#include <stdio.h>

int main(void)
{
	int n, i, j = 1, k, current = 1, c2, log[10]={0,0,0,0,0,0,0,0,0,0};
	scanf("%d", &n);

	while (current < n) {
		c2 = current; i = 0;
		while(c2) {
			c2 &= (c2 - 1);
			i++;
		}
		printf("current=%d i=%d\n", current, i);

		if (current+i <= n) {
			current += i;
		} else if (current+i > n) {
			current -= i;
		}
		j++;
		for (k = 0; k < 10; k++) {
			if (log[k] == current) {
				printf("-1\n");
				return 0;
			}
		}
		log[j%10] = current;	
	}

	if (current == n) {
		printf("%d\n", j);
	} else {
		printf("-1\n");
	}

	return 0;
}