We will hold AtCoder Regular Contest 196 (Div. 1).

• Contest URL: https://atcoder.jp/contests/arc196
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20250406T2100&p1=248
• Duration: 150 minutes
• Number of Tasks: 4
• Writer: blackyuki
• Tester: Nyaan, maspy
• Rated range: 1600 ~ 2999

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

We are looking forward to your participation!

We will hold AtCoder Beginner Contest 399.

• Contest URL: https://atcoder.jp/contests/abc399
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20250329T2100&p1=248
• Duration: 100 minutes
• Writer: Nyaan, yuto1115, ynymxiaolongbao
• Tester: MtSaka, sounansya
• Rated range: ~ 1999
• The point values: 100-200-350-400-500-550-675

We are looking forward to your participation!

We will hold THIRD PROGRAMMING CONTEST 2025（AtCoder Heuristic Contest 045）.

• Contest URL: https://atcoder.jp/contests/ahc045
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20250328T1900&p1=248
• Duration: 10 days
• Writer: Shun_PI
• 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 195 (Div. 2).

• Contest URL: https://atcoder.jp/contests/arc195
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20250323T2100&p1=248
• Duration: 120 minutes
• Number of Tasks: 5
• Writer: tokusakurai
• Tester: Nyaan, maspy
• Rated range: 1200 ~ 2399

The point values will be 400-500-600-700-900.

We are looking forward to your participation!

We will hold UNIQUE VISION Programming Contest 2025 Spring (AtCoder Beginner Contest 398).

• Contest URL: https://atcoder.jp/contests/abc398
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20250322T2100&p1=248
• Duration: 100 minutes
• Writer: physics0523, kyopro_friends, tatyam
• Tester: nok0, MMNMM
• Rated range: ~ 1999
• The point values: 100-250-300-425-425-500-600

We are looking forward to your participation!

Starting from ARC196, the upper rated limit for ARC Div.1 will change from 2799 to 2999.

ARC Div.1 is currently in an experimental phase, and we appreciate your understanding as frequent changes may occur.

As of ARC196, the competition format for ARC Div.1 is as follows:

• Rated range : 1600-2999
• Performance cap : 3400
• Contest duration : 150 minutes
• Number of tasks : 4 or 5

We will hold AtCoder Heuristic Contest 044.

• Contest URL: https://atcoder.jp/contests/ahc044
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20250316T1900&p1=248
• Duration: 4 hours
• Writer: square1001, E869120
• 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 OMRON Corporation Programming Contest 2025 (AtCoder Beginner Contest 397).

• Contest URL: https://atcoder.jp/contests/abc397
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20250315T2100&p1=248
• Duration: 100 minutes
• Writer: sotanishy, MtSaka, sounansya, kyopro_friends, blackyuki
• Tester: math957963, cn449
• Rated range: ~ 1999
• The point values: 100-250-350-425-475-550-625

We are looking forward to your participation!

We will hold AtCoder Regular Contest 194 (Div. 2).

• Contest URL: https://atcoder.jp/contests/arc194
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20250309T2100&p1=248
• Duration: 120 minutes
• Number of Tasks: 5
• Writer: leaf1415, math957963, PCTprobability
• Tester: Nyaan
• Rated range: 1200 ~ 2399

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

We are looking forward to your participation!

We will hold AtCoder Beginner Contest 396.

• Contest URL: https://atcoder.jp/contests/abc396
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20250308T2100&p1=248
• Duration: 100 minutes
• Writer: toam, sounansya
• Tester: physics0523, yuto1115
• 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 395.

• Contest URL: https://atcoder.jp/contests/abc395
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20250301T2100&p1=248
• Duration: 100 minutes
• Writer: hirayuu_cf, MMNMM, ynymxiaolongbao
• Tester: Nyaan, kyopro_friends
• Rated range: ~ 1999
• The point values: 100-200-300-350-425-500-625

We are looking forward to your participation!

We will hold KAJIMA CORPORATION CONTEST 2025 (AtCoder Beginner Contest 394).

• Contest URL: https://atcoder.jp/contests/abc394
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20250222T2100&p1=248
• Duration: 100 minutes
• Writer: math957963, cn449
• Tester: sotanishy, toam
• 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 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: 4
• Writer: leaf1415
• Tester: Nyaan, maspy
• Rated range: 1600 ~ 2799

The point values will be 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!