CF2216B THU Packing Puzzle

There are three types of 2D blocks: T-shaped, H-shaped, and U-shaped. Their exact shapes are shown in the figure below:  You are given three non-negative integers $ c_T $ , $ c_H $ , and $ c_U $ , representing the numbers of T-shaped, H-shaped, and U-shaped blocks, respectively. Your task is to pack all $ (c_T + c_H + c_U) $ blocks into an $ n \times 3 $ grid, following these rules: - Every block must be placed entirely inside the grid; - No two blocks may overlap (i.e., no unit cell can be covered by more than one block); - Blocks can be rotated by any multiple of $ 90^{\circ} $ , but their edges must remain parallel to the grid borders. You have to find the minimum possible value of $ n $ for which such a packing exists.

Each test contains multiple test cases. The first line contains the number of test cases $ t $ ( $ 1 \le t \le 10^4 $ ). The description of the test cases follows. The only line of each test case contains three integers $ c_T $ , $ c_H $ , and $ c_U $ ( $ 0\le c_T,c_H,c_U\le 10^9 $ , $ c_T+c_H+c_U \gt 0 $ ) — the numbers of T-shaped, H-shaped, and U-shaped blocks, respectively.

For each test case, output a single integer — the minimum possible value of $ n $ .

The optimal solutions for the first three test cases are listed below: