Minimum Time Traversal

[S18APP-OL0021 (KETAN KUMAR)]

Hi,

Can anyone provide hints to solve this question?
Hackerblocks link: https://hack.codingblocks.com/contests/c/204/870
How can we select which combination of pipelines to use?

Thanks

[O17LPOLC0033 (ABHISHEK RANJAN)]

Use recursion as the constraints is very small . Try out all possibilities at every recursive call