func_code_string: #include <bits/stdc++.h>   using namespace std;   using ll = long long;   int main() {     ios::sync_with_stdio(false);     cin.tie(nullptr);     ll n, k;     cin >> n >> k;     if (k == 1 || k == n) {       cout << (3 * n);     } else {       cout << min(2 + 3 * (k - 1) + k + 3 + 3 * (n - k - 1),                   6 + 3 * (n - k - 1) + n - k + 3 * (k - 1));     }     return 0;   }   