C86 A Crushing Victory

As Wang Chenggang brimmed with questions and anticipation, Qin Anyi had already effortlessly solved the second question and, without pause, began writing the solution to the third. Meanwhile, the entire Grade 12 Class 2, except for Yan Tao who was still toiling away at the blackboard, had their eyes glued to Qin Anyi's work.

After scrutinizing the process for a few minutes