Problemset - Codeforces

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Educational Codeforces Round 173 (Rated for Div. 2)
11:24:17
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Problems

#	Name
1696F	Tree Recovery brute force, constructive algorithms, dfs and similar, dsu, graphs, trees	2600	x950
1696E	Placing Jinas combinatorics, math	2000	x4163
1696D	Permutation Graph binary search, constructive algorithms, data structures, divide and conquer, greedy, shortest paths	1900	x5536
1696C	Fishingprince Plays With Array constructive algorithms, greedy, implementation, math	1400	x11781
1696B	NIT Destroys the Universe greedy	900	x22366
1696A	NIT orz! bitmasks, greedy	800	x18997
1695E	Ambiguous Dominoes constructive algorithms, dfs and similar, graphs	2700	x454
1695D2	Tree Queries (Hard Version) constructive algorithms, dfs and similar, dp, greedy, trees	2300	x2043
1695D1	Tree Queries (Easy Version) brute force, constructive algorithms, dfs and similar, dp, greedy, trees	2200	x2210
1695C	Zero Path brute force, data structures, dp, graphs, greedy, shortest paths	1700	x11121
1695B	Circle Game games, greedy	1000	x18681
1695A	Subrectangle Guess games	800	x16423
1694B	Paranoid String constructive algorithms, greedy	1200	x19385
1694A	Creep greedy, implementation	800	x22831
1693F	I Might Be Wrong binary search, greedy, two pointers	3400	x424
1693E	Outermost Maximums data structures, greedy	3400	x434
1693D	Decinc Dividing brute force, data structures, divide and conquer, dp, greedy	2800	x861
1693C	Keshi in Search of AmShZ graphs, greedy, shortest paths	2300	x2680
1693B	Fake Plastic Trees dfs and similar, dp, greedy, trees	1700	x8651
1693A	Directional Increase greedy	1300	x16354
1692H	Gambling data structures, dp, greedy, math	1700	x7640
1692G	2^Sort data structures, dp, sortings, two pointers	1400	x18477
1692F	3SUM brute force, math	1300	x23362
1692E	Binary Deque binary search, implementation, two pointers	1200	x23001
1692D	The Clock brute force, implementation	1100	x19752
1692C	Where's the Bishop? implementation	800	x34880
1692B	All Distinct greedy, sortings	800	x34835
1692A	Marathon implementation	800	x67796
1691F	K-Set Tree combinatorics, dfs and similar, dp, math, trees	2500	x1005
1691E	Number of Groups data structures, dfs and similar, dsu, graphs, greedy, sortings	2300	x1864
1691D	Max GEQ Sum binary search, constructive algorithms, data structures, divide and conquer, implementation, two pointers	1800	x5917
1691C	Sum of Substrings brute force, constructive algorithms, greedy, math, strings	1400	x15864
1691B	Shoe Shuffling constructive algorithms, greedy, implementation, two pointers	1000	x23898
1691A	Beat The Odds brute force, greedy, math	800	x30773
1690G	Count the Trains binary search, data structures, greedy, sortings	2000	x3465
1690F	Shifting String graphs, math, number theory, strings	1700	x7289
1690E	Price Maximization binary search, greedy, math, two pointers	1500	x15436
1690D	Black and White Stripe implementation, two pointers	1000	x31106
1690C	Restoring the Duration of Tasks data structures, greedy, implementation	800	x26411
1690B	Array Decrements greedy, implementation	800	x25747
1690A	Print a Pedestal (Codeforces logo?) constructive algorithms, greedy	800	x33868
1689E	ANDfinity bitmasks, brute force, constructive algorithms, dfs and similar, dsu, graphs	2500	x1238
1689D	Lena and Matrix data structures, dp, geometry, shortest paths	1900	x4271
1689C	Infected Tree dfs and similar, dp, trees	1600	x11467
1689B	Mystic Permutation data structures, greedy	900	x17724
1689A	Lex String brute force, greedy, implementation, sortings, two pointers	800	x16874
1688C	Manipulating History constructive algorithms, greedy, strings	1700	x8226
1688B	Patchouli's Magical Talisman bitmasks, constructive algorithms, greedy, sortings	800	x18376
1688A	Cirno's Perfect Bitmasks Classroom bitmasks, brute force	800	x21895
1687F	Koishi's Unconscious Permutation fft, math	3500	x87
1687E	Become Big For Me combinatorics, constructive algorithms, greedy, math, number theory	3500	x235
1687D	Cute number binary search, brute force, data structures, dsu, implementation, math	2900	x615
1687C	Sanae and Giant Robot binary search, brute force, data structures, dsu, greedy, sortings	2500	x1443
1687B	Railway System constructive algorithms, graphs, greedy, interactive, sortings	1700	x3708
1687A	The Enchanted Forest brute force, greedy	1600	x10511
1686B	Odd Subarrays dp, greedy	800	x18414
1686A	Everything Everywhere All But One greedy	800	x20554
1685E	The Ultimate LIS Problem data structures, greedy	3500	x154
1685D2	Permutation Weight (Hard Version) constructive algorithms, greedy	3500	x108
1685D1	Permutation Weight (Easy Version) constructive algorithms, dfs and similar, dsu	2800	x451
1685C	Bring Balance brute force, constructive algorithms, greedy	2600	x1103
1685B	Linguistics greedy, implementation, sortings, strings	2000	x3315
1685A	Circular Local MiniMax constructive algorithms, greedy, sortings	1100	x17349
1684H	Hard Cut constructive algorithms, dfs and similar, divide and conquer, math	3400	x245
1684G	Euclid Guess constructive algorithms, flows, graph matchings, math, number theory	2800	x622
1684F	Diverse Segments data structures, two pointers	2600	x928
1684E	MEX vs DIFF binary search, brute force, constructive algorithms, data structures, greedy, two pointers	2100	x3214
1684D	Traps constructive algorithms, greedy, sortings	1700	x9859
1684C	Column Swapping brute force, constructive algorithms, greedy, implementation, sortings	1400	x12466
1684B	Z mod X = C constructive algorithms, math	800	x21116
1684A	Digit Minimization constructive algorithms, games, math, strings	800	x24053
1682F	MCMF? data structures, flows, graphs, greedy, sortings, two pointers	2700	x320
1682E	Unordered Swaps constructive algorithms, dfs and similar, graphs, greedy, math, sortings, trees	2700	x626
1682D	Circular Spanning Tree constructive algorithms, implementation, trees	2000	x3362
1682C	LIS or Reverse LIS? constructive algorithms, greedy, implementation, math	1400	x15009
1682B	AND Sorting bitmasks, constructive algorithms, sortings	1100	x19127
1682A	Palindromic Indices greedy, strings	800	x19363
1681F	Unique Occurrences data structures, dfs and similar, divide and conquer, dp, dsu, trees	2300	x1823
1681E	Labyrinth Adventures data structures, dp, matrices, shortest paths	2600	x806
1681D	Required Length brute force, dfs and similar, dp, hashing, shortest paths	1700	x9797
1681C	Double Sort implementation, sortings	1200	x17569
1681B	Card Trick implementation, math	800	x20231
1681A	Game with Cards games, greedy	800	x21083
1680F	Lenient Vertex Cover dfs and similar, divide and conquer, dsu, graphs, trees	2600	x683
1680E	Moving Chips bitmasks, dp, greedy	2000	x3848
1680D	Dog Walking brute force, greedy, math	2400	x1190
1680C	Binary String binary search, greedy, strings, two pointers	1600	x10106
1680B	Robots implementation	800	x18502
1680A	Minimums and Maximums brute force, math	800	x21700
1679F	Formalism for Formalism bitmasks, dp, math	2600	x578
1679E	Typical Party in Dorm bitmasks, combinatorics, dp, strings	2400	x1216
1679D	Toss a Coin to Your Graph... binary search, dfs and similar, dp, graphs	1900	x4980
1679C	Rooks Defenders data structures, implementation	1400	x10509
1679B	Stone Age Problem data structures, implementation	1200	x19182
1679A	AvtoBus brute force, greedy, math, number theory	900	x25327
1678B2	Tokitsukaze and Good 01-String (hard version) dp, greedy, implementation	1800	x6694
1678B1	Tokitsukaze and Good 01-String (easy version) implementation	800	x16013
1678A	Tokitsukaze and All Zero Sequence implementation	800	x18300
1677F	Tokitsukaze and Gems dp, math	3500	x94
1677E	Tokitsukaze and Beautiful Subsegments data structures	2900	x577