#include <bits/stdc++.h>
using namespace std;
int getIthBit(int n,int i){
	int mask=(1<<i);
	return (n & mask) > 0 ? 1 : 0 ;
}
void setIthBit(int &n,int i){
	int mask=(1<<i);
	n=n|mask;
}
void clearIthBit(int &n,int i){
	int mask=~(1<<i);
	n=n & mask;
}
void updateIthBit(int &n,int i,int v){
	int mask=(1<<i),m1=~(1<<i);
	(v==0) ? n=n&m1 : n=n|mask ;
}
int clearIBits(int n,int i){
	int mask=(-1<<i);
	n=n&mask;
	return n;
}
int main() {
	int n=15,i=2;
	// cout<<getIthBit(n,i)<<endl;
	// setIthBit(n,i);
	// clearIthBit(n,i);
	// updateIthBit(n,i,0);
	cout<<clearIBits(n,i)<<endl;
	return 0;
}

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