This problem looks hard at the beginning, however, if you read it carefully and figure our all possible things that can define the unique states, you will find the solution.
The worst case each time we find one recipe. The total complexity will be
O(sizeof(recipes)*sizeof(recipes)*sizeof( ingredient)) = O(100³)…
This is the 4th problem of this week’s LC weekly contest.
We can change the problem to find the LIS for each subsequence with index of
A well know problem of longest increasing or non decreasing subsqeuence problem. By…
For the problem listed here, it is quite interesting as we can:
Here is my observations:
Union Find is a natural way to combine different sets with connection into one set. So the basic idea is:
This week’s (weekly 268)last question can be solved by checking all the possible numbers in a brute force way. In order to construct all the possible candidates, we can use backtracking based on standard approaches. If you are using python, luckily, we can use itertools.porduct…
Are you sure you really master the UF data structure/algorithm? If you are, you can use this question to verify your skills of using UF. This is the 4th question of the LC weekly 267 contest. It is pretty fun.