We will hold AtCoder Regular Contest++ 228.

• Contest URL: https://atcoder.jp/contests/arc228
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260830T2100&p1=248
• Duration: 150 minutes
• Writer: PCTprobability
• Tester: maspy, Nyaan
• Rated range: 1600 — 2999
• Point Values: 800-800-900-1000-1200

We are looking forward to your participation!

We will hold AtCoder Beginner Contest 473.

• Contest URL: https://atcoder.jp/contests/abc473
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260829T2100&p1=248
• Duration: 100 minutes
• Writer: MMNMM, physics0523, vwxyz0, sheyasutaka
• Tester: sheyasutaka, kyopro_friends
• Rated range: ~ 1999
• The point values: 100-200-300-400-450-525-600

We are looking forward to your participation!

We will hold 13th Asprova Programming Contest（AtCoder Heuristic Contest 070）.

• Contest URL: https://atcoder.jp/contests/ahc070
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260829T1500&p1=248
• Duration: 4 hours
• Writer：HNN_8127
• Tester: iaNTU, Koi51, kozima, mya3, and others.
• Rated range: All (Heuristic Rating)

This contest is one of the qualifying contests for AWTF 2027.

Starting with this short contest, the use of generative AI will be prohibited, with limited exceptions. Please refer to this post for further details.

We are looking forward to your participation!

We will hold AtCoder Beginner Contest 472.

• Contest URL: https://atcoder.jp/contests/abc472
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260822T2100&p1=248
• Duration: 100 minutes
• Writer: harurun4635, KumaTachiRen, sheyasutaka
• Tester: math957963, cn449
• Rated range: ~ 1999
• The point values: 100-200-300-400-450-525-600

We are looking forward to your participation!

We will hold AtCoder Regular Contest 227.

• Contest URL: https://atcoder.jp/contests/arc227
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260816T2100&p1=248
• Duration: 120 minutes
• Writer: yosupo
• Tester: Nyaan, sigma425
• Rated range: 1200 ~ 2799
• Point Values: 400-500-700-700-700-800

We are looking forward to your participation!

We will hold AtCoder Beginner Contest 471.

• Contest URL: https://atcoder.jp/contests/abc471
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260815T2100&p1=248
• Duration: 100 minutes
• Writer: kyopro_friends, sheyasutaka
• Tester: vwxyz0, physics0523
• Rated range: ~ 1999
• The point values: 100-200-300-400-450-550-600

We are looking forward to your participation!

We will hold UNIQUE VISION Programming Contest 2026 Summer (AtCoder Regular Contest 226).

• Contest URL: https://atcoder.jp/contests/arc226
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260809T2100&p1=248
• Duration: 120 minutes
• Writer: snuke
• Tester: Nyaan, maspy
• Rated range: 1200 ~ 2799
• Point Values: 400-500-700-800-1000

We are looking forward to your participation!

We will hold JPRS Programming Contest 2026#2 (AtCoder Beginner Contest 470).

• Contest URL: https://atcoder.jp/contests/abc470
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260808T2100&p1=248
• Duration: 100 minutes
• Writer: sounansya, sheyasutaka, kyopro_friends
• Tester: vwxyz0
• Rated range: ~ 1999
• The point values: 100-200-300-400-450-500-600

We are looking forward to your participation!

We will hold AtCoder Beginner Contest 469.

• Contest URL: https://atcoder.jp/contests/abc469
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260801T2100&p1=248
• Duration: 100 minutes
• Writer: vwxyz0, cn449
• Tester: sounansya, sheyasutaka, harurun4635
• Rated range: ~ 1999
• The point values: 100-200-300-400-475-500-575

We are looking forward to your participation!

We will hold RECRUIT Nihonbashi Half Marathon 2026 Summer (AtCoder Heuristic Contest 069).

• Contest URL: https://atcoder.jp/contests/ahc069
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260731T1900&p1=248
• Duration: 10 days
• Staff：cozy_sauna, crinoid_t, dpforest, eha, fky_, FLOPPY_30, frnfnts, hamray, hashiryo, hedwig, japlj, kanra824, kys, miz56, n_knuu, roiti, ruthen71, samasama, shichinomiya, shiratty8, smiken, sugim48, tomerun, yupiteru, yusk, and others.
• Rated range: All (Heuristic Rating)

AtCoder Heuristic Contest (AHC) is a series of programming contests held regularly on AtCoder. Unlike algorithm contests such as ABC/ARC/AGC, the goal is to create a better solution to a problem for which it is difficult to find the optimal solution.

This contest is one of the qualifying contests for AtCoder World Tour Finals 2027 to crown the world champion of AtCoder players.

After the contest ends, all participants can post their approach on the Editorial tab. Please share your approach.

We have posted important information regarding the use of generative AI on the top page and at the end of the problem statement. Please make sure to read it.

We are looking forward to your participation!

We will hold AtCoder Beginner Contest 468.

• Contest URL: https://atcoder.jp/contests/abc468
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260725T2100&p1=248
• Duration: 100 minutes
• Writer: sounansya
• Tester: kyopro_friends, sheyasutaka
• Rated range: ~ 1999
• The point values: 100-200-300-400-450-500-550

We are looking forward to your participation!

We will hold AtCoder Regular Contest 225.

• Contest URL: https://atcoder.jp/contests/arc225
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260719T2100&p1=248
• Duration: 120 minutes
• Writer: milkcoffee
• Tester: Nyaan, maspy
• Rated range: 1200 ~ 2799
• Point Values: 500-600-600-600-900

We are looking forward to your participation!

We will hold AtCoder Heuristic Contest 068.

• Contest URL: https://atcoder.jp/contests/ahc068
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260718T1500&p1=248
• Duration: 4 hours
• Writer: wata_admin
• Rated range: All (Heuristic Rating)

AtCoder Heuristic Contest (AHC) is a series of programming contests held regularly on AtCoder. Unlike algorithm contests such as ABC/ARC/AGC, the goal is to create a better solution to a problem for which it is difficult to find the optimal solution.

This contest is one of the qualifying contests for AtCoder World Tour Finals 2027 to crown the world champion of AtCoder players.

After the contest ends, all participants can post their approach on the Editorial tab. Please share your approach.

This will be the final short contest to which the current generative AI rules apply. Starting with the next short contest, the new generative AI rules will take effect. We have also posted important information regarding the use of generative AI on the top page and at the end of the problem statement. Please make sure to read it.

We are looking forward to your participation!

We will hold AtCoder Beginner Contest 467.

• Contest URL: https://atcoder.jp/contests/abc467
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260718T2100&p1=248
• Duration: 100 minutes
• Writer: vwxyz0, Nyaan
• Tester: sheyasutaka, sounansya
• Rated range: ~ 1999
• The point values: 100-200-300-425-450-525-625

We are looking forward to your participation!

We will hold AtCoder Regular Contest-- 224.

• Contest URL: https://atcoder.jp/contests/arc224
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260712T2100&p1=248
• Duration: 120 minutes
• Writer: sheyasutaka, YoshikaMiyafuji, physics0523
• Tester: sheyasutaka, physics0523
• Rated range: 800 ~ 2399
• Point Values: 300-400-500-500-500-700

We are looking forward to your participation!

We will hold AtCoder Beginner Contest 466.

• Contest URL: https://atcoder.jp/contests/abc466
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260711T2100&p1=248
• Duration: 100 minutes
• Writer: math957963, cn449, sounansya
• Tester: kyopro_friends, harurun4635, sheyasutaka
• Rated range: ~ 1999
• The point values: 100-200-300-400-450-500-600

We are looking forward to your participation!

We will hold AtCoder Beginner Contest 465.

• Contest URL: https://atcoder.jp/contests/abc465
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260704T2100&p1=248
• Duration: 100 minutes
• Writer: sheyasutaka, sounansya
• Tester: MMNMM, KumaTachiRen
• Rated range: ~ 1999
• The point values: 100-200-300-400-450-525-625

We are looking forward to your participation!

We will hold AtCoder Regular Contest 223.

• Contest URL: https://atcoder.jp/contests/arc223
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260628T2100&p1=248
• Duration: 120 minutes
• Writer: vwxyz0
• Tester: Nyaan, maspy
• Rated range: 1200 ~ 2799
• Point Values: 400-500-500-600-700-800

We are looking forward to your participation!

We will hold Japanese Student Championship 2026 -Advance- Qualification (AtCoder Beginner Contest 464).

• Contest URL: https://atcoder.jp/contests/abc464
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260627T2100&p1=248
• Duration: 100 minutes
• Writer: harurun4635, physics0523, evima
• Tester: Nyaan, vwxyz0
• Rated range: ~ 1999
• The point values: 100-200-300-400-450-550-625

We are looking forward to your participation!

We will hold AtCoder Heuristic Contest 067.

• Contest URL: https://atcoder.jp/contests/ahc067
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260621T1900&p1=248
• Duration: 4 hours
• Writer: wata_admin
• Rated range: All (Heuristic Rating)

AtCoder Heuristic Contest (AHC) is a series of programming contests held regularly on AtCoder. Unlike algorithm contests such as ABC/ARC/AGC, the goal is to create a better solution to a problem for which it is difficult to find the optimal solution.

This contest is one of the qualifying contests for AtCoder World Tour Finals 2027 to crown the world champion of AtCoder players.

After the contest ends, all participants can post their approach on the Editorial tab. Please share your approach.

We are looking forward to your participation!

We will hold AtCoder Beginner Contest 463.

• Contest URL: https://atcoder.jp/contests/abc463
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260620T2100&p1=248
• Duration: 100 minutes
• Writer: KumaTachiRen, MMNMM
• Tester: math957963, cn449
• Rated range: ~ 1999
• The point values: 100-200-300-400-450-500-600

We are looking forward to your participation!

We will hold AtCoder Regular Contest 222.

• Contest URL: https://atcoder.jp/contests/arc222
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260614T2100&p1=248
• Duration: 120 minutes
• Writer: maspy
• Tester: Nyaan
• Rated range: 1200 ~ 2799
• Point Values: 300-500-700-700-700-700

We are looking forward to your participation!

We will hold CodeQUEEN 2026 -qual- (AtCoder Beginner Contest 462).

• Contest URL: https://atcoder.jp/contests/abc462
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260613T2100&p1=248
• Duration: 100 minutes
• Writer: sounansya, evima, math957963
• Tester: harurun4635, physics0523, sounansya
• Rated range: ~ 1999
• The point values: 100-200-300-400-450-500-575

We are looking forward to your participation!

We will hold AtCoder Beginner Contest 461.

• Contest URL: https://atcoder.jp/contests/abc461
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260606T2100&p1=248
• Duration: 100 minutes
• Writer: vwxyz0, evima, physics0523
• Tester: sounansya, physics0523, Nyaan
• Rated range: ~ 1999
• The point values: 100-200-300-425-475-500-625

We are looking forward to your participation!

We will hold AtCoder Regular Contest++ 221.

• Contest URL: https://atcoder.jp/contests/arc221
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260531T2100&p1=248
• Duration: 150 minutes
• Writer: tatyam, sounansya, toam, noya2, hirayuu_cf
• Rated range: 1600 — 2999
• Point Values: 600-800-800-800-1000

We are looking forward to your participation!