Do you use online-judge-tools? If not, it is valueable tool to try.

Your operation in competitive programming will become automated and the competition programming experience will be comfortable.

Good tutorial is here.

online-judge-tool seems simple, but if you execute, oj test --help you can find about 20 command line options for oj test.

Other subcommand (login, download and etc.) have many command line options.

Therefore, today I want to my favorite online-judge-tools features.

1. Side-by-Side diff

This is very new feature.

And you

1. Float error judge

Some problem requires floating point output. (ex. 2.500000) In many situation, relational and absolute error is allowed for these problems.

oj test can handle these errors by -e option.

If problem expectation 3 and your program outputs 3.00000001

$ oj t -c 'echo 3.00000001'
[*] 1 cases found

[*] sample-1
[x] time: 0.004793 sec
[-] WA
output:
3.00000001

expected:
3

In this situation, oj recognize your output as "Wrong Answer". But if you indicated allowed error by -e option,

$ oj t -c 'echo 3.00000001' -e 0.000001
[*] 1 cases found

[*] sample-1
[x] time: 0.004088 sec
[+] AC

Good, oj result becomes "All Correct". Here, oj t -c 'echo 3.00000001' -e 1e-5 is equivalent with oj t -c 'echo 3.00000001' -e 0.000001.

1. MLE and TLE checking

Almost of problems

oj t -c './a.out' --mle 56 oj t -c './a.out' --tl2 2.5

oj test

1. API

This is feature for developers.