Solutions to some popular questions
To run any Question make sure you have the essentials.cpp int he same directory as the questions is.
For Linux: First install g++ compiler on your system
Command: sudo apt-get install g++
g++ -std=c++11 "sample_problem.cpp" ./a.out
You can also provide the output file name along with g++ command above Replace sample problem with the the file name you want to run.