CCO '25 and CIW '25 Problems Posted

Kirito, maxcruickshanks, BalintR posted on May 31, 2025, 2:11 p.m.

All problems from this year's CCO and CIW have been added. You may access them here and here, respectively.

Unofficial mirrors for CCO day 1, CCO day 2, CIW day 1, and CIW day 2 have also been set up.

The problem data were uploaded by BalintR, the problem statements were uploaded by Kirito, and the mirrors were made by maxcruickshanks.

An unofficial scoreboard for CCO is accessible here compiled by AustinJiang.

Finally, congratulations to littlecat, skittles1412, Alex Lin, and Tarek Ahmed, who will be representing Canada at the IOI!

Comments


  • 0
    liympanda  commented on June 11, 2025, 10:06 p.m.

    Sorry for the stupid question, any background story about CIW?

    I tried CIW day 1 and it seems it's sharing the easiest problem from CCO day1.

    Thanks.


    • 2
      Kirito  commented on June 11, 2025, 10:37 p.m.

      CIW is the 2nd round selection contest for Canada's EGOI team; as you've noticed, P3 and P6 of CIW (this year, at least) are CCO P1 and P4, respectively.