func_code_string: #include <bits/stdc++.h>   using namespace std;   void solve() {     long long n;     cin >> n;     string s;     cin >> s;     long long mini = n - 1, maxi = -1;     for (long long i = 0; i < n; i++) {       if (s[i] ==  1 ) {         mini = i;         break;       }     }     for (long long i = n - 1; i >= 0; i--) {       if (s[i] ==  1 ) {         maxi = i;         break;       }     }     if (maxi == -1) {       cout << n << endl;       return;     }     cout << 2 * max(maxi + 1, n - mini) << endl;   }   int main() {     long long t;     cin >> t;     while (t--) solve();   }   