Problemset - Codeforces

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Codeforces Round (Div. 4)
7 days

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Problems

#	Name
660D	Number of Parallelograms geometry	1900	x4091
660C	Hard Process binary search, dp, two pointers	1600	x9687
659G	Fence Divercity combinatorics, dp, number theory	2300	x1231
659F	Polycarp and Hay dfs and similar, dsu, graphs, greedy, sortings	2000	x1834
659E	New Reform data structures, dfs and similar, dsu, graphs, greedy	1600	x7551
659D	Bicycle Race geometry, implementation, math	1500	x6374
656G	You're a Professional *special problem	1900	x487
656F	Ace It! *special problem	1900	x916
656E	Out of Controls *special problem	2000	x730
656D	Rosetta Problem *special problem	2100	x962
656C	Without Text *special problem	2000	x697
656B	Scrambled *special problem, implementation	1700	x1659
656A	Da Vinci Powers *special problem	1900	x3643
653G	Move by Prime combinatorics, math, number theory	3100	x566
653F	Paper task data structures, string suffix structures, strings	2600	x1013
653E	Bear and Forgotten Tree 2 dfs and similar, dsu, graphs, trees	2400	x1581
653D	Delivery Bears binary search, flows, graphs	2200	x2581
653C	Bear and Up-Down brute force, implementation	1900	x1660
652F	Ants on a Circle constructive algorithms, math	2800	x561
652E	Pursuit For Artifacts dfs and similar, dsu, graphs, trees	2300	x2273
652D	Nested Segments data structures, sortings	1800	x4092
652C	Foe Pairs combinatorics, sortings, two pointers	1800	x3288
652A	Gabriel and Caterpillar implementation, math	1400	x4808
650E	Clockwork Bomb data structures, dfs and similar, dsu, greedy, trees	3200	x612
650D	Zip-line binary search, data structures, dp, hashing	2600	x1410
650C	Table Compression dfs and similar, dp, dsu, graphs, greedy	2200	x2043
650B	Image Preview binary search, brute force, dp, two pointers	1900	x3371
650A	Watchmen data structures, geometry, math	1400	x15764
649E	Автобус binary search, data structures, greedy, sortings	2100	x111
649D	Дефрагментация памяти constructive algorithms, greedy, implementation	1600	x375
649C	Печать условий constructive algorithms, greedy, sortings	1500	x483
649B	Этажи constructive algorithms	1400	x563
648E	Собери число graphs, shortest paths	2300	x140
648D	Собачки и миски data structures, greedy, sortings	1900	x259
645G	Armistice Area Apportionment binary search, geometry	3200	x116
645F	Cowslip Collections combinatorics, math, number theory	2500	x817
645E	Intellectual Inquiry dp, greedy, strings	2200	x1296
645D	Robot Rapping Results Report binary search, dp, graphs	1800	x2963
645C	Enduring Exodus binary search, two pointers	1600	x3499
644C	Hostname Aliases *special problem, binary search, data structures, implementation, sortings, strings	2100	x925
644B	Processing Queries *special problem, constructive algorithms, data structures, two pointers	1700	x2715
643G	Choosing Ads data structures	3200	x1031
643F	Bears and Juice dp, math, meet-in-the-middle	2900	x729
643E	Bear and Destroying Subtrees dp, math, probabilities, trees	2700	x648
643D	Bearish Fanpages	2900	x318
643C	Levels and Regions dp	2400	x1451
643B	Bear and Two Paths constructive algorithms, graphs	1600	x3215
643A	Bear and Colors implementation	1500	x4165
641G	Little Artem and Graph	2300	x92
641F	Little Artem and 2-SAT	3000	x197
641E	Little Artem and Time Machine data structures	2000	x3360
641D	Little Artem and Random Variable dp, implementation, math, probabilities	2400	x1365
641C	Little Artem and Dance brute force, constructive algorithms, implementation	1800	x3090
641B	Little Artem and Matrix implementation	1400	x4052
639F	Bear and Chemistry data structures, dfs and similar, graphs, trees	3300	x430
639E	Bear and Paradox binary search, greedy, math, sortings	2800	x586
639D	Bear and Contribution data structures, greedy, sortings, two pointers	2400	x980
639C	Bear and Polynomials hashing, implementation, math	2200	x1220
639B	Bear and Forgotten Tree 3 constructive algorithms, graphs, trees	1600	x6572
638D	Three-dimensional Turtle Super Computer brute force, dfs and similar, graphs	1800	x728
638C	Road Improvement *special problem, dfs and similar, graphs, greedy, trees	1800	x1737
638B	Making Genome in Berland *special problem, dfs and similar, strings	1500	x1995
637D	Running with Obstacles *special problem, data structures, dp, greedy	1600	x2041
637C	Promocodes with Mistakes *special problem, brute force, constructive algorithms, implementation	1400	x2441
633H	Fibonacci-ish II data structures, implementation	3100	x604
633G	Yash And Trees bitmasks, data structures, dfs and similar, math, number theory	2800	x801
633F	The Chocolate Spree dfs and similar, dp, graphs, trees	2600	x1031
633E	Startup Funding binary search, constructive algorithms, data structures, probabilities, two pointers	2400	x596
633D	Fibonacci-ish brute force, dp, hashing, implementation, math	2000	x2835
633C	Spy Syndrome 2 data structures, dp, hashing, implementation, sortings, string suffix structures, strings	1900	x2825
632F	Magic Matrix brute force, divide and conquer, graphs, matrices, trees	2400	x1120
632E	Thief in a Shop divide and conquer, dp, fft, math	2400	x2906
632D	Longest Subsequence brute force, math, number theory	2100	x3898
632C	The Smallest String Concatenation sortings, strings	1700	x8264
632B	Alice, Bob, Two Teams brute force, constructive algorithms	1400	x4055
631E	Product Sum data structures, dp, geometry	2600	x2485
631D	Messenger data structures, hashing, implementation, string suffix structures, strings	2100	x2102
631C	Report data structures, sortings	1700	x3816
630Q	Pyramids geometry, math	1700	x1300
630P	Area of a Star geometry	2100	x1145
630O	Arrow geometry	2000	x782
630M	Turn geometry, math	1800	x1203
630L	Cracking the Code implementation, math	1400	x3640
630K	Indivisibility math, number theory	1500	x5507
630I	Parking Lot combinatorics, math	1700	x7026
630H	Benches combinatorics, math	1400	x5113
630G	Challenge Pennants combinatorics, math	1600	x2881
630E	A rectangle math	1900	x2361
629E	Famil Door and Roads combinatorics, data structures, dfs and similar, dp, probabilities, trees	2300	x1041
629D	Babaei and Birthday Cake data structures, dp	2000	x4108
629C	Famil Door and Brackets dp, strings	2000	x2848
628F	Bear and Fair Set flows, graphs	2500	x815
628E	Zbazi in Zeydabad data structures, implementation	2300	x942
628D	Magic Numbers dp	2200	x6306
627F	Island Puzzle dfs and similar, dsu, graphs, trees	3400	x240
627E	Orchestra two pointers	3000	x601
627D	Preorder Test binary search, dfs and similar, dp, graphs, greedy, trees	2600	x891
627C	Package Delivery data structures, divide and conquer, greedy	2200	x1183
627B	Factory Repairs data structures	1700	x2955
627A	XOR Equation dp, math	1700	x4283