A curated list of problems to solve on Codeforces, Codechef and SPOJ?

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Can anybody suggest a list of must do problems from Codeforces, Codechef and SPOJ(or either one or two of them)?

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Well I feel that there could be some list prepared by someone for problems but maybe it won’t be (maybe it can’t be) best for you as the knowledge and practice on some topics differs from person to person…
You need to think in what type of problems you need more practice(the ques you found tough or you couldn’t solve)…
Is is DP or trees or Graphs or Greedy or Mathematical or sqrt decomposition or something else…
Though I liked you question and I do wanna suggest you some which I found interesting…
##MULTQ3
##POLY
##SEACO
##BROCLK
##STRMRG
##CHANOQ
##GCDCNT
##PSHTRG
##PALIN
##WORDS1
Moreover If you want problems of a specific type then here is a discussion on this community…

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This codeforces blog contains interesting problems covering most of the topics.

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Thanks a tonne. This should do for me :).