l=input().split()
l=[int(l[i])for i in range(2)]+[l[2]]
if l[2]=='<':
    a=l[0]<l[1]
elif l[2]=='>':
    a=l[0]>l[1]
else:
    a=l[0]==l[1]
print('YNEOS'[not(a)::2])