Solutions to Codeforces contests

There are solutions for the following codeforces problems:

Contests (problemset site)

1. 1627C - Not Assigning (problem site)
2. 1627B - Not Sitting (problem site)
3. 1627A - Not Shading (problem site)
4. 1536D - Omkar and Medians (problem site)
5. 1536C - Diluc and Kaeya (problem site)
6. 1536B - Prinzessin der Verurteilung (problem site)
7. 1536A - Omkar and Bad Story (problem site)
8. 1517C - Fillomino 2 (problem site)
9. 1517B - Morning Jogging (problem site)
10. 1517A - Sum of 2050 (problem site)
11. 1500B - Two chandeliers (problem site)
12. 1407E - Egor in the Republic of Dagestan (problem site)
13. 1407D - Discrete Centrifugal Jumps (problem site)
14. 1407C - Chocolate Bunny (problem site)
15. 1407B - Big Vova (problem site)
16. 1407A - Ahahahahahahahaha (problem site)
17. 1406E - Deleting Numbers (problem site)
18. 1406D - Three Sequences (problem site)
19. 1406C - Link Cut Centroids (problem site)
20. 1406B - Maximum Product (problem site)
21. 1406A - Subset Mex (problem site)
22. 1316D - Nash Matrix (problem site)
23. 1316C - Primitive Primes (problem site)
24. 1316B - String Modification (problem site)
25. 1316A - Grade Allocation (problem site)
26. 1315C - Restoring Permutation (problem site)
27. 1315B - Homecoming (problem site)
28. 1315A - Dead Pixel (problem site)
29. 1313C2 - Skyscrapers (hard version) (problem site)
30. 1313C1 - Skyscrapers (easy version) (problem site)
31. 1313B - Different Rules (problem site)
32. 1313A - Fast Food Restaurant (problem site)
33. 1310A - Recommendations (problem site)
34. 1307D - Cow and Fields (problem site)
35. 1307A - Cow and Fields (problem site)
36. 1305E - Kuroni and the Score Distribution (problem site)
37. 1305D - Kuroni and the Celebration (problem site)
38. 1305C - Kuroni and Impossible Calculation (problem site)
39. 1305B - Kuroni and Simple Strings (problem site)
40. 1305A - Kuroni and the Gifts (problem site)
41. 1304F1 - F1. Animal Observation (easy version) (problem site)
42. 1304E - 1-Trees and Queries (problem site)
43. 1304D - Shortest and Longest LIS (problem site)
44. 1304C - Air Conditioner (problem site)
45. 1304B - Longest Palindrome (problem site)
46. 1304A - Two Rabbits (problem site)
47. 1300B - Assigning to Classes (problem site)
48. 1300A - Non-zero (problem site)
49. 1299C - Water Balance (problem site)
50. 1299B - Aerodynamic (problem site)
51. 1299A - Anu Has a Function (problem site)
52. 1291B - Array Sharpening (problem site)
53. 1291A - Even But Not Even (problem site)
54. 1253E - Antenna Coverage (problem site)
55. 1253D - Harmonious Graph (problem site)
56. 1253C - Sweets Eating (problem site)
57. 1253B - Silly Mistake (problem site)
58. 1253A - Single Push (problem site)
59. 1242B - 0-1 MST (problem site)
60. 1228F - One Node is Gone (problem site)
61. 1228D - Complete Tripartite (problem site)
62. 1228C - Primes and Multiplication (problem site)
63. 1228B - Filling the Grid (problem site)
64. 1228A - Distinct Digits (problem site)
65. 1227D2 - Optimal Subsequences (Hard Version) (problem site)
66. 1227D1 - Optimal Subsequences (Easy Version) (problem site)
67. 1227C - Messy (problem site)
68. 1223C - Save the Nature (problem site)
69. 1223B - Strings Equalization (problem site)
70. 1223A - CME (problem site)
71. 1208F - Bits and Pieces (problem site)
72. 1208E - Let Them Slide (problem site)
73. 1208D - Restore Permutation (problem site)
74. 1208C - Magic Grid (problem site)
75. 1208B - Uniqueness (problem site)
76. 1208A - XORinacci (problem site)
77. 1204D2 - Kirk and a Binary String (hard version) (problem site)
78. 1204D1 - Kirk and a Binary String (easy version) (problem site)
79. 1204C - Anna, Svyatoslav and Maps (problem site)
80. 1204B - Mislove Has Lost an Array (problem site)
81. 1204A - BowWow and the Timetable (problem site)
82. 1201D - Treasure Hunting (problem site)
83. 1201C - Maximum Median (problem site)
84. 1201B - Zero Array (problem site)
85. 1201A - Important Exam (problem site)
86. 1199B - Water Lily (problem site)
87. 1199A - City Day (problem site)
88. 1198B - Welfare State (problem site)
89. 1198A - MP3 (problem site)
90. 1195E - OpenStreetMap (problem site)
91. 1195D1 - Submarine in the Rybinsk Sea (easy edition) (problem site)
92. 1195C - Basketball Exercise (problem site)
93. 1195B - Sport Mafia (problem site)
94. 1195A - Drinks Choosing (problem site)
95. 1186D - Vus the Cossack and Numbers (problem site)
96. 1186A - Vus the Cossack and a Contest (problem site)
97. 1175D - Array Splitting (problem site)
98. 1169B - Pairs (problem site)
99. 1169A - Circle Metro (problem site)
100. 1168A - Increasing by Modulo (problem site)
101. 1151D - Stas and the Queue at the Buffet (problem site)
102. 1151C - Problem for Nazar (problem site)
103. 1151B - Dima and a Bad XOR (problem site)
104. 1151A - Maxim and Biology (problem site)
105. 1148E - Earth Wind and Fire (problem site)
106. 1148D - Dirty Deeds Done Dirt Cheap (problem site)
107. 1148C - Crazy Diamond (problem site)
108. 1148B - Born This Way (problem site)
109. 1148A - Another One Bites The Dust (problem site)
110. 1131F - Asya And Kittens (problem site)
111. 1131D - Gourmet choice (problem site)
112. 1131C - Birthday (problem site)
113. 1131B - Draw! (problem site)
114. 1131A - Sea Battle (problem site)
115. 1130C - Connect (problem site)
116. 1130B - Two Cakes (problem site)
117. 1130A - Be Positive (problem site)
118. 1129A2 - Toy Train (problem site)
119. 1129A1 - Toy Train (Simplified) (problem site)
120. 1082C - Multi-Subject Competition (problem site)
121. 1082B - Vova and Trophies (problem site)
122. 1082A - Vasya and Book (problem site)
123. 1080C - Masha and two friends (problem site)
124. 1080B - Margarite and the best present (problem site)
125. 1080A - Petya and Origami (problem site)
126. 1068C - Colored Rooks (problem site)
127. 1068B - LCM (problem site)
128. 1068A - Birthday (problem site)
129. 1067C - Knights (problem site)
130. 1061C - Multiplicity (problem site)
131. 1061B - Views Matter (problem site)
132. 1061A - Coins (problem site)
133. 1056D - Decorate Apple Tree (problem site)
134. 1056C - Pick Heroes (problem site)
135. 1056B - Divide Candies (problem site)
136. 1056A - Determine Line (problem site)
137. 1047B - Cover Points (problem site)
138. 1047A - Little C Loves 3 I (problem site)
139. 1043A - Elections (problem site)
140. 1042C - Array Product (problem site)
141. 1042B - Vitamins (problem site)
142. 1042A - Benches (problem site)
143. 1040B - Shashlik Cooking (problem site)
144. 1040A - Palindrome Dance (problem site)
145. 1039B - Subway Pursuit (problem site)
146. 1038D - Slime (problem site)
147. 1038C - Gambling (problem site)
148. 1038B - Non-Coprime Partition (problem site)
149. 1038A - Equality (problem site)
150. 1037D - Valid BFS? (problem site)
151. 1037C - Equalize (problem site)
152. 1037B - Reach Median (problem site)
153. 1037A - Packets (problem site)
154. 1034A - Enlarge GCD (problem site)
155. 1032D - Barcelonian Distance (problem site)
156. 1032C - Playing Piano (problem site)
157. 1032B - Personalized Cup (problem site)
158. 1032A - Kitchen Utensils (problem site)
159. 1030D - Vasya and Triangle (problem site)
160. 1030C - Vasya and Golden Ticket (problem site)
161. 1030B - Vasya and Cornfield (problem site)
162. 1030A - In Search of an Easy Problem (problem site)
163. 1020B - Badge (problem site)
164. 1020A - New Building for SIS (problem site)
165. 1019A - Elections (problem site)
166. 1012B - Chemical table (problem site)
167. 989C - A Mist of Florescence (problem site)
168. 984B - Minesweeper (problem site)
169. 984A - Game (problem site)
170. 983A - Finite or not? (problem site)
171. 960C - Subsequence Counting (problem site)
172. 960B - Minimize the error (problem site)
173. 960A - Check the string (problem site)
174. 954E - Water Taps (problem site)
175. 954D - Fight Against Traffic (problem site)
176. 954C - Matrix Walk (problem site)
177. 954B - String Typing (problem site)
178. 954A - Diagonal Walking (problem site)
179. 935D - Fafa and Ancient Alphabet (problem site)
180. 935C - Fifa and Fafa (problem site)
181. 935B - Fafa and the Gates (problem site)
182. 935A - Fafa and his Company (problem site)
183. 922D - Robot Vacuum Cleaner (problem site)
184. 906A - Shockers (problem site)
185. 897B - Chtholly's request (problem site)
186. 897A - Scarborough Fair (problem site)
187. 896A - Nephren gives a riddle (problem site)
188. 869C - The Intriguing Obsession (problem site)
189. 805B - 3-palindrome (problem site)
190. 805A - Fake NP (problem site)
191. 804B - Minimum number of steps (problem site)
192. 804A - Find Amir (problem site)
193. 798B - Mike and strings (problem site)
194. 798A - Buying A House (problem site)
195. 796B - Find The Bone (problem site)
196. 796A - Buying A House (problem site)
197. 455A - Boredom (problem site)
198. 4D - Mysterious Present (problem site)
199. 4C - Registration System (problem site)
200. 4B - Before an Exam (problem site)
201. 4A - Watermelon (problem site)
202. 2A - Winner (problem site)
203. 1A - Theatre Square (problem site)

acm.sgu.ru (problemset site)

1. 100 - A+B (problem site)
2. 102 - Coprimes (problem site)
3. 105 - Div 3 (problem site)
4. 112 - a^b - b^a (problem site)
5. 116 - Index of super-prime (problem site)
6. 117 - Counting (problem site)
7. 123 - The sum (problem site)
8. 174 - Walls (problem site)
9. 275 - To xor or not to xor (problem site)
10. 403 - Scientific Problem (problem site)
11. 404 - Fortune-telling with camomile (problem site)
12. 460 - Plural Form of Nouns (problem site)
13. 486 - Bulls and Cows (problem site)