QOJ.ac

QOJ

時間限制: 1 s 記憶體限制: 1024 MB 總分: 100 可 Hack ✓

#17926. 초콜릿 나눠 팔기

统计

Coco 经营着一家巧克力工厂。该工厂的机器生产 $3 \times N$ 大小的矩形巧克力块。Coco 计划将这块巧克力分割成 $\lfloor \frac{3N}{2} \rfloor$ 个大小为 $1 \times 2$ 或 $2 \times 1$ 的巧克力块进行销售。不知为何,$N$ 总是奇数,因此 Coco 决定选择一个 $1 \times 1$ 的小块吃掉,然后将剩下的部分分割销售。给定 $N$ 的值以及 Coco 吃掉的小块的位置(第 $R$ 行第 $C$ 列),请计算将剩下的巧克力块分割的方法数。

输入格式

第一行包含测试用例的数量 $T$。对于每个测试用例,在一行中给出 $N$、$R$ 和 $C$ 的值。

输出格式

在每行中输出每个测试用例的答案。由于答案可能非常大,请输出模 $10^9+7$ 后的余数。

样例

样例输入 1

3
5 1 1
5 2 2
5 1 2

样例输出 1

15
8
0

说明

$1 \le T \le 100000$,$1 \le N \le 100000$,$1 \le R \le 3$,$1 \le C \le N$,$N$ 是奇数。

Discussions

About Discussions

The discussion section is only for posting: General Discussions (problem-solving strategies, alternative approaches), and Off-topic conversations.

This is NOT for reporting issues! If you want to report bugs or errors, please use the Issues section below.

Open Discussions 0
No discussions in this category.

Issues

About Issues

If you find any issues with the problem (statement, scoring, time/memory limits, test cases, etc.), you may submit an issue here. A problem moderator will review your issue.

Guidelines:

  1. This is not a place to publish discussions, editorials, or requests to debug your code. Issues are only visible to you and problem moderators.
  2. Do not submit duplicated issues.
  3. Issues must be filed in English or Chinese only.
Active Issues 0
No issues in this category.
Closed/Resolved Issues 0
No issues in this category.