http://www.onlinevideolecture.com/computer-science/nptel-iit-delhi/data-structures-and-algorithms/?course_id=163
http://nptel.ac.in/video.php?subjectId=106102064
http://www.youtube.com/watch?v=s-CYnVz-uh4
mit open course
http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/
http://v.163.com/special/opencourse/algorithms.html
http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-042j-mathematics-for-computer-science-spring-2010/
Mathematics for Computer Science
http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-042j-mathematics-for-computer-science-fall-2010/video-lectures/