Problemset - Codeforces

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Codeforces Round 941 (Div. 1)
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Codeforces Round 941 (Div. 2)
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Problems

#	Name
665F	Four Divisors data structures, dp, math, number theory, sortings, two pointers	2400	x576
1346C	Spring Cleaning *special problem, greedy, sortings	1600	x578
1532D	Teams Forming *special problem, sortings		x579
1514E	Baby Ehab's Hyper Apartment binary search, graphs, interactive, sortings, two pointers	2700	x580
109D	Lucky Sorting constructive algorithms, sortings	2000	x615
1019D	Large Triangle binary search, geometry, sortings	2700	x624
1383D	Rearrange brute force, constructive algorithms, graphs, greedy, sortings	2800	x638
383B	Volcanoes binary search, implementation, sortings, two pointers	2500	x652
1952J	Help, what does it mean to be "Based" brute force, constructive algorithms, expression parsing, implementation, sortings		x663
1080F	Katya and Segments Sets data structures, interactive, sortings	2400	x669
101D	Castle dp, greedy, probabilities, sortings, trees	2300	x671
596D	Wilbur and Trees dp, math, probabilities, sortings	2300	x672
1949F	Dating greedy, sortings, trees		x684
1662N	Drone Photo combinatorics, math, sortings		x684
1195F	Geometers Anonymous Club data structures, geometry, math, sortings	2500	x693
35E	Parade data structures, sortings	2100	x700
15D	Map data structures, implementation, sortings	2500	x707
1107F	Vasya and Endless Credits dp, flows, graph matchings, graphs, sortings	2600	x718
1267I	Intriguing Selection brute force, constructive algorithms, implementation, interactive, sortings	2600	x727
196C	Paint Tree constructive algorithms, divide and conquer, geometry, sortings, trees	2200	x738
1776C	Library game games, greedy, interactive, sortings	2500	x750
1918F	Caterpillar on a Tree dfs and similar, graphs, greedy, implementation, sortings, trees	2500	x761
1799F	Halve or Subtract binary search, brute force, dp, greedy, sortings	2700	x765
1891E	Brukhovich and Exams brute force, greedy, implementation, math, sortings	2500	x769
639D	Bear and Contribution data structures, greedy, sortings, two pointers	2400	x777
82C	General Mobilization data structures, dfs and similar, sortings	2000	x798
1519E	Off by One constructive algorithms, dfs and similar, geometry, graphs, sortings, trees	2700	x799
1394D	Boboniu and Jianghu dp, greedy, sortings, trees	2800	x802
1805F1	Survival of the Weakest (easy version) binary search, brute force, implementation, math, sortings	2600	x806
949D	Curfew binary search, brute force, greedy, sortings	2300	x811
1612G	Max Sum Array combinatorics, constructive algorithms, greedy, sortings	2500	x813
1539F	Strange Array data structures, greedy, sortings	2600	x835
138C	Mushroom Gnomes - 2 binary search, data structures, probabilities, sortings	2200	x844
87D	Beautiful Road dfs and similar, dp, dsu, graphs, implementation, sortings, trees	2300	x844
1847F	The Boss's Identity binary search, bitmasks, data structures, dfs and similar, greedy, math, sortings	2500	x848
847F	Berland Elections greedy, sortings	2100	x848
687D	Dividing Kingdom II brute force, data structures, dsu, graphs, sortings	2500	x849
611E	New Year and Three Musketeers data structures, greedy, sortings	2400	x853
559E	Gerald and Path dp, sortings	3000	x853
529B	Group Photo 2 (online mirror version) brute force, greedy, sortings	1900	x853
1764F	Doremy's Experimental Tree brute force, constructive algorithms, dfs and similar, dsu, sortings, trees	2500	x875
332C	Students' Revenge data structures, greedy, sortings	2200	x880
958E2	Guard Duty (medium) binary search, dp, greedy, sortings	2200	x895
1129C	Morse Code binary search, data structures, dp, hashing, sortings, string suffix structures, strings	2400	x896
1374E2	Reading Books (hard version) data structures, greedy, implementation, sortings, ternary search, two pointers	2500	x897
85E	Guard Towers binary search, dsu, geometry, graphs, sortings	2600	x904
120J	Minimum Sum divide and conquer, geometry, sortings	1900	x906
644C	Hostname Aliases *special problem, binary search, data structures, implementation, sortings, strings	2100	x908
1906F	Maximize The Value data structures, sortings	2100	x919
1793E	Velepin and Marketing binary search, data structures, dp, greedy, sortings, two pointers	2600	x922
1566F	Points Movement data structures, dp, greedy, implementation, sortings	2600	x925
1725F	Field Photography bitmasks, data structures, sortings	2100	x933
1389F	Bicolored Segments data structures, dp, graph matchings, sortings	2600	x942
1503D	Flip the Cards 2-sat, constructive algorithms, data structures, greedy, sortings, two pointers	2600	x967
1354F	Summoning Minions constructive algorithms, dp, flows, graph matchings, greedy, sortings	2500	x972
268E	Playlist math, probabilities, sortings	2100	x972
1221F	Choose a Square binary search, data structures, sortings	2400	x973
1091E	New Year and the Acquaintance Estimation binary search, data structures, graphs, greedy, implementation, math, sortings	2400	x974
954F	Runner's Problem dp, matrices, sortings	2100	x975
1656F	Parametric MST binary search, constructive algorithms, graphs, greedy, math, sortings	2600	x983
159E	Zebra Tower *special problem, data structures, greedy, sortings	1700	x987
1605E	Array Equalizer binary search, greedy, implementation, math, number theory, sortings, two pointers	2400	x995
195D	Analyzing Polyline geometry, math, sortings	1900	x997
1658E	Gojou and Matrix Game data structures, dp, games, hashing, implementation, math, number theory, sortings	2500	x1001
274D	Lovely Matrix dfs and similar, graphs, greedy, sortings	2200	x1005
1936C	Pokémon Arena data structures, graphs, greedy, implementation, shortest paths, sortings	2400	x1043
1654F	Minimal String Xoration bitmasks, data structures, divide and conquer, greedy, hashing, sortings, strings	2800	x1049
1379D	New Passenger Trams binary search, brute force, data structures, sortings, two pointers	2300	x1056
119B	Before Exam constructive algorithms, implementation, sortings	1900	x1061
333E	Summer Earnings binary search, bitmasks, brute force, geometry, sortings	2500	x1066
797F	Mice and Holes data structures, dp, greedy, sortings	2600	x1078
1284E	New Year and Castle Construction combinatorics, geometry, math, sortings	2500	x1094
558D	Guess Your Way Out! II data structures, implementation, sortings	2300	x1105
33D	Knights geometry, graphs, shortest paths, sortings	2000	x1128
172C	Bus *special problem, implementation, sortings	1500	x1129
1402A	Fancy Fence *special problem, data structures, dsu, implementation, math, sortings	1800	x1132
731D	80-th Level Archeology brute force, data structures, greedy, sortings	2200	x1147
524E	Rooks and Rectangles data structures, sortings	2400	x1151
1764E	Doremy's Number Line dp, greedy, sortings	2400	x1173
243B	Hydra graphs, sortings	2000	x1174
830C	Bamboo Partition brute force, data structures, implementation, math, number theory, sortings, two pointers	2300	x1180
1607H	Banquet Preparations 2 greedy, sortings, two pointers	2200	x1187
1513F	Swapping Problem brute force, constructive algorithms, data structures, sortings	2500	x1194
648B	Собери стол constructive algorithms, sortings	800	x1195
1005E2	Median on Segments (General Case Edition) sortings	2400	x1205
1575L	Longest Array Deconstruction data structures, divide and conquer, dp, sortings	2100	x1222
793C	Mice problem geometry, implementation, math, sortings	2300	x1230
1842F	Tenzing and Tree dfs and similar, greedy, shortest paths, sortings, trees	2500	x1234
1042F	Leaf Sets data structures, dfs and similar, dsu, graphs, greedy, sortings, trees	2400	x1234
1374F	Cyclic Shifts Sorting brute force, constructive algorithms, implementation, sortings	2400	x1254
804D	Expected diameter of a tree binary search, brute force, dfs and similar, dp, sortings, trees	2500	x1256
1772G	Gaining Rating binary search, greedy, implementation, math, sortings, two pointers	2200	x1260
175C	Geometry Horse greedy, implementation, sortings, two pointers	1600	x1288
1864F	Exotic Queries data structures, implementation, sortings	2300	x1306
1039C	Network Safety dfs and similar, dsu, graphs, math, sortings	2200	x1311
1886E	I Wanna be the Team Leader bitmasks, constructive algorithms, dp, greedy, math, sortings, two pointers	2400	x1319
216D	Spider's Web binary search, sortings, two pointers	1700	x1319
1687C	Sanae and Giant Robot binary search, brute force, data structures, dsu, greedy, sortings	2500	x1335
1901E	Compressed Tree dfs and similar, dp, graphs, greedy, sortings, trees	2200	x1346
23C	Oranges and Apples constructive algorithms, sortings	2500	x1354