TCS is working on a new project called "TestVita". There are N modules in the project. Each module (i) has completion time denoted in number of hours (Hi) and may depend on other modules. If Module x depends on Module y then one needs to complete y before x.
As Project manager, you are asked to deliver the project as early as possible.
Provide an estimation of amount of time required to complete the project.
First line contains T, number of test cases.
For each test case:
First line contains N, number of modules.
Next N lines, each contain:
(i) Module ID
(Hi) Number of hours it takes to complete the module
(D) Set of module ids that i depends on - integers delimited by space.
Output the minimum number of hours required to deliver the project.
1. 1 <= T <= 10
2. 0 < N < 1000; number of modules
3. 0 < i <= N; module ID
4. 0 < Hi < 60; number of hours it takes to complete the module i