I was solving a problem 2119B - Line Segments and here is approach 336217184

What is wrong with this approach?

For question 1716D - Chip Move I have submitted this solution 285688107 which gives TLE.

Afterwards, I just changed the long[] to int[] in the solution and to my surprise it got accepted!! 285691655

I mean why, just changing from long[] to int[] eliminated the whole TLE?