Help req. What algorithm and data structure is needed to clear the easy section?

Hello. So I am new here and starting out Easy section problems, when I encountered first “Racing Horses” I needed sorting algorithm which I do not know. So can you tell me what algorithms and data structures do I need to learn so that I can clear the Easy section? TIA

Learn the basic ones like sorting, searching etc. Use any of resource to learn these basic ones cp-algorithms , gfg or maybe youtube or any book . Then practice problems and if encounter any new algo related with that question google it and learn it .
my opinion

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