GitHub - online-judge-tools/oj: Tools for various online judges. Downloading sample cases, generating additional test cases, testing your code, and submitting it. is a command line tool to automate things in solving problems, e.g. downloading and/or testing sample cases, and submitting code.
Of course Toph is one of the supported services. Please use it 
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@kimiyuki Thank you for sharing this! 
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how do I use it actually?