Correct me if I'm wrong. For problem C, the answer for the test case:

9 7
60 58 57 42 77 1 94 10 78
51 98 42 51 5 42 44 96 77 
164

should be 4, right ? (consider 1 from first array and 42 51 5 42 from second)

However, the solutions of first few people (I checked only first few) in the standings is giving output as 3.

Endagorion please add this test case if applicable.

Thanks

Can anyone explain the derivation of formula for problem C ?

Thanks

Hi,

Can you point to some tutorial for the tree you're using ? I tried searching but couldn't find any.

Thanks

Coming up with danger zone interval was pretty neat. Thanks for the detailed explanation.

Hi, Can you please explain the if (rem) block of your code. Thanks.

PS. Those trying to understand problem E try to think of it as, given two points l and r on x-axis and a starting position k, you're allowed to move x units backward and y units forward.