Is your feature request related to a problem? Please describe.

Now we need to manually click "Uncheck Accepted" in the "More" menu of the test cases. Some users may want to automate this process.

Describe the solution you'd like

Add an option to auto-uncheck accepted test cases.

In #549, we added unittests for dispatch AtCoder and Codeforces.
To increasing test coverage, we should add unittests for other contest (HackerRank, CS Academy, ...).

Not only tests for all other contests, tests for the part of contests are welcome.

For C++ code, especially for Bronze through Gold, we should use (at most) the following template:

#include <bits/stdc++.h> // see /general/running-code-locally
using namespace std;

using ll = long long;

using vi = vector<int>;
#define pb push_back
#define all(x) begin(x), end(x)
#define sz(x) (int)(x).size()

using pi = pair<int,int>;
#define f first
#define s second
#def

Step 1 - Fork this repository.
Step 2 - Clone the repository to yuor local machine.
Step 3 - Resolve this bugs, mentions provided in the Issues section of the repository. Also add a description what changes you ahve done.
Step 4 - Add the changes to your repository.
Step 5 - Create a PULL Request. And that's all.
NOTE - Please start the filename with platform name on which theproblem was solv