Contest Page

CTFZone 2025 Quals

ctftime.org

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Start: 8/16/2025, 3:30:00 PM

End: 8/17/2025, 3:30:00 PM

Duration: 1 day

Impossible Mission Force Capture The Flag

ctftime.org

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Start: 7/5/2025, 12:30:00 PM

End: 7/7/2025, 1:30:00 AM

Duration: 1 day 13 hours

CubeCTF

ctftime.org

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Start: 7/5/2025, 3:46:00 AM

End: 7/7/2025, 5:55:00 AM

Duration: 2 days 2 hours

Problem 957

projecteuler.net

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Start: 8/2/2025, 9:30:00 PM

End: 8/2/2025, 9:30:00 PM

Duration: past

Индивидуальные тренировки 2025. День 2

contest.yandex.ru/CYF

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Start: 7/5/2025, 4:30:00 PM

End: 7/5/2025, 7:30:00 PM

Duration: 3 hours

DP Contest

naukri.com/code360

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Start: 10/13/2025, 1:30:00 PM

End: 10/13/2025, 1:30:00 PM

Duration: 2 years

CTF Cybercamp UMU 3.0

ctftime.org

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Start: 7/11/2025, 8:30:00 PM

End: 7/14/2025, 3:30:00 AM

Duration: 2 days 7 hours

BlitzCTF

ctftime.org

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Start: 7/5/2025, 8:00:00 PM

End: 7/7/2025, 8:00:00 AM

Duration: 1 day 12 hours

Cyber Arena

ctftime.org

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Start: 7/5/2025, 3:34:00 PM

End: 7/6/2025, 3:34:00 PM

Duration: 1 day

NNS CTF 2025

ctftime.org

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Start: 8/29/2025, 9:30:00 PM

End: 8/31/2025, 9:30:00 PM

Duration: 2 days

jailCTF 2025

ctftime.org

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Start: 8/16/2025, 1:30:00 AM

End: 8/19/2025, 1:30:00 AM

Duration: 3 days

SekaiCTF 2025

ctftime.org

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Start: 8/16/2025, 6:30:00 AM

End: 8/18/2025, 6:30:00 AM

Duration: 2 days

UIUCTF 2025

ctftime.org

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Start: 7/26/2025, 5:30:00 AM

End: 7/28/2025, 5:30:00 AM

Duration: 2 days

[FJCPC2025] 2025 年福建省大学生程序设计竞赛重现赛 [rated, icpc]

luogu.com.cn

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Start: 7/6/2025, 10:30:00 AM

End: 7/6/2025, 3:30:00 PM

Duration: 5 hours

Sawah Cyber Security CTF 2025

ctftime.org

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Start: 8/23/2025, 10:30:00 AM

End: 8/23/2025, 2:30:00 PM

Duration: 4 hours

Crypto CTF 2025

ctftime.org

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Start: 7/12/2025, 11:30:00 AM

End: 7/13/2025, 11:30:00 AM

Duration: 1 day

ARC Prize 2025 [artificial intelligence, custom metric]

kaggle.com

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Start: 3/26/2025, 10:29:00 PM

End: 11/4/2025, 5:29:00 AM

Duration: 31 weeks 5 days

Biweekly Contest 160

leetcode.com

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Start: 7/5/2025, 8:00:00 PM

End: 7/5/2025, 9:30:00 PM

Duration: 1 hour 30 minutes

UOJ NOI Round #9 笔试

uoj.ac

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Start: 7/6/2025, 4:30:00 PM

End: 7/6/2025, 5:00:00 PM

Duration: 30 minutes

Summer Challenge 2025

codingame.com

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Start: 7/17/2025, 6:30:00 PM

End: 7/28/2025, 1:30:00 PM

Duration: 1 week 4 days

The Algo Battles 2025 - Етап 4

algotester.com

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Start: 7/6/2025, 9:30:00 PM

End: 7/7/2025, 12:00:00 AM

Duration: 2 hours 30 minutes

Onsite Finals 2025

wincentdragonbyte.com

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Start: 9/12/2025, 7:30:00 AM

End: 9/15/2025, 7:30:00 AM

Duration: 4 hours

Online Round 2025

wincentdragonbyte.com

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Start: 7/12/2025, 7:30:00 PM

End: 7/12/2025, 10:30:00 PM

Duration: 3 hours

Equinor CTF 2025

ctftime.org

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Start: 11/8/2025, 2:30:00 PM

End: 11/9/2025, 12:30:00 AM

Duration: 10 hours

R3CTF 2025

ctftime.org

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Start: 7/5/2025, 7:30:00 AM

End: 7/7/2025, 7:30:00 AM

Duration: 2 days

Crate-CTF 2025

ctftime.org

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Start: 11/15/2025, 6:30:00 PM

End: 11/16/2025, 2:30:00 AM

Duration: 8 hours

Meta Kaggle Hackathon [tabular, text]

kaggle.com

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Start: 5/30/2025, 12:55:00 AM

End: 7/22/2025, 5:29:00 AM

Duration: 7 weeks 4 days

ENOWARS 9

ctftime.org

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Start: 7/19/2025, 5:30:00 PM

End: 7/20/2025, 2:30:00 AM

Duration: 9 hours

BrunnerCTF 2025

ctftime.org

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Start: 8/22/2025, 5:30:00 PM

End: 8/24/2025, 5:30:00 PM

Duration: 2 days

ToH CTF

ctftime.org

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Start: 7/19/2025, 9:30:00 PM

End: 7/20/2025, 9:30:00 PM

Duration: 1 day

Konwinski Prize [computer science, custom metric]

kaggle.com

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Start: 12/12/2025, 6:00:00 AM

End: 7/10/2025, 5:29:00 AM

Duration: 30 weeks

Выходи решать [design]. Биология

cups.online

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Start: 9/28/2025, 12:30:00 PM

End: 9/29/2025, 2:29:00 AM

Duration: 13 hours 59 minutes

AtCoder Heuristic Contest 050

atcoder.jp

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Start: 7/6/2025, 3:30:00 PM

End: 7/6/2025, 7:30:00 PM

Duration: 4 hours

ED2025S1

spoj.com

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Start: 2/12/2025, 5:30:00 AM

End: 7/12/2025, 5:30:00 AM

Duration: 21 weeks 3 days

ADS25S1

spoj.com

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Start: 2/12/2025, 5:30:00 AM

End: 7/13/2025, 5:30:00 AM

Duration: 21 weeks 4 days

Выходи решать [design]. Астрономия

cups.online

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Start: 9/28/2025, 12:30:00 PM

End: 9/29/2025, 2:29:00 AM

Duration: 13 hours 59 minutes

Shakti CTF 2025

ctftime.org

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Start: 7/25/2025, 6:00:00 PM

End: 7/26/2025, 6:00:00 PM

Duration: 1 day

EPIC Institute of Technology Round Summer 2025 (Codeforces Round 1036, Div. 1 + Div. 2)

codeforces.com

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Start: 7/6/2025, 8:05:00 PM

End: 7/6/2025, 11:05:00 PM

Duration: 3 hours

UOJ NOI Round #9 Day1

uoj.ac

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Start: 7/7/2025, 6:00:00 AM

End: 7/7/2025, 11:00:00 AM

Duration: 5 hours

Выходи решать [design]. Химия

cups.online

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Start: 9/28/2025, 12:30:00 PM

End: 9/29/2025, 2:29:00 AM

Duration: 13 hours 59 minutes

Russian Olympiad in Artificial Intelligence 2025 [ai]. Final round

cups.online

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Start: 11/17/2025, 11:30:00 AM

End: 11/22/2025, 2:29:00 AM

Duration: 4 days 15 hours

Problem 953

projecteuler.net

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Start: 7/6/2025, 9:30:00 AM

End: 7/6/2025, 9:30:00 AM

Duration: past

Problem 954

projecteuler.net

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Start: 7/13/2025, 12:30:00 PM

End: 7/13/2025, 12:30:00 PM

Duration: past

Problem 955

projecteuler.net

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Start: 7/20/2025, 3:30:00 PM

End: 7/20/2025, 3:30:00 PM

Duration: past

Problem 956

projecteuler.net

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Start: 7/26/2025, 6:30:00 PM

End: 7/26/2025, 6:30:00 PM

Duration: past

Denso Create Programming Contest 2025（AtCoder Beginner Contest 413）

atcoder.jp

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Start: 7/5/2025, 5:30:00 PM

End: 7/5/2025, 7:10:00 PM

Duration: 1 hour 40 minutes

Mirrativ Programming Contest 2025 (AtCoder Beginner Contest 414)

atcoder.jp

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Start: 7/12/2025, 5:30:00 PM

End: 7/12/2025, 7:10:00 PM

Duration: 1 hour 40 minutes

CodeRun Boost Challenge. CodeRun Boost Challenge

coderun.yandex.ru

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Start: 6/25/2025, 4:30:00 PM

End: 7/25/2025, 4:30:00 PM

Duration: 4 weeks 2 days

GaianSpace CTF 2025

ctftime.org

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Start: 11/14/2025, 7:30:00 PM

End: 11/17/2025, 7:30:00 PM

Duration: 3 days

【LGR-231-Div.3】洛谷基础赛 #24 & CZOI Round 4 [rated, ioi]

luogu.com.cn

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Start: 7/13/2025, 11:30:00 AM

End: 7/13/2025, 3:00:00 PM

Duration: 3 hours 30 minutes

CrewCTF 2025

ctftime.org

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Start: 9/20/2025, 2:30:00 AM

End: 9/22/2025, 2:30:00 AM

Duration: 2 days

WHY2025 CTF

ctftime.org

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Start: 8/8/2025, 9:30:00 PM

End: 8/11/2025, 9:30:00 PM

Duration: 3 days

DeadSec CTF 2025

ctftime.org

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Start: 7/26/2025, 3:30:00 AM

End: 7/28/2025, 3:30:00 AM

Duration: 2 days

EGOI (Germany)

usaco.org

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Start: 7/14/2025, 5:30:00 PM

End: 7/21/2025, 5:30:00 PM

Duration: 4 hours

corCTF 2025

ctftime.org

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Start: 8/30/2025, 5:30:00 AM

End: 9/1/2025, 5:30:00 AM

Duration: 2 days

RCTF 2025

ctftime.org

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Start: 8/20/2025, 3:30:00 PM

End: 8/22/2025, 3:30:00 PM

Duration: 2 days

idekCTF 2025

ctftime.org

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Start: 8/2/2025, 5:30:00 AM

End: 8/4/2025, 5:30:00 AM

Duration: 2 days

justCTF 2025 teaser

ctftime.org

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Start: 8/2/2025, 11:30:00 AM

End: 8/4/2025, 12:30:00 AM

Duration: 1 day 13 hours

PascalCTF Beginners 2026

ctftime.org

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Start: 1/31/2025, 1:30:00 PM

End: 2/1/2025, 1:30:00 PM

Duration: 1 day

UOJ NOI Round #9 Day2

uoj.ac

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Start: 7/8/2025, 6:00:00 AM

End: 7/8/2025, 11:00:00 AM

Duration: 5 hours

HITCON Cyber Range 2025 Quals

ctftime.org

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Start: 7/18/2025, 7:30:00 AM

End: 7/18/2025, 9:29:00 PM

Duration: 14 hours

KEPPY Birthday Contest | 4 years. Rated

kep.uz

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Start: 7/7/2025, 8:05:00 PM

End: 7/7/2025, 11:05:00 PM

Duration: 3 hours

Выходи решать [design]. Информатика

cups.online

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Start: 9/28/2025, 12:30:00 PM

End: 9/29/2025, 2:29:00 AM

Duration: 13 hours 59 minutes

L3HCTF 2025

ctftime.org

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Start: 7/12/2025, 6:30:00 AM

End: 7/14/2025, 6:30:00 AM

Duration: 2 days

No Hack No CTF 2025

ctftime.org

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Start: 7/5/2025, 1:30:00 PM

End: 7/7/2025, 1:30:00 PM

Duration: 2 days

ImaginaryCTF 2025

ctftime.org

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Start: 7/26/2025, 12:30:00 AM

End: 7/28/2025, 12:30:00 AM

Duration: 2 days

Platypwn 2025

ctftime.org

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Start: 11/15/2025, 2:30:00 PM

End: 11/17/2025, 2:30:00 AM

Duration: 1 day 12 hours

LINE CTF 2025

ctftime.org

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Start: 10/18/2025, 5:30:00 AM

End: 10/18/2025, 5:30:00 AM

Duration: past

TFC CTF 2025

ctftime.org

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Start: 8/29/2025, 3:30:00 PM

End: 8/31/2025, 3:30:00 PM

Duration: 2 days

Technocup 2025-2026 [sport_coding]. Introductory round

cups.online

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Start: 12/26/2025, 12:30:00 PM

End: 12/21/2025, 12:30:00 PM

Duration: 51 weeks 3 days

Codeforces Round (Div. 1 + Div. 2)

codeforces.com

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Start: 7/19/2025, 8:05:00 PM

End: 7/19/2025, 10:35:00 PM

Duration: 2 hours 30 minutes

Codeforces Round 1035 (Div. 2)

codeforces.com

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Start: 7/5/2025, 8:05:00 PM

End: 7/5/2025, 10:05:00 PM

Duration: 2 hours

Weekly Contest 459

leetcode.com

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Start: 7/20/2025, 8:00:00 AM

End: 7/20/2025, 9:30:00 AM

Duration: 1 hour 30 minutes

2026 SASI DeltaX Mock 2

naukri.com/code360

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Start: 7/5/2025, 10:00:00 AM

End: 7/5/2025, 11:00:00 PM

Duration: 13 hours

Выходи решать [design]. Физика

cups.online

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Start: 9/28/2025, 12:30:00 PM

End: 9/29/2025, 2:29:00 AM

Duration: 13 hours 59 minutes

Job-A-thon 46 Hiring Challenge

geeksforgeeks.org

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Start: 8/21/2025, 8:00:00 PM

End: 8/21/2025, 10:30:00 PM

Duration: 2 hours 30 minutes

TCP_Maratona

spoj.com

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Start: 6/7/2025, 5:30:00 AM

End: 1/1/2025, 5:30:00 AM

Duration: 3 years 30 weeks

DatsPulse

datsteam.dev

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Start: 7/11/2025, 9:30:00 PM

End: 7/12/2025, 10:30:00 PM

Duration: 1 day 1 hour

THIRD Programming Contest 2025 Summer（AtCoder Heuristic Contest 051）

atcoder.jp

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Start: 8/1/2025, 3:30:00 PM

End: 8/11/2025, 3:30:00 PM

Duration: 1 week 3 days

AtCoder Beginner Contest 419

atcoder.jp

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Start: 8/16/2025, 5:30:00 PM

End: 8/16/2025, 7:10:00 PM

Duration: 1 hour 40 minutes

QnQSec CTF 2025

ctftime.org

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Start: 10/16/2025, 11:30:00 PM

End: 10/19/2025, 11:30:00 PM

Duration: 3 days

World Tour Finals 2025 Heuristic

atcoder.jp

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Start: 7/16/2025, 5:30:00 AM

End: 7/16/2025, 3:30:00 PM

Duration: 10 hours

World Tour Finals 2025 Algorithm

atcoder.jp

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Start: 7/17/2025, 8:30:00 AM

End: 7/17/2025, 1:30:00 PM

Duration: 5 hours

World Tour Finals 2025 Algorithm（Open Contest）

atcoder.jp

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Start: 7/17/2025, 8:30:00 AM

End: 7/17/2025, 1:30:00 PM

Duration: 5 hours

Japan Registry Services (JPRS) Programming Contest 2025#2 (AtCoder Beginner Contest 415)

atcoder.jp

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Start: 7/19/2025, 5:30:00 PM

End: 7/19/2025, 7:10:00 PM

Duration: 1 hour 40 minutes

2026 SASI DeltaX Mock 1

naukri.com/code360

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Start: 7/4/2025, 10:00:00 AM

End: 7/4/2025, 11:00:00 PM

Duration: 13 hours

Replay of HSTU CSE FEST 2025

toph.co

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Start: 7/4/2025, 2:30:00 PM

End: 7/4/2025, 7:30:00 PM

Duration: 5 hours

牛客周赛 Round 100 [IOI]

ac.nowcoder.com

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Start: 7/13/2025, 4:30:00 PM

End: 7/13/2025, 6:30:00 PM

Duration: 2 hours

CodeRun Boost Challenge

coderun.yandex.ru

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Start: 6/25/2025, 4:30:00 PM

End: 7/25/2025, 4:30:00 PM

Duration: 4 weeks 2 days

Iran Tech Olympics CTF 2025

ctftime.org

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Start: 9/26/2025, 6:30:00 PM

End: 9/28/2025, 12:30:00 AM

Duration: 1 day 6 hours

Midnight Sun CTF 2026 Quals

ctftime.org

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Start: 4/11/2025, 3:30:00 PM

End: 4/12/2025, 3:30:00 PM

Duration: 1 day

WP CTF 2025

ctftime.org

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Start: 11/29/2025, 1:30:00 PM

End: 11/29/2025, 9:30:00 PM

Duration: 8 hours

MaltaCTF 2025 Finals

ctftime.org

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Start: 9/13/2025, 3:30:00 PM

End: 9/14/2025, 3:30:00 PM

Duration: 1 day

【LGR-232-Div.2】西安三三信奥 7 月月赛 I & WAOI R4, FeOI R3.5 [rated, ioi]

luogu.com.cn

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Start: 7/16/2025, 11:30:00 AM

End: 7/16/2025, 3:30:00 PM

Duration: 4 hours

HITCON CTF 2025

ctftime.org

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Start: 8/22/2025, 7:30:00 PM

End: 8/24/2025, 7:30:00 PM

Duration: 2 days

BDSec CTF 2025

ctftime.org

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Start: 7/20/2025, 8:30:00 PM

End: 7/21/2025, 8:30:00 PM

Duration: 1 day

scriptCTF 2025

ctftime.org

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Start: 8/16/2025, 5:30:00 AM

End: 8/18/2025, 5:30:00 AM

Duration: 2 days

SAS CTF 2025 Finals

ctftime.org

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Start: 10/26/2025, 8:30:00 AM

End: 10/26/2025, 7:30:00 PM

Duration: 11 hours

HITCON Cyber Range 2025 Final

ctftime.org

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Start: 10/17/2025, 6:30:00 AM

End: 10/17/2025, 3:30:00 PM

Duration: 9 hours

Буткемп по подготовке к ML-соревнованиям «Вектор ИИ». Вектор ИИ. Модуль Junior

cups.online

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Start: 6/20/2025, 2:30:00 PM

End: 7/14/2025, 2:29:00 AM

Duration: 3 weeks 2 days