#include<iostream>
#include<cmath>
using namespace std;
int tataku(int n)
{
	long long temp1 = 1,temp2=n,temp3=0;
	while (temp2 > 0){
		temp1 *= 2;		//乗算
		temp2 -= temp1;	//食べた枚数を引く
		temp3++;		//回数
	}
	return temp3;
}
int main()
{
	long long eat, number, temp = 0, number2 = 0;
	cin >> eat;
	number = tataku(eat);
	while (1){
		if (number == 1) { 
			number2 += number; 
			break;
		}
		else if ((eat - (long long)pow(2.0, (double)number)) == 0)
		{
			number2 += number;
			break;
		}
		else if ((eat - (long long)pow(2.0, (double)number)) < 0)
		{
			number -= 1;
			number2 += number;
			if (number == 0)break;
			eat -= (int)pow(2.0, (double)number);
			number = tataku(eat);
		}
		else if ((eat - (long long)pow(2.0, (double)number)) > 0)
		{
			number2 += number;
			if (number == 0)break;
			eat -= (int)pow(2.0, (double)number);
			number = tataku(eat);
		};
	}
	cout << number2 << "\n";
}