https://www.hackerearth.com/problem/algorithm/submatrix-queries-7e459f97/
can anybody explain how to solve this problem for 100 points?
…It’s not a live contest question.
thank you in advance!!
https://www.hackerearth.com/problem/algorithm/submatrix-queries-7e459f97/
can anybody explain how to solve this problem for 100 points?
…It’s not a live contest question.
thank you in advance!!
You can check out my solution: https://www.hackerearth.com/submission/22611281/
The short explanation of my solution is to have a dynamic segment tree for each possible value of x (only 0-255). Then for each value x in the array, add it to every segment tree that represents a value whose bit representation is a subset of the bit representation if x. Then for each query use inclusion exclusion on supersets of the desired value in bit representation.
I know this is a quick and dirty explanation. Feel free to ask follow up questions after reading the code.
@benjyamin , can you give the idea on how to solve that 'superior substring ’ question, was stuck on it for days, but never got more than 66 points after all the possible optimization((s)), can you explain the idea/solution ?
Thanks in advance!
Please explain how to solve the AND QUERY problem, and if possible make a editorial for it.
Link : https://www.hackerearth.com/problem/algorithm/submatrix-queries-7e459f97/