Problemset - Codeforces

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Codeforces Round 977 (Div. 2)
2 days
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Problems

#	Name
920D	Tanks dp, greedy, implementation	2400	x710
920C	Swap Adjacent Elements dfs and similar, greedy, math, sortings, two pointers	1400	x9175
920B	Tea Queue implementation	1200	x7298
920A	Water The Garden implementation	1000	x7715
919F	A Game With Numbers games, graphs, shortest paths	2600	x336
919E	Congruence Equation chinese remainder theorem, math, number theory	2100	x2102
919D	Substring dfs and similar, dp, graphs	1700	x9915
919C	Seat Arrangements brute force, implementation	1300	x8967
919B	Perfect Number binary search, brute force, dp, implementation, number theory	1100	x28072
919A	Supermarket brute force, greedy, implementation	800	x16109
918B	Radio Station implementation, strings	900	x16390
918A	Eleven brute force, implementation	800	x17017
917E	Upside Down data structures, string suffix structures, strings, trees	3400	x133
917D	Stranger Trees dp, math, matrices, trees	2600	x1141
917C	Pollywog combinatorics, dp, matrices	2900	x393
917B	MADMAX dfs and similar, dp, games, graphs	1700	x3533
917A	The Monster dp, greedy, implementation, math	1800	x3511
916E	Jamie and Tree data structures, trees	2400	x1657
916D	Jamie and To-do List data structures, interactive, trees	2200	x509
916C	Jamie and Interesting Graph constructive algorithms, graphs, shortest paths	1600	x5092
916B	Jamie and Binary Sequence (changed after round) bitmasks, greedy, math	2000	x1905
916A	Jamie and Alarm Snooze brute force, implementation, math	900	x8593
915G	Coprime Arrays math, number theory	2300	x1231
915F	Imbalance Value of a Tree data structures, dsu, graphs, trees	2400	x2461
915E	Physical Education Lessons data structures, implementation, sortings	2300	x4379
915D	Almost Acyclic Graph dfs and similar, graphs	2200	x3426
915C	Permute Digits dp, greedy	1700	x7036
915B	Browser implementation	1300	x7735
915A	Garden implementation	900	x14667
914H	Ember and Storm's Tree Game combinatorics, dp, games, trees	3400	x238
914G	Sum the Fibonacci bitmasks, divide and conquer, dp, fft, math	2600	x927
914F	Substrings in a String bitmasks, brute force, data structures, string suffix structures, strings	3000	x1636
914E	Palindromes in a Tree bitmasks, data structures, divide and conquer, trees	2400	x1488
914D	Bash and a Tough Math Puzzle data structures, number theory	1900	x5284
914C	Travelling Salesman and Special Numbers brute force, combinatorics, dp	1800	x3741
914B	Conan and Agasa play a Card Game games, greedy, implementation	1200	x8611
914A	Perfect Squares brute force, implementation, math	900	x14065
913H	Don't Exceed math, probabilities	3400	x127
913G	Power Substring math, number theory	3200	x208
913F	Strongly Connected Tournament dp, graphs, math, probabilities	2800	x653
913E	Logical Expression bitmasks, dp, shortest paths	2400	x773
913D	Too Easy Problems binary search, brute force, data structures, greedy, sortings	1800	x4733
913C	Party Lemonade bitmasks, dp, greedy	1600	x7913
913B	Christmas Spruce implementation, trees	1200	x16030
913A	Modular Exponentiation implementation, math	900	x21219
912E	Prime Gift binary search, dfs and similar, math, meet-in-the-middle, number theory, two pointers	2400	x1579
912D	Fishes data structures, graphs, greedy, probabilities, shortest paths	2100	x2013
912C	Perun, Ult! brute force, greedy, sortings	2500	x518
912B	New Year's Eve bitmasks, constructive algorithms, number theory	1300	x12018
912A	Tricky Alchemy implementation	800	x13487
911G	Mass Change Queries data structures	2500	x2878
911F	Tree Destruction constructive algorithms, dfs and similar, graphs, greedy, trees	2400	x1691
911E	Stack Sorting constructive algorithms, data structures, greedy, implementation	2000	x2536
911D	Inversion Counting brute force, math	1800	x4594
911C	Three Garlands brute force, constructive algorithms	1400	x7038
911B	Two Cakes binary search, brute force, implementation	1200	x11366
911A	Nearest Minimums implementation	1100	x11448
910C	Minimum Sum constructive algorithms, greedy, math	1700	x1803
910B	Door Frames greedy, implementation	1600	x1702
910A	The Way to Home dfs and similar, dp, greedy, implementation	800	x11827
909F	AND-permutations constructive algorithms	2500	x581
909E	Coprocessor dfs and similar, dp, graphs, greedy	1900	x2074
909D	Colorful Points data structures, greedy, implementation	2100	x1935
909C	Python Indentation dp	1800	x4902
909B	Segments constructive algorithms, math	1300	x6384
909A	Generate Login brute force, greedy, sortings	1000	x9309
908H	New Year and Boolean Bridges	3100	x380
908G	New Year and Original Order dp, math	2800	x1357
908F	New Year and Rainbow Roads graphs, greedy, implementation	2400	x1395
908E	New Year and Entity Enumeration bitmasks, combinatorics, dp, math	2500	x759
908D	New Year and Arbitrary Arrangement dp, math, probabilities	2200	x2333
908C	New Year and Curling brute force, geometry, implementation, math	1500	x6911
908B	New Year and Buggy Bot brute force, implementation	1200	x7644
908A	New Year and Counting Cards brute force, implementation	800	x14798
907B	Tic-Tac-Toe implementation	1400	x4063
907A	Masha and Bears brute force, implementation	1300	x5694
906E	Reverses dp, string suffix structures, strings	3300	x447
906D	Power Tower chinese remainder theorem, math, number theory	2700	x2103
906C	Party bitmasks, brute force, dp, graphs	2400	x1352
906B	Seating of Students brute force, constructive algorithms, math	2200	x1141
906A	Shockers implementation, strings	1600	x4128
903G	Yet Another Maxflow Problem data structures, flows, graphs	2700	x529
903F	Clear The Matrix bitmasks, dp	2200	x648
903E	Swapping Characters brute force, hashing, implementation, strings	2200	x1465
903D	Almost Difference data structures, math	2200	x3777
903C	Boxes Packing greedy	1200	x17342
903B	The Modcrab greedy, implementation	1200	x7732
903A	Hungry Student Problem greedy, implementation	900	x14579
902B	Coloring a Tree dfs and similar, dsu, greedy	1200	x10805
902A	Visiting a Friend greedy, implementation	1100	x9805
901E	Cyclic Cipher fft, math	3300	x87
901D	Weighting a Tree constructive algorithms, dfs and similar, graphs	2700	x504
901C	Bipartite Segments binary search, data structures, dfs and similar, dsu, graphs, two pointers	2300	x1170
901B	GCD of Polynomials constructive algorithms, math	2200	x1583
901A	Hashing Trees constructive algorithms, trees	1500	x5113
900E	Maximum Questions data structures, dp, strings	2100	x1261
900D	Unusual Sequences bitmasks, combinatorics, dp, math, number theory	2000	x3222
900C	Remove Extra One brute force, data structures, math	1700	x4553
900B	Position in Fraction math, number theory	1300	x7826
900A	Find Extra One geometry, implementation	800	x13583