なでしこーだー is a chrome extension that allows users to solve and submit problems on AtCoder using the web version of the Japanese programming language "なでしこ". Developed by axt-one, this extension utilizes the language engine of "なでしこ３" to automatically convert source code written in "なでしこ３" into JavaScript and submit it to AtCoder.

With なでしこーだー, users can solve AtCoder problems using the intuitive and user-friendly "なでしこ３" language, and then seamlessly submit their solutions to AtCoder for testing and evaluation. This extension streamlines the process and eliminates the need for manual code conversion, saving time and effort for programmers.

Please note that "なでしこーだー" is an unofficial extension for both "なでしこ" and AtCoder.