Problemset - Codeforces

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Educational Codeforces Round 165 (Rated for Div. 2)
35:08:09
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Problems

#	Name
609E	Minimum spanning tree for each edge data structures, dfs and similar, dsu, graphs, trees	2100	x6910
195E	Building Forest data structures, dsu, graphs	2000	x686
433D	Nanami's Digital Board dsu, implementation	2000	x1036
366D	Dima and Trap Graph binary search, data structures, dfs and similar, dsu, shortest paths, two pointers	2000	x1270
187C	Weak Memory dfs and similar, dsu	2000	x1297
659F	Polycarp and Hay dfs and similar, dsu, graphs, greedy, sortings	2000	x1748
1619G	Unusual Minesweeper binary search, dfs and similar, dsu, greedy, sortings	2000	x2259
899E	Segments Removal data structures, dsu, flows, implementation, two pointers	2000	x2734
400D	Dima and Bacteria dsu, graphs, shortest paths	2000	x2795
1209G1	Into Blocks (easy version) data structures, dsu, greedy, implementation, two pointers	2000	x2860
1851G	Vlad and the Mountains binary search, data structures, dsu, graphs, implementation, sortings, trees, two pointers	2000	x2905
1131D	Gourmet choice dfs and similar, dp, dsu, graphs, greedy	2000	x3028
1923E	Count Paths data structures, dfs and similar, dp, dsu, graphs, trees	2000	x3118
766D	Mahmoud and a Dictionary data structures, dfs and similar, dp, dsu, graphs	2000	x3260
1726D	Edge Split brute force, constructive algorithms, dfs and similar, dsu, graphs, probabilities, trees	2000	x3535
1827B1	Range Sorting (Easy Version) binary search, dp, dsu, greedy, trees, two pointers	2000	x3646
1770D	Koxia and Game constructive algorithms, data structures, dfs and similar, dsu, flows, games, graph matchings, graphs, implementation	2000	x3656
468B	Two Sets 2-sat, dfs and similar, dsu, graph matchings, greedy	2000	x3810
1857G	Counting Graphs combinatorics, divide and conquer, dsu, graphs, greedy, sortings, trees	2000	x4052
776D	The Door Problem 2-sat, dfs and similar, dsu, graphs	2000	x4780
1513D	GCD and MST constructive algorithms, dsu, graphs, greedy, number theory, sortings	2000	x5022
1344B	Monopole Magnets constructive algorithms, dfs and similar, dsu, graphs	2000	x5772
920F	SUM and REPLACE brute force, data structures, dsu, number theory	2000	x6195
1370D	Odd-Even Subsequence binary search, dp, dsu, greedy, implementation	2000	x9113
982D	Shark brute force, data structures, dsu, trees	1900	x2244
292D	Connected Components data structures, dfs and similar, dp, dsu	1900	x2304
228E	The Road to Berland is Paved With Good Intentions 2-sat, dfs and similar, dsu, graphs	1900	x2333
1899G	Unusual Entertainment data structures, dfs and similar, dsu, shortest paths, sortings, trees, two pointers	1900	x2891
6E	Exposition binary search, data structures, dsu, trees, two pointers	1900	x2989
566D	Restructuring Company data structures, dsu	1900	x3088
1133F2	Spanning Tree with One Fixed Degree constructive algorithms, dfs and similar, dsu, graphs, greedy	1900	x3104
437D	The Child and Zoo dsu, sortings	1900	x3132
109C	Lucky Tree dp, dsu, trees	1900	x3184
1787D	Game on Axis combinatorics, dfs and similar, dsu, graphs, implementation	1900	x3254
1738D	Permutation Addicts constructive algorithms, data structures, dfs and similar, dsu, graphs, trees	1900	x3312
1847D	Professor Higashikata data structures, dsu, greedy, implementation, strings	1900	x3589
1012B	Chemical table constructive algorithms, dfs and similar, dsu, graphs, matrices	1900	x3647
1927F	Microcycle data structures, dfs and similar, dsu, graphs, greedy, implementation, sortings, trees	1900	x3694
1482D	Playlist data structures, dsu, implementation, shortest paths	1900	x3727
817D	Imbalanced Array data structures, divide and conquer, dsu, sortings	1900	x4383
1276B	Two Fairs combinatorics, dfs and similar, dsu, graphs	1900	x4663
472D	Design Tutorial: Inverse the Problem dfs and similar, dsu, shortest paths, trees	1900	x4990
1920D	Array Repetition binary search, brute force, dsu, implementation, math	1900	x5056
1922D	Berserk Monsters brute force, data structures, dsu, implementation, math	1900	x5155
1624G	MinOr Tree bitmasks, dfs and similar, dsu, graphs, greedy	1900	x5517
1095F	Make It Connected dsu, graphs, greedy	1900	x5830
1245D	Shichikuji and Power Grid dsu, graphs, greedy, shortest paths, trees	1900	x6870
1242B	0-1 MST dfs and similar, dsu, graphs, sortings	1900	x6954
1620E	Replace the Numbers constructive algorithms, data structures, dsu, implementation	1900	x7738
547B	Mike and Feet binary search, data structures, dp, dsu	1900	x8193
25D	Roads not only in Berland dsu, graphs, trees	1900	x10307
1402A	Fancy Fence *special problem, data structures, dsu, implementation, math, sortings	1800	x1135
603B	Moodular Arithmetic combinatorics, dfs and similar, dsu, math, number theory	1800	x2533
436C	Dungeons and Candies dsu, graphs, greedy, trees	1800	x2578
1081D	Maximum Distance dsu, graphs, shortest paths, sortings	1800	x3875
1468J	Road Reform dsu, graphs, greedy	1800	x3888
1442B	Identify the Operations combinatorics, data structures, dsu, greedy, implementation	1800	x4297
1833G	Ksyusha and Chinchilla constructive algorithms, dfs and similar, dp, dsu, greedy, implementation, trees	1800	x4912
371D	Vessels data structures, dsu, implementation, trees	1800	x5303
1872F	Selling a Menagerie dfs and similar, dsu, graphs, implementation, math	1800	x5758
1859D	Andrey and Escape from Capygrad binary search, data structures, dp, dsu, greedy, sortings	1800	x6512
1213G	Path Queries divide and conquer, dsu, graphs, sortings, trees	1800	x6595
1845D	Rating System binary search, brute force, data structures, dp, dsu, greedy, math, two pointers	1800	x7287
765D	Artsem and Saunders constructive algorithms, dsu, math	1700	x2441
670E	Correct Bracket Sequence Editor data structures, dsu, strings	1700	x3139
691D	Swaps in Permutation dfs and similar, dsu, math	1700	x5281
698B	Fix a Tree constructive algorithms, dfs and similar, dsu, graphs, trees	1700	x5605
1131F	Asya And Kittens constructive algorithms, dsu	1700	x6259
1873H	Mad City dfs and similar, dsu, games, graphs, shortest paths, trees	1700	x6524
1594D	The Number of Imposters constructive algorithms, dfs and similar, dp, dsu, graphs	1700	x7073
1850H	The Third Letter dfs and similar, dsu, graphs, greedy, implementation	1700	x7455
1779D	Boris and His Amazing Haircut constructive algorithms, data structures, dp, dsu, greedy, sortings	1700	x7469
1411C	Peaceful Rooks dfs and similar, dsu, graphs	1700	x7756
1476D	Journey dfs and similar, dp, dsu, implementation	1700	x8377
1209D	Cow and Snacks dfs and similar, dsu, graphs	1700	x8796
1253D	Harmonious Graph constructive algorithms, dfs and similar, dsu, graphs, greedy, sortings	1700	x8821
1383A	String Transformation 1 dsu, graphs, greedy, sortings, strings, trees, two pointers	1700	x10227
1176E	Cover it! dfs and similar, dsu, graphs, shortest paths, trees	1700	x10412
1365D	Solve The Maze constructive algorithms, dfs and similar, dsu, graphs, greedy, implementation, shortest paths	1700	x16093
28B	pSort dfs and similar, dsu, graphs	1600	x4392
741B	Arpa's weak amphitheater and Mehrdad's valuable Hoses dfs and similar, dp, dsu	1600	x5136
731C	Socks dfs and similar, dsu, graphs, greedy	1600	x6778
723D	Lakes in Berland dfs and similar, dsu, graphs, greedy, implementation	1600	x6802
1609D	Social Network dsu, graphs, greedy, implementation, trees	1600	x6902
939D	Love Rescue dfs and similar, dsu, graphs, greedy, strings	1600	x7101
659E	New Reform data structures, dfs and similar, dsu, graphs, greedy	1600	x7297
500B	New Year Permutation dfs and similar, dsu, graphs, greedy, math, sortings	1600	x8683
722C	Destroying Array data structures, dsu	1600	x8810
763A	Timofey and a tree dfs and similar, dp, dsu, graphs, implementation, trees	1600	x10085
1833E	Round Dance dfs and similar, dsu, graphs, shortest paths	1600	x10201
1702E	Split Into Two Sets dfs and similar, dsu, graphs	1600	x12268
177C2	Party brute force, dfs and similar, dsu, graphs	1500	x2426
177C1	Party dfs and similar, dsu, graphs	1500	x2441
1575J	Jeopardy of Dropped Balls binary search, brute force, dsu, implementation	1500	x3639
17B	Hierarchy dfs and similar, dsu, greedy, shortest paths	1500	x4458
875B	Sorting the Coins dsu, implementation, sortings, two pointers	1500	x5114
490B	Queue dsu, implementation	1500	x5896
103B	Cthulhu dfs and similar, dsu, graphs	1500	x8511
409H	A + B Strikes Back *special problem, brute force, constructive algorithms, dsu, implementation	1500	x8656
1675E	Replace With the Previous, Minimize dsu, greedy, strings	1500	x10065