Problemset - Codeforces

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Codeforces Round 978 (Div. 2)
6 days

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Problems

#	Name
1214D	Treasure Island dfs and similar, dp, flows, hashing	1900	x5181
1214C	Bad Sequence data structures, greedy	1200	x13264
1214B	Badges brute force, math	1100	x10845
1214A	Optimal Currency Exchange brute force, math	1400	x9094
1213G	Path Queries divide and conquer, dsu, graphs, sortings, trees	1800	x7270
1213F	Unstable String Sort data structures, dfs and similar, dsu, graphs, greedy, implementation, strings	2100	x2597
1213E	Two Small Strings brute force, constructive algorithms	1900	x5172
1213D2	Equalizing by Division (hard version) brute force, math, sortings	1600	x11440
1213D1	Equalizing by Division (easy version) brute force, implementation	1500	x11384
1213C	Book Reading math	1200	x18443
1213B	Bad Prices data structures, implementation	1100	x26639
1213A	Chips Moving math	900	x24079
1211I	Unusual Graph *special problem, graphs	3000	x40
1211H	Road Repair in Treeland *special problem, binary search, dp, trees	3100	x45
1211G	King's Path *special problem, math, trees	2500	x71
1211F	kotlinkotlinkotlinkotlin... *special problem, graphs, implementation, strings	2300	x124
1211E	Double Permutation Inc. *special problem, binary search, greedy	2000	x193
1211D	Teams *special problem, binary search, greedy, math	2000	x229
1211C	Ice Cream *special problem, greedy, sortings	1700	x486
1211B	Traveling Around the Golden Ring of Berland *special problem, implementation	1500	x764
1211A	Three Problems *special problem, implementation	1000	x1404
1210G	Mateusz and Escape Room dp	3500	x168
1210F2	Marek and Matching (hard version) brute force, probabilities	3200	x213
1210F1	Marek and Matching (easy version) brute force, probabilities	3100	x205
1210E	Wojtek and Card Tricks math	2700	x406
1210D	Konrad and Company Evaluation graphs	2400	x1511
1210C	Kamil and Making a Stream math, number theory, trees	2000	x3329
1210B	Marcin and Training Camp brute force, greedy	1700	x5824
1210A	Anadi and Domino brute force, graphs	1700	x5164
1209H	Moving Walkways data structures, greedy, math	3300	x141
1209G2	Into Blocks (hard version) data structures	3200	x442
1209G1	Into Blocks (easy version) data structures, dsu, greedy, implementation, two pointers	2000	x3219
1209F	Koala and Notebook data structures, dfs and similar, graphs, shortest paths, strings, trees	2600	x1150
1209E2	Rotate Columns (hard version) bitmasks, dp, greedy, sortings	2500	x1969
1209E1	Rotate Columns (easy version) bitmasks, brute force, dp, greedy, sortings	2000	x2969
1209D	Cow and Snacks dfs and similar, dsu, graphs	1700	x9286
1209C	Paint the Digits constructive algorithms, greedy, implementation	1500	x7497
1209B	Koala and Lights implementation, math, number theory	1300	x8163
1209A	Paint the Numbers greedy, implementation, math	800	x12200
1208H	Red Blue Tree data structures, implementation, trees	3500	x152
1208G	Polygons greedy, math, number theory	2800	x765
1208F	Bits And Pieces bitmasks, dfs and similar, dp, greedy	2600	x2464
1208E	Let Them Slide data structures, implementation	2200	x2034
1208D	Restore Permutation binary search, data structures, greedy, implementation	1900	x4903
1208C	Magic Grid constructive algorithms	1800	x6021
1208B	Uniqueness binary search, brute force, implementation, two pointers	1500	x10402
1208A	XORinacci math	900	x16782
1207G	Indie Album data structures, dfs and similar, hashing, string suffix structures, strings, trees	2700	x1027
1207F	Remainder Problem brute force, data structures, implementation	2100	x5247
1207E	XOR Guessing bitmasks, interactive, math	1900	x5957
1207D	Number Of Permutations combinatorics	1800	x6081
1207C	Gas Pipeline dp, greedy	1500	x9861
1207B	Square Filling constructive algorithms, greedy, implementation	1200	x13259
1207A	There Are Two Types Of Burgers brute force, greedy, implementation, math	800	x21764
1206B	Make Product Equal One dp, implementation	900	x26913
1206A	Choose Two Numbers math, sortings	800	x24398
1205F	Beauty of a Permutation constructive algorithms, math	3400	x123
1205E	Expected Value Again combinatorics, strings	3100	x283
1205D	Almost All constructive algorithms, trees	2700	x657
1205C	Palindromic Paths implementation, interactive	2400	x1173
1205B	Shortest Cycle bitmasks, brute force, graphs, shortest paths	1900	x6669
1205A	Almost Equal constructive algorithms, greedy, math	1200	x14143
1204E	Natasha, Sasha and the Prefix Sums combinatorics, dp, math, number theory	2300	x1669
1204D2	Kirk and a Binary String (hard version) data structures, greedy, math, strings	2100	x3238
1204D1	Kirk and a Binary String (easy version) brute force, greedy, strings	2000	x3072
1204C	Anna, Svyatoslav and Maps dp, graphs, greedy, shortest paths	1700	x6680
1204B	Mislove Has Lost an Array greedy, math	900	x17523
1204A	BowWow and the Timetable math	1000	x20874
1203F2	Complete the Projects (hard version) dp, greedy	2300	x2886
1203F1	Complete the Projects (easy version) greedy	2100	x3547
1203E	Boxers greedy, sortings	1500	x13831
1203D2	Remove the Substring (hard version) binary search, greedy, implementation, two pointers	1700	x7393
1203D1	Remove the Substring (easy version) greedy, implementation	1600	x8765
1203C	Common Divisors implementation, math	1300	x20614
1203B	Equal Rectangles greedy, math	1200	x15983
1203A	Circle of Students implementation	1000	x16694
1202F	You Are Given Some Letters... binary search, implementation, math	2700	x399
1202E	You Are Given Some Strings... brute force, string suffix structures, strings	2400	x2114
1202D	Print a 1337-string... combinatorics, constructive algorithms, math, strings	1900	x5104
1202C	You Are Given a WASD-string... brute force, data structures, dp, greedy, implementation, math, strings	2100	x2544
1202B	You Are Given a Decimal String... brute force, dp, shortest paths	1700	x4565
1202A	You Are Given Two Binary Strings... bitmasks, greedy	1100	x9355
1201E2	Knightmare (hard) graphs, interactive, shortest paths	3000	x147
1201E1	Knightmare (easy) graphs, interactive, shortest paths	2900	x132
1201D	Treasure Hunting binary search, dp, greedy, implementation	2100	x2361
1201C	Maximum Median binary search, greedy, math, sortings	1400	x23643
1201B	Zero Array greedy, math	1500	x18834
1201A	Important Exam implementation, strings	900	x15662
1200F	Graph Traveler brute force, data structures, dfs and similar, dp, graphs, implementation, math, number theory	2300	x1073
1200E	Compress Words brute force, hashing, implementation, string suffix structures, strings	2000	x7650
1200D	White Lines brute force, data structures, dp, implementation, two pointers	1900	x4128
1200C	Round Corridor math, number theory	1400	x9868
1200B	Block Adventure dp, greedy	1200	x13974
1200A	Hotelier brute force, data structures, implementation	800	x20348
1199B	Water Lily geometry, math	1000	x20480
1199A	City Day implementation	1000	x14844
1198F	GCD Groups 2 greedy, number theory, probabilities	2900	x880
1198E	Rectangle Painting 2 flows, graph matchings, graphs	2500	x1180
1198D	Rectangle Painting 1 dp	2300	x3264
1198C	Matching vs Independent Set constructive algorithms, graphs, greedy, sortings	2000	x3572