CDRSANJ.cpp

// CODER FIRST PROBLEM


	#include <bits/stdc++.h>
	#include <cstdio>
	#include <cstring>
	#include <cmath>
	#include <cstring>
	#include <chrono>
	#include <complex>
	#define ll long long
	#define ld long double
	#define vi vector<int>
	#define vll vector<ll>
	#define vvi vector < vi >
	#define pii pair<int,int>
	#define pll pair<long long, long long>
	#define mod 1000000007
	#define inf 1000000000000000001;
	#define all(c) c.begin(),c.end()
	#define mp(x,y) make_pair(x,y)
	#define mem(a,val) memset(a,val,sizeof(a))
	#define eb emplace_back
	#define pb push_back
	#define f first
	#define s second
	
	using namespace std;
	int main()
	{
		std::ios::sync_with_stdio(false);
		int T;
		T=1;
		// cin.ignore(); must be there when using getline(cin, s)
		while(T--)
		{
			int x;
			cin>>x;
			if(x==1)
			{
				cout<<1<<endl;
			}
			else if(x%2)
			{
				cout<<0<<endl;
			}
			else
			{
				int ct=0;
				while(x%2==0)
				{
					++ct;
					x=x/2;
				}
				if(x!=1)
					cout<<ct*2<<endl;
				else
					cout<<ct<<endl;
			}
			
		}
		return 0;
	}