For programmers to do a job and do good work the data and algorithms are among the key topics. The basis for good code writing is a clear understanding of data structures and algorithms. You can decide how to apply the data structure and calculate processor and memory price when you know simple structure knowledge, such as tablets, strings, connected lists, the tree, charts, as well as advanced data structure, such as trials and autonomous trees such as AVL trees. But for example, as any large SDK program does, your own array, linked list or hashable should not be written. You need to grasp JDK or C++ in order to be able to use the library in the right place. In our colleges and universities, we will all study information structures and algorithms.EXPLAIN