Competition
Codeforces Competitive Programming Rounds
Codeforces (ITMO University)
View detailsCompetition
AtCoder Beginner Contest (ABC)
Run by AtCoder Corporation
OnlineOnline (global), 100 minutes per contest; weekly cadenceFreeOpenLow effort
About this opportunity
cs, competition, Weekly online competitive programming contest with 8 problems of increasing difficulty, rated for participants with rating up to 1999. Held every Saturday evening Japan time (late evening Singapore time). An excellent stepping stone between LeetCode and full Codeforces rounds for intermediate learners.
Who can apply
Open to all ages globally; free account required; Singapore students can participate
What you get
Portfolio piece
Frequently asked
Who runs this?+
Run by AtCoder Corporation. More on their website.
Who can apply?+
Open to all ages globally; free account required; Singapore students can participate
Is it paid?+
Free to apply. No participant fees.
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View detailsUpdated 14 April 2026·Source