func_code_string: #include <bits/stdc++.h>   using namespace std;   long long n, m;   void in() { cin >> n >> m; }   void out() {     int s = 0;     if (n > m) {       cout << n - m;       return;     }     while (n < m) {       s++;       n <<= 1;     }     int diff = n - m;     n >>= 1;     long long x = 2;     long long c = 0;     while (x <= diff && c < s) {       c++;       x *= 2;     }     x /= 2;     while (diff > 0) {       diff -= x;       s++;       while (diff < x) {         x /= 2;       }     }     cout << s;   }   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     long long t = 1;     while (t--) {       in();       out();     }     return 0;   }   