SPFA的两个优化(转)
scturtle
posted @ 2010年8月26日 08:36
in algorithm
, 3570 阅读
转自:http://aceeca1.frostbytez.com/index.php/archives/SPFA%E4%BC%98%E5%8C%96
SLF:Small Label First 策略。
实现方法是,设队首元素为 ,队列中要加入节点 ,在 时加到队首而不是队尾,否则和普通的 SPFA 一样加到队尾。
LLL:Large Label Last 策略。
实现方法是,设队列 中的队首元素为 ,距离标号的平均值为 ,每次出队时,若 ,把 移到队列末尾,如此反复,直到找到一个 使 ,将其出队。
2022年9月29日 15:03
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