it is always easy to code first problem which can be done by brute force algo (no more prerequisite) but second to i’th problem takes time.
I need guidance on
1 how to approach them?
2 how many algo exist to solve one normal problem?
3 what are the sources and sequence to practice them?
The only thing you should do is practice . If you are not able top solve a problem during the contest , wait for the editorials an try to solve the problem by learning those editorials . There are many websites to practice . You should first enhance your data structure and algorithmic knowledge . You can read CLRS and many other books or read good tutorials from various websites . There is no as such count of how many algorithms are there .
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