CF1469B Red and Blue

Monocarp had a sequence $ a $ consisting of $ n + m $ integers $ a_1, a_2, \dots, a_{n + m} $ . He painted the elements into two colors, red and blue; $ n $ elements were painted red, all other $ m $ elements were painted blue. After painting the elements, he has written two sequences $ r_1, r_2, \dots, r_n $ and $ b_1, b_2, \dots, b_m $ . The sequence $ r $ consisted of all red elements of $ a $ in the order they appeared in $ a $ ; similarly, the sequence $ b $ consisted of all blue elements of $ a $ in the order they appeared in $ a $ as well. Unfortunately, the original sequence was lost, and Monocarp only has the sequences $ r $ and $ b $ . He wants to restore the original sequence. In case there are multiple ways to restore it, he wants to choose a way to restore that maximizes the value of $ $$$f(a) = \max(0, a_1, (a_1 + a_2), (a_1 + a_2 + a_3), \dots, (a_1 + a_2 + a_3 + \dots + a_{n + m})) $ $

Help Monocarp to calculate the maximum possible value of $ f(a)$$$.

The first line contains one integer $ t $ ( $ 1 \le t \le 1000 $ ) — the number of test cases. Then the test cases follow. Each test case consists of four lines. The first line of each test case contains one integer $ n $ ( $ 1 \le n \le 100 $ ). The second line contains $ n $ integers $ r_1, r_2, \dots, r_n $ ( $ -100 \le r_i \le 100 $ ). The third line contains one integer $ m $ ( $ 1 \le m \le 100 $ ). The fourth line contains $ m $ integers $ b_1, b_2, \dots, b_m $ ( $ -100 \le b_i \le 100 $ ).

For each test case, print one integer — the maximum possible value of $ f(a) $ .

In the explanations for the sample test cases, red elements are marked as bold. In the first test case, one of the possible sequences $ a $ is $ [\mathbf{6}, 2, \mathbf{-5}, 3, \mathbf{7}, \mathbf{-3}, -4] $ . In the second test case, one of the possible sequences $ a $ is $ [10, \mathbf{1}, -3, \mathbf{1}, 2, 2] $ . In the third test case, one of the possible sequences $ a $ is $ [\mathbf{-1}, -1, -2, -3, \mathbf{-2}, -4, -5, \mathbf{-3}, \mathbf{-4}, \mathbf{-5}] $ . In the fourth test case, one of the possible sequences $ a $ is $ [0, \mathbf{0}] $ .