#include <stdio.h>
#include <vector>
#include <queue>

#define UKN -1

using namespace std;

int main()
{
    int n;
    scanf("%d", &n);

    vector<int> squares(n, 0);
    for (int i = 0; i < n; i++)
    {
        unsigned int v = i + 1;
        unsigned int c;

        for (c = 0; v; v >>= 1)
        {
            c += v & 1;
        }

        squares[i] = c;
    }

    vector<int> least_steps(n, UKN);
    least_steps[0] = 1;

    queue<int> reachable_sqs;
    reachable_sqs.push(0);

    int goal_idx = n - 1;

    while (!reachable_sqs.empty())
    {
        int cur_idx = reachable_sqs.front();
        reachable_sqs.pop();

        int propulsion = squares[cur_idx];

        if (cur_idx + propulsion <= goal_idx && least_steps[cur_idx + propulsion] == UKN)
        {
            least_steps[cur_idx + propulsion] = least_steps[cur_idx] + 1;
            reachable_sqs.push(cur_idx + propulsion);
        }

        if (cur_idx - propulsion >= 0 && least_steps[cur_idx - propulsion] == UKN)
        {
            least_steps[cur_idx - propulsion] = least_steps[cur_idx] + 1;
            reachable_sqs.push(cur_idx - propulsion);
        }
    }

    printf("%d", least_steps[goal_idx]);
}