算法 + 数据结构=程序。设计算法与选择合适的数据结构是程序设计中相辅相成的两方面，缺一不可。数据结构的选择一直是程序设计中的重点、难点，正确地应用数据结构，往往能带来意想不到的效果。-Algorithm+ data structure = program. Design algorithm and choose appropriate data structure is the program design of the two aspects supplement each other, be short of one cannot. The choice of data structure is always the key and difficult process design, the application of data structure correctly, often could be better than you thought the effect.