User login [PreIOI Camp 2026. Contest 1.]

This is ejudge contest administration system, version 2.3.27 #664, compiled Wed May 13 00:22:22 2026.

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.