How to use FLoyd algorithm to determine whether there is a negative weight ring

after running the Floyd algorithm, is it possible to judge whether the original (directed) graph has a negative weight cycle or not by traversing the diagonal elements of the matrix?

Clrs algorithm Graph-Theory-introduction-to algorithm
Nov.04,2021

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b3719e-2c06e.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3719e-2c06e.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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