'''

class Solution(object):

solution 1

l = len(s)

if l < 2:

return s

return self.reverseString(s[l/2:]) + self.reverseString(s[:l/2])

solution 2

# r = list(s)

# i, j = 0, len(r) - 1

# while i < j:

# r[i], r[j] = r[j], r[i]

# i += 1

# j -= 1

# return "".join(r)

solution 3

# return s[::-1]

solution 4

# return "".join(reversed(list(s)))

'''