Problemset - Codeforces

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Codeforces Round (Div. 2)
7 days

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Problems

#	Name
643A	Bear and Colors implementation	1500	x4141
641G	Little Artem and Graph	2300	x91
641F	Little Artem and 2-SAT	3000	x193
641E	Little Artem and Time Machine data structures	2000	x3243
641D	Little Artem and Random Variable dp, implementation, math, probabilities	2400	x1241
641C	Little Artem and Dance brute force, constructive algorithms, implementation	1800	x3074
641B	Little Artem and Matrix implementation	1400	x3984
641A	Little Artem and Grasshopper implementation	1000	x5905
639F	Bear and Chemistry data structures, dfs and similar, graphs, trees	3300	x421
639E	Bear and Paradox binary search, greedy, math, sortings	2800	x582
639D	Bear and Contribution data structures, greedy, sortings, two pointers	2400	x966
639C	Bear and Polynomials hashing, implementation, math	2200	x1203
639B	Bear and Forgotten Tree 3 constructive algorithms, graphs, trees	1600	x6503
639A	Bear and Displayed Friends implementation	1200	x6149
638D	Three-dimensional Turtle Super Computer brute force, dfs and similar, graphs	1800	x713
638C	Road Improvement *special problem, dfs and similar, graphs, greedy, trees	1800	x1631
638B	Making Genome in Berland *special problem, dfs and similar, strings	1500	x1967
638A	Home Numbers *special problem, constructive algorithms, math	1100	x3865
637D	Running with Obstacles *special problem, data structures, dp, greedy	1600	x2009
637C	Promocodes with Mistakes *special problem, brute force, constructive algorithms, implementation	1400	x2423
637B	Chat Order *special problem, binary search, constructive algorithms, data structures, sortings	1200	x16422
637A	Voting for Photos *special problem, constructive algorithms, implementation	1000	x5409
635A	Orchestra brute force, implementation	1100	x2888
634A	Island Puzzle constructive algorithms, implementation	1300	x3309
633H	Fibonacci-ish II data structures, implementation	3100	x593
633G	Yash And Trees bitmasks, data structures, dfs and similar, math, number theory	2800	x776
633F	The Chocolate Spree dfs and similar, dp, graphs, trees	2600	x970
633E	Startup Funding binary search, constructive algorithms, data structures, probabilities, two pointers	2400	x583
633D	Fibonacci-ish brute force, dp, hashing, implementation, math	2000	x2798
633C	Spy Syndrome 2 data structures, dp, hashing, implementation, sortings, string suffix structures, strings	1900	x2759
633B	A Trivial Problem brute force, constructive algorithms, math, number theory	1300	x6677
633A	Ebony and Ivory brute force, math, number theory	1100	x12719
632F	Magic Matrix brute force, divide and conquer, graphs, matrices, trees	2400	x1085
632E	Thief in a Shop divide and conquer, dp, fft, math	2400	x2768
632D	Longest Subsequence brute force, math, number theory	2100	x3761
632C	The Smallest String Concatenation sortings, strings	1700	x7780
632B	Alice, Bob, Two Teams brute force, constructive algorithms	1400	x3998
632A	Grandma Laura and Apples	1200	x4588
631E	Product Sum data structures, dp, geometry	2600	x2346
631D	Messenger data structures, hashing, implementation, string suffix structures, strings	2100	x2074
631C	Report data structures, sortings	1700	x3789
631B	Print Check constructive algorithms, implementation	1200	x7383
631A	Interview brute force, implementation	900	x9306
630R	Game games, math	1200	x8619
630Q	Pyramids geometry, math	1700	x1266
630P	Area of a Star geometry	2100	x1122
630O	Arrow geometry	2000	x769
630N	Forecast math	1300	x4655
630M	Turn geometry, math	1800	x1155
630L	Cracking the Code implementation, math	1400	x3566
630K	Indivisibility math, number theory	1500	x5257
630J	Divisibility math, number theory	1100	x11067
630I	Parking Lot combinatorics, math	1700	x6713
630H	Benches combinatorics, math	1400	x4945
630G	Challenge Pennants combinatorics, math	1600	x2735
630F	Selection of Personnel combinatorics, math	1300	x6805
630E	A rectangle math	1900	x2327
630D	Hexagons! math	1100	x10865
630C	Lucky Numbers combinatorics, math	1100	x21885
630B	Moore's Law math	1200	x7382
630A	Again Twenty Five! number theory	800	x67480
629E	Famil Door and Roads combinatorics, data structures, dfs and similar, dp, probabilities, trees	2300	x1003
629D	Babaei and Birthday Cake data structures, dp	2000	x4006
629C	Famil Door and Brackets dp, strings	2000	x2797
629B	Far Relative’s Problem brute force	1100	x8044
629A	Far Relative’s Birthday Cake brute force, combinatorics, constructive algorithms, implementation	800	x13381
628F	Bear and Fair Set flows, graphs	2500	x770
628E	Zbazi in Zeydabad data structures, implementation	2300	x886
628D	Magic Numbers dp	2200	x5974
628C	Bear and String Distance greedy, strings	1300	x5841
628B	New Skateboard dp	1300	x10775
628A	Tennis Tournament implementation, math	1000	x6315
627F	Island Puzzle dfs and similar, dsu, graphs, trees	3400	x238
627E	Orchestra two pointers	3000	x571
627D	Preorder Test binary search, dfs and similar, dp, graphs, greedy, trees	2600	x864
627C	Package Delivery data structures, divide and conquer, greedy	2200	x1172
627B	Factory Repairs data structures	1700	x2930
627A	XOR Equation dp, math	1700	x4224
626G	Raffles data structures, dp, greedy, math	3100	x531
626F	Group Projects dp	2400	x2866
626E	Simple Skewness binary search, math, ternary search	2400	x1331
626D	Jerry's Protest brute force, combinatorics, dp, probabilities	1800	x2751
626C	Block Towers brute force, greedy, math, number theory	1600	x4340
626B	Cards constructive algorithms, dp, math	1300	x6611
626A	Robot Sequence brute force, implementation	1000	x6237
625E	Frog Fights data structures, greedy	2800	x331
625D	Finals in arithmetic constructive algorithms, implementation, math	2400	x633
625C	K-special Tables constructive algorithms, implementation	1300	x6823
625B	War of the Corporations constructive algorithms, greedy, strings	1200	x10391
625A	Guest From the Past implementation, math	1700	x5408
624B	Making a String greedy, sortings	1100	x7979
624A	Save Luke math	800	x10259
623E	Transforming Sequence combinatorics, dp, fft, math	3300	x548
623D	Birthday greedy, math, probabilities	2700	x497
623C	Electric Charges binary search, dp	2900	x479
623B	Array GCD dp, greedy, number theory	2300	x2154
623A	Graph and String constructive algorithms, graphs	1800	x4477
622F	The Sum of the k-th Powers math	2600	x3833
622E	Ants in Leaves dfs and similar, greedy, sortings, trees	2200	x2066
622D	Optimal Number Permutation constructive algorithms	1900	x2982