func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     unsigned long long n, k;     cin >> n >> k;     unsigned long long r = 1, l = 0, num = n, mid;     for (int i = 0; i < n; i++) {       r <<= 1;     }     mid = (l + r) >> 1;     while (mid != k) {       --num;       if (mid > k)         r = mid;       else         l = mid;       mid = (l + r) >> 1;     }     cout << num;     return 0;   }   