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large amount of lines will crash your solution. And map fucntion need to make Boxing methinks and this takes much time
WTF!!! It's true! I had a time out problem with test case 7 up to 12 I think and my code is good enough and didn't know what to do...until I read your comment, I removed all the empty spaces and the debugging prints (System.out.println for Java 8) and it worked :O
This is true, I spent too much time trying figure out why my solution was timing out. Deleted some whitespace and it ran fine.
I have uploaded a video tutorial which can help you to understand the problem as well as logic.
Here is the video tutorial for my solution O(n+m) complexity.
Would really appreciate your feedback like, dislike , comment etc. on my video.