#include <cmath>
#include <iostream>

long long calc_min_ops(long long a, long long b) {
    if (a > b) { return a - b; }
    long long div = b / a;
    auto multiply_times = static_cast<long long>(std::log2(div));
    a = a * std::pow(2, multiply_times);
    return std::min(multiply_times + b - a, multiply_times + 1 + (2 * a - b));
}

int main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
    long long a, b;
    std::cin >> a >> b;
    std::cout << calc_min_ops(a, b) << std::endl;

    return 0;
}