| CF803D | CF803D Magazine Ad |
| CF803E | CF803E Roma and Poker |
| CF803F | CF803F Coprime Subsequences |
| CF804D | CF804D Expected diameter of a tree |
| CF804E | CF804E The same permutation |
| CF808F | CF808F Card Game |
| CF808G | CF808G Anthem of Berland |
| CF809C | CF809C Find a car |
| CF809E | CF809E Surprise me! |
| CF813D | CF813D Two Melodies |
| CF813F | CF813F Bipartite Checking |
| CF817D | CF817D Imbalanced Array |
| CF817F | CF817F MEX Queries |
| CF818E | CF818E Card Game Again |
| CF818F | CF818F Level Generation |
| CF822E | CF822E Liar |
| CF825E | CF825E Minimal Labels |
| CF825F | CF825F String Compression |
| CF825G | CF825G Tree Queries |
| CF827D | CF827D Best Edge Weight |
| CF827E | CF827E Rusty String |
| CF830D | CF830D Singer House |
| CF833B | CF833B The Bakery |
| CF837D | CF837D Round Subset |
| CF837E | CF837E Vasya's Function |
| CF837G | CF837G Functions On The Segments |
| CF838D | CF838D Airplane Arrangements |
| CF839D | CF839D Winter is here |
| CF839E | CF839E Mother of Dragons |
| CF840C | CF840C On the Bench |
| CF840D | CF840D Destiny |
| CF843D | CF843D Dynamic Shortest Path |
| CF845D | CF845D Driving Test |
| CF845E | CF845E Fire in the City |
| CF845G | CF845G Shortest Path Problem? |
| CF846D | CF846D Monitor |
| CF846E | CF846E Chemistry in Berland |
| CF846F | CF846F Random Query |
| CF848B | CF848B Rooter's Song |
| CF848C | CF848C Goodbye Souvenir |
| CF848D | CF848D Shake It! |
| CF848E | CF848E Days of Floral Colours |
| CF850C | CF850C Arpa and a game with Mojtaba |
| CF850F | CF850F Rainbow Balls |
| CF855C | CF855C Helga Hufflepuff's Cup |
| CF855F | CF855F Nagini |
| CF85D | CF85D Sum of Medians |
| CF85E | CF85E Guard Towers |
| CF863C | CF863C 1-2-3 |
| CF863E | CF863E Turn Off The TV |
| CF863F | CF863F Almost Permutation |
| CF864F | CF864F Cities Excursions |
| CF865D | CF865D Buy Low Sell High |
| CF868F | CF868F Yet Another Minimization Problem |
| CF869C | CF869C The Intriguing Obsession |
| CF86C | CF86C Genetic engineering |
| CF86D | CF86D Powerful array |
| CF870F | CF870F Paths |
| CF873D | CF873D Merge Sort |
| CF873E | CF873E Awards For Contestants |
| CF873F | CF873F Forbidden Indices |
| CF875F | CF875F Royal Questions |
| CF877E | CF877E Danil and a Part-time Job |
| CF878A | CF878A Short Program |
| CF878B | CF878B Teams Formation |
| CF878C | CF878C Tournament |
| CF878D | CF878D Magic Breeding |
| CF87C | CF87C Interesting Game |
| CF884D | CF884D Boxes And Balls |
| CF884F | CF884F Anti-Palindromize |
| CF886E | CF886E Maximum Element |
| CF888E | CF888E Maximum Subsequence |
| CF888F | CF888F Connecting Vertices |
| CF888G | CF888G Xor-MST |
| CF891B | CF891B Gluttony |
| CF891C | CF891C Envy |
| CF891E | CF891E Lust |
| CF893D | CF893D Credit Card |
| CF893E | CF893E Counting Arrays |
| CF893F | CF893F Subtree Minimum Query |
| CF895C | CF895C Square Subsets |
| CF896C | CF896C Willem, Chtholly and Seniorious |
| CF896E | CF896E Welcome home, Chtholly |
| CF8C | CF8C Looking for Order |
| CF8E | CF8E Beads |
| CF900D | CF900D Unusual Sequences |
| CF903D | CF903D Almost Difference |
| CF903E | CF903E Swapping Characters |
| CF903G | CF903G Yet Another Maxflow Problem |
| CF906C | CF906C Party |
| CF906D | CF906D Power Tower |
| CF908G | CF908G New Year and Original Order |
| CF911D | CF911D Inversion Counting |
| CF911E | CF911E Stack Sorting |
| CF911F | CF911F Tree Destruction |
| CF912D | CF912D Fishes |
| CF913F | CF913F Strongly Connected Tournament |
| CF913G | CF913G Power Substring |
| CF913H | CF913H Don't Exceed |
| CF914E | CF914E Palindromes in a Tree |
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