I am trying to solve this question.
I have made use of unordered map to store the frequency of each doll size and then I count the sets by subtracting the difference between the consecutive frequency, If we are considering element a then we look for the frequency of element a-1, if the frequency of element a-1 is less than frequency of element a, then we increase the count of set by frequency(a)-frequency(a-1). It seems to be working fine but I am getting TLE in test case 28. Here, is my submission.
Why am I getting TLE? Please suggest changes to remove this TLE error.
I will be thankful for any help!
This case is pretty typical
iirc it's because the time complexity of
unordered_mapcan be blown up to $$$O(n^2)$$$.you can see this post for more information
Change unordered_map to map
Don't forget Worst time complexity of Hash-map is O(N) not O(log(N))
i have submitted 219563923 you same code by changing unordered_map to map and it got accepted