Many incorrect and non-clear advice/guidance being spread on the way to prepare and amount of coding problems to solve to get good at DSA and land up a good product based company..
Here is my take on it :
1) Every person is different , everyone has a different background in math, thinking and problem-solving before they start doing DSA , so putting up a random number "xyz" problems to solve will surely not work for most people out there.
2)Hence lets focus more on the strategy rather than the number . Breadth-First-Search technique works the best in this case as per my years of observation in DSA.
3)Say , you face a medium-hard problem in DSA , in most cases , it won't just require a single topic and its concept to solve it , it will be a mixture .
5)So , do a BFS strategy , solve things by level :)
A) You go through most important and basic concepts/fundamentals of different topics , you solve 10-40 standard popular concept building problems on each of those topics.
B) Now , your level is up , so do the same step A for bit harder problems of the same topic , but keep in mind , do step B only if step A is completed for all the topics :) In this process , its your choice to decide the number of problems to reach easy and medium and further levels :) Grow at your own pace !!
6)You can do topics in this order :
7)Resources for them : https://www.desiqna.in/4963/roadmap-for-dsa-data-structures-algorithms-kumar-desi-2022