#include<bits/stdc++.h>
using namespace std;
#define int long long
int x, y;
map<int, int>p;
int bfs(int y) {
	if (x > y)return x - y;
	if (p[y] > 0) return p[y];
	if (x == y)return 0;
	p[y] = y - x;
	if (y % 2 == 0)
		p[y] = min(p[y], bfs(y / 2) + 1);
	else {
		p[y] = min(p[y], bfs((y + 1) / 2) + 2);
		p[y] = min(p[y], bfs((y - 1) / 2) + 2);
	}
	return p[y];
}
signed main() {

	cin >> x >> y;
	cout << bfs(y);


}