Problemset - Codeforces

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Codeforces Round (Div. 2)
7 days

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Problems

#	Name
690C1	Brain Network (easy)	1300	x2755
690B1	Recover Polygon (easy)	1700	x940
689C	Mike and Chocolate Thieves binary search, combinatorics, math	1700	x5326
689B	Mike and Shortcuts dfs and similar, graphs, greedy, shortest paths	1600	x5714
689A	Mike and Cellphone brute force, constructive algorithms, implementation	1400	x5257
687C	The Values You Can Make dp	1900	x5500
687B	Remainders Game chinese remainder theorem, math, number theory	1800	x5871
687A	NP-Hard Problem dfs and similar, graphs	1500	x14337
685B	Kay and Snowflake data structures, dfs and similar, dp, trees	1900	x4074
685A	Robbers' watch brute force, combinatorics, dp, math	1700	x4229
683H	Exchange of Books *special problem	1900	x95
683G	The Fraction *special problem	1900	x130
683F	Reformat the String *special problem	1800	x146
683E	Hammer throwing *special problem	1800	x187
683D	Chocolate Bar *special problem, math	1400	x322
683C	Symmetric Difference *special problem	1600	x315
683B	The Teacher of Physical Education *special problem	1600	x317
682D	Alyona and Strings dp, strings	1900	x3294
682C	Alyona and the Tree dfs and similar, dp, graphs, trees	1600	x7227
681C	Heap Operations constructive algorithms, data structures, greedy	1600	x7722
681B	Economy Game brute force	1300	x8933
679A	Bear and Prime 100 constructive algorithms, interactive, math	1400	x12979
678D	Iterated Linear Function math, number theory	1700	x4507
678C	Joty and Chocolate implementation, math, number theory	1600	x9404
678B	The Same Calendar implementation	1600	x4110
677C	Vanya and Label bitmasks, combinatorics, implementation, strings	1500	x6407
677B	Vanya and Food Processor implementation, math	1400	x7640
676C	Vasya and String binary search, dp, strings, two pointers	1500	x18825
676B	Pyramid of Glasses implementation, math, math	1500	x5496
675D	Tree Construction data structures, trees	1800	x3786
675B	Restoring Painting brute force, constructive algorithms, math	1400	x7382
673B	Problems for Round greedy, implementation	1300	x3522
671A	Recycling Bottles dp, geometry, greedy, implementation	1800	x4183
670E	Correct Bracket Sequence Editor data structures, dsu, strings	1700	x3218
670D2	Magic Powder - 2 binary search, implementation	1500	x14305
670D1	Magic Powder - 1 binary search, brute force, implementation	1400	x17766
670C	Cinema implementation, sortings	1300	x9128
666A	Reberland Linguistics dp, implementation, strings	1800	x3478
665D	Simple Subset constructive algorithms, greedy, number theory	1800	x3480
665C	Simple Strings dp, greedy, strings	1300	x10302
665B	Shopping brute force	1400	x3542
665A	Buses Between Cities implementation	1600	x2931
663A	Rebus constructive algorithms, expression parsing, greedy, math	1800	x3296
661F	Primes in Interval *special problem	1900	x323
661B	Seasons *special problem	1900	x228
661A	Lazy Caterer Sequence *special problem	1300	x637
660D	Number of Parallelograms geometry	1900	x3973
660C	Hard Process binary search, dp, two pointers	1600	x9391
659E	New Reform data structures, dfs and similar, dsu, graphs, greedy	1600	x7451
659D	Bicycle Race geometry, implementation, math	1500	x6314
659B	Qualifying Contest constructive algorithms, sortings	1300	x6267
656G	You're a Professional *special problem	1900	x483
656F	Ace It! *special problem	1900	x907
656B	Scrambled *special problem, implementation	1700	x1654
656A	Da Vinci Powers *special problem	1900	x3615
653C	Bear and Up-Down brute force, implementation	1900	x1645
653B	Bear and Compressing brute force, dfs and similar, dp, strings	1300	x4971
652D	Nested Segments data structures, sortings	1800	x3975
652C	Foe Pairs combinatorics, sortings, two pointers	1800	x3222
652A	Gabriel and Caterpillar implementation, math	1400	x4626
650B	Image Preview binary search, brute force, dp, two pointers	1900	x3345
650A	Watchmen data structures, geometry, math	1400	x15471
649D	Дефрагментация памяти constructive algorithms, greedy, implementation	1600	x356
649C	Печать условий constructive algorithms, greedy, sortings	1500	x455
649B	Этажи constructive algorithms	1400	x536
648D	Собачки и миски data structures, greedy, sortings	1900	x232
645D	Robot Rapping Results Report binary search, dp, graphs	1800	x2887
645C	Enduring Exodus binary search, two pointers	1600	x3274
644B	Processing Queries *special problem, constructive algorithms, data structures, two pointers	1700	x2700
643B	Bear and Two Paths constructive algorithms, graphs	1600	x3168
643A	Bear and Colors implementation	1500	x4141
641C	Little Artem and Dance brute force, constructive algorithms, implementation	1800	x3074
641B	Little Artem and Matrix implementation	1400	x3984
639B	Bear and Forgotten Tree 3 constructive algorithms, graphs, trees	1600	x6503
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
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
634A	Island Puzzle constructive algorithms, implementation	1300	x3309
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
632C	The Smallest String Concatenation sortings, strings	1700	x7779
632B	Alice, Bob, Two Teams brute force, constructive algorithms	1400	x3998
631C	Report data structures, sortings	1700	x3789
630Q	Pyramids geometry, math	1700	x1266
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	x5255
630I	Parking Lot combinatorics, math	1700	x6713
630H	Benches combinatorics, math	1400	x4945
630G	Challenge Pennants combinatorics, math	1600	x2734
630F	Selection of Personnel combinatorics, math	1300	x6804
630E	A rectangle math	1900	x2327
628C	Bear and String Distance greedy, strings	1300	x5841
628B	New Skateboard dp	1300	x10775
627B	Factory Repairs data structures	1700	x2930
627A	XOR Equation dp, math	1700	x4224
626D	Jerry's Protest brute force, combinatorics, dp, probabilities	1800	x2751