Data Structures
Arrays [696]
Strings [523]
Hash [197]
Matrix [142]
Tree [141]
Graph [103]
Stack [89]
Queue [52]
Heap [47]
Map [32]

Algorithms
Bit Magic [147]
Searching [126]
Numbers [62]
Greedy [58]
sieve [53]
DFS [46]
BFS [29]

Languages
Java [175]
CPP [161]

Others
OOP [7]
Class [6]