데이터구조, 알고리즘

http://www.topcoder.com/

http://blog.yyoon.net/software-engineer-job-search

http://www.improgrammer.net/9-puzzle-websites-to-sharpen-your-programming-skills/

수학방

http://mathbang.net/555

정올 알고리즘

http://jungol.co.kr/problemsetA.php?ctc=03

알고리즘 정리되어 있음.

http://xenostudy.tistory.com/72

알고리즘 논문?

http://www.aistudy.co.kr/algorithm/algorithm.htm

알고리즘 정리 블로그

http://studyinglw2.tistory.com/entry/Algorithm-1-Sort-algorithm-12-Insertion-Sort-algorithm-1

자료구조와 알고리즘

http://glocalit.skhu.ac.kr/~mckim1/Lecture/DS/dna/index.html

자료구조 실습

http://dblab.duksung.ac.kr/ds/about.html

LinkedList, ArrayList

http://www.nextree.co.kr/p6506/