#include <stdio.h>

int main(void)
{
	int n, i = 0, biscuit = 1;
	scanf("%d", &n);

	while (n >= biscuit*2) {
		biscuit = biscuit * 2;
		i++;
	}

	if (n == biscuit) {
		printf("%d\n", i);
		return 0;
	} else if (n == biscuit+1) {
		printf("%d\n", i+1);
		return 0;
	}

	if ((n - biscuit)%2 == 0) {
		i += 1;
	} else { i += 2;
	}

	printf("%d\n", i);
	return 0;
}