Data Structures
Arrays [474]
Strings [333]
Tree [138]
Hash [115]
Matrix [88]
Graph [63]
Stack [50]
Queue [27]
Map [23]
Heap [18]
Trie [7]

Algorithms
Bit Magic [100]
Sorting [98]
Numbers [47]
Greedy [44]
series [28]
DFS [26]

Languages
Java [510]
CPP [192]
C [95]
SQL [62]
CSharp [19]
PHP [7]
HTML [5]
XML [4]
Perl [1]

Others
Puzzles [63]
Misc [62]
STL [45]
Linux [40]
memory [10]
Hadoop [6]
Spring [6]
sap [3]
UML [1]
Sqoop [1]
parser [1]