class Solution:
# @param n, an integer
# @return an integer
def reverseBits(self, n):
if not n:return 0
res=0
for i in range(32):
res<<=1
res+=n&1
n>>=1
return res
class Solution:
# @param n, an integer
# @return an integer
def reverseBits(self, n):
return int('{:032b}'.format(n)[::-1],2)
