#include <iostream>
#include <cstring>
#include <algorithm>

int n;
int dp[10001];

const int inf = 100000000;

int countBit(int x){
	int ret = 0;
	while (x > 0){
		if (x & 1)ret++;
		x >>= 1;
	}
	return ret;
}

int main(){
	std::cerr << "Hello" << std::endl;
	std::cin >> n;

	for (int i = 0; i < 10001; i++)dp[i] = inf;
	dp[1] = 1;

	for (int i = 0; i < 10001; i++){
		for (int j = 1; j <= n; j++){
			if (dp[j] == inf)continue;

			int cnt = countBit(j);
			if (j + cnt <= n)dp[j + cnt] = std::min(dp[j + cnt], dp[j] + 1);
			if (j - cnt >= 1)dp[j - cnt] = std::min(dp[j - cnt], dp[j] + 1);
		}
	}

	std::cout << (dp[n] == inf ? -1 : dp[n]) << std::endl;

	return 0;
}