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!

We will hold AtCoder Beginner Contest 460.

• Contest URL: https://atcoder.jp/contests/abc460
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260530T2100&p1=248
• Duration: 100 minutes
• Writer: cn449, Nyaan, vwxyz0
• Tester: sheyasutaka, MMNMM
• Rated range: ~ 1999
• The point values: 100-250-300-425-450-550-650

We are looking forward to your participation!

We will hold Tokio Marine & Nichido Fire Insurance Programming Contest 2026 (AtCoder Beginner Contest 459).

• Contest URL: https://atcoder.jp/contests/abc459
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260523T2100&p1=248
• Duration: 100 minutes
• Writer: sounansya, math957963, YoshikaMiyafuji
• Tester: kyopro_friends, harurun4635
• Rated range: ~ 1999
• The point values: 100-200-300-400-450-525-625

We are looking forward to your participation!

We will hold AtCoder Heuristic Contest 065.

• Contest URL: https://atcoder.jp/contests/ahc065
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260516T1500&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 Regular Contest++ 220.

• Contest URL: https://atcoder.jp/contests/arc220
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260517T2100&p1=248
• Duration: 150 minutes
• Writer: sounansya
• Tester: Nyaan, maspy
• Rated range: 1600 ~ 2999
• Point Values: 600-800-800-800-1000

We are looking forward to your participation!

We will hold AtCoder Beginner Contest 458.

• Contest URL: https://atcoder.jp/contests/abc458
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260516T2100&p1=248
• Duration: 100 minutes
• Writer: physics0523, sheyasutaka, sounansya
• Tester: Nyaan, KumaTachiRen, harurun4635
• 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-- 219.

• Contest URL: https://atcoder.jp/contests/arc219
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260510T2100&p1=248
• Duration: 120 minutes
• Writer: sheyasutaka, sounansya, kyopro_friends
• Tester: sheyasutaka, sounansya
• Rated range: 800 ~ 2399
• Point Values: 400-400-500-500-600-600-700

We are looking forward to your participation!

We will hold Polaris.AI Programming Contest 2026（AtCoder Beginner Contest 457）.

• Contest URL: https://atcoder.jp/contests/abc457
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260509T2100&p1=248
• Duration: 100 minutes
• Writer: sounansya, harurun4635, vwxyz0
• Tester: vwxyz0, cn449
• Rated range: ~ 1999
• The point values: 100-200-300-400-475-525-625

We are looking forward to your participation!

We will hold AtCoder Regular Contest 218.

• Contest URL: https://atcoder.jp/contests/arc218
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260503T2100&p1=248
• Duration: 120 minutes
• Writer: PCTprobability
• Tester: Nyaan, maspy
• Rated range: 1200 ~ 2799
• Point Values: 400-400-600-700-800-1000(700+300)

We are looking forward to your participation!

We will hold AtCoder Beginner Contest 456.

• Contest URL: https://atcoder.jp/contests/abc456
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260502T2100&p1=248
• Duration: 100 minutes
• Writer: kyopro_friends, KumaTachiRen
• Tester: math957963, sounansya
• Rated range: ~ 1999
• The point values: 100-200-300-400-450-525-600

We are looking forward to your participation!

We will hold JR WEST and ALGO ARTIS Programming Contest (AtCoder Heuristic Contest 064).

• Contest URL: https://atcoder.jp/contests/ahc064
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260426T1500&p1=248
• Duration: 4 hours
• Writer: ryomac1, Jirotech, yochan, yunix
• 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 Ｓｋｙ Inc, Programming Contest 2026 (AtCoder Beginner Contest 455).

• Contest URL: https://atcoder.jp/contests/abc455
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260425T2100&p1=248
• Duration: 100 minutes
• Writer: cn449, vwxyz0, sheyasutaka
• Tester: MMNMM, physics0523
• Rated range: ~ 1999
• The point values: 100-200-300-400-450-525-625

We are looking forward to your participation!

We will hold Keysight Technologies Programming Contest（AtCoder Beginner Contest 454）.

• Contest URL: https://atcoder.jp/contests/abc454
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260418T2100&p1=248
• Duration: 100 minutes
• Writer: sounansya, Nyaan
• Tester: sheyasutaka, harurun4635
• Rated range: ~ 1999
• The point values: 100-200-300-425-450-525-625

We are looking forward to your participation!

We will hold AtCoder Beginner Contest 453.

• Contest URL: https://atcoder.jp/contests/abc453
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260411T2100&p1=248
• Duration: 100 minutes
• Writer: physics0523, math957963, KumaTachiRen, kyopro_friends, blackyuki
• Tester: kyopro_friends, KumaTachiRen
• Rated range: ~ 1999
• The point values: 100-200-300-425-475-550-600

We are looking forward to your participation!

We will hold AtCoder Regular Contest 217.

• Contest URL: https://atcoder.jp/contests/arc217
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260405T2100&p1=248
• Duration: 120 minutes
• Writer: nok0, sounansya
• Tester: maspy
• Rated range: 1200 ~ 2799
• Point Values: 500-700-700-700-900

We are looking forward to your participation!

We will hold AtCoder Beginner Contest 452.

• Contest URL: https://atcoder.jp/contests/abc452
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260404T2100&p1=248
• Duration: 100 minutes
• Writer: sheyasutaka, MMNMM, blackyuki
• Tester: vwxyz0, Nyaan
• 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 063.

• Contest URL: https://atcoder.jp/contests/ahc063
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260403T1900&p1=248
• Duration: 10 days
• 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 451.

• Contest URL: https://atcoder.jp/contests/abc451
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260328T2100&p1=248
• Duration: 100 minutes
• Writer: KumaTachiRen, harurun4635, toam
• Tester: cn449, sounansya
• Rated range: ~ 1999
• The point values: 100-200-300-400-475-500-600

We are looking forward to your participation!

We will hold AtCoder Regular Contest++ 216.

• Contest URL: https://atcoder.jp/contests/arc216
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260322T2100&p1=248
• Duration: 150 minutes
• Writer: toam
• Tester: Nyaan, tatyam
• Rated range: 1600 ~ 2999
• Point Values: 700-700-800-1000-1000

We are looking forward to your participation!

We will hold AtCoder Beginner Contest 450.

• Contest URL: https://atcoder.jp/contests/abc450
• Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260321T2100&p1=248
• Duration: 100 minutes
• Writer: vwxyz0, kyopro_friends, toam, nok0
• Tester: MMNMM, physics0523
• Rated range: ~ 1999
• The point values: 100-200-300-400-450-525-575

We are looking forward to your participation!