Macbook pro charger not working sometimes

Sometimes my macbook pro would not work.. but then other times it would work.. I don't know what's going on and what to do to fix it. My charger also started to be like this today.. on my 1 year anniversary with this macbook -_- Any solutions to?

Do a SMC Reset and follow the Magsafe links here
 Cheat sheet to help diagnose and fix your Mac
Backup your data!
 Most commonly used backup methods explained

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