    print('NO')
    
if F == 1:
    print('YES')