本文详细介绍了2-STAR算法，此算法在图论里面具有较高的地位，本文详细推到了染色算法的时间复杂度O(e).具有较高的学术价值。-This paper describes a 2-STAR algorithm, the algorithm in graph theory, which has a higher status, the paper pushed to the coloring algorithm of time complexity O (e). Has high academic