• Codeblocks: https://www.codeblocks.org/downloads/binaries/
• Sublime Text: https://www.sublimetext.com
• Visual Studio Code: https://code.visualstudio.com
• MinGW: https://sourceforge.net/projects/mingw/
• IDE Usaco Guide : https://ide.usaco.guide/NLpwavYzPmGnkwOMZZU
• Python to C++ converter: https://www.javainuse.com/py2cpp
• Java to C++ converter: https://kalkicode.com/ai/java-to-cplusplus-converter-online
• Current contests: https://clist.by
• Sheet for more problems: https://docs.google.com/spreadsheets/d/1aUD4QNIEvofoGvSYY4b87fnGYYnNj6uZYvdlda1GY7M/edit?usp=sharing
• Problems generator: https://a2oj.herokuapp.com
• Improve your typing skills: https://play.typeracer.com
1- France-ioi: www.france-ioi.org
2- USACO Guide: https://usaco.guide
3- DMOJ: www.dmoj.ca
4- AtCoder: https://atcoder.jp
5- HackerRank: https://www.hackerrank.com