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+# 476. Number Complement
+
+"""
+the complement of an integer is the integer you get when you flip all the 0's
+to 1's and all the 1's to 0's in its binary representation. for example, the
+integer 5 is "101" in binary and its complement is "010", which is the
+integer 2. given an integer 'num', return its complement
+"""
+
+
+class Solution(object):
+ def findComplement(self, num):
+ """
+ :type num: int
+ :rtype: int
+ """
+ i = 1
+ while i <= num:
+ i = i << 1
+ return (i - 1) ^ num
+
+
+if __name__ == "__main__":
+ obj = Solution()
+ print(obj.findComplement(5))
+ print(obj.findComplement(1))