Problemset - Codeforces

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Codeforces Round (Div. 2)
7 days

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Problems

#	Name
1844D	Row Major constructive algorithms, greedy, math, number theory, strings	1400	x12290
1844C	Particles dp, greedy, implementation, math	1300	x15662
1843F1	Omsk Metro (simple version) data structures, dfs and similar, dp, graphs, greedy, math, trees	1800	x5310
1843E	Tracking Segments binary search, brute force, data structures, two pointers	1600	x12337
1842D	Tenzing and His Animal Friends constructive algorithms, graphs, greedy	1900	x4082
1842C	Tenzing and Balls dp	1500	x12804
1841C	Ranom Numbers brute force, dp, greedy, math, strings	1800	x7822
1840E	Character Blocking data structures, hashing, implementation	1600	x8045
1840D	Wooden Toy Festival binary search, greedy, sortings	1400	x13756
1839C	Insert Zero and Invert Prefix constructive algorithms	1300	x11972
1838C	No Prime Differences constructive algorithms, math, number theory	1400	x14466
1837D	Bracket Coloring constructive algorithms, greedy	1400	x14760
1835A	k-th equality brute force, implementation, math	1700	x7820
1834D	Survey in Class brute force, data structures, greedy, implementation, sortings	1900	x4663
1833G	Ksyusha and Chinchilla constructive algorithms, dfs and similar, dp, dsu, greedy, implementation, trees	1800	x5376
1833F	Ira and Flamenco combinatorics, constructive algorithms, data structures, implementation, math, sortings, two pointers	1700	x7362
1833E	Round Dance dfs and similar, dsu, graphs, shortest paths	1600	x11763
1833D	Flipper brute force, constructive algorithms, greedy	1400	x13326
1830A	Copil Copac Draws Trees dfs and similar, dp, graphs, trees	1400	x13551
1829H	Don't Blame Me bitmasks, combinatorics, dp, math	1700	x7746
1829G	Hits Different data structures, dp, implementation, math	1600	x10443
1829F	Forever Winter dfs and similar, graphs, math	1300	x17548
1826D	Running Miles brute force, dp, greedy	1700	x9801
1826C	Dreaming of Freedom greedy, math, number theory	1300	x13574
1824B1	LuoTianyi and the Floating Islands (Easy Version) combinatorics, math, probabilities, trees	1800	x4586
1824A	LuoTianyi and the Show greedy, implementation	1400	x11306
1823D	Unique Palindromes constructive algorithms, math, strings	1900	x3832
1823C	Strongly Composite greedy, math, number theory	1300	x12288
1822G1	Magic Triples (Easy Version) brute force, data structures, math, number theory	1700	x7051
1822F	Gardening Friends brute force, dfs and similar, dp, graphs, trees	1700	x6140
1822E	Making Anti-Palindromes greedy, math, strings	1600	x10443
1821D	Black Cells binary search, brute force, greedy, math	1900	x4966
1821C	Tear It Apart brute force, implementation, math, strings	1300	x14286
1819B	The Butcher geometry, greedy, implementation, sortings, two pointers	1900	x3586
1819A	Constructive Problem brute force, greedy	1300	x12682
1817B	Fish Graph brute force, constructive algorithms, dfs and similar, graphs	1900	x4136
1817A	Almost Increasing Subsequence binary search, data structures, greedy	1500	x11014
1815A	Ian and Array Sorting greedy, math	1300	x14113
1814C	Search in Parallel constructive algorithms, greedy, sortings	1500	x10807
1814B	Long Legs brute force, math	1700	x10009
1811E	Living Sequence binary search, dp, math, number theory	1500	x12320
1811D	Umka and a Long Flight constructive algorithms, implementation, math	1600	x7496
1810D	Climbing the Tree binary search, math	1700	x7441
1810C	Make It Permutation brute force, greedy, sortings	1300	x14504
1809D	Binary String Sorting constructive algorithms, greedy	1800	x6296
1809C	Sum on Subarrays constructive algorithms, greedy, math	1500	x12777
1808C	Unlucky Numbers brute force, dp, greedy, implementation	1900	x3792
1807F	Bouncy Ball brute force, dfs and similar, implementation	1700	x6297
1807E	Interview binary search, implementation, interactive	1300	x12987
1806C	Sequence Master brute force, constructive algorithms, math	1600	x7613
1805D	A Wide, Wide Graph dfs and similar, dp, graphs, greedy, trees	1800	x6562
1805C	Place for a Selfie binary search, data structures, geometry, math	1400	x12565
1804C	Pull Your Luck brute force, greedy, math, number theory	1500	x12131
1801C	Music Festival binary search, data structures, dp, greedy, sortings	1900	x3437
1801B	Buying gifts data structures, greedy, sortings	1800	x6238
1801A	The Very Beautiful Blanket bitmasks, constructive algorithms	1600	x8569
1800F	Dasha and Nightmares bitmasks, hashing, meet-in-the-middle, strings	1900	x3890
1800E2	Unforgivable Curse (hard version) brute force, constructive algorithms, dfs and similar, dsu, graphs, greedy, strings	1500	x12820
1800E1	Unforgivable Curse (easy version) brute force, constructive algorithms, dsu, graphs, greedy, strings	1400	x12825
1799D1	Hot Start Up (easy version) dp	1900	x4467
1799C	Double Lexicographically Minimum greedy, strings	1700	x5817
1798D	Shocking Arrangement constructive algorithms, greedy, math	1600	x9867
1798C	Candy Store greedy, math, number theory	1700	x8193
1797D	Li Hua and Tree brute force, data structures, dfs and similar, dp, implementation, trees	1900	x3956
1797C	Li Hua and Chess constructive algorithms, greedy, interactive	1600	x7633
1796C	Maximum Set binary search, math	1600	x10416
1795D	Triangle Coloring combinatorics, math	1600	x9144
1795C	Tea Tasting binary search, data structures, implementation	1500	x12446
1794D	Counting Factorizations combinatorics, divide and conquer, dp, math, number theory	1900	x3589
1794C	Scoring Subsequences binary search, greedy, math, two pointers	1300	x13831
1793D	Moscow Gorillas binary search, dp, greedy, implementation, math, two pointers	1800	x6137
1792D	Fixed Prefix Permutations binary search, bitmasks, data structures, hashing, math, sortings	1700	x6261
1792C	Min Max Sort binary search, brute force, greedy, math, two pointers	1500	x14115
1791G2	Teleporters (Hard Version) binary search, greedy, sortings	1900	x4789
1791F	Range Update Point Query binary search, brute force, data structures	1500	x12424
1790E	Vlad and a Pair of Numbers bitmasks, constructive algorithms	1400	x15125
1789C	Serval and Toxel's Arrays combinatorics, dp, implementation, math	1500	x8567
1788C	Matching Numbers constructive algorithms, greedy, math	1300	x17228
1787D	Game on Axis combinatorics, dfs and similar, dsu, graphs, implementation	1900	x3398
1787C	Remove the Bracket dp, greedy, math	1600	x7083
1786B	Cake Assembly Line brute force, sortings	1300	x8970
1784B	Letter Exchange constructive algorithms	1900	x3335
1783C	Yet Another Tournament binary search, greedy, sortings	1700	x9299
1781D	Many Perfect Squares brute force, math, number theory	1800	x5499
1781C	Equal Frequencies brute force, constructive algorithms, greedy, implementation, sortings, strings	1600	x7601
1780D	Bit Guessing Game binary search, bitmasks, constructive algorithms, interactive	1800	x4945
1779D	Boris and His Amazing Haircut constructive algorithms, data structures, dp, dsu, greedy, sortings	1700	x7916
1779C	Least Prefix Sum data structures, greedy	1600	x12389
1778C	Flexible String bitmasks, brute force, strings	1600	x8226
1778B	The Forbidden Permutation greedy, math	1300	x13301
1777D	Score of a Tree bitmasks, combinatorics, dfs and similar, dp, math, probabilities, trees	1900	x3485
1777C	Quiz Master binary search, math, number theory, sortings, two pointers	1700	x8544
1776L	Controllers binary search, math	1500	x6028
1776H	Beppa and SwerChat two pointers	1300	x6401
1776F	Train Splitting constructive algorithms, graphs, greedy	1700	x3453
1775D	Friendly Spiders dfs and similar, graphs, math, number theory, shortest paths	1800	x6272
1775C	Interesting Sequence bitmasks, math	1600	x10460
1775B	Gardener and the Array bitmasks, constructive algorithms	1300	x13893
1774E	Two Chess Pieces dfs and similar, dp, greedy, trees	1900	x3481
1774D	Same Count One brute force, constructive algorithms, greedy, implementation, two pointers	1600	x7863