I am getting TLE in this problem. I used lazy propagation with co-ordinate compression.
Link of the problem:- http://www.spoj.com/problems/POSTERS/
Code:- https://pastebin.com/cy0Zvx0Q
How do I apply co-ordinate compression here ?
If points (1,4), (2,6), (8,10), (3,4), (7,10). If I sort it and stor the indices in hashmap, then (1,2,3,4,6,7,8,10) will be compressed to (1,2,3,4,5,6,7,8).If I compress it this way then it fails for this test case.
6
1 3
4 6
6 7
8 1
1 2
3 4
I get answer as 4 because poster 2 at point (5,5) is not stored here as we have no index for 5.
I am newbie to this topic. Any help would be appreciated.