#include <iostream>

#define min(a, b) ((a) < (b) ? (a) : (b))

using namespace std;

int bitCount(int v)
{
	int cnt = 0;
	do {
		cnt += v % 2;
		v /= 2;
	} while (v > 0);
	return cnt;
}

int main(int argc, char* argv[])
{
	int N;
	cin >> N;

	int ns[N + 1];
	for (int i = 1; i <= N; i++) {
		ns[i] = bitCount(i);
		//		cout << i << ":" << ns[i] << endl;
	}

	int dp[N + 1];
	const int defaultValue = 10000 + 1;
	for (int i = 1; i <= N; i++) {
		dp[i] = defaultValue;
	}
	dp[1] = 1;
	for (int i = 1; i <= N; i++) {
		int v = ns[i];
		if (i - v > 0) {
			if (dp[i - v] > dp[i] + 1) {
				dp[i - v] = dp[i] + 1;
				i--;
				i = i - v;
				continue;
			}
			//			dp[i - v] = min(dp[i - v], dp[i] + 1);
		}
		if (i + v <= N) {
			dp[i + v] = min(dp[i + v], dp[i] + 1);
		}
	}
	if (dp[N] == defaultValue) {
		cout << "-1" << endl;
		return 0;
	}
	cout << dp[N] << endl;
	return 0;
}