Preparation

The week before contest contained 2 team training sessions: 2022 China Collegiate Programming Contest (CCPC) Guilin Site and The 2021 CCPC Guilin Onsite (XXII Open Cup, Grand Prix of EDG), and we both got 1 problem above the gold medal line which enhanced our confidence. Our three teams, along with our coach (part of the contest committee), reached Jinan via high-speed railway a day prior to team registration.

Before the dress rehearsal, a flaw on the contest floor(literal) immediately drew our attention: there is a narrow drain hole beneath one of my teammates' chair and a chair leg might get caught up causing him to fall over, and later we found we are not alone. We called staff over and they fixed it with cardboard taped to the ground. But the bigger problem is the keyboard: the \ and Enter almost switched place(compared to usual keyboard layouts), so when typing cout << '\n' an actual carriage return plus an n will appear instead! To make things worse, it takes a smash to press down the right SHIFT and Backspace. The committee