Yes am not saying that but it is, you just need to get things for the basics
Two methods
- Recursive Top Down Memoization
- Iterative Bottom Up Tabulation
Coin Change II https://leetcode.com/problems/coin-change-ii/
- Paste each line of the problem in the code as comments this will make understanding easier
- Take a look at the examples input and outputs
- Write a short summary of the problem
- Now think of those small independently
- Take ith or skip ith ... and so on
- Now simulate an general example let say ith.
- Recursion is your friend then
Lets sum up
DP = Decision parameterization