func_code_string: #include <bits/stdc++.h>   using namespace std;   long long gcd(long long a, long long b) { return b == 0 ? a : gcd(b, a % b); }   const int MAXN = 1000;   int n;   char s[MAXN + 1];   int solve() {     int ret = n;     for (int i = (0); i < (n); ++i)       if (s[i] ==  1  || s[n - i - 1] ==  1 ) ret = max(ret, 2 * (n - i));     return ret;   }   void run() {     scanf( %d , &n);     scanf( %s , s);     assert(strlen(s) == n);     printf( %d n , solve());   }   int main() {     int ncase;     scanf( %d , &ncase);     for (int i = (1); i <= (ncase); ++i) run();     return 0;   }   