Index Problem Difficulty Solved 1 Cards 600 2 Between the Offices 600 3 Mahmoud and Ehab and the even-odd game 600 4 Fafa and his Company 600 5 Vus the Cossack and a Contest 600 6 Scarborough Fair 700 7 Tokitsukaze and Enhancement 700 8 Pens and Pencils 700 9 Infinity Gauntlet 700 10 Petya and Origami 700 11 The Rank 700 12 Nastya Is Reading a Book 700 13 Fingerprints 700 14 Game 700 15 Choose Two Numbers 800 16 Ehab and another construction problem 800 17 Olympiad 800 18 Alex and a Rhombus 800 19 Maximum Square 800 20 Rounding 800 21 Angry Students 800 22 A pile of stones 800 23 Neko Finds Grapes 800 24 Eleven 800 25 Find Square 800 26 QAQ 800 27 Little C Loves 3 I 800 28 Sasha and Sticks 800 29 Equation 800 30 Keanu Reeves 800 31 Equality 800 32 Changing Volume 800 33 Friends Meeting 800 34 Love Triangle 800 35 Arpa and a research in Mexican wave 800 36 Stones 800 37 Compote 800 38 Coins 800 39 Left-handers, Right-handers and Ambidexters 900 40 Be Positive 900 41 Sasha and His Trip 900 42 Ropewalkers 900 43 Sonya and Hotels 900 44 Sushi for Two 900 45 Paint the Numbers 900 46 XORinacci 900 47 Snowball 900 48 Integer Points 900 49 Neverending competitions 900 50 A Serial Killer 900 51 Important Exam 900 52 The King's Race 900 53 Greed 900 54 Buying A House 900 55 Oath of the Night's Watch 1000 56 A Blend of Springtime 1000 57 Roman and Browser 1000 58 Protect Sheep 1000 59 Ehab Fails to Be Thanos 1000 60 Fake NP 1000 61 Stages 1000 62 Circle Metro 1000 63 Eating Soup 1000 64 Palindrome Dance 1000 65 Trip For Meal 1000 66 The Useless Toy 1000 67 Aramic script 1000 68 Diversity 1000 69 Beautiful String 1000 70 Single Push 1000 71 Anastasia and pebbles 1100 72 Drinks Choosing 1100 73 Div. 64 1100 74 Salem and Sticks 1100 75 Karen and Morning 1100 76 Unimodal Array 1100 77 Odds and Ends 1100 78 New Building for SIS 1100 79 Technogoblet of Fire 1100 80 Gotta Catch Em' All! 1100 81 Shell Game 1100 82 Feed the cat 1100 83 Snacktower 1200 84 Sweet Problem 1200 85 Row 1200 86 Alex and broken contest 1200 87 Jamie and Alarm Snooze 1200 88 Vladik and flights 1200 89 The Artful Expedient 1200 90 Check the string 1200 91 Optimal Currency Exchange 1300 92 Packets 1300 93 Single Wildcard Pattern Matching 1300 94 Tritonic Iridescence 1300 95 Lesha and array splitting 1300 96 The Monster 1300 97 Kirill And The Game 1300 98 Birthday 1300 99 Cloning Toys 1400 100 A Prank 1400