Problemset - Codeforces

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Codeforces Round 987 (Div. 2)
13:44:56
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Problems

#	Name
690E1	Photographs (I)	1800	x677
690D3	The Wall (hard) dp	2100	x523
690D2	The Wall (medium) combinatorics	1800	x1248
690D1	The Wall (easy)	1200	x2620
690C3	Brain Network (hard) trees	2200	x912
690C2	Brain Network (medium) dfs and similar, graphs, trees	1500	x3814
690C1	Brain Network (easy)	1300	x2771
690B3	Recover Polygon (hard) data structures	2600	x93
690B2	Recover Polygon (medium) geometry	2600	x204
690B1	Recover Polygon (easy)	1700	x941
690A3	Collective Mindsets (hard)	2400	x550
690A2	Collective Mindsets (medium)	2300	x710
690A1	Collective Mindsets (easy)	1100	x2877
689E	Mike and Geometry Problem combinatorics, data structures, dp, geometry, implementation	2000	x1940
689D	Friends and Subsequences binary search, data structures	2100	x3486
689C	Mike and Chocolate Thieves binary search, combinatorics, math	1700	x5388
689B	Mike and Shortcuts dfs and similar, graphs, greedy, shortest paths	1600	x6000
689A	Mike and Cellphone brute force, constructive algorithms, implementation	1400	x5272
688B	Lovely Palindromes constructive algorithms, math	1000	x32380
688A	Opponents implementation	800	x13981
687E	TOF dfs and similar, graphs	2900	x322
687D	Dividing Kingdom II brute force, data structures, dsu, graphs, sortings	2500	x961
687C	The Values You Can Make dp	1900	x5618
687B	Remainders Game chinese remainder theorem, math, number theory	1800	x5941
687A	NP-Hard Problem dfs and similar, graphs	1500	x14456
686B	Little Robber Girl's Zoo constructive algorithms, implementation, sortings	1100	x7799
686A	Free Ice Cream constructive algorithms, implementation	800	x37828
685E	Travelling Through the Snow Queen's Kingdom bitmasks, brute force, divide and conquer, graphs	2800	x557
685D	Kay and Eternity brute force, implementation, sortings	2600	x485
685C	Optimal Point binary search, math	2900	x584
685B	Kay and Snowflake data structures, dfs and similar, dp, trees	1900	x4154
685A	Robbers' watch brute force, combinatorics, dp, math	1700	x4235
683J	The Hero with Bombs *special problem	3000	x40
683I	Loader *special problem, graphs	2500	x38
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	x188
683D	Chocolate Bar *special problem, math	1400	x323
683C	Symmetric Difference *special problem	1600	x322
683B	The Teacher of Physical Education *special problem	1600	x317
683A	The Check of the Point *special problem, geometry	1200	x794
682E	Alyona and Triangles geometry, two pointers	2600	x669
682D	Alyona and Strings dp, strings	1900	x3336
682C	Alyona and the Tree dfs and similar, dp, graphs, trees	1600	x7281
682B	Alyona and Mex sortings	1200	x11540
682A	Alyona and Numbers constructive algorithms, math, number theory	1100	x21816
681E	Runaway to a Shadow geometry, sortings	2500	x465
681D	Gifts by the List constructive algorithms, dfs and similar, graphs, trees	2000	x1781
681C	Heap Operations constructive algorithms, data structures, greedy	1600	x7802
681B	Economy Game brute force	1300	x8964
681A	A Good Contest implementation	800	x15546
680B	Bear and Finding Criminals constructive algorithms, implementation	1000	x24439
680A	Bear and Five Cards constructive algorithms, implementation	800	x12352
679E	Bear and Bad Powers of 42 data structures	3100	x692
679D	Bear and Chase brute force, dfs and similar, graphs, implementation, math, probabilities	2900	x318
679C	Bear and Square Grid dfs and similar, dsu, implementation	2400	x1157
679B	Bear and Tower of Cubes binary search, dp, greedy	2200	x2152
679A	Bear and Prime 100 constructive algorithms, interactive, math	1400	x13109
678F	Lena and Queries data structures, divide and conquer, geometry	2500	x891
678E	Another Sith Tournament bitmasks, dp, math, probabilities	2200	x2216
678D	Iterated Linear Function math, number theory	1700	x4565
678C	Joty and Chocolate implementation, math, number theory	1600	x9522
678B	The Same Calendar implementation	1600	x4137
678A	Johny Likes Numbers implementation, math	800	x13355
677E	Vanya and Balloons binary search, brute force, dp, implementation	2300	x603
677D	Vanya and Treasure data structures, dp, graphs, shortest paths	2300	x1599
677C	Vanya and Label bitmasks, combinatorics, implementation, strings	1500	x6434
677B	Vanya and Food Processor implementation, math	1400	x7665
677A	Vanya and Fence implementation	800	x143388
676E	The Last Fight Between Human and AI math	2400	x895
676D	Theseus and labyrinth graphs, implementation, shortest paths	2000	x1863
676C	Vasya and String binary search, dp, strings, two pointers	1500	x19047
676B	Pyramid of Glasses implementation, math, math	1500	x5520
676A	Nicholas and Permutation constructive algorithms, implementation	800	x13846
675E	Trains and Statistic data structures, dp, greedy	2300	x2786
675D	Tree Construction data structures, trees	1800	x3817
675C	Money Transfers constructive algorithms, data structures, greedy, sortings	2100	x3661
675B	Restoring Painting brute force, constructive algorithms, math	1400	x7409
675A	Infinite Sequence math	1100	x14989
673B	Problems for Round greedy, implementation	1300	x3523
673A	Bear and Game implementation	800	x10077
672B	Different is Good constructive algorithms, implementation, strings	1000	x17424
672A	Summer Camp implementation	800	x15373
671E	Organizing a Race data structures, greedy	3300	x415
671D	Roads in Yusland data structures, dp, greedy	2900	x1160
671C	Ultimate Weirdness of an Array data structures, number theory	2800	x688
671B	Robin Hood binary search, greedy	2000	x3033
671A	Recycling Bottles dp, geometry, greedy, implementation	1800	x4192
670F	Restore a Number brute force, constructive algorithms, strings	2300	x861
670E	Correct Bracket Sequence Editor data structures, dsu, strings	1700	x3238
670D2	Magic Powder - 2 binary search, implementation	1500	x14622
670D1	Magic Powder - 1 binary search, brute force, implementation	1400	x18210
670C	Cinema implementation, sortings	1300	x9184
670B	Game of Robots implementation	1000	x11274
670A	Holidays brute force, constructive algorithms, greedy, math	900	x17060
669A	Little Artem and Presents math	800	x10857
667B	Coat of Anticubism constructive algorithms, geometry	1100	x5630
667A	Pouring Rain geometry, math	1100	x8050
666E	Forensic Examination data structures, string suffix structures	3100	x1402