Complement of Base 10 Integer Leetcode Solution

 

Problem Statement

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 n, return its complement.

 

Example 1:

Input: n = 5
Output: 2
Explanation: 5 is "101" in binary, with complement "010" in binary, which is 2 in base-10.

Example 2:

Input: n = 7
Output: 0
Explanation: 7 is "111" in binary, with complement "000" in binary, which is 0 in base-10.

Example 3:

Input: n = 10
Output: 5
Explanation: 10 is "1010" in binary, with complement "0101" in binary, which is 5 in base-10.

 

Constraints:

• 0 <= n < 109

Solution Program

[C++]

class Solution {

public:

    int bitwiseComplement(int n) {

       

      int m=n;

        int mask=0;

         if(n==0){

            return 1;

         }

        while(m!=0){

            mask=(mask<<1) | 1;

           m = m>>1;

        }

        int ans= (~n)&mask;

        return ans;

       

       

    }

};

if ( This Post was Helpful )

{   

      <<"Do Share it with Your Friends and Classmates">>

}

return Comments and Likes;