Otázky u Feldmanna

kačus at 2017-02-16 14:54:18

Otázky, které jsem potkala, slyšela:

  1. Fibonacci heaps

  2. Definition of c-universal system, perfect hashing and "with high probability" + S is set of elements, |S| = n, size of hash table m=Θ(n3)m=\Theta(n^3). Proof that hash function from c-universal system is perfect for S with high probability.


  1. (a,b)-trees + red-black trees

  2. You have a tabulation hashing with a small change: instead of XOR there is + and mod m:
    h(x)=i=0d1Ti(xi)modmh(x) = \sum_{i=0}^{d-1} T_i(x_i) \mod m
    Proof it is 2-independent, but not 4-independent. (Well, the proof is practiclly the same as for normal tabulation hashing.)


  1. Range trees

  2. Interval trees

  3. Some proof about Dijkstra