Data Structures
Arrays [587]
Strings [392]
Tree [165]
Hash [156]
Matrix [123]
Graph [89]
Stack [78]
Heap [41]
Queue [39]
Map [28]
Trie [14]

Algorithms
Bit Magic [123]
Greedy [52]
Numbers [48]
DFS [37]
sieve [31]
series [30]
BFS [26]

Languages
Java [512]
CPP [195]
C [95]
SQL [62]
CSharp [19]
PHP [7]
HTML [5]
XML [4]
Perl [1]

Others
Puzzles [63]
Misc [61]
STL [51]
Linux [40]
memory [10]
c-lang [1]
Sqoop [1]
parser [1]