Incorrect implementations of the Floyd--Warshall algorithm give correct solutions after three repeats

Published 2 Apr 2019 in cs.DS | (1904.01210v1)

Abstract: The Floyd--Warshall algorithm is a well-known algorithm for the all-pairs shortest path problem that is simply implemented by triply nested loops. In this study, we show that the incorrect implementations of the Floyd--Warshall algorithm that misorder the triply nested loops give correct solutions if these are repeated three times.

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