Replace the Bit

PROBLEM :

Given two numbers n and k, change the kth bit of the number n to '0' if it is  '1', else return the number n itself.

Input:
First line of the input contains an intger T denoting the number of test case. Each test contains a single line containg two space seperated integers n and k respectively.

Output:
For each test case output a single integer.
Constraints:

1<=T<=100
1<=N<=106
Example:

Input:
2
13 3
13 2

Ouput:
13
9

Explanation:

Test Case 1: n = 13 ('1101') k=3
return 13

Test Case 2: n = 13('1101') k=2
return 9('1001')
   
--------------------------------------------------------------------------------
SIMPLE c++ IMPLEMENTATION :
--------------------------------------------------------------------------------

#include<iostream>
using namespace std;
int main()
{
int t ;
cin>>t ;
while(t--){
   int no,k ;
   cin>>no>>k ;
 
   int temp,count ;
   count=0 ;
   temp=no ;
   while(temp){
       temp=temp/2 ;
       count++ ;
   }
 
   int p=count-k ;
   cout<<(no&~(1<<p))<<endl ;
}
return 0;
}

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