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A linear-time algorithm for the longest path problem in rectangular grid graphs. (English) Zbl 1237.05115
Summary: The longest path problem is a well-known NP-hard problem and so far it has been solved polynomially only for a few classes of graphs. In this paper, we give a linear-time algorithm for finding a longest path between any two given vertices in a rectangular grid graph.

MSC:
05C38 Paths and cycles
05C45 Eulerian and Hamiltonian graphs
05C85 Graph algorithms (graph-theoretic aspects)
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