By Andreas S. Schulz, Dorothea Wagner

This booklet constitutes the refereed complaints of the 22st Annual ecu Symposium on Algorithms, ESA 2014, held in Wrocław, Poland, in September 2014, as a part of ALGO 2014. The sixty nine revised complete papers offered have been conscientiously reviewed and chosen from 269 preliminary submissions: fifty seven out of 221 in tune A, layout and research, and 12 out of forty eight in music B, Engineering and functions. The papers current unique learn within the components of layout and mathematical research of algorithms; engineering, experimental research, and real-world purposes of algorithms and knowledge structures.

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Additional info for Algorithms - ESA 2014: 22th Annual European Symposium, Wroclaw, Poland, September 8-10, 2014. Proceedings

Example text

For example, the concatenation of two sequences each made of two chunks of size 1 produces a sequence made of three chunks of size 1, 2, and 1. Concatenating two such sequences produces a sequence made of chunks of size 1, 2, 2, 2, and 1. By iterating the process, we obtain an arbitrarily-long sequence made of sparse chunks containing no more than 2 items each. This example demonstrates that a provably efficient chunking strategy requires techniques to prevent sparse chunks from being formed. Theory and Practice of Chunked Sequences 3 29 Efficient Chunked Sequences One of our main results is a theorem (Theorem 1 below) that shows that chunking can be applied to any (underlying) sequence data structure.

Chargu´eraud, and M. Rainey limitations that can lead to significantly degraded performance and underutilization of memory (space) by breaking the amortization benefits of chunking. Push-Pop Sequences. A common chunking strategy is to create and dispose of chunks on a need by need basis. For example, to push an item x to the front of a sequence, we first check if there is space in the first chunk. If so, we push x into that chunk. Otherwise, we create a new chunk, place x in it, and push this chunk to the front.

If b is not empty, in which case it must be full, we swap b with f . Otherwise, if b is empty, we swap b with f . ) At this point, the front-outer buffer is not empty, so we can pop from this buffer. push-Buffer-Back. This auxiliary function is used to implement concat. When applied to a middle sequence m and to a chunk c, the function push-buffer-back modifies m so as to concatenate the items from c at its back, proceeding as follows. If c is empty, there is nothing to do. Otherwise, we perform the following two steps.

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