#include <bits/stdc++.h>

using namespace std;

#define FOR(i, a, b) for(int i = (a); i < (b); i++)
#define RFOR(i, a, b) for(int i = (a) - 1; i >= (b); i--)
#define SZ(a) int(a.size())
#define ALL(a) a.begin(), a.end()
#define PB push_back
#define MP make_pair
#define F first
#define S second

typedef long long LL;
typedef vector<int> VI;
typedef vector<LL> VL;
typedef pair<int, int> PII;
typedef pair<LL, LL> PLL;
typedef double db;

int main()
{
	ios::sync_with_stdio(0);
	cin.tie(0);
	
	int a, b;
	cin >> a >> b;
	int cnt = 0;
	while (a != b)
	{
		if (a < b)
		{
			cnt += b - a;
			break;
		}
		if (a % 2 == 0)
		{
			a /= 2;
			cnt++;
		}
		else
		{
			a++;
			cnt++;
		}
	}
	cout << cnt << '\n';
	
	return 0;
}