求翻译：在近几年的信息学竞赛中，图论题目层出不穷。图论作为一个新生的数学分支，相比其他数学分析来说，具有许多自有的特性。利用图论解题，通常具有高效简捷的便利。有了这门工具，并不意味就能很好地解决问题，还在于我们能否熟练地识别与建立一系列的图论模型。本文通过一些实例，简单地介绍一下图论建模的方法。是什么意思？

In recent years, competition in information science, graph theory topic after another. Graph theory as a new branch of mathematics, compared with other mathematical analysis, it has many of its own characteristics. Use of graph theory problem-solving, often have the convenience of simple and efficie

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In recent years information study competition, the graph theory topic emerges one after another incessantly.The graph theory took a newborn mathematics branch, compares other mathematical analysis, has many innate characteristics.Using the graph theory problem solving, usually has the highly effecti

Informatics competitions in recent years, endless stream of graph theory topics. Graph theory as a new branch of mathematics, mathematical analysis, compared to other, has a number of its own characteristics. Using graph theory to solve problems, often is an efficient simple and convenient. With thi