Warning: session_start(): open(/var/lib/php/sessions/sess_q9i0v1jgtpto7psctjjql43dnn, O_RDWR) failed: No space left on device (28) in /var/www/tb-usercake/models/config.php on line 51

Warning: session_start(): Failed to read session data: files (path: /var/lib/php/sessions) in /var/www/tb-usercake/models/config.php on line 51
// returns (row, col) or null static Pair indexOfIndexOf(LL l, A a) { for i over l: { L row = l.get(i); int j = row.indexOf(a); if (j >= 0) ret pair(i, j); } null; }