README.md

Solutions to Codeforces contests

There are solutions for the following codeforces problems:

Contests (problemset site)

1. 1304F1 - F1. Animal Observation (easy version) (problem site)
2. 1304E - 1-Trees and Queries (problem site)
3. 1304D - Shortest and Longest LIS (problem site)
4. 1304C - Air Conditioner (problem site)
5. 1304B - Longest Palindrome (problem site)
6. 1304A - Two Rabbits (problem site)
7. 1300B - Assigning to Classes (problem site)
8. 1300A - Non-zero (problem site)
9. 1299C - Water Balance (problem site)
10. 1299B - Aerodynamic (problem site)
11. 1299A - Anu Has a Function (problem site)
12. 1291B - Array Sharpening (problem site)
13. 1291A - Even But Not Even (problem site)
14. 1253E - Antenna Coverage (problem site)
15. 1253D - Harmonious Graph (problem site)
16. 1253C - Sweets Eating (problem site)
17. 1253B - Silly Mistake (problem site)
18. 1253A - Single Push (problem site)
19. 1228F - One Node is Gone (problem site)
20. 1228D - Complete Tripartite (problem site)
21. 1228C - Primes and Multiplication (problem site)
22. 1228B - Filling the Grid (problem site)
23. 1228A - Distinct Digits (problem site)
24. 1227D2 - Optimal Subsequences (Hard Version) (problem site)
25. 1227D1 - Optimal Subsequences (Easy Version) (problem site)
26. 1227C - Messy (problem site)
27. 1223C - Save the Nature (problem site)
28. 1223B - Strings Equalization (problem site)
29. 1223A - CME (problem site)
30. 1208F - Bits and Pieces (problem site)
31. 1208E - Let Them Slide (problem site)
32. 1208D - Restore Permutation (problem site)
33. 1208C - Magic Grid (problem site)
34. 1208B - Uniqueness (problem site)
35. 1208A - XORinacci (problem site)
36. 1204D2 - Kirk and a Binary String (hard version) (problem site)
37. 1204D1 - Kirk and a Binary String (easy version) (problem site)
38. 1204C - Anna, Svyatoslav and Maps (problem site)
39. 1204B - Mislove Has Lost an Array (problem site)
40. 1204A - BowWow and the Timetable (problem site)
41. 1201D - Treasure Hunting (problem site)
42. 1201C - Maximum Median (problem site)
43. 1201B - Zero Array (problem site)
44. 1201A - Important Exam (problem site)
45. 1199B - Water Lily (problem site)
46. 1199A - City Day (problem site)
47. 1198B - Welfare State (problem site)
48. 1198A - MP3 (problem site)
49. 1195E - OpenStreetMap (problem site)
50. 1195D1 - Submarine in the Rybinsk Sea (easy edition) (problem site)
51. 1195C - Basketball Exercise (problem site)
52. 1195B - Sport Mafia (problem site)
53. 1195A - Drinks Choosing (problem site)
54. 1186D - Vus the Cossack and Numbers (problem site)
55. 1186A - Vus the Cossack and a Contest (problem site)
56. 1169B - Pairs (problem site)
57. 1169A - Circle Metro (problem site)
58. 1168A - Increasing by Modulo (problem site)
59. 1151D - Stas and the Queue at the Buffet (problem site)
60. 1151C - Problem for Nazar (problem site)
61. 1151B - Dima and a Bad XOR (problem site)
62. 1151A - Maxim and Biology (problem site)
63. 1148E - Earth Wind and Fire (problem site)
64. 1148D - Dirty Deeds Done Dirt Cheap (problem site)
65. 1148C - Crazy Diamond (problem site)
66. 1148B - Born This Way (problem site)
67. 1148A - Another One Bites The Dust (problem site)
68. 1131F - Asya And Kittens (problem site)
69. 1131D - Gourmet choice (problem site)
70. 1131C - Birthday (problem site)
71. 1131B - Draw! (problem site)
72. 1131A - Sea Battle (problem site)
73. 1130C - Connect (problem site)
74. 1130B - Two Cakes (problem site)
75. 1130A - Be Positive (problem site)
76. 1129A2 - Toy Train (problem site)
77. 1129A1 - Toy Train (Simplified) (problem site)
78. 1082C - Multi-Subject Competition (problem site)
79. 1082B - Vova and Trophies (problem site)
80. 1082A - Vasya and Book (problem site)
81. 1080C - Masha and two friends (problem site)
82. 1080B - Margarite and the best present (problem site)
83. 1080A - Petya and Origami (problem site)
84. 1068C - Colored Rooks (problem site)
85. 1068B - LCM (problem site)
86. 1068A - Birthday (problem site)
87. 1067C - Knights (problem site)
88. 1061C - Multiplicity (problem site)
89. 1061B - Views Matter (problem site)
90. 1061A - Coins (problem site)
91. 1056D - Decorate Apple Tree (problem site)
92. 1056C - Pick Heroes (problem site)
93. 1056B - Divide Candies (problem site)
94. 1056A - Determine Line (problem site)
95. 1047B - Cover Points (problem site)
96. 1047A - Little C Loves 3 I (problem site)
97. 1043A - Elections (problem site)
98. 1042C - Array Product (problem site)
99. 1042B - Vitamins (problem site)
100. 1042A - Benches (problem site)
101. 1040B - Shashlik Cooking (problem site)
102. 1040A - Palindrome Dance (problem site)
103. 1039B - Subway Pursuit (problem site)
104. 1038D - Slime (problem site)
105. 1038C - Gambling (problem site)
106. 1038B - Non-Coprime Partition (problem site)
107. 1038A - Equality (problem site)
108. 1037D - Valid BFS? (problem site)
109. 1037C - Equalize (problem site)
110. 1037B - Reach Median (problem site)
111. 1037A - Packets (problem site)
112. 1034A - Enlarge GCD (problem site)
113. 1032D - Barcelonian Distance (problem site)
114. 1032C - Playing Piano (problem site)
115. 1032B - Personalized Cup (problem site)
116. 1032A - Kitchen Utensils (problem site)
117. 1030D - Vasya and Triangle (problem site)
118. 1030C - Vasya and Golden Ticket (problem site)
119. 1030B - Vasya and Cornfield (problem site)
120. 1030A - In Search of an Easy Problem (problem site)
121. 1020B - Badge (problem site)
122. 1020A - New Building for SIS (problem site)
123. 1019A - Elections (problem site)
124. 984B - Minesweeper (problem site)
125. 984A - Game (problem site)
126. 983A - Finite or not? (problem site)
127. 960C - Subsequence Counting (problem site)
128. 960B - Minimize the error (problem site)
129. 960A - Check the string (problem site)
130. 954E - Water Taps (problem site)
131. 954D - Fight Against Traffic (problem site)
132. 954C - Matrix Walk (problem site)
133. 954B - String Typing (problem site)
134. 954A - Diagonal Walking (problem site)
135. 935D - Fafa and Ancient Alphabet (problem site)
136. 935C - Fifa and Fafa (problem site)
137. 935B - Fafa and the Gates (problem site)
138. 935A - Fafa and his Company (problem site)
139. 906A - Shockers (problem site)
140. 897B - Chtholly's request (problem site)
141. 897A - Scarborough Fair (problem site)
142. 896A - Nephren gives a riddle (problem site)
143. 805B - 3-palindrome (problem site)
144. 805A - Fake NP (problem site)
145. 804B - Minimum number of steps (problem site)
146. 804A - Find Amir (problem site)
147. 798B - Mike and strings (problem site)
148. 798A - Buying A House (problem site)
149. 796B - Find The Bone (problem site)
150. 796A - Buying A House (problem site)
151. 455A - Boredom (problem site)
152. 4D - Mysterious Present (problem site)
153. 4C - Registration System (problem site)
154. 4B - Before an Exam (problem site)
155. 4A - Watermelon (problem site)
156. 2A - Winner (problem site)
157. 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)