Codeforces Div. 2E [Updated]

Index Problem Difficulty
1 Squares and not squares 1600
2 Comments 1700
3 Numbers Exchange 1800
4 Tree Reconstruction 1900
5 Mahmoud and Ehab and the xor-MST 1900
6 Maximize! 1900
7 Game of Stones 2000
8 The LCMs Must be Large 2000
9 Minimizing Difference 2000
10 Cashback 2000
11 Petya and Construction Set 2000
12 Danil and a Part-time Job 2000
13 Editor 2000
14 Polycarp and Snakes 2000
15 Hanoi Factory 2000
16 Dasha and Puzzle 2000
17 Sergey and Subway 2000
18 Compress Words 2000
19 Fire 2000
20 Trips 2100
21 Beautiful Mirrors 2100
22 Arithmetic Progression 2100
23 OpenStreetMap 2100
24 Number of Components 2100
25 Serval and Snake 2100
26 Segments Removal 2100
27 Coprocessor 2100
28 Lunar New Year and Red Envelopes 2100
29 Down or Right 2100
30 The Holmes Children 2100
31 Congruence Equation 2100
32 Common Number 2100
33 Product Oriented Recurrence 2200
34 Okabe and El Psy Kongroo 2200
35 Helping Hiasat 2200
36 Tourism 2200
37 Antenna Coverage 2200
38 Tree Folding 2200
39 Let Them Slide 2200
40 Alternating Tree 2200
41 Mahmoud and a xor trip 2200
42 Sagheer and Apple Tree 2200
43 Marbles 2200
44 Hyakugoku and Ladders 2300
45 Maximum Questions 2300
46 Birds 2300
47 Anton and Permutation 2300
48 The Number Games 2300
49 Vladik and cards 2300
50 Company 2300
51 Another Filling the Grid 2300
52 Vasya and Magic Matrix 2300
53 The Untended Antiquity 2300
54 The penguin's game 2400
55 The Cake Is a Lie 2400
56 Split the Tree 2400
57 Ehab and a component choosing problem 2400
58 Restore Array 2400
59 Bash Plays with Functions 2400
60 Sonya and Matrix Beauty 2400
61 Natasha, Sasha and the Prefix Sums 2400
62 Team Work 2400
63 Maximum Matching 2400
64 Ralph and Mushrooms 2400
65 Sonya and Ice Cream 2400
66 The Supersonic Rocket 2400
67 Palindromes in a Tree 2400
68 Eyes Closed 2500
69 Billiard 2500
70 Aquarium decoration 2500
71 Ehab and the Expected GCD Problem 2500
72 Neko and Flashback 2500
73 Vus the Cossack and a Field 2500
74 Nastya Hasn't Written a Legend 2500
75 Fafa and Ancient Mathematics 2500
76 Short Code 2500
77 Liar 2500
78 Policeman and a Tree 2600
79 Alice and the Unfair Game 2600
80 Colored Cubes 2600
81 Vladik and Entertaining Flags 2600
82 Inversions After Shuffle 2600
83 Jamie and Tree 2600
84 Mother of Dragons 2600
85 Nastya and King-Shamans 2600
86 Prime Gift 2600
87 Choosing Carrot 2700
88 An unavoidable detour for home 2700
89 Change-free 2700
90 Vasya and Shifts 2700
91 Little Brother 2700
92 Mike and code of a permutation 2700
93 Kuro and Topological Parity 2800
94 Dasha and cyclic table 2800
95 Magical Permutation 2800
96 Tree 2800
97 A Trance of Nightfall 2900
98 Broken Tree 2900
99 Icicles 2900
100 Hag's Khashba 3000