Return a number of distinct elements in a container. Instead, the main problem is that many problems require a container with greater functionality.įor example, we may need one or more of the following operations:ĭetermine whether a string is present in the container. The problem is not that arrays are limited (though, for example, it’s impossible to determine the size of array at runtime).
In native C (not C++) there was only one type of container: the array. ContainersĪny time you need to operate with many elements you require some kind of container. The simplest way to get familiar with STL is to begin from its containers. In it, we will review some of the powerful features of the Standard Template Library (STL) – a great tool that, sometimes, can save you a lot of time in an algorithm competition. Regardless of where you’re coming from, this article can help. Or perhaps you are not a C++ programmer, but want to become one because of the great functionality of this language and its libraries (and, maybe, because of the very short solutions you’ve read in TopCoder practice rooms and competitions).
#Stl vector code code#
You may have noticed, though, that many coders manage to write their code much more quickly and concisely than you. This means that you have already used STL in a simple way, because arrays and strings are passed to your function as STL objects. Perhaps you are already using C++ as your main programming language to solve Topcoder problems. By DmitryKorolev– Topcoder Member Discuss this article in the forumsĬontainers Before we begin Vector Pairs Iterators Compiling STL Programs Data manipulation in Vector String Set Map Notice on Map and Set More on algorithms String Streams Summary
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