(Intended for HC, Windows)

Say your filename is a.cpp. First compile to create executable (named as a.exe). You may use -std=c++11 or -std=c++14 etc too. You may change stack size too.

> g++ -O2 -std=c++17 -Wall -Wl,--stack=268435456 a.cpp -o a.exe

If your input filename is input.txt and intended output filename is output.txt,

> a.exe < input.txt > output.txt