Problemset - Codeforces

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Codeforces Round (Div. 2)
7 days

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Problems

#	Name
1790D	Matryoshkas data structures, greedy, sortings	1200	x20224
1790C	Premutation brute force, implementation, math	1000	x23859
1790B	Taisia and Dice greedy, greedy, math	800	x27391
1790A	Polycarp and the Day of Pi implementation, math, strings	800	x37030
1789F	Serval and Brain Power bitmasks, brute force, dp, greedy, implementation, strings	2700	x716
1789E	Serval and Music Game brute force, dp, implementation, math, number theory	2500	x818
1789D	Serval and Shift-Shift-Shift bitmasks, brute force, constructive algorithms, implementation	2200	x1677
1789C	Serval and Toxel's Arrays combinatorics, dp, implementation, math	1500	x8568
1789B	Serval and Inversion Magic brute force, implementation, strings, two pointers	800	x16213
1789A	Serval and Mocha's Array brute force, math, number theory	800	x19118
1788F	XOR, Tree, and Queries bitmasks, constructive algorithms, dfs and similar, dsu, graphs, greedy, implementation, trees	2500	x843
1788E	Sum Over Zero data structures, dfs and similar, dp	2200	x2674
1788D	Moving Dots binary search, brute force, combinatorics, math, two pointers	2000	x3914
1788C	Matching Numbers constructive algorithms, greedy, math	1300	x17230
1788B	Sum of Two Numbers constructive algorithms, greedy, implementation, math, probabilities	1100	x20037
1788A	One and Two brute force, implementation, math	800	x30765
1787I	Treasure Hunt data structures, divide and conquer, two pointers	3400	x218
1787H	Codeforces Scoreboard binary search, data structures, dp, geometry	3300	x232
1787G	Colorful Tree Again brute force, data structures, trees	3000	x435
1787F	Inverse Transformation constructive algorithms, implementation, math	2500	x685
1787E	The Harmonization of XOR bitmasks, constructive algorithms, greedy, math	2100	x2347
1787D	Game on Axis combinatorics, dfs and similar, dsu, graphs, implementation	1900	x3398
1787C	Remove the Bracket dp, greedy, math	1600	x7084
1787B	Number Factorization greedy, math, number theory	1100	x13264
1787A	Exponential Equation constructive algorithms, math	800	x19206
1786B	Cake Assembly Line brute force, sortings	1300	x8971
1786A2	Alternating Deck (hard version) implementation	800	x11415
1786A1	Non-alternating Deck (easy version) implementation	800	x14046
1784F	Minimums or Medians	3400	x235
1784E	Infinite Game brute force, combinatorics, dp, games, probabilities	3100	x338
1784D	Wooden Spoon combinatorics, dp	2400	x1024
1784C	Monsters (hard version) data structures, greedy	2200	x1655
1784B	Letter Exchange constructive algorithms	1900	x3335
1784A	Monsters (easy version) brute force, greedy	1000	x15140
1783G	Weighed Tree Radius data structures, divide and conquer, implementation, trees	2800	x478
1783F	Double Sort II dfs and similar, flows, graph matchings, graphs	2500	x1018
1783E	Game of the Year brute force, data structures, math, number theory	2300	x2109
1783D	Different Arrays brute force, dp, implementation	2000	x4437
1783C	Yet Another Tournament binary search, greedy, sortings	1700	x9304
1783B	Matrix of Differences constructive algorithms, math	1100	x17777
1783A	Make it Beautiful constructive algorithms, math, sortings	800	x30246
1781H2	Window Signals (hard version)	3500	x91
1781H1	Window Signals (easy version)	3200	x116
1781G	Diverse Coloring constructive algorithms, trees	3200	x222
1781F	Bracket Insertion combinatorics, dp, math, trees	2700	x865
1781E	Rectangle Shrinking binary search, brute force, data structures, greedy, implementation, two pointers	2300	x1304
1781D	Many Perfect Squares brute force, math, number theory	1800	x5500
1781C	Equal Frequencies brute force, constructive algorithms, greedy, implementation, sortings, strings	1600	x7602
1781B	Going to the Cinema brute force, greedy, sortings	1000	x13525
1781A	Parallel Projection geometry, math	800	x15071
1780G	Delicious Dessert binary search, dsu, hashing, math, number theory, string suffix structures	2400	x740
1780F	Three Chairs bitmasks, brute force, combinatorics, data structures, dp, number theory, sortings	2300	x1478
1780E	Josuke and Complete Graph binary search, brute force, data structures, math, number theory	2400	x1437
1780D	Bit Guessing Game binary search, bitmasks, constructive algorithms, interactive	1800	x4949
1780B	GCD Partition brute force, greedy, math, number theory	1100	x18103
1780A	Hayato and School constructive algorithms, greedy	800	x21696
1779H	Olympic Team Building brute force, meet-in-the-middle	3500	x142
1779G	The Game of the Century constructive algorithms, graphs, shortest paths	3000	x320
1779F	Xorcerer's Stones bitmasks, constructive algorithms, dp, trees	2500	x1261
1779E	Anya's Simultaneous Exhibition constructive algorithms, graphs, greedy, interactive, sortings	2400	x1760
1779D	Boris and His Amazing Haircut constructive algorithms, data structures, dp, dsu, greedy, sortings	1700	x7920
1779C	Least Prefix Sum data structures, greedy	1600	x12394
1779B	MKnez's ConstructiveForces Task constructive algorithms, math	900	x23602
1779A	Hall of Fame constructive algorithms, greedy, strings	800	x23152
1778F	Maximizing Root dfs and similar, dp, graphs, math, number theory, trees	2600	x660
1778E	The Tree Has Fallen! bitmasks, dfs and similar, math, trees	2500	x878
1778D	Flexible String Revisit combinatorics, dp, math, probabilities	2100	x2769
1778C	Flexible String bitmasks, brute force, strings	1600	x8227
1778B	The Forbidden Permutation greedy, math	1300	x13302
1778A	Flip Flop Sum greedy, implementation	800	x24335
1777F	Comfortably Numb bitmasks, data structures, divide and conquer, strings, trees	2400	x937
1777E	Edge Reverse binary search, dfs and similar, graphs, trees	2200	x1856
1777D	Score of a Tree bitmasks, combinatorics, dfs and similar, dp, math, probabilities, trees	1900	x3488
1777C	Quiz Master binary search, math, number theory, sortings, two pointers	1700	x8550
1777B	Emordnilap combinatorics, greedy, math	900	x17499
1777A	Everybody Likes Good Arrays! greedy, math	800	x24423
1776N	Count Permutations math	3500	x82
1776M	Parmigiana With Seafood binary search, dp, greedy, trees	3000	x372
1776L	Controllers binary search, math	1500	x6031
1776K	Uniform Chemistry dp, math	3200	x68
1776J	Italian Data Centers graphs, shortest paths	2500	x681
1776I	Spinach Pizza games, geometry, greedy, interactive	2500	x677
1776H	Beppa and SwerChat two pointers	1300	x6401
1776G	Another Wine Tasting Event combinatorics, constructive algorithms, math, strings	2100	x2048
1776F	Train Splitting constructive algorithms, graphs, greedy	1700	x3453
1776E	Crossing the Railways data structures, dp	3500	x70
1776D	Teamwork constructive algorithms, greedy, math	2800	x363
1776C	Library game games, greedy, interactive, sortings	2500	x798
1776B	Vittorio Plays with LEGO Bricks dp, geometry	2200	x1325
1776A	Walking Boy greedy	800	x6980
1775F	Laboratory on Pluto constructive algorithms, dp, greedy, math	2500	x763
1775E	The Human Equation greedy, implementation	2100	x3202
1775D	Friendly Spiders dfs and similar, graphs, math, number theory, shortest paths	1800	x6273
1775C	Interesting Sequence bitmasks, math	1600	x10463
1775B	Gardener and the Array bitmasks, constructive algorithms	1300	x13894
1775A2	Gardener and the Capybaras (hard version) constructive algorithms, greedy	900	x18737
1775A1	Gardener and the Capybaras (easy version) brute force, constructive algorithms, implementation	800	x19651
1774H	Maximum Permutation constructive algorithms	3500	x134
1774G	Segment Covering brute force, combinatorics, constructive algorithms, data structures, dp, trees	3200	x438
1774F2	Magician and Pigs (Hard Version) binary search, brute force, data structures, implementation	2700	x680