Problemset - Codeforces

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Codeforces Round (Div. 3)
8 days

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Problems

#	Name
641C	Little Artem and Dance brute force, constructive algorithms, implementation	1800	x3092
641B	Little Artem and Matrix implementation	1400	x4061
641A	Little Artem and Grasshopper implementation	1000	x6021
639F	Bear and Chemistry data structures, dfs and similar, graphs, trees	3300	x433
639E	Bear and Paradox binary search, greedy, math, sortings	2800	x586
639D	Bear and Contribution data structures, greedy, sortings, two pointers	2400	x983
639C	Bear and Polynomials hashing, implementation, math	2200	x1220
639B	Bear and Forgotten Tree 3 constructive algorithms, graphs, trees	1600	x6588
639A	Bear and Displayed Friends implementation	1200	x6189
638D	Three-dimensional Turtle Super Computer brute force, dfs and similar, graphs	1800	x729
638C	Road Improvement *special problem, dfs and similar, graphs, greedy, trees	1800	x1761
638B	Making Genome in Berland *special problem, dfs and similar, strings	1500	x2001
638A	Home Numbers *special problem, constructive algorithms, math	1100	x4098
637D	Running with Obstacles *special problem, data structures, dp, greedy	1600	x2047
637C	Promocodes with Mistakes *special problem, brute force, constructive algorithms, implementation	1400	x2444
637B	Chat Order *special problem, binary search, constructive algorithms, data structures, sortings	1200	x18119
637A	Voting for Photos *special problem, constructive algorithms, implementation	1000	x5520
635A	Orchestra brute force, implementation	1100	x2957
634A	Island Puzzle constructive algorithms, implementation	1300	x3342
633H	Fibonacci-ish II data structures, implementation	3100	x611
633G	Yash And Trees bitmasks, data structures, dfs and similar, math, number theory	2800	x805
633F	The Chocolate Spree dfs and similar, dp, graphs, trees	2600	x1038
633E	Startup Funding binary search, constructive algorithms, data structures, probabilities, two pointers	2400	x596
633D	Fibonacci-ish brute force, dp, hashing, implementation, math	2000	x2845
633C	Spy Syndrome 2 data structures, dp, hashing, implementation, sortings, string suffix structures, strings	1900	x2917
633B	A Trivial Problem brute force, constructive algorithms, math, number theory	1300	x6793
633A	Ebony and Ivory brute force, math, number theory	1100	x13185
632F	Magic Matrix brute force, divide and conquer, graphs, matrices, trees	2400	x1128
632E	Thief in a Shop divide and conquer, dp, fft, math	2400	x2940
632D	Longest Subsequence brute force, math, number theory	2100	x3997
632C	The Smallest String Concatenation sortings, strings	1700	x8350
632B	Alice, Bob, Two Teams brute force, constructive algorithms	1400	x4069
632A	Grandma Laura and Apples	1200	x4654
631E	Product Sum data structures, dp, geometry	2600	x2518
631D	Messenger data structures, hashing, implementation, string suffix structures, strings	2100	x2145
631C	Report data structures, sortings	1700	x3823
631B	Print Check constructive algorithms, implementation	1200	x7508
631A	Interview brute force, implementation	900	x9405
630R	Game games, math	1200	x8895
630Q	Pyramids geometry, math	1700	x1310
630P	Area of a Star geometry	2100	x1154
630O	Arrow geometry	2000	x790
630N	Forecast math	1300	x4834
630M	Turn geometry, math	1800	x1215
630L	Cracking the Code implementation, math	1400	x3656
630K	Indivisibility math, number theory	1500	x5537
630J	Divisibility math, number theory	1100	x11610
630I	Parking Lot combinatorics, math	1700	x7096
630H	Benches combinatorics, math	1400	x5130
630G	Challenge Pennants combinatorics, math	1600	x2912
630F	Selection of Personnel combinatorics, math	1300	x7125
630E	A rectangle math	1900	x2385
630D	Hexagons! math	1100	x11372
630C	Lucky Numbers combinatorics, math	1100	x23159
630B	Moore's Law math	1200	x7634
630A	Again Twenty Five! number theory	800	x74363
629E	Famil Door and Roads combinatorics, data structures, dfs and similar, dp, probabilities, trees	2300	x1044
629D	Babaei and Birthday Cake data structures, dp	2000	x4144
629C	Famil Door and Brackets dp, strings	2000	x2857
629B	Far Relative’s Problem brute force	1100	x8099
629A	Far Relative’s Birthday Cake brute force, combinatorics, constructive algorithms, implementation	800	x13743
628F	Bear and Fair Set flows, graphs	2500	x818
628E	Zbazi in Zeydabad data structures, implementation	2300	x950
628D	Magic Numbers dp	2200	x6398
628C	Bear and String Distance greedy, strings	1300	x5942
628B	New Skateboard dp	1300	x11238
628A	Tennis Tournament implementation, math	1000	x6556
627F	Island Puzzle dfs and similar, dsu, graphs, trees	3400	x244
627E	Orchestra two pointers	3000	x606
627D	Preorder Test binary search, dfs and similar, dp, graphs, greedy, trees	2600	x895
627C	Package Delivery data structures, divide and conquer, greedy	2200	x1199
627B	Factory Repairs data structures	1700	x3012
627A	XOR Equation dp, math	1700	x4294
626G	Raffles data structures, dp, greedy, math	3100	x549
626F	Group Projects dp	2400	x3100
626E	Simple Skewness binary search, math, ternary search	2400	x1432
626D	Jerry's Protest brute force, combinatorics, dp, probabilities	1800	x2794
626C	Block Towers brute force, greedy, math, number theory	1600	x4396
626B	Cards constructive algorithms, dp, math	1300	x6666
626A	Robot Sequence brute force, implementation	1000	x6315
625E	Frog Fights data structures, greedy	2800	x349
625D	Finals in arithmetic constructive algorithms, implementation, math	2400	x642
625C	K-special Tables constructive algorithms, implementation	1300	x6880
625B	War of the Corporations constructive algorithms, greedy, strings	1200	x10673
625A	Guest From the Past implementation, math	1700	x5435
624B	Making a String greedy, sortings	1100	x8034
624A	Save Luke math	800	x10585
623E	Transforming Sequence combinatorics, dp, fft, math	3300	x564
623D	Birthday greedy, math, probabilities	2700	x502
623C	Electric Charges binary search, dp	2900	x483
623B	Array GCD dp, greedy, number theory	2300	x2220
623A	Graph and String constructive algorithms, graphs	1800	x4533
622F	The Sum of the k-th Powers math	2600	x4114
622E	Ants in Leaves dfs and similar, greedy, sortings, trees	2200	x2177
622D	Optimal Number Permutation constructive algorithms	1900	x3056
622C	Not Equal on a Segment data structures, implementation	1700	x6877
622B	The Time implementation	900	x9859
622A	Infinite Sequence implementation, math	1000	x9591
621E	Wet Shark and Blocks dp, matrices	2000	x2910
621D	Rat Kwesh and Cheese brute force, constructive algorithms, math	2400	x1006