34  Algorithm Analysis and Complexity 
34  Hashing
20  Skiplist/AVL/Binary trees/Other
12  Quadtrees and spatial data

Q   Weight   Topic
------------------------------------------------------
1       12   complexity analysis
2       12   asymptotics
3       10   asymptotics
4       12   hashing
5       10   hashing
6       12   hashing
7       10   skiplist/AVL/BST/other mechanics
8       10   skiplist/AVL/BST/other mechanics
9       12   spatial data and PR quadtree