how to solve questions on spoj

I recently started spoj. How to go for solving questions on it? I solved a few easy questions. But there is no way I can solve a question which is difficult because there are no editorials for questions on spoj. Moreover, people can’t see each others codes. So how can I solve a question on which I’m stuck?

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Google is your best friend!. If you are struck with a question just google it using the problem code, you can find the solutions, hints,…
PS: Please don’t immediately search for hint. First think of your best, and still if you can not, then you search for the hint.

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Google. Otherwise, in case you can’t find any solutions that way, you could always post here and ask for help.

Try to use basic topic to solve the questions or try a combination of them.

refer here for some basic topic needed to learn: http://discuss.codechef.com/questions/48877/data-structures-and-algorithms

Then try to solve random problems on spoj. Doing a problem without knowing the category it’s classified into gives mind a real way to develop habit of solving problems.

Besides you can try this anytime: http://problemclassifier.appspot.com/