ac-predictor

Predict AtCoder's performance during the contest

θα χρειαστεί να εγκαταστήσετε μια επέκταση όπως το Tampermonkey, το Greasemonkey ή το Violentmonkey για να εγκαταστήσετε αυτόν τον κώδικα.

You will need to install an extension such as Tampermonkey to install this script.

θα χρειαστεί να εγκαταστήσετε μια επέκταση όπως το Tampermonkey ή το Violentmonkey για να εγκαταστήσετε αυτόν τον κώδικα.

θα χρειαστεί να εγκαταστήσετε μια επέκταση όπως το Tampermonkey ή το Userscripts για να εγκαταστήσετε αυτόν τον κώδικα.

You will need to install an extension such as Tampermonkey to install this script.

Θα χρειαστεί να εγκαταστήσετε μια επέκταση διαχείρισης κώδικα χρήστη για να εγκαταστήσετε αυτόν τον κώδικα.

(Έχω ήδη έναν διαχειριστή κώδικα χρήστη, επιτρέψτε μου να τον εγκαταστήσω!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(Έχω ήδη έναν διαχειριστή στυλ χρήστη, επιτρέψτε μου να τον εγκαταστήσω!)

Δημιουργός
keymoon
Ημερήσιες εγκαταστάσεις
12
Σύνολο εγκαταστάσεων
17.759
Βαθμολογίες
16 2 0
Έκδοση
2.0.12
Δημιουργήθηκε την
01/07/2018
Ενημερώθηκε την
09/11/2025
Μέγεθος
70 KB
Άδεια
MIT
Εφαρμόζεται σε

Important Notice

For any issues, please report them as an issue on GitHub.

Regarding External Communication

This script communicates with external servers. The communication is strictly used for the following:

For detailed information about this data and why it must be fetched from external sources, please refer to the documentation. Since we only handle data retrieval, no account information or submission data is transmitted through this communication.

Details Technical details (as of December 2020) are available at The Technology Behind ac-predictor - Qiita. Below is a summary of sections relevant to external communication.

Why the Script Needs to Communicate with External Sites

For performance prediction, we require a value called APerf, which is calculated based on each participant's past performance.
If each user were to retrieve this value individually, it would result in approximately 10,000 requests per user. Considering load issues, we've implemented a system that aggregates these requests and computes APerf in batch, then distributes the results.

About APerf

APerf is a special rate used in performance calculations, derived from a weighted average of past performances. For detailed information, please refer to AtCoder's Rate Calculation Formula - Qiita. (This is the "internal rate" referred to in this article.)

About the Source Code

This script consists of approximately 1,000 lines of code. It was created using a tool to consolidate multiple files that originally existed as separate files. For those wishing to examine the script's source code, we recommend reading the pre-bundled source at this location. You can verify that running pnpm bundle at commit time for version updates produces identical script outputs.

Feature Description

Predictor

Adds a row to the rankings page displaying each participant's performance score and rating.

Estimator

Displays the value needed to achieve a specific rating or the rating you would have achieved with a particular performance score. The functionality can be toggled using the "Swap" button.