a,b = map(int, input().split())
if a>0 and b>=0:
    print('{}{}'.format(str(a), str(b)))
elif a==0  and b>=0:
    print(b)
elif a>0 and b<0:
    print(a+b)
elif a==0 and b<0:
    print(b)
elif a<0 and b>0:
    print('{}{}'.format(str(a), str(b)))
elif a<0 and b==0:
    print(a)
else:
    print(a+b)