:-)

1.  https://github.com/gibsjose/cpp-cheat-sheet/blob/master/Data%20Structures%20and%20Algorithms.md 2.  https://github.com/dimkatsi91/Cpp-STL-Examples 3.  https://github.com/yiranyyu/STL-note/tree/master/STL_note 4.  https://github.com/Bhupesh-V/30-seconds-of-cpp 5.  https://gist.github.com/alyssaq/6743129

https://www.geeksforgeeks.org/inputoutput-external-file-cc-java-python-competitive-programming/

https://www.geeksforgeeks.org/fast-io-for-competitive-programming/

1. geeksforgeeks.org/find-number-of-triangles-possible/