Problemset - Codeforces

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Codeforces Round 946 (Div. 3)
3 days
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Problems

#	Name
1299D	Around the World bitmasks, combinatorics, dfs and similar, dp, graphs, graphs, math, trees	3000	x419
1558E	Down Below binary search, dfs and similar, graphs, greedy, meet-in-the-middle, shortest paths	3000	x435
798E	Mike and code of a permutation constructive algorithms, data structures, graphs, sortings	3000	x458
235D	Graph Game graphs	3000	x476
1610F	Mashtali: a Space Oddysey constructive algorithms, dfs and similar, graphs	3000	x501
1534F2	Falling Sand (Hard Version) dfs and similar, dp, graphs, greedy	3000	x516
1889D	Game of Stacks brute force, dfs and similar, graphs, implementation, trees	3000	x524
1842H	Tenzing and Random Real Numbers bitmasks, dp, graphs, math, probabilities	3000	x563
1361E	James and the Chase dfs and similar, graphs, probabilities, trees	3000	x627
1290D	Coffee Varieties (hard version) constructive algorithms, graphs, interactive	3000	x668
1149D	Abandoning Roads brute force, dp, graphs, greedy	3000	x671
1163F	Indecisive Taxi Fee data structures, graphs, shortest paths	3000	x823
429E	Points and Segments graphs	3000	x834
1019C	Sergey's problem constructive algorithms, graphs	3000	x1077
464E	The Classic Problem data structures, graphs, shortest paths	3000	x1305
1090H	Linearization graphs	2900	x88
1201E1	Knightmare (easy) graphs, interactive, shortest paths	2900	x125
871E	Restore the Tree graphs, greedy, trees	2900	x147
331E1	Deja Vu constructive algorithms, graphs, implementation	2900	x162
980F	Cactus to Tree dp, graphs, trees	2900	x192
1510C	Cactus Not Enough dfs and similar, graph matchings, graphs	2900	x205
1056G	Take Metro brute force, data structures, graphs	2900	x238
687E	TOF dfs and similar, graphs	2900	x310
679D	Bear and Chase brute force, dfs and similar, graphs, implementation, math, probabilities	2900	x311
1494F	Delete The Edges brute force, constructive algorithms, dfs and similar, graphs, implementation	2900	x330
1266F	Almost Same Distance dfs and similar, graphs	2900	x331
1654G	Snowy Mountain data structures, dfs and similar, graphs, greedy, shortest paths, trees	2900	x357
848D	Shake It! combinatorics, dp, flows, graphs	2900	x365
1792F2	Graph Coloring (hard version) brute force, combinatorics, divide and conquer, dp, fft, graphs	2900	x373
1916F	Group Division constructive algorithms, dfs and similar, graphs, greedy	2900	x408
1835D	Doctor's Brown Hypothesis dfs and similar, graphs, math, number theory	2900	x449
704C	Black Widow dp, graphs, implementation, math	2900	x457
763D	Timofey and a flat tree data structures, graphs, hashing, shortest paths, trees	2900	x514
167E	Wizards and Bets dfs and similar, graphs, math, matrices	2900	x546
1062F	Upgrading Cities dfs and similar, graphs	2900	x554
1616F	Tricolor Triangles brute force, graphs, math, matrices	2900	x584
343E	Pumping Stations brute force, dfs and similar, divide and conquer, flows, graphs, greedy, trees	2900	x688
938G	Shortest Path Queries bitmasks, data structures, dsu, graphs	2900	x861
1218A	BubbleReactor dp, graphs	2800	x106
290F	Greedy Petya *special problem, dfs and similar, graphs, greedy	2800	x127
869D	The Overdosing Ubiquity brute force, dfs and similar, graphs	2800	x235
1031F	Familiar Operations brute force, graphs, math	2800	x265
1904F	Beautiful Tree data structures, dfs and similar, graphs, implementation, trees	2800	x309
1578A	Anti-Tetris constructive algorithms, graphs, shortest paths	2800	x328
762F	Tree nesting combinatorics, graphs, trees	2800	x345
1578K	Kingdom of Islands brute force, graphs, implementation	2800	x346
240E	Road Repairs dfs and similar, graphs, greedy	2800	x347
1721F	Matching Reduction brute force, constructive algorithms, dfs and similar, flows, graph matchings, graphs, interactive	2800	x365
850D	Tournament Construction constructive algorithms, dp, graphs, greedy, math	2800	x371
1389G	Directing Edges dfs and similar, dp, graphs, trees	2800	x381
842E	Nikita and game binary search, dfs and similar, divide and conquer, graphs, trees	2800	x397
1155F	Delivery Oligopoly brute force, dp, graphs	2800	x402
776F	Sherlock's bet to Moriarty constructive algorithms, data structures, divide and conquer, geometry, graphs, implementation, trees	2800	x415
1967D	Long Way to be Non-decreasing binary search, dfs and similar, graphs, implementation, shortest paths, two pointers	2800	x431
418D	Big Problems for Organizers data structures, graphs, trees	2800	x468
1572D	Bridge Club flows, graph matchings, graphs, greedy	2800	x471
1419F	Rain of Fire binary search, data structures, dfs and similar, dsu, graphs, implementation	2800	x474
819E	Mister B and Flight to the Moon constructive algorithms, graphs	2800	x501
685E	Travelling Through the Snow Queen's Kingdom bitmasks, brute force, divide and conquer, graphs	2800	x503
1291F	Coffee Varieties (easy version) graphs, interactive	2800	x504
1697F	Too Many Constraints 2-sat, constructive algorithms, graphs, implementation	2800	x515
1477D	Nezzar and Hidden Permutations constructive algorithms, dfs and similar, graphs	2800	x532
51F	Caterpillar dfs and similar, dp, graphs, trees	2800	x545
1863G	Swaps combinatorics, dp, graphs, math	2800	x568
1625E2	Cats on the Upgrade (hard version) binary search, data structures, dfs and similar, graphs, trees	2800	x580
1698F	Equal Reversal constructive algorithms, graphs, implementation, math	2800	x583
1033E	Hidden Bipartite Graph binary search, constructive algorithms, dfs and similar, graphs, interactive	2800	x583
1545C	AquaMoon and Permutations 2-sat, brute force, combinatorics, constructive algorithms, graph matchings, graphs	2800	x585
913F	Strongly Connected Tournament dp, graphs, math, probabilities	2800	x604
1383D	Rearrange brute force, constructive algorithms, graphs, greedy, sortings	2800	x640
360E	Levko and Game graphs, greedy, shortest paths	2800	x675
1491G	Switch and Flip constructive algorithms, graphs, math	2800	x727
600F	Edge coloring of bipartite graph graphs	2800	x735
325E	The Red Button combinatorics, dfs and similar, dsu, graphs, greedy	2800	x752
1672F2	Checker for Array Shuffling constructive algorithms, dfs and similar, graphs	2800	x773
830D	Singer House combinatorics, dp, graphs, trees	2800	x808
757F	Team Rocket Rises Again data structures, graphs, shortest paths	2800	x1066
1404E	Bricks flows, graph matchings, graphs	2800	x1095
280D	k-Maximum Subsequence Sum data structures, flows, graphs, implementation	2800	x1191
1375G	Tree Modification brute force, constructive algorithms, dfs and similar, graph matchings, graphs, trees	2800	x1647
555E	Case of Computer Network dfs and similar, graphs, trees	2800	x2196
613D	Kingdom and its Cities dfs and similar, divide and conquer, dp, graphs, sortings, trees	2800	x2692
44F	BerPaint geometry, graphs	2700	x64
1599I	Desert data structures, graphs	2700	x112
1156G	Optimizer graphs, greedy, hashing, implementation	2700	x120
982F	The Meeting Place Cannot Be Changed dfs and similar, graphs	2700	x182
42E	Baldman and the military dfs and similar, graphs, trees	2700	x189
1682F	MCMF? data structures, flows, graphs, greedy, sortings, two pointers	2700	x285
812D	Sagheer and Kindergarten dfs and similar, graphs, implementation, trees	2700	x326
81E	Pairs dfs and similar, dp, dsu, graphs, implementation, trees	2700	x327
191D	Metro Scheme graphs, greedy	2700	x346
1543E	The Final Pursuit bitmasks, constructive algorithms, divide and conquer, graphs, greedy, math	2700	x394
1695E	Ambiguous Dominoes constructive algorithms, dfs and similar, graphs	2700	x424
901D	Weighting a Tree constructive algorithms, dfs and similar, graphs	2700	x429
868E	Policeman and a Tree dp, graphs, trees	2700	x460
903G	Yet Another Maxflow Problem data structures, flows, graphs	2700	x509
132E	Bits of merry old England flows, graphs	2700	x521
933C	A Colourful Prospect geometry, graphs	2700	x550
1627F	Not Splitting geometry, graphs, greedy, implementation, shortest paths	2700	x553
1682E	Unordered Swaps constructive algorithms, dfs and similar, graphs, greedy, math, sortings, trees	2700	x561