Problemset - Codeforces

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Codeforces Round 973 (Div. 2)
01:02:56

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Codeforces Round 974 (Div. 3)
23:02:57
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Problems

#	Name
1057C	Tanya and Colored Candies *special problem, dp	2000	x912
1056E	Check Transcription brute force, data structures, hashing, strings	2100	x2238
1055C	Lucky Days math, number theory	1900	x1906
1054D	Changing Array greedy, implementation	1900	x2239
1044C	Optimal Polygon Perimeter dp, geometry	2100	x1343
1044B	Intersecting Subtrees dfs and similar, interactive, trees	1900	x1564
1043E	Train Hard, Win Easy constructive algorithms, greedy, math, sortings	1900	x2723
1041E	Tree Reconstruction constructive algorithms, data structures, graphs, greedy	1900	x3579
1039B	Subway Pursuit binary search, interactive, probabilities	2100	x2352
1036C	Classy Numbers combinatorics, dp	1900	x9493
1033D	Divisors interactive, math, number theory	2000	x2386
1032E	The Unbearable Lightness of Weights dp, math	2100	x1677
1032D	Barcelonian Distance geometry, implementation	1900	x2807
1031D	Minimum path greedy	1900	x2795
1030E	Vasya and Good Sequences bitmasks, dp	2000	x3086
1029F	Multicolored Markers binary search, brute force, math, number theory	2000	x2563
1029E	Tree with Small Distances dp, graphs, greedy	2100	x2914
1029D	Concatenated Multiples implementation, math	1900	x3851
1028D	Order book combinatorics, data structures, greedy	2100	x1735
1027E	Inverse Coloring combinatorics, dp, math	2100	x2103
1025D	Recovering BST brute force, dp, math, number theory, trees	2100	x3634
1023E	Down or Right constructive algorithms, interactive, matrices	2100	x2020
1019B	The hat binary search, interactive	2000	x1940
1017D	The Wu bitmasks, brute force, data structures	1900	x3486
1015E2	Stars Drawing (Hard Edition) binary search, dp, greedy	1900	x3585
1012C	Hills dp	1900	x3479
1012B	Chemical table constructive algorithms, dfs and similar, dsu, graphs, matrices	1900	x3933
1010D	Mars rover dfs and similar, graphs, implementation, trees	2000	x2375
1009E	Intercity Travelling combinatorics, math, probabilities	2000	x2969
1006F	Xor-Paths bitmasks, brute force, dp, meet-in-the-middle	2100	x5264
1005F	Berland and the Shortest Paths brute force, dfs and similar, graphs, shortest paths	2100	x1682
1003E	Tree Constructing constructive algorithms, graphs	2100	x2701
1002E2	Another array reconstruction algorithm	1900	x203
1002A4	Generate W state	1900	x267
1000E	We Need More Bosses dfs and similar, graphs, trees	2100	x4589
1000D	Yet Another Problem On a Subsequence combinatorics, dp	1900	x4185
999F	Cards and Joy dp	2000	x2660
999E	Reachability from the Capital dfs and similar, graphs, greedy	2000	x6610
999D	Equalize the Remainders data structures, greedy, implementation	1900	x4346
997B	Roman Digits brute force, combinatorics, dp, greedy, math	2000	x2951
995A	Tesla constructive algorithms, implementation	2100	x1690
993C	Careful Maneuvering bitmasks, brute force, geometry	2100	x1693
993B	Open Communication bitmasks, brute force	1900	x1945
992D	Nastya and a Game brute force, implementation, math	2100	x1644
990E	Post Lamps brute force, greedy	2100	x2009
988F	Rain and Umbrellas dp	2100	x2312
988E	Divisibility by 25 brute force, greedy	2100	x3938
985E	Pencils and Boxes binary search, data structures, dp, greedy, two pointers	2100	x3637
985D	Sand Fortress binary search, constructive algorithms, math	2100	x2544
982D	Shark brute force, data structures, dsu, trees	1900	x2288
981D	Bookshelves bitmasks, dp, greedy	1900	x3236
980D	Perfect Groups dp, math, number theory	2100	x2658
976E	Well played! greedy, sortings	2100	x2388
975D	Ghosts geometry, math	2000	x2144
965D	Single-use Stones binary search, flows, greedy, two pointers	1900	x3072
965C	Greedy Arkady math	2000	x2091
963B	Destruction of a Tree constructive algorithms, dfs and similar, dp, greedy, trees	2000	x2789
961E	Tufurama data structures	1900	x3599
961D	Pair Of Lines geometry	2000	x4250
960F	Pathwalks data structures, dp, graphs	2100	x2957
960D	Full Binary Tree Queries brute force, implementation, trees	2100	x1880
959E	Mahmoud and Ehab and the xor-MST bitmasks, dp, graphs, implementation, math	1900	x3390
959D	Mahmoud and Ehab and another array construction task constructive algorithms, greedy, math, number theory	1900	x3083
958C2	Encryption (medium) dp	2000	x1247
958A2	Death Stars (medium) hashing, strings	2000	x898
955C	Sad powers binary search, math, number theory	2100	x2699
954G	Castle Defense binary search, data structures, greedy, two pointers	2000	x2140
954F	Runner's Problem dp, matrices, sortings	2100	x1208
954E	Water Taps binary search, greedy, sortings	2000	x1883
952E	Cheese Board	2000	x635
952B	A Map of the Cat brute force, interactive	1900	x2043
949C	Data Center Maintenance dfs and similar, graphs	1900	x2041
940E	Cashback data structures, dp, greedy, math	2000	x3697
938D	Buy a Ticket data structures, graphs, shortest paths	2000	x5618
936B	Sleepy Game dfs and similar, dp, games, graphs	2100	x3251
935D	Fafa and Ancient Alphabet math, probabilities	1900	x2568
933B	A Determined Cleanup math	2000	x1911
930C	Teodor is not a liar! data structures, dp	1900	x2116
928D	Autocompletion *special problem, strings, trees	1900	x806
928C	Dependency management *special problem, graphs, implementation	1900	x885
926J	Segments data structures	2100	x384
926F	Mobile Communications	2000	x227
926E	Merge Equal Elements constructive algorithms, data structures	1900	x926
920F	SUM and REPLACE brute force, data structures, dsu, number theory	2000	x6677
920E	Connected Components? data structures, dfs and similar, dsu, graphs	2100	x6286
919E	Congruence Equation chinese remainder theorem, math, number theory	2100	x2097
916B	Jamie and Binary Sequence (changed after round) bitmasks, greedy, math	2000	x1899
914D	Bash and a Tough Math Puzzle data structures, number theory	1900	x5263
912D	Fishes data structures, graphs, greedy, probabilities, shortest paths	2100	x2007
911E	Stack Sorting constructive algorithms, data structures, greedy, implementation	2000	x2526
909E	Coprocessor dfs and similar, dp, graphs, greedy	1900	x2064
909D	Colorful Points data structures, greedy, implementation	2100	x1931
900E	Maximum Questions data structures, dp, strings	2100	x1233
900D	Unusual Sequences bitmasks, combinatorics, dp, math, number theory	2000	x3204
899F	Letters Removing data structures, strings	2100	x1828
899E	Segments Removal data structures, dsu, flows, implementation, two pointers	2000	x3020
896B	Ithea Plays With Chtholly binary search, constructive algorithms, games, greedy, interactive	2000	x2113
895D	String Mark combinatorics, math, strings	2100	x1107
895C	Square Subsets bitmasks, combinatorics, dp, math	2000	x5465
894E	Ralph and Mushrooms dp, graphs	2100	x2305