TurnOff1stSetBit.cpp

/*
You are given an integer Ni. You need to make first set bit of binary representation of N to 0 and return the updated N.
Counting of bits start from 0 from right to left.
Input Format :

Integer N 

Output Format :

Updated N

Sample Input 1 :

4

Sample Output 1 :

0

Sample Input 2 :

12 

Sample Output 2 :

8

 */

int turnOffFirstSetBit(int n){
    /* Don't write main().
     * Don't read input, it is passed as function argument.
     * Return output and don't print it.
     * Taking input and printing output is handled automatically.
     */
    int ans = n & (n-1);
    return ans;
    
}


#include <iostream>
using namespace std;

int main() {
	int n;

	cin >> n;
	
	cout<< turnOffFirstSetBit(n) <<endl;
		
	return 0;
}