We will hold AtCoder Regular Contest 165.

• Contest URL: https://atcoder.jp/contests/arc165
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20230917T2100&p1=248
• Duration: 120 minutes
• Number of Tasks: 6
• Writer: chinerist
• Tester: maspy, potato167
• Rated range: — 2799

The point values will be 400-600-600-700-700-800.

We are looking forward to your participation!

We will hold AtCoder World Tour Finals 2022.

List of Finalists:

Day1

• Contest URL: https://atcoder.jp/contests/wtf22-day1
• Mirror Contest URL: https://atcoder.jp/contests/wtf22-day1-open
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20230908T1300&p1=248
• Duration: 300 minutes
• Number of Tasks: 5
• Writer: maroonrk
• Tester: maspy, HIR180, satashun, rng_58, yutaka1999
• Rated range: 2000 -

The point values will be 500-1000-1500-2000-2500

Day2

• Contest URL: https://atcoder.jp/contests/wtf22-day2
• Mirror Contest URL: https://atcoder.jp/contests/wtf22-day2-open
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20230909T1300&p1=248
• Duration: 300 minutes
• Number of Tasks: 5
• Writer: maroonrk
• Tester: maspy, HIR180, satashun, rng_58, yutaka1999
• Rated range: 2000 -

The point values will be 1000-1500-2000-2000-2500

AtCoder World Tour Finals 2022 is an international onsite contest. We have invited top-runners of AtCoder Race Ranking 2019-2022 to Tokyo. We will combine the results of the two contests to decide on the champion. The score of the participant is calculated as (score of Day1) + (score of Day2) + (the number of Advancements to Finals). The time penalties are also summed. You will see this combined score in the standings during the contest. Considering that the special rules will affect strategies of participants, the Finals itself is unrated. Note that, unlike other onsite competitions, there's no freeze in the contest.

Mirror contests don't have special rules, so they are just two independent rated contests. They happen at the same time as the Finals (=13:00 in UTC+9), so they are much earlier than usual AtCoder contests.

We are looking forward to your participation!

UPD

With the help from lperovskaya and ICPC streaming tools, we will stream the Finals in our YouTube channel. Since we have rated mirrors, there is no commentary and we will only show the contest venue, webcam videos of Finalists, and standings.

We will hold AtCoder Grand Contest 064. This contest counts for GP30 scores.

• Contest URL: https://atcoder.jp/contests/agc064
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20230813T2100&p1=248
• Duration: 180 minutes
• Number of Tasks: 6
• Writer: m_99, leaf1415
• Tester: maspy
• Rated range: 1200 -

The point values will be 400-600-900-900-1300-1700.

We are looking forward to your participation!

We will hold AtCoder Grand Contest 063. This contest counts for GP30 scores.

• Contest URL: https://atcoder.jp/contests/agc063
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20230730T2100&p1=248
• Duration: 180 minutes
• Number of Tasks: 6
• Writer: maspy
• Tester: potato167, Nyaan
• Rated range: 1200 -

The point values will be 300-600-800-1200-1400-1700.

We are looking forward to your participation!

We will hold AtCoder Regular Contest 164.

• Contest URL: https://atcoder.jp/contests/arc164
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20230709T2100&p1=248
• Duration: 120 minutes
• Number of Tasks: 6
• Writer: riano_
• Tester: maspy, Nyaan
• Rated range: — 2799

The point values will be 300-500-500-600-700-900.

We are looking forward to your participation!

We will hold AtCoder Regular Contest 163.

• Contest URL: https://atcoder.jp/contests/arc163
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20230702T2100&p1=248
• Duration: 120 minutes
• Number of Tasks: 6
• Writer: PCTprobability
• Tester: maspy, Nyaan
• Rated range: — 2799

The point values will be 300-400-600-700-900-1100.

We are looking forward to your participation!

Original Post

AtCoder World Tour Finals 2022 will take place on Sep 8th and 9th. We have two contests, one for each day, and we will combine the results of the two contests to declare a champion.

Contest Day 1: https://atcoder.jp/contests/wtf22-day1

Contest Day 2: https://atcoder.jp/contests/wtf22-day2

To reward those who advanced to the Finals multiple times, we will introduce a special tie-breaker this time: a contestant will get X points before the start of the contest where X is the number of times they advanced to the Finals.

We will also offer mirror contests for them. They have the same problems as Finals and happen at the same time.

Mirror Contest Day 1: https://atcoder.jp/contests/wtf22-day1-open

Mirror Contest Day 2: https://atcoder.jp/contests/wtf22-day2-open

They are AGC-rated (people with 1200 or higher ratings will be rated) rated for people with 2000 or higher rating, but they don't count for GP30 points.

We will hold AtCoder Regular Contest 162.

• Contest URL: https://atcoder.jp/contests/arc162
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20230618T2100&p1=248
• Duration: 120 minutes
• Number of Tasks: 6
• Writer: tatyam, nok0
• Tester: maspy
• Rated range: — 2799

The point values will be 300-500-500-700-700-900.

We are looking forward to your participation!

We will hold AtCoder Regular Contest 161.

• Contest URL: https://atcoder.jp/contests/arc161
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20230528T2100&p1=248
• Duration: 120 minutes
• Number of Tasks: 6
• Writer: ygussany
• Tester: tatyam, potato167
• Rated range: — 2799

The point values will be 300-400-500-500-800-900.

We are looking forward to your participation!

We will hold AtCoder Grand Contest 062. This contest counts for GP30 scores.

• Contest URL: https://atcoder.jp/contests/agc062
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20230521T2100&p1=248
• Duration: 180 minutes
• Number of Tasks: 6
• Writer: chinerist
• Tester: maspy, HIR180
• Rated range: 1200 -

The point values will be 400-700-800-1100-1300-2000.

We are looking forward to your participation!

Recently we are experiencing DDoS attacks and our website can be unstable during the contest. To mitigate the risk that the contest gets unrated, we will upload the PDF statement when the rated registration is closed (i.e. 5 minutes after the contest starts). We will later post the link here.

Problem Statement (link).

We will hold AtCoder Regular Contest 160.

• Contest URL: https://atcoder.jp/contests/arc160
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20230514T2100&p1=248
• Duration: 120 minutes
• Number of Tasks: 6
• Writer: PCTprobability, Nyaan
• Tester: potato167
• Rated range: — 2799

The point values will be 400-500-500-700-800-900.

We are looking forward to your participation!

Problem Statement here.

It can happen that our website is unstable due to DDoS Attacks, and in that case, you can read the statement from the above link (we will upload the pdf when the contest starts). We would make the contest unrated only if the attack caused a significant inconvenience or unfairness.

We will hold AtCoder Regular Contest 159.

• Contest URL: https://atcoder.jp/contests/arc159
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20230408T2100&p1=248
• Duration: 120 minutes
• Number of Tasks: 6
• Writer: m_99
• Tester: maspy, Nyaan
• Rated range: — 2799

The point values will be 300-400-500-600-900-900.

We are looking forward to your participation!

We will hold AtCoder Regular Contest 158.

• Contest URL: https://atcoder.jp/contests/arc158
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20230312T2100&p1=248
• Duration: 120 minutes
• Number of Tasks: 6
• Writer: maspy
• Tester: potato167, Nyaan
• Rated range: — 2799

The point values will be 300-500-500-800-800-900.

We are looking forward to your participation!

We will hold AtCoder Regular Contest 157.

• Contest URL: https://atcoder.jp/contests/arc157
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20230225T2100&p1=248
• Duration: 120 minutes
• Number of Tasks: 6
• Writer: ygussany
• Tester: maspy, Nyaan
• Rated range: — 2799

The point values will be 300-500-600-600-700-900.

We are looking forward to your participation!

We will hold AtCoder Regular Contest 156.

• Contest URL: https://atcoder.jp/contests/arc156
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20230218T2100&p1=248
• Duration: 120 minutes
• Number of Tasks: 6
• Writer: chinerist, nok0
• Tester: maspy
• Rated range: — 2799

The point values will be 400-500-600-700-800-1000.

We are looking forward to your participation!

Original Post

We have held Race Rankings to choose AtCoder World Tour Finalist. However, after we postponed the World Tour Finals 2020 due to the pandemic, the rules of the 2020 to 2022 seasons were obscure.

This year, we finally decided to hold a combined AtCoder World Tour Finals for four seasons. There will be a single championship contest and some fun activities. The Finals will take place in August or September and we are communicating with the finalist to decide on the date.

In addition, we have published the rule for the 2023 season.

The major difference from the previous version is that we allow online participation for the Finals. This is because, though the pandemic is gradually settling down, the world situation is still turbulent when compared to the before-COVID era. We also allow people under 18 to take part in the Finals. The previous rule excluded underage participants because it was hard to invite them due to operational or legal reasons, and it would harm the integrity of the onsite event. However, we have an online option now, so there is no strong need for such a rule.

We will hold AtCoder Grand Contest 061. This contest counts for GP30 scores.

• Contest URL: https://atcoder.jp/contests/agc061
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20230212T2100&p1=248
• Duration: 180 minutes
• Number of Tasks: 6
• Writer: Endagorion
• Tester: Golovanov399, potato167
• Rated range: 1200 -

The point values will be 500-800-800-1000-1400-2000.

We are looking forward to your participation!

We will hold AtCoder Regular Contest 155.

• Contest URL: https://atcoder.jp/contests/arc155
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20230129T2100&p1=248
• Duration: 120 minutes
• Number of Tasks: 6
• Writer: chinerist
• Tester: tatyam, satashun
• Rated range: — 2799

The point values will be 400-500-700-800-900-1000.

We are looking forward to your participation!

We will hold AtCoder Regular Contest 154.

• Contest URL: https://atcoder.jp/contests/arc154
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20230122T2100&p1=248
• Duration: 120 minutes
• Number of Tasks: 6
• Writer: PCTprobability
• Tester: tatyam, maspy
• Rated range: — 2799

The point values will be 300-400-500-700-900-900.

We are looking forward to your participation!

We will hold AtCoder Regular Contest 153.

• Contest URL: https://atcoder.jp/contests/arc153
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20230114T2100&p1=248
• Duration: 120 minutes
• Number of Tasks: 6
• Writer: maspy
• Tester: potato167, satashun
• Rated range: — 2799

The point values will be 300-500-600-800-800-1000.

We are looking forward to your participation!

(Original post)

We've published the results of the GP30 race of the current and previous seasons.

• Season 2019
• Season 2020 (CSV Format)
• Season 2021 (CSV Format)
• Season 2022 (CSV Format)

We are planning to host an onsite WTF in 2023 with the top 8 contestants of each season. We'll announce more details of the Finals once we decide.

Above all, congrats to the all Finalists!

We will hold AtCoder Grand Contest 060. This contest counts for GP30 scores, and it's the last contest of this season.

• Contest URL: https://atcoder.jp/contests/agc060
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20221225T2100&p1=248
• Duration: 180 minutes
• Number of Tasks: 6
• Writer: maroonrk
• Tester: HIR180, satashun
• Rated range: 1200 -

The point values will be 400-700-800-1000-1400-2200.

We are looking forward to your participation!

We will hold AtCoder Regular Contest 152.

• Contest URL: https://atcoder.jp/contests/arc152
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20221120T2100&p1=248
• Duration: 120 minutes
• Number of Tasks: 6
• Writer: riano_
• Tester: maspy, Nyaan
• Rated range: — 2799

The point values will be 400-500-600-700-800-1000.

We are looking forward to your participation!

We will hold AtCoder Regular Contest 151.

• Contest URL: https://atcoder.jp/contests/arc151
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20221016T2100&p1=248
• Duration: 120 minutes
• Number of Tasks: 6
• Writer: leaf1415
• Tester: maspy, tatyam
• Rated range: — 2799

The point values will be 300-500-600-700-700-1000.

We are looking forward to your participation!

We will hold AtCoder Regular Contest 150.

• Contest URL: https://atcoder.jp/contests/arc150
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20221009T2100&p1=248
• Duration: 120 minutes
• Number of Tasks: 6
• Writer: chinerist
• Tester: maspy, satashun
• Rated range: — 2799

The point values will be 300-500-500-700-800-1000.

We are looking forward to your participation!