anchor.diff:  	vim \
   	wget
   
  -RUN wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key|apt-key add - \
  - && apt-add-repository "deb http://apt.llvm.org/xenial/ llvm-toolchain-xenial-8 main" \
  +RUN wget -q -O - https://apt.llvm.org/llvm-snapshot.gpg.key|apt-key add - \
  + && apt-add-repository "deb http://apt.llvm.org/cosmic/ llvm-toolchain-cosmic-8 main" \
    && apt-get update \
    && apt-get install -y clang-8 clang-format-8 clang-tools-8
   
  
positive.code: FROM ubuntu:16.04
  
  ENV DEBIAN_FRONTEND noninteractive
  
  RUN apt-get update && apt-get install -y dirmngr
  RUN apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 86B72ED9 && echo "deb http://mirror.mxe.cc/repos/apt xenial main" > /etc/apt/sources.list.d/mxeapt.list
  
  RUN apt-get update && apt-get install -y \
  	astyle \
  
negative.code: 	graphviz \
  	make \
  	mxe-i686-w64-mingw32.static-gcc \
  	pdftk-java \
  	poppler-utils \
  	python3-pip \
  	software-properties-common \
  