#include <bits/stdc++.h>
#include <cstdint>
using namespace std;

// SET TO FALSE BEFORE SUBMITTING
#define DEBUG false
#define print(x)                                                            \
    do {                                                                    \
        if (DEBUG) {                                                        \
            cout << "Line " << __LINE__ << ": " #x << " = " << x << endl;   \
        }                                                                   \
    } while (false)

#define rep(i, a, b)   for (int i = a; i < (b); ++i)
#define all(x)         (x).begin(), (x).end()
#define sz(x)          (int)(x).size()
#define ia(n)          std::array<int, n>
#define lla(n)         std::array<ll, n>

using s8 =             int8_t;
using s16 =            int16_t;
using s32 =            int32_t;
using s64 =            int64_t;

using u8 =             uint8_t;
using u16 =            uint16_t;
using u32 =            uint32_t;
using u64 =            uint64_t;

using vi =             std::vector<int>;
using pii =            std::pair<int, int>;
using ll =             long long;
using vll =            std::vector<ll>;
using pll =            std::pair<ll, ll>;

u64 get_ops(u64 a, u64 b) {
    u64 n = 0;

    while (true) {
        if (a == b)     return n;
        if (a < b)      return n + b - a;
        if (a & 1)      ++a;
        else            a >>= 1;
        ++n;
    }
}

s32 main() {
    // DISABLE IF INTERACTIVE
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    u64 a, b;
    cin >> a >> b;
    cout << get_ops(a, b) << '\n';

    return 0;
}