We want to mention [user:BamiTorabi,2020-11-18] and [user:amoo_safar,2020-11-18] who we thank for helping us with translating the problems and writing the tutorials.and we want to apologize for div1 A2 and B hopefully you will forgive us :( .↵
[tutorial:1440A]↵
Prepared by [user:Mohammad.H915,2020-11-18]↵
[tutorial:1440B]↵
Prepared by [user:Mohammad.H915,2020-11-18]↵
[tutorial:1439A2]↵
Prepared by [user:Mohammad.H915,2020-11-18]↵
[tutorial:1439B]↵
Prepared by [user:Alishahali1382,2020-11-18]↵
[tutorial:1439C]↵
prepared by [user:Mehrdad_sohrabi,2020-11-18]↵
[tutorial:1439D]↵
prepared by [user:Mehrdad_sohrabi,2020-11-18]↵
[tutorial:1439E]↵
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[tutorial:1440A]↵
Prepared by [user:Mohammad.H915,2020-11-18]↵
[tutorial:1440B]↵
Prepared by [user:Mohammad.H915,2020-11-18]↵
[tutorial:1439A2]↵
Prepared by [user:Mohammad.H915,2020-11-18]↵
[tutorial:1439B]↵
Prepared by [user:Alishahali1382,2020-11-18]↵
[tutorial:1439C]↵
prepared by [user:Mehrdad_sohrabi,2020-11-18]↵
[tutorial:1439D]↵
prepared by [user:Mehrdad_sohrabi,2020-11-18]↵
[tutorial:1439E]↵
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