Beam search: is a heuristic search algorithm that is an optimization of best-first search that reduces its memory requirement. Beam stack search: integrates backtracking with beam search. Best-first search: traverses a graph in the order of likely importance using a priority queue. Bidirectional search: find the shortest path from an initial vertex to a goal vertex in a directed graph. Bloom filter: a constant time and memory check to see whether a given element exists in a set.
Estimates vary as to how long it took to build the Taj Mahal. Some historians state that it took only 14 years to build it, from 1631-1645, but a more realistic figure is probably 22 years, being completed in 1653.
Building the TAJ MAHAL commenced about 1632. More than 20,000 workers were employed from India, Persia, the Ottoman Empire, and Europe to complete the mausoleum itself by about 1638-39; the adjunct buildings were finished by 1643, and decoration work continued until at least 1647.