Problemset - Codeforces

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Codeforces Round (Div. 4)
7 days

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Problems

#	Name
869D	The Overdosing Ubiquity brute force, dfs and similar, graphs	2800	x254
869C	The Intriguing Obsession combinatorics, dp, math	1800	x4776
868G	El Toll Caves math	3300	x140
868F	Yet Another Minimization Problem divide and conquer, dp	2500	x4016
868E	Policeman and a Tree dp, graphs, trees	2700	x533
868D	Huge Strings bitmasks, brute force, dp, implementation, strings	2200	x929
868C	Qualification Rounds bitmasks, brute force, constructive algorithms, dp	1500	x4677
868B	Race Against Time implementation	1400	x3699
865G	Flowers and Chocolate combinatorics, math, matrices	3300	x144
865F	Egg Roulette bitmasks, brute force, divide and conquer, math, meet-in-the-middle	3300	x73
865E	Hex Dyslexia bitmasks, brute force, dp, graphs	3300	x145
865D	Buy Low Sell High constructive algorithms, data structures, greedy	2400	x6010
865C	Gotta Go Fast binary search, dp	2400	x858
865B	Ordering Pizza binary search, sortings, ternary search	1900	x1881
865A	Save the problem! constructive algorithms	1400	x4361
864F	Cities Excursions dfs and similar, graphs, trees	2700	x641
864E	Fire dp, sortings	2000	x4324
864D	Make a Permutation! greedy, implementation, math	1500	x6042
864C	Bus greedy, implementation, math	1500	x5892
863G	Graphic Settings	3200	x58
863F	Almost Permutation flows	2200	x1299
863E	Turn Off The TV data structures, sortings	2000	x3259
863D	Yet Another Array Queries Problem data structures, implementation	1800	x3342
863C	1-2-3 graphs, implementation	1800	x2542
863B	Kayaking brute force, greedy, sortings	1500	x8826
862F	Mahmoud and Ehab and the final stage data structures, strings	2900	x221
862E	Mahmoud and Ehab and the function binary search, data structures, sortings	2100	x1691
862D	Mahmoud and Ehab and the binary string binary search, divide and conquer, interactive	2000	x1907
862C	Mahmoud and Ehab and the xor constructive algorithms	1900	x4171
860E	Arkady and a Nobody-men data structures, dfs and similar, trees	2700	x453
859G	Circle of Numbers math	3000	x164
859F	Ordering T-Shirts greedy	2800	x191
859E	Desk Disorder combinatorics, dfs and similar, dsu, graphs, trees	2100	x1891
859D	Third Month Insanity dp, probabilities, trees	2100	x1056
859C	Pie Rules dp, games	1500	x5505
858F	Wizard's Tour constructive algorithms, dfs and similar, graphs	2300	x1692
858E	Tests Renumeration greedy, implementation	2200	x513
858D	Polycarp's phone book data structures, implementation, sortings	1600	x3931
858C	Did you mean... dp, greedy, implementation	1500	x5656
858B	Which floor? brute force, implementation	1500	x3778
856F	To Play or not to Play greedy	3000	x106
856E	Satellites	3100	x73
856D	Masha and Cactus dp, trees	2400	x417
856C	Eleventh Birthday combinatorics, dp, math	2400	x642
856B	Similar Words dp, hashing, strings, trees	2300	x521
856A	Set Theory brute force, constructive algorithms	1600	x1468
855G	Harry Vs Voldemort dfs and similar, dp, graphs, trees	3300	x224
855F	Nagini binary search, data structures	3100	x474
855E	Salazar Slytherin's Locket bitmasks, dp	2200	x1834
855D	Rowena Ravenclaw's Diadem trees	2500	x535
855C	Helga Hufflepuff's Cup dp, trees	2000	x2123
855B	Marvolo Gaunt's Ring brute force, data structures, dp	1500	x8918
853E	Lada Malina data structures, geometry	3400	x71
853D	Michael and Charging Stations binary search, dp, greedy	2400	x683
853C	Boredom data structures	2100	x1522
853B	Jury Meeting greedy, sortings, two pointers	1800	x2573
853A	Planning greedy	1500	x5920
852I	Dating brute force, dfs and similar, graphs, trees	2300	x589
852H	Bob and stages dp, geometry	3000	x154
852G	Bathroom terminal implementation	1700	x1298
852F	Product transformation combinatorics, math, number theory	2200	x586
852E	Casinos and travel dp	2100	x1071
852D	Exploration plan binary search, flows, graph matchings, shortest paths	2100	x1065
852C	Property greedy, sortings	2100	x603
852B	Neural Network country dp, matrices	2000	x1500
852A	Digits brute force, implementation, math	2500	x396
851B	Arpa and an exam about geometry geometry, math	1400	x5596
850F	Rainbow Balls math	2800	x675
850E	Random Elections bitmasks, brute force, divide and conquer, fft, math	2800	x411
850D	Tournament Construction constructive algorithms, dp, graphs, greedy, math	2800	x396
850C	Arpa and a game with Mojtaba bitmasks, dp, games	2200	x1540
850B	Arpa and a list of numbers implementation, number theory	2100	x2041
850A	Five Dimensional Points brute force, geometry, math	1700	x3218
849B	Tell Your World brute force, geometry	1600	x3737
848E	Days of Floral Colours combinatorics, divide and conquer, dp, fft, math	3400	x221
848D	Shake It! combinatorics, dp, flows, graphs	2900	x394
848C	Goodbye Souvenir data structures, divide and conquer	2600	x1417
848B	Rooter's Song constructive algorithms, data structures, geometry, implementation, sortings, two pointers	1900	x1920
848A	From Y to Y constructive algorithms	1600	x5189
847L	Berland SU Computer Network constructive algorithms, dfs and similar, graphs, hashing, trees	2400	x323
847K	Travel Cards greedy, implementation, sortings	1800	x1721
847J	Students Initiation binary search, flows, graphs	2400	x646
847I	Noise Level dfs and similar, implementation, math	1900	x1536
847H	Load Testing greedy	1600	x2469
847F	Berland Elections greedy, sortings	2100	x871
847E	Packmen binary search, dp	1800	x3178
847D	Dog Show constructive algorithms, data structures, greedy	2200	x1231
847C	Sum of Nestings constructive algorithms	1800	x2416
847B	Preparing for Merge Sort binary search, data structures	1600	x5172
847A	Union of Doubly Linked Lists implementation	1500	x3477
846F	Random Query data structures, math, probabilities, two pointers	1800	x2356
846E	Chemistry in Berland dfs and similar, greedy, trees	2300	x918
846D	Monitor binary search, data structures	1900	x2583
846C	Four Segments brute force, data structures, dp	1800	x2740
846B	Math Show brute force, greedy	1800	x2572
846A	Curriculum Vitae brute force, implementation	1500	x4314
845G	Shortest Path Problem? dfs and similar, graphs, math	2300	x1733
845F	Guards In The Storehouse bitmasks, dp	2500	x468
845E	Fire in the City binary search, data structures	2400	x614
845D	Driving Test data structures, dp, greedy	1800	x2404