Instructions:

Paste your code i.e. BlockChain.java in this directory and run using the following set of commands

1) javac -cp blockChainGrader.jar:algs4.jar:rsa.jar:. DropboxTestBlockChain.java
2) java -cp blockChainGrader.jar:rsa.jar:. DropboxTestBlockChain

Jar Files:

1) rsa.jar: Contains classes for using RSAKeys
2) algs4.jar: Contains some useful classes like defining priority queues, stacks, etc.
3) blockChainGrader.java: Contains classes used for grading the submitted files.