Problemset - Codeforces

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Pinely Round 4 (Div. 1 + Div. 2)
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Problems

#	Name
671C	Ultimate Weirdness of an Array data structures, number theory	2800	x679
666E	Forensic Examination data structures, string suffix structures	3100	x1362
666D	Chain Reaction brute force, geometry	3000	x276
666C	Codeword combinatorics, strings	2500	x775
665F	Four Divisors data structures, dp, math, number theory, sortings, two pointers	2400	x595
662E	To Hack or not to Hack brute force, dp, greedy	3100	x135
662C	Binary Table bitmasks, brute force, divide and conquer, dp, fft, math	2600	x1985
662A	Gambling Nim bitmasks, math, matrices, probabilities	2400	x451
661H	Rotate Matrix *special problem	2400	x69
660F	Bear and Bowling 4 binary search, data structures, divide and conquer, geometry, ternary search	2500	x1594
653G	Move by Prime combinatorics, math, number theory	3100	x524
653F	Paper task data structures, string suffix structures, strings	2600	x979
653E	Bear and Forgotten Tree 2 dfs and similar, dsu, graphs, trees	2400	x1469
652F	Ants on a Circle constructive algorithms, math	2800	x536
650E	Clockwork Bomb data structures, dfs and similar, dsu, greedy, trees	3200	x594
650D	Zip-line binary search, data structures, dp, hashing	2600	x1254
645G	Armistice Area Apportionment binary search, geometry	3200	x112
645F	Cowslip Collections combinatorics, math, number theory	2500	x771
643G	Choosing Ads data structures	3200	x947
643F	Bears and Juice dp, math, meet-in-the-middle	2900	x697
643E	Bear and Destroying Subtrees dp, math, probabilities, trees	2700	x587
643D	Bearish Fanpages	2900	x312
643C	Levels and Regions dp	2400	x1338
641F	Little Artem and 2-SAT	3000	x185
641D	Little Artem and Random Variable dp, implementation, math, probabilities	2400	x1101
639F	Bear and Chemistry data structures, dfs and similar, graphs, trees	3300	x415
639E	Bear and Paradox binary search, greedy, math, sortings	2800	x574
639D	Bear and Contribution data structures, greedy, sortings, two pointers	2400	x841
633H	Fibonacci-ish II data structures, implementation	3100	x587
633G	Yash And Trees bitmasks, data structures, dfs and similar, math, number theory	2800	x768
633F	The Chocolate Spree dfs and similar, dp, graphs, trees	2600	x953
633E	Startup Funding binary search, constructive algorithms, data structures, probabilities, two pointers	2400	x581
632F	Magic Matrix brute force, divide and conquer, graphs, matrices, trees	2400	x1056
632E	Thief in a Shop divide and conquer, dp, fft, math	2400	x2664
631E	Product Sum data structures, dp, geometry	2600	x2287
628F	Bear and Fair Set flows, graphs	2500	x751
627F	Island Puzzle dfs and similar, dsu, graphs, trees	3400	x236
627E	Orchestra two pointers	3000	x547
627D	Preorder Test binary search, dfs and similar, dp, graphs, greedy, trees	2600	x810
626G	Raffles data structures, dp, greedy, math	3100	x523
626F	Group Projects dp	2400	x2750
626E	Simple Skewness binary search, math, ternary search	2400	x1308
625E	Frog Fights data structures, greedy	2800	x326
625D	Finals in arithmetic constructive algorithms, implementation, math	2400	x626
623E	Transforming Sequence combinatorics, dp, fft, math	3300	x543
623D	Birthday greedy, math, probabilities	2700	x471
623C	Electric Charges binary search, dp	2900	x463
622F	The Sum of the k-th Powers math	2600	x3635
621D	Rat Kwesh and Cheese brute force, constructive algorithms, math	2400	x968
620F	Xors on Segments data structures, strings, trees	2800	x718
618G	Combining Slimes dp, math, matrices, probabilities	3300	x232
618F	Double Knapsack constructive algorithms, two pointers	3000	x1346
618E	Robot Arm data structures, geometry	2500	x589
616F	Expensive Strings string suffix structures, strings	2700	x574
613E	Puzzle Lover dp, hashing, strings	3200	x459
613D	Kingdom and its Cities dfs and similar, divide and conquer, dp, graphs, sortings, trees	2800	x2812
613C	Necklace constructive algorithms, math	2500	x994
612F	Simba on the Circle dp	2600	x377
611H	New Year and Forgotten Tree constructive algorithms, flows, graphs	3200	x581
611G	New Year and Cake geometry, two pointers	2900	x431
611F	New Year and Cleaning binary search, implementation	2500	x462
611E	New Year and Three Musketeers data structures, greedy, sortings	2400	x862
610E	Alphabet Permutations data structures, strings	2500	x860
609F	Frogs and mosquitoes data structures, greedy	2500	x1217
607E	Cross Sum binary search, geometry	3300	x250
607D	Power Tree data structures, trees	2600	x563
607C	Marbles hashing, strings	2500	x784
605E	Intergalaxy Trips probabilities, shortest paths	2700	x1364
605D	Board Game data structures, dfs and similar	2500	x796
605C	Freelancer's Dreams geometry	2400	x1109
603E	Pastoral Oddities data structures, divide and conquer, dsu, math, trees	3000	x1213
603D	Ruminations on Ruminants geometry, math	2900	x340
601E	A Museum Robbery data structures, dp	2800	x854
601D	Acyclic Organic Compounds data structures, dfs and similar, dsu, hashing, strings, trees	2400	x1103
600F	Edge coloring of bipartite graph graphs	2800	x761
599E	Sandy and Nuts bitmasks, dp, trees	2600	x627
598F	Cut Length geometry	2900	x362
596E	Wilbur and Strings dfs and similar, dp, graphs, strings	2500	x390
594E	Cutting the Line string suffix structures, strings	3100	x158
594D	REQ data structures, number theory	2500	x1572
594B	Max and Bike binary search, geometry	2500	x495
593E	Strange Calculation and Cats dp, matrices	2400	x586
593D	Happy Tree Party data structures, dfs and similar, graphs, math, trees	2400	x1220
592E	BCPC binary search, geometry, two pointers	2700	x213
590E	Birthday graph matchings, strings	3200	x765
587F	Duff is Mad data structures, strings	3000	x1014
587E	Duff as a Queen data structures	2900	x695
587D	Duff in Mafia 2-sat, binary search	3100	x687
585F	Digits of Number Pi dp, implementation, strings	3200	x643
585E	Present for Vitalik the Philatelist combinatorics, math, number theory	2900	x1055
585C	Alice, Bob, Oranges and Apples number theory	2400	x972
582E	Boolean Function bitmasks, dp, expression parsing	3000	x482
582D	Number of Binominal Coefficients dp, math, number theory	3300	x614
582C	Superior Periodic Subarrays number theory	2400	x736
581F	Zublicanes and Mumocrates dp, trees, two pointers	2400	x862
581E	Kojiro and Furrari dp, greedy	2800	x190
580E	Kefa and Watch data structures, hashing, strings	2500	x2003
578F	Mirror Box matrices, trees	3200	x542
578E	Walking! constructive algorithms, greedy	2700	x627
578D	LCS Again dp, greedy	2700	x796