We, HACKARZ, are glad to invite you to participate in HACKARZ FOOLS CONTEST #4, which will take place on Jun/28/2025 18:00 (Moscow time). 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 Syria in the east.
We would like to thank FTS_Problem_C, benjellounelghali99, Magician_Mathematician, plankk, Metal_Sonic, Mohanad_Nahhal, NourWaelAli, Rayo 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.
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.
