Ask HN: Recommended course/website/book to learn data structure and algorithms

I am a full-time Android developer who does most of his programming work in Java. I am a non CS graduate so didn't study Data structure and algorithms course in university so I am not familiar with this subject which is hindering my prospect of getting better programming jobs. There are so many resources out there on this subject that I am unable to decide which one is the best for my case. Could someone please point me out in the right direction. Thanks.