We, HACKARZ, are glad to invite you to participate in HFC #4, which will take place on 28.06.2025 18:00 (Московское время). You will be given 8 problems and 2 hours to solve them. The problems ARE NOT SORTED ACCORDING TO DIFFICULTY so please read the full problem set.

The problems were authored & prepared by: Ahmed_Salamaa, .Habiba., MohammadAbduljalil, ahmedfouadnew, Youssef_Elwazzan, Hamed5001, and the coordinator, me (Since Ahmadsm2005 is busy).

We had testers from all over the Arab region, from Morocco in the west to Palestine & Syria in the east.

We would like to thank FTS_Problem_C, benjellounelghali99, Magician_Mathematician, plankk, Metal_Sonic, Mohanad_Nahhal, NourWaelAli, Rayo, and Wawi for testing.

Special thanks to yahia, who tested and played a big role in the contest preparation to make it better.

We would like to thank our media team for their efforts — especially the leader enfp, who did a great job.

We would like to thank Maqed for his technical support in the custom standings.

Join the group: https://mirror.codeforces.com/group/zJtqriSgdw/contests.

IMPORTANT NOTES:

• Solving some problems may depend on reading others.
• Searching for anything is allowed during the contest, but using AI like ChatGPT is not allowed.

We're glad to invite you to participate in HACKARZ FOOLS CONTEST #3, which will take place on Nov/28/2024 17:35 (Moscow time). You will be given 10 problems and 3 hours to solve them. The problems ARE NOT SORTED ACCORDING TO DIFFICULTY so please read all problems.

The problems were authored and prepared by: Baraa-Ahmed, ahmedfouadnew, MN3M, enfp, .Habiba., and our beloved coordinator Ahmadsm2005.

We would like to thank yahia, Youssef_Elwazzan, d19n, and Metal_Sonic for testing.

We would like to thank our media team for their beautiful work: enfp, Elaine151, and hAneeNn.

We hope you'll like the problems and enjoy the contest!

Join the group: https://mirror.codeforces.com/group/zJtqriSgdw/contests.

IMPORTANT NOTES:

• Solving some problems may depend on reading others.
• Searching for anything is allowed during the contest, but using AI like ChatGPT is not allowed.

Trailer: https://mirror.codeforces.com/blog/entry/126176 .

We're glad to invite you to participate in HACKARZ FOOLS CONTEST #2, which will take place on Feb/29/2024 21:00 (Moscow time). You will be given 10 problems and 2 hours to solve them. The problems ARE NOT SORTED ACCORDING TO DIFFICULTY so please read all problems.

The problems were authored and prepared by: MN3M, .Habiba., enfp, ahmedfouadnew, and our beloved coordinator Ahmadsm2005.

We would like to thank yahia, Octagons, and Shahdd for testing.

We would like to thank our media team for their beautiful work: DefaultDiva and enfp.

We hope you'll like the problems and enjoy the contest!

Join group: https://mirror.codeforces.com/group/zJtqriSgdw/contests .

IMPORTANT NOTES:

• Solving some problems may depend on reading others.
• Searching for anything is allowed during the contest.

My skeleton life is nothing similar to my human life. I now get to sit and enjoy my farm and my cows. I can't say I hate my new life, but I definitely miss my friends and the memories we had together. Wanna know more?

https://mirror.codeforces.com/group/zJtqriSgdw/blog