Problemset - Codeforces

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Educational Codeforces Round 81 (Rated for Div. 2)
08:01:51
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Problems

#	Name
1294B	Collecting Packages implementation, sortings	1200	x9817
1285E	Delete a Segment brute force, constructive algorithms, data structures, dp, graphs, sortings, trees, two pointers	2300	x796
1286A	Garland dp, greedy, sortings	1700	x3964
1284E	New Year and Castle Construction combinatorics, geometry, math, sortings	2500	x609
1284D	New Year and Conference binary search, data structures, hashing, sortings	2100	x1845
1284B	New Year and Ascent Sequence binary search, combinatorics, data structures, dp, implementation, sortings	1500	x6268
1270D	Strange Device constructive algorithms, interactive, math, sortings	1900	x2919
1282C	Petya and Exam greedy, sortings, two pointers	1800	x2431
1282B2	K for the Price of One (Hard Version) dp, greedy, sortings	1600	x4814
1282B1	K for the Price of One (Easy Version) dp, greedy, sortings	1400	x5798
1269B	Modulo Equality brute force, sortings	1500	x4888
1271D	Portals data structures, dp, greedy, implementation, sortings	2100	x1128
1272A	Three Friends brute force, greedy, math, sortings	900	x10184
1267I	Intriguing Selection brute force, constructive algorithms, implementation, interactive, sortings	2700	x368
1260D	A Game with Traps binary search, dp, greedy, sortings	1900	x2069
1253E	Antenna Coverage data structures, dp, greedy, sortings	2200	x1481
1253D	Harmonious Graph constructive algorithms, dfs and similar, dsu, graphs, greedy, sortings	1700	x4109
1253C	Sweets Eating dp, greedy, math, sortings	1500	x5844
1257D	Yet Another Monster Killing Problem binary search, data structures, dp, greedy, sortings, two pointers	1700	x4072
1257C	Dominated Subarray greedy, implementation, sortings, strings, two pointers	1200	x8266
1242B	0-1 MST dfs and similar, dsu, graphs, sortings	1900	x3138
1256F	Equalizing Two Strings constructive algorithms, sortings, strings	2200	x1531
1256E	Yet Another Division Into Teams dp, greedy, sortings	2200	x1932
1251D	Salary Changing binary search, greedy, sortings	1800	x2951
1249D2	Too Many Segments (hard version) data structures, greedy, sortings	2000	x2340
1248B	Grow The Tree greedy, math, sortings	900	x8408
1237C2	Balanced Removals (Harder) binary search, constructive algorithms, divide and conquer, greedy, implementation, sortings	1900	x2534
1237B	Balanced Tunnel data structures, sortings, two pointers	1300	x6908
1244E	Minimizing Difference binary search, constructive algorithms, greedy, sortings, ternary search, two pointers	2000	x2578
1238G	Adilbek and the Watering System data structures, greedy, sortings	2700	x204
1238B	Kill `Em All greedy, sortings	1300	x7737
1223E	Paint the Tree dp, sortings, trees	2200	x1425
1216B	Shooting greedy, implementation, sortings	1000	x9343
1221F	Choose a Square binary search, data structures, sortings	2500	x499
1220A	Cards implementation, sortings, strings	600	x12438
1209E2	Rotate Columns (hard version) bitmasks, dp, greedy, sortings	2400	x851
1209E1	Rotate Columns (easy version) bitmasks, brute force, dp, greedy, sortings	2000	x1564
1211C	Ice Cream *special problem, greedy, sortings	2000	x288
1214F	Employment greedy, sortings	2700	x261
1214E	Petya and Construction Set constructive algorithms, graphs, math, sortings, trees	2000	x1618
1213G	Path Queries divide and conquer, dsu, graphs, sortings, trees	2000	x2606
1213D2	Equalizing by Division (hard version) brute force, math, sortings	1600	x5606
1206A	Choose Two Numbers math, sortings	800	x12891
1203E	Boxers greedy, sortings	1500	x6653
1201C	Maximum Median binary search, greedy, math, sortings	1400	x6656
1198C	Matching vs Independent Set constructive algorithms, graphs, greedy, sortings	2200	x1876
1198B	Welfare State binary search, brute force, data structures, sortings	1600	x5376
1198A	MP3 sortings, two pointers	1700	x5528
1196F	K-th Path brute force, constructive algorithms, shortest paths, sortings	2500	x1202
1197E	Culture Code binary search, combinatorics, data structures, dp, shortest paths, sortings	2300	x845
1197C	Array Splitting greedy, sortings	1400	x7551
1197A	DIY Wooden Ladder greedy, math, sortings	1000	x9491
1195F	Geometers Anonymous Club data structures, geometry, math, sortings	2700	x319
1194E	Count The Rectangles bitmasks, brute force, data structures, geometry, sortings	2200	x1050
1190D	Tokitsukaze and Strange Rectangle data structures, divide and conquer, sortings, two pointers	2200	x1454
1184B2	The Doctor Meets Vader (Medium) flows, graph matchings, graphs, shortest paths, sortings	2300	x386
1184B1	The Doctor Meets Vader (Easy) binary search, sortings	1400	x2389
1189B	Number Circle greedy, math, sortings	1100	x7868
1187D	Subarray Sorting data structures, sortings	2200	x1374
1183G	Candy Box (hard version) greedy, implementation, sortings	2100	x1335
1183F	Topforces Strikes Back brute force, math, sortings	2400	x1004
1183D	Candy Box (easy version) greedy, sortings	1400	x7116
1185C1	Exam in BerSU (easy version) greedy, sortings	1200	x7551
1181E2	A Story of One Country (Hard) brute force, greedy, sortings	3000	x141
1181E1	A Story of One Country (Easy) brute force, divide and conquer, sortings	2600	x259
1181D	Irrigation binary search, data structures, implementation, sortings, trees, two pointers	2100	x1144
1176F	Destroy it! dp, implementation, sortings	2500	x803
1176D	Recover it! dfs and similar, graphs, greedy, number theory, sortings	1900	x2652
1175D	Array Splitting greedy, sortings	1900	x2978
1174B	Ehab Is an Odd Person sortings	1200	x7688
1174A	Ehab Fails to Be Thanos constructive algorithms, greedy, sortings	1000	x9431
1148E	Earth Wind and Fire constructive algorithms, greedy, math, sortings, two pointers	2300	x1112
1148D	Dirty Deeds Done Dirt Cheap greedy, sortings	1800	x3010
1148C	Crazy Diamond constructive algorithms, sortings	1700	x3289
1166C	A Tale of Two Lands binary search, sortings, two pointers	1600	x5220
1167F	Scalar Queries combinatorics, data structures, math, sortings	2300	x774
1165E	Two Arrays and Sum of Functions greedy, math, sortings	1800	x3660
1165B	Polycarp Training data structures, greedy, sortings	1000	x9425
1158C	Permutation recovery constructive algorithms, data structures, dfs and similar, graphs, greedy, math, sortings	2300	x970
1158A	The Party and Sweets binary search, constructive algorithms, greedy, implementation, math, sortings, two pointers	1500	x3956
1156C	Match Points binary search, greedy, sortings, ternary search, two pointers	2000	x3055
1156B	Ugly Pairs dfs and similar, greedy, implementation, sortings, strings	1800	x3516
1155A	Reverse a Substring implementation, sortings, strings	1000	x7722
1151D	Stas and the Queue at the Buffet greedy, math, sortings	1500	x4878
1154F	Shovels Shop dp, greedy, sortings	2300	x1455
1154E	Two Teams data structures, implementation, sortings	1800	x3024
1119D	Frets On Fire binary search, sortings	1700	x3208
1119B	Alyona and a Narrow Fridge binary search, flows, greedy, sortings	1300	x5991
1144C	Two Shuffled Sequences constructive algorithms, sortings	1100	x8100
1144B	Parity Alternated Deletions greedy, implementation, sortings	1000	x9596
1140C	Playlist brute force, data structures, sortings	1600	x4963
1136C	Nastya Is Transposing Matrices constructive algorithms, sortings	1500	x5272
1137A	Skyscrapers implementation, sortings	1600	x3013
1133E	K Balanced Teams dp, sortings, two pointers	2000	x2148
1133C	Balanced Team sortings, two pointers	1300	x7441
1132B	Discounts greedy, sortings	900	x7471
1121A	Technogoblet of Fire implementation, sortings	1100	x5210
1129C	Morse Code binary search, data structures, dp, hashing, sortings, string suffix structures, strings	2300	x549
1131C	Birthday binary search, greedy, sortings	1200	x7409
1117B	Emotes greedy, math, sortings	1000	x7533

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