ZJU 2026 Premade Session Contest 2

Source: 2024-2025 ICPC NERC (NEERC), North-Western Russia Regional Contest

A - Another Brick in the Wall

分类讨论，$l$ 为奇数时候答案为 $h$，$l$ 为偶数时答案为 $\lfloor \frac{h}{2}\rfloor \times 2$。

C - Capybara Cozy Carnival

D - Defective Script

J - Just Half is Enough

若 $u_i<v_i$ 的对数 $\ge \lceil \frac{m}{2}\rceil$，则输出 $1,2,\cdots ,n$，否则输出 $n,n-1,\cdots ,1$。