// yukicoder: No.642 Two Operations No.1
// 2019.4.14 bal4u

#include <stdio.h>

int main()
{
	int x, N, ans;
	
	scanf("%d", &N);
	ans = 0, x = 1;
	while (x < N) x <<= 1, ans++;
	ans += x - N;
	printf("%d\n", ans);
	return 0;
}