Data Structures
Arrays [495]
Strings [334]
Tree [147]
Hash [120]
Matrix [89]
Graph [72]
Stack [51]
Queue [29]
Map [25]
Heap [20]
Trie [7]

Algorithms
Sorting [103]
Bit Magic [100]
Numbers [48]
Greedy [43]
DFS [31]
sieve [31]
series [30]

Languages
Java [510]
CPP [194]
C [95]
SQL [62]
CSharp [19]
PHP [7]
HTML [5]
XML [4]
Perl [1]

Others
Puzzles [63]
Misc [61]
STL [46]
Linux [40]
memory [10]
Hadoop [6]
Spring [6]
sap [3]
Sqoop [1]
parser [1]
UML [1]