#include <stdio.h>
#include <stdlib.h>
#include <math.h>

int bit(int a);

int main(void) {
    int N;
    int s = 1;
    int c = 1;
    int b;
    int ng = 0;
    int n0g[10] = {0};
    scanf("%d", &N);
    n0g[0] = 1;
    if (N == 1) {
        printf("%d\n", s);
        return EXIT_SUCCESS;
    }
    for (;;) {
        b = bit(c);
        s++;
        if (!(s % 10)) {
            ng = c;
        }
        if (c+b == N) {
            printf("%d\n", s);
            break;
        } else if (c+b > N) {
            c -= b;
        } else {
            c += b;
        }
        if (c == ng) {
            printf("%d\n", -1);
            return EXIT_SUCCESS;
        }
    }
    return EXIT_SUCCESS;
}

int bit(int a) {
    int t = 0;
    int p;
    for (int i = 15; i >= 0; i--) {
        p = pow(2, i);
        if (a >= p) {
            t++;
            a -= p;
        }
    }
    return t;
}