Contest Added

1. Shaastra 2012
2. Codeforces Round 159
3. Codeforces Round 160 (DIV 1)
4. Codeforces Round 161
5. Evernote Challenge Solutions
6. Bitwise, IIT Kgp, 2013
7. Codechef Jan13 Long
8. Codechef Jan13 Short
9. Codeforces 162
10. Codeforces 163
11. Codechef FEB13 Long
12. Codeforces 174
13. Codeforces 175
14. Codeforces 179

Library Additions

1. Binary Index Tree
2. Matrix Exponentiation
3. Djikstra Algorithm