export ORIGINAL_PATH=$PATH
export ORIGINAL_PS1=$PS1
export PATH=$(dirname $BASH_SOURCE):$PATH
export PS1="\[$(tput setaf 2)\]_euler-gerbil_\[$(tput sgr0)\]\u@\h:\w$ "
euler_exit () {
export PATH=$ORIGINAL_PATH
export PS1=$ORIGINAL_PS1
echo -e "\n\nExiting euler problems environment...\n\n\nBye!\n"
}