We will hold AtCoder Regular Contest 193 (Div. 1).

• Contest URL: https://atcoder.jp/contests/arc193
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20250223T2100&p1=248
• Duration: 150 minutes
• Number of Tasks: 5
• Writer: leaf1415
• Tester: Nyaan, maspy
• Rated range: 1600 ~ 2799

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

We are looking forward to your participation!

We will hold AtCoder Beginner Contest 393.

• Contest URL: https://atcoder.jp/contests/abc393
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20250215T2100&p1=248
• Duration: 100 minutes
• Writer: Nyaan, yuto1115, ynymxiaolongbao
• Tester: MtSaka, sounansya
• Rated range: ~ 1999
• The point values: 100-200-300-425-475-500-675

We are looking forward to your participation!

We will hold RECRUIT Nihonbashi Half Marathon 2025 Winter（AtCoder Heuristic Contest 043）.

• Contest URL: https://atcoder.jp/contests/ahc043
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20250214T1900&p1=248
• Duration: 10 days
• Staff: cozy_sauna, dpforest, eha, FLOPPY_30, frnfnts, hamray, hashiryo, japlj, kanra824, kys, n_knuu, roiti, samasama, shichinomiya, shiratty8, smiken, sugim48, suzume, tomerun, yupiteru, yusk
• 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 2026 to crown the world champion of AtCoder players. Please refer to this post for more details.

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 Regular Contest 192 (Div. 2).

• Contest URL: https://atcoder.jp/contests/arc192
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20250209T2100&p1=248
• Duration: 120 minutes
• Number of Tasks: 5
• Writer: hirayuu_cf
• Tester: Nyaan, maspy
• Rated range: 1200 ~ 2399

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

We are looking forward to your participation!

We will hold Japan Registry Services (JPRS) Programming Contest 2025#1 (AtCoder Beginner Contest 392).

• Contest URL: https://atcoder.jp/contests/abc392
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20250208T2100&p1=248
• Duration: 100 minutes
• Writer: physics0523, kyopro_friends, ynymxiaolongbao
• Tester: nok0, MMNMM
• Rated range: ~ 1999
• The point values: 100-200-300-400-450-500-600

We are looking forward to your participation!

We will hold AtCoder Heuristic Contest 042.

• Contest URL: https://atcoder.jp/contests/ahc042
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20250202T1900&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 2026 to crown the world champion of AtCoder players. Please refer to this post for more details.

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 391.

• Contest URL: https://atcoder.jp/contests/abc391
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20250201T2100&p1=248
• Duration: 100 minutes
• Writer: sotanishy, toam, physics0523
• 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 Beginner Contest 390.

• Contest URL: https://atcoder.jp/contests/abc390
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20250125T2100&p1=248
• Duration: 100 minutes
• Writer: math957963, sounansya
• Tester: Nyaan, yuto1115
• Rated range: ~ 1999
• The point values: 150-200-300-400-450-525-600

We are looking forward to your participation!

We will hold AtCoder Regular Contest 191 (Div. 2).

• Contest URL: https://atcoder.jp/contests/arc191
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20250126T2100&p1=248
• Duration: 120 minutes
• Number of Tasks: 5
• Writer: sounansya
• Tester: Nyaan, maspy
• Rated range: 1200 ~ 2399

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

We are looking forward to your participation!

We will hold ALGO ARTIS Programming Contest 2025 Winter（AtCoder Heuristic Contest 041）.

• Contest URL: https://atcoder.jp/contests/ahc041
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20250119T1500&p1=248
• Duration: 4 hours
• Writer: terry_u16
• 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 2026 to crown the world champion of AtCoder players. Please refer to this post for more details.

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 Toyota Programming Contest 2025（AtCoder Beginner Contest 389).

• Contest URL: https://atcoder.jp/contests/abc389
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20250118T2100&p1=248
• Duration: 100 minutes
• Writer: nok0, MtSaka, evima
• Tester: physics0523, kyopro_friends
• Rated range: ~ 1999
• The point values: 100-150-300-400-475-525-600

We are looking forward to your participation!

We will hold AtCoder Regular Contest 190 (Div. 1).

• Contest URL: https://atcoder.jp/contests/arc190
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20250112T2100&p1=248
• Duration: 120 minutes
• Number of Tasks: 5
• Writer: maspy
• Tester: Nyaan
• Rated range: 1600 ~ 2799

The point values will be 700-800-800-900-1100.

We are looking forward to your participation!

We will hold HHKB Programming Contest 2025(AtCoder Beginner Contest 388).

• Contest URL: https://atcoder.jp/contests/abc388
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20250111T2100&p1=248
• Duration: 100 minutes
• Writer: MMNMM, cn449, physics0523
• Tester: sotanishy, toam
• Rated range: ~ 1999
• The point values: 100-200-300-400-450-550-575

We are looking forward to your participation!

We will hold AtCoder Beginner Contest 387.

• Contest URL: https://atcoder.jp/contests/abc387
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20250104T2100&p1=248
• Duration: 100 minutes
• Writer: Nyaan, yuto1115
• Tester: MtSaka, sounansya
• Rated range: ~ 1999
• The point values: 100-150-350-400-500-550-675

We are looking forward to your participation!

We will hold AtCoder Beginner Contest 386.

• Contest URL: https://atcoder.jp/contests/abc386
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20241228T2100&p1=248
• Duration: 100 minutes
• Writer: physics0523, toam
• Tester: MMNMM, nok0
• Rated range: ~ 1999
• The point values: 100-200-350-425-500-525-600

We are looking forward to your participation!

We will hold UNIQUE VISION Programming Contest 2024 Christmas (AtCoder Beginner Contest 385).

• Contest URL: https://atcoder.jp/contests/abc385
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20241221T2100&p1=248
• Duration: 100 minutes
• Writer: sotanishy, kyopro_friends, physics0523, blackyuki
• Tester: yuto1115, cn449
• Rated range: ~ 1999
• The point values: 100-200-350-425-450-525-600

We are looking forward to your participation!

We will hold Toyota Programming Contest 2024#12（AtCoder Beginner Contest 384）.

• Contest URL: https://atcoder.jp/contests/abc384
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20241214T2100&p1=248
• Duration: 100 minutes
• Writer: MMNMM, sounansya, physics0523
• Tester: Nyaan, math957963
• Rated range: ~ 1999
• The point values: 100-200-300-400-450-500-575

We are looking forward to your participation!

We will hold AtCoder Regular Contest 189 (Div. 2).

• Contest URL: https://atcoder.jp/contests/arc189
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20241208T2100&p1=248
• Duration: 120 minutes
• Number of Tasks: 5
• Writer: leaf1415, math957963, PCTprobability
• Tester: Nyaan
• Rated range: 1200 ~ 2399

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

We are looking forward to your participation!

We will hold Daiwa Securities Co. Ltd. Programming Contest 2024（AtCoder Beginner Contest 383）.

• Contest URL: https://atcoder.jp/contests/abc383
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20241207T2100&p1=248
• Duration: 100 minutes
• Writer: MtSaka, nok0, evima
• Tester: physics0523, kyopro_friends
• Rated range: ~ 1999
• The point values: 150-250-350-400-500-525-625

We are looking forward to your participation!

We will hold AtCoder Beginner Contest 382.

• Contest URL: https://atcoder.jp/contests/abc382
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20241130T2100&p1=248
• Duration: 100 minutes
• Writer: yuto1115, cn449, evima
• Tester: sotanishy, toam
• Rated range: ~ 1999
• The point values: 100-200-350-425-475-525-575

We will hold HACK TO THE FUTURE 2025 (AtCoder Heuristic Contest 040).

• Contest URL: https://atcoder.jp/contests/ahc040
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20241129T1900&p1=248
• Duration: 10 days
• Writer: wata_admin
• Staff: tsukammo platinum ppputtyo syunsuke kudryavka_chan riantkb kickty
• 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. We will hold a long-term contest with a duration of more than a week and a short-term contest with a duration of less than a day, roughly alternately about once a month.

This is the last qualifying contest for AtCoder World Tour Finals 2025 to crown the world champion of AtCoder players. Please refer to this post for more details.

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 estie Programming Contest 2024 (AtCoder Regular Contest 188).

• Contest URL: https://atcoder.jp/contests/arc188
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20241123T2100&p1=248
• Duration: 120 minutes
• Number of Tasks: 5
• Writer: riano_
• Tester: Nyaan, maspy
• Rated range: 1200 ~ 2799

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

We are looking forward to your participation!

We will hold AtCoder Beginner Contest 381.

• Contest URL: https://atcoder.jp/contests/abc381
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20241122T2100&p1=248
• Duration: 100 minutes
• Writer: Nyaan, math957963, PCTprobability
• Tester: MtSaka, sounansya
• Rated range: ~ 1999
• The point values: 150-150-300-425-500-525-675

We are looking forward to your participation!

We will hold AtCoder Regular Contest 187.

• Contest URL: https://atcoder.jp/contests/arc187
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20241117T2100&p1=248
• Duration: 120 minutes
• Number of Tasks: 5
• Writer: nok0
• Tester: Nyaan, maspy
• Rated range: 1200 ~ 2799

The point values will be 600-600-800-900-1000.

Please note that the new generative AI rules will be applied for also ARC from this ARC.

We are looking forward to your participation!

We will hold AtCoder Beginner Contest 380.

• Contest URL: https://atcoder.jp/contests/abc380
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20241116T2100&p1=248
• Duration: 100 minutes
• Writer: physics0523, kyopro_friends
• Tester: MMNMM, nok0
• Rated range: ~ 1999
• The point values: 100-200-300-350-450-500-575

Please note that new generative AI rules will be applied from this ABC.

We are looking forward to your participation!