Problemset - Codeforces

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Codeforces Round #851 (Div. 2)
2 days
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Problems

#	Name
644C	Hostname Aliases *special problem, binary search, data structures, implementation, sortings, strings	2100	x878
193B	Xor brute force	2000	x877
226D	The table constructive algorithms, greedy	2100	x874
220C	Little Elephant and Shifts data structures	2100	x873
77C	Beavermuncher-0xFF dfs and similar, dp, dsu, greedy, trees	2100	x867
954F	Runner's Problem dp, matrices, sortings	2100	x866
31D	Chocolate dfs and similar, implementation	2000	x866
1599H	Hidden Fortress interactive, math	2100	x863
336D	Vasily the Bear and Beautiful Strings combinatorics, math, number theory	2100	x861
630P	Area of a Star geometry	2100	x860
1184A2	Heidi Learns Hashing (Medium) brute force, number theory	2100	x859
18E	Flag 2 dp	2000	x852
171C	A Piece of Cake *special problem, implementation	2000	x845
400E	Inna and Binary Logic binary search, bitmasks, data structures	2100	x826
74C	Chessboard Billiard dfs and similar, dsu, graphs, number theory	2100	x822
958A2	Death Stars (medium) hashing, strings	2000	x808
362D	Fools and Foolproof Roads data structures, dfs and similar, dsu, graphs, greedy	2100	x799
847F	Berland Elections greedy, sortings	2100	x797
457C	Elections brute force	2100	x792
374D	Inna and Sequence binary search, data structures, dp, trees	2000	x786
1184E2	Daleks' Invasion (medium) dfs and similar, graphs, shortest paths, trees	2100	x783
39E	What Has Dirichlet Got to Do with That? dp, games	2000	x783
859D	Third Month Insanity dp, probabilities, trees	2100	x778
217B	Blackboard Fibonacci brute force, math	2100	x778
852D	Exploration plan binary search, flows, graph matchings, shortest paths	2100	x774
245F	Log Stream Analysis binary search, brute force, implementation, strings	2000	x774
656D	Rosetta Problem *special problem	2100	x769
119C	Education Reform dp	2000	x766
720A	Closing ceremony greedy	2000	x748
1725F	Field Photography bitmasks, data structures, sortings	2100	x747
475C	Kamal-ol-molk's Painting brute force, constructive algorithms, greedy	2100	x746
253D	Table with Letters - 2 brute force, two pointers	2000	x744
82C	General Mobilization data structures, dfs and similar, sortings	2000	x743
852E	Casinos and travel dp	2100	x740
65C	Harry Potter and the Golden Snitch binary search, geometry	2100	x736
26C	Parquet combinatorics, constructive algorithms, greedy, implementation	2000	x719
13B	Letter A geometry, implementation	2000	x717
784B	Kids' Riddle *special problem	2000	x716
435D	Special Grid brute force, dp, greedy	2000	x716
261C	Maxim and Matrix constructive algorithms, dp, math	2000	x715
248C	Robo-Footballer binary search, geometry	2000	x711
225E	Unsolvable math, number theory	2100	x704
542F	Quest dp, greedy	2100	x703
106E	Space Rescuers geometry, ternary search	2100	x702
522C	Chicken or Fish? greedy	2100	x684
1057C	Tanya and Colored Candies *special problem, dp	2000	x681
784G	BF Calculator *special problem	2000	x678
50C	Happy Farm 5 geometry	2000	x669
413D	2048 bitmasks, dp	2000	x666
656E	Out of Controls *special problem	2000	x663
126C	E-reader Display constructive algorithms, greedy	2000	x650
182C	Optimal Sum data structures, greedy	2000	x648
58D	Calendar greedy, strings	2000	x637
386C	Diverse Substrings dp, strings, two pointers	2000	x634
61C	Capture Valerian math	2000	x634
195E	Building Forest data structures, dsu, graphs	2000	x629
101C	Vectors implementation, math	2000	x629
35E	Parade data structures, sortings	2100	x629
630O	Arrow geometry	2000	x623
63E	Sweets Game bitmasks, dfs and similar, dp, games, implementation	2000	x615
656C	Without Text *special problem	2000	x600
66E	Petya and Post data structures, dp	2000	x600
39A	C*++ Calculations expression parsing, greedy	2000	x598
81D	Polycarp's Picture Gallery constructive algorithms, greedy	2100	x586
47C	Crossword implementation	2000	x584
952E	Cheese Board	2000	x577
109D	Lucky Sorting constructive algorithms, sortings	2000	x577
370D	Broken Monitor brute force, constructive algorithms, greedy, implementation	2100	x572
132D	Constants in the language of Shakespeare constructive algorithms, dp, greedy	2100	x563
50D	Bombing binary search, dp, probabilities	2100	x558
1387A	Graph *special problem, binary search, dfs and similar, dp, math, ternary search	2100	x555
131F	Present to Mom binary search, two pointers	2000	x546
59D	Team Arrangement constructive algorithms, greedy, implementation	2000	x539
267B	Dominoes dfs and similar, graphs	2000	x537
34E	Collisions brute force, implementation, math	2000	x530
234H	Merging Two Decks constructive algorithms, greedy	2000	x529
802K	Send the Fool Further! (medium) dp, trees	2100	x528
1219G	Harvester implementation	2000	x523
69C	Game implementation	2000	x522
39C	Moon Craters dp, sortings	2100	x522
60C	Mushroom Strife brute force, dfs and similar	2100	x520
163C	Conveyor sortings, two pointers	2100	x517
216E	Martian Luck math, number theory	2000	x514
1218I	The Light Square 2-sat, dfs and similar, greedy	2100	x511
44J	Triminoes constructive algorithms, greedy	2000	x507
237D	T-decomposition dfs and similar, graphs, greedy, trees	2000	x500
838B	Diverging Directions data structures, dfs and similar, trees	2100	x495
335C	More Reclamation games	2100	x487
215E	Periodical Numbers combinatorics, dp, number theory	2100	x482
45E	Director constructive algorithms, greedy	2000	x481
241C	Mirror Box geometry, implementation	2000	x476
48E	Ivan the Fool VS Gorynych the Dragon dp, games, graphs	2100	x469
342D	Xenia and Dominoes bitmasks, dfs and similar, dp	2100	x463
73B	Need For Brake binary search, greedy, sortings	2000	x462
215C	Crosses brute force, implementation	2100	x455
690D3	The Wall (hard) dp	2100	x451
132B	Piet implementation	2100	x443
76B	Mice greedy, two pointers	2100	x443
309A	Morning run binary search, math, two pointers	2000	x435
254E	Dormitory dp, implementation	2100	x429