Randomized Algorithms. Morteza ZadiMoghaddam Amin Sayedi. Types of Randomized algorithms. Las Vegas Monte Carlo. Las Vegas. Always gives the true answer. Running time is random. Running time is bounded. Quick sort is a Las Vegas algorithm. Monte Carlo. It may produce incorrect answer!
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Suppose A1 < … < An.
We want Ai, such that i ≥ n/2.
It’s obvious that the best deterministic algorithm needs O(n) time to produce the answer.
n may be very large!
Suppose n is 100,000,000,000 !
Have a nice randomized life