Problemset - Codeforces

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Codeforces Round (Div. 2)
4 days
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Problems

#	Name
1671E	Preorder combinatorics, divide and conquer, dp, dsu, hashing, sortings, trees	2100	x2742
1671D	Insert a Progression brute force, constructive algorithms, greedy	1600	x7647
1671C	Dolce Vita binary search, brute force, greedy, math	1200	x17149
1671B	Consecutive Points Segment brute force, math, sortings	1000	x18518
1671A	String Building implementation	800	x20444
1670F	Jee, You See? bitmasks, combinatorics, dp	2400	x975
1670E	Hemose on the Tree bitmasks, constructive algorithms, dfs and similar, trees	2200	x1749
1670D	Very Suspicious binary search, brute force, geometry, greedy, implementation, math	1700	x5113
1670C	Where is the Pizza? data structures, dfs and similar, dsu, graphs, implementation, math	1400	x9941
1670B	Dorms War brute force, implementation, strings	1100	x12699
1670A	Prof. Slim greedy, implementation, sortings	800	x15421
1669H	Maximal AND bitmasks, greedy, math	1300	x18546
1669G	Fall Down dfs and similar, implementation	1200	x18253
1669F	Eating Candies binary search, data structures, greedy, two pointers	1100	x25746
1669E	2-Letter Strings data structures, math, strings	1200	x17860
1669D	Colorful Stamp implementation	1100	x22186
1669C	Odd/Even Increments greedy, greedy, implementation, math	800	x34644
1669B	Triple implementation, sortings	800	x43105
1669A	Division? implementation	800	x62796
1668B	Social Distance greedy, math, sortings	900	x16641
1668A	Direction Change implementation, math	800	x16299
1667F	Yin Yang implementation	3500	x99
1667E	Centroid Probabilities combinatorics, dp, fft, math	3000	x650
1667D	Edge Elimination constructive algorithms, dfs and similar, dp, trees	2900	x663
1667C	Half Queen Cover constructive algorithms, math	2400	x1579
1667B	Optimal Partition data structures, dp	2100	x3688
1667A	Make it Increasing brute force, greedy, math	1300	x14689
1666L	Labyrinth dfs and similar, graphs	1800	x3108
1666K	Kingdom Partition flows	3200	x244
1666J	Job Lookup constructive algorithms, dp, shortest paths, trees	2100	x1327
1666I	Interactive Treasure Hunt brute force, constructive algorithms, geometry, interactive, math	2200	x1446
1666H	Heroes of Might math	3500	x67
1666G	Global Warming geometry, math	3100	x136
1666F	Fancy Stack combinatorics, dp, implementation	2200	x1158
1666E	Even Split binary search, constructive algorithms, greedy, math	2500	x717
1666D	Deletive Editing greedy	900	x8475
1666C	Connect the Points brute force, constructive algorithms, geometry	1800	x3175
1666B	Budget Distribution	3300	x54
1666A	Admissible Map	3300	x110
1665E	MinimizOR bitmasks, brute force, data structures, divide and conquer, greedy, implementation, two pointers	2500	x1516
1665D	GCD Guess bitmasks, chinese remainder theorem, constructive algorithms, games, interactive, math, number theory	2000	x3923
1665C	Tree Infection binary search, greedy, sortings, trees	1600	x8362
1665B	Array Cloning Technique constructive algorithms, greedy, sortings	900	x20371
1665A	GCD vs LCM constructive algorithms, math	800	x23577
1663H	Cross-Language Program *special problem, constructive algorithms		x1283
1663G	Six Characters *special problem, constructive algorithms, strings		x211
1663F	In Every Generation... *special problem, strings		x346
1663E	Are You Safe? *special problem, implementation		x553
1663D	Is it rated - 3 *special problem, combinatorics, dp, math		x1412
1663C	Pōja Verdon *special problem, implementation, math		x5673
1663B	Mike's Sequence *special problem, divide and conquer, implementation, math		x3399
1663A	Who Tested? *special problem, expression parsing, trees		x10491
1662O	Circular Maze brute force, dfs and similar, graphs, implementation		x1351
1662N	Drone Photo combinatorics, math, sortings		x753
1662M	Bottle Arrangements constructive algorithms		x3450
1662L	Il Derby della Madonnina data structures, dp, math		x1063
1662K	Pandemic Restrictions geometry, ternary search		x334
1662J	Training Camp flows, graphs		x230
1662I	Ice Cream Shop brute force, implementation, sortings		x2113
1662H	Boundary brute force, math		x2969
1662G	Gastronomic Event dp, greedy, trees		x467
1662F	Antennas data structures, dfs and similar, graphs, graphs, implementation, implementation, shortest paths, shortest paths		x1032
1662E	Round Table math		x143
1662D	Evolution of Weasels greedy, implementation, strings		x1812
1662C	European Trip dp, graphs, math, matrices		x319
1662B	Toys greedy, strings		x136
1662A	Organizing SWERC brute force, implementation		x4333
1661F	Teleporters binary search, greedy	2600	x586
1661E	Narrow Components brute force, data structures, dp, dsu, math, trees	2500	x949
1661D	Progressions Covering data structures, greedy	1900	x4736
1661C	Water the Trees binary search, greedy, math	1700	x9321
1661B	Getting Zero bitmasks, brute force, dfs and similar, dp, graphs, greedy, shortest paths	1300	x17712
1661A	Array Balancing greedy, math	800	x18360
1660F2	Promising String (hard version) data structures, implementation, math, strings	2100	x2714
1660F1	Promising String (easy version) brute force, implementation, math, strings	1700	x7241
1660E	Matrix and Shifts brute force, constructive algorithms, greedy, implementation	1600	x7301
1660D	Maximum Product Strikes Back brute force, implementation, math, two pointers	1600	x8650
1660C	Get an Even String dp, greedy, strings	1300	x19542
1660B	Vlad and Candies math	800	x28065
1660A	Vasya and Coins greedy, math	800	x35937
1659F	Tree and Permutation Game dfs and similar, games, graphs, trees	3000	x191
1659E	AND-MEX Walk bitmasks, brute force, constructive algorithms, dfs and similar, dsu, graphs	2200	x1554
1659D	Reverse Sort Sum constructive algorithms, data structures, greedy, implementation, math, two pointers	1900	x4008
1659C	Line Empire binary search, brute force, dp, greedy, implementation, math	1500	x10478
1659B	Bit Flipping bitmasks, constructive algorithms, greedy, strings	1300	x10926
1659A	Red Versus Blue constructive algorithms, greedy, implementation, math	1000	x18660
1658F	Juju and Binary String brute force, constructive algorithms, greedy, math	2700	x768
1658E	Gojou and Matrix Game data structures, dp, games, hashing, implementation, math, number theory, sortings	2500	x1046
1658D2	388535 (Hard Version) bitmasks, brute force, data structures, math	2300	x2538
1658D1	388535 (Easy Version) bitmasks, math	1600	x9062
1658C	Shinju and the Lost Permutation constructive algorithms, math	1700	x9319
1658B	Marin and Anti-coprime Permutation combinatorics, math, number theory	800	x18582
1658A	Marin and Photoshoot constructive algorithms, implementation, math	800	x20310
1657F	Words on Tree 2-sat, dfs and similar, dsu, graphs, trees	2600	x574
1657E	Star MST combinatorics, dp, graph matchings, math	2200	x2080
1657D	For Gamers. By Gamers. binary search, brute force, greedy, math, sortings	2000	x4850
1657C	Bracket Sequence Deletion greedy, implementation	1200	x16799
1657B	XY Sequence greedy	800	x22787
1657A	Integer Moves brute force, math	800	x23966
1656I	Neighbour Ordering constructive algorithms, graphs	3500	x104