Problemset - Codeforces

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Codeforces Round (Div. 3)
6 days

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Problems

#	Name
1647F	Madoka and Laziness dp, greedy	3100	x379
1646E	Power Board brute force, dp, math, number theory	2200	x2318
1646D	Weight the Tree constructive algorithms, dfs and similar, dp, implementation, trees	2000	x3598
1637F	Towers constructive algorithms, dfs and similar, dp, greedy, trees	2500	x1711
1630D	Flipping Range constructive algorithms, dp, greedy, number theory	2400	x1530
1630C	Paint the Middle dp, greedy, sortings, two pointers	2200	x2865
1628D2	Game on Sum (Hard Version) combinatorics, dp, games, math	2400	x2002
1628D1	Game on Sum (Easy Version) combinatorics, dp, games, math	2100	x3048
1627E	Not Escaping data structures, dp, implementation, shortest paths, two pointers	2200	x2258
1626F	A Random Code Problem combinatorics, dp, math, number theory, probabilities	2800	x716
1625E1	Cats on the Upgrade (easy version) brute force, data structures, dfs and similar, divide and conquer, dp, graphs, trees	2500	x982
1624E	Masha-forgetful brute force, constructive algorithms, dp, hashing, implementation, strings	2000	x3989
1621G	Weighted Increasing Subsequences data structures, dp, math	3200	x627
1621E	New School binary search, data structures, dp, greedy, implementation, sortings	2300	x1735
1620G	Subsequences Galore bitmasks, combinatorics, dp	2400	x866
1620F	Bipartite Array dp, greedy	2800	x591
1617E	Christmas Chocolates dfs and similar, dp, games, graphs, implementation, math, number theory, shortest paths, trees	2700	x843
1616H	Keep XOR Low bitmasks, combinatorics, data structures, divide and conquer, dp, math	3000	x805
1616G	Just Add an Edge dfs and similar, dp, graphs	3500	x268
1616D	Keep the Average High dp, greedy, math	2000	x4753
1615F	LEGOndary Grandmaster combinatorics, dp, math	2800	x771
1614D2	Divan and Kostomuksha (hard version) dp, number theory	2300	x2207
1614D1	Divan and Kostomuksha (easy version) dp, number theory	2100	x3690
1612F	Armor and Weapons brute force, dp, greedy, shortest paths	2800	x577
1612E	Messages brute force, dp, greedy, probabilities, sortings	2000	x2417
1610D	Not Quite Lee combinatorics, dp, math, number theory	2000	x2623
1609E	William The Oblivious bitmasks, data structures, dp, matrices	2400	x1887
1608F	MEX counting combinatorics, dp, implementation	3200	x527
1606F	Tree Queries brute force, dp, trees	2800	x522
1606E	Arena combinatorics, dp, math	2100	x3398
1605F	PalindORme combinatorics, dp	2900	x293
1603F	October 18, 2017 combinatorics, dp, implementation, math	2700	x269
1603E	A Perfect Problem combinatorics, dp, math	3200	x407
1603D	Artistic Partition divide and conquer, dp, number theory	3000	x624
1603C	Extreme Extension dp, greedy, math, number theory	2300	x1992
1601E	Phys Ed Online data structures, dp, greedy	2900	x467
1601D	Difficult Mountain data structures, dp, greedy, sortings	2700	x1402
1601C	Optimal Insertion data structures, divide and conquer, dp, greedy, sortings	2300	x1943
1598F	RBS binary search, bitmasks, brute force, data structures, dp	2400	x1333
1598E	Staircases brute force, combinatorics, data structures, dfs and similar, dp, implementation, math	2100	x2255
1594E2	Rubik's Cube Coloring (hard version) brute force, dp, implementation, math, trees	2300	x1455
1593G	Changing Brackets constructive algorithms, data structures, dp, greedy	2200	x1641
1593F	Red-Black Number dfs and similar, dp, implementation, math, meet-in-the-middle	2100	x2374
1585G	Poachers dp, games, graphs, trees	2500	x172
1585F	Non-equal Neighbours combinatorics, dp, math	2400	x1165
1584F	Strange LCS bitmasks, dp, graphs, greedy, strings	2600	x884
1582F2	Korney Korneevich and XOR (hard version) binary search, brute force, dp, greedy, two pointers	2400	x1733
1582E	Pchelyonok and Segments binary search, data structures, dp, greedy, math	2000	x3617
1580D	Subsequence brute force, divide and conquer, dp, greedy, trees	2900	x770
1580B	Mathematics Curriculum brute force, combinatorics, dp, trees	2600	x987
1579G	Minimal Coverage dp	2200	x2291
1575L	Longest Array Deconstruction data structures, divide and conquer, dp, sortings	2100	x1300
1575H	Holiday Wall Ornaments dp, strings	2200	x590
1574F	Occurrences combinatorics, dfs and similar, dp, dsu, fft, graphs	2700	x593
1572E	Polygon binary search, dp, geometry	3000	x281
1572C	Paint dp, greedy	2700	x1400
1571G	A Battle Against a Dragon *special problem, data structures, dp	2500	x74
1571F	Kotlinforces *special problem, constructive algorithms, dp	2000	x179
1569F	Palindromic Hamiltonian Path brute force, dfs and similar, dp, graphs, hashing	3000	x231
1566H	Xor-quiz constructive algorithms, dp, interactive, math, number theory	3200	x126
1566F	Points Movement data structures, dp, greedy, implementation, sortings	2600	x932
1566E	Buds Re-hanging constructive algorithms, dfs and similar, dp, greedy, trees	2000	x4041
1562E	Rescue Niwen! dp, greedy, string suffix structures, strings	2500	x1346
1560F2	Nearest Beautiful Number (hard version) bitmasks, brute force, constructive algorithms, dfs and similar, dp, greedy	2100	x4236
1559E	Mocha and Stars combinatorics, dp, fft, math, number theory	2200	x2232
1557D	Ezzat and Grid data structures, dp, greedy	2200	x2489
1556F	Sports Betting bitmasks, combinatorics, dp, graphs, math, probabilities	2500	x1187
1556E	Equilibrium data structures, dp, greedy	2200	x2524
1554E	You dfs and similar, dp, math, number theory	2600	x1191
1553I	Stairs combinatorics, divide and conquer, dp, fft, math	3400	x198
1552F	Telepanting binary search, data structures, dp, sortings	2200	x2815
1551F	Equidistant Vertices brute force, combinatorics, dfs and similar, dp, trees	2200	x1769
1551E	Fixed Points binary search, brute force, dp	2000	x3738
1550F	Jumping Around binary search, data structures, divide and conquer, dp, dsu, graphs, shortest paths	2700	x636
1550E	Stringforces binary search, bitmasks, brute force, dp, strings, two pointers	2500	x1459
1548C	The Three Little Pigs combinatorics, dp, fft, math	2500	x1764
1547G	How Many Paths? dfs and similar, dp, graphs, trees	2100	x2897
1545F	AquaMoon and Potatoes brute force, data structures, dp	3500	x106
1545E2	AquaMoon and Time Stop (hard version) data structures, dp	3500	x81
1545E1	AquaMoon and Time Stop (easy version) data structures, dp	3500	x75
1542E2	Abnormal Permutation Pairs (hard version) combinatorics, dp, fft, math	2700	x819
1542E1	Abnormal Permutation Pairs (easy version) combinatorics, dp, fft, math	2400	x1199
1542D	Priority Queue combinatorics, dp, implementation, math, ternary search	2200	x2544
1540C2	Converging Array (Hard Version) dp, math	2900	x442
1540C1	Converging Array (Easy Version) dp, math	2700	x603
1540B	Tree Array brute force, combinatorics, dp, graphs, math, probabilities, trees	2300	x2508
1539E	Game with Cards binary search, constructive algorithms, data structures, dp, greedy, implementation	2500	x928
1535E	Gold Transfer binary search, data structures, dp, greedy, interactive, trees	2200	x2651
1534H	Lost Nodes constructive algorithms, dp, graphs, interactive, sortings, trees	3500	x145
1534G	A New Beginning data structures, dp, geometry, sortings	3300	x538
1534F2	Falling Sand (Hard Version) dfs and similar, dp, graphs, greedy	3000	x525
1530H	Turing's Award data structures, dp	3400	x146
1530F	Bingo bitmasks, combinatorics, dp, math, probabilities	2600	x754
1528E	Mashtali and Hagh Trees combinatorics, dp, trees	2900	x513
1527E	Partition Game binary search, data structures, divide and conquer, dp	2500	x2115
1525F	Goblins And Gnomes brute force, dp, flows, graph matchings	2800	x320
1525E	Assimilation IV combinatorics, dp, math, probabilities, two pointers	2100	x1997
1523H	Hopping Around the Array data structures, dp	3500	x235
1523F	Favorite Game bitmasks, dp	3300	x405
1523E	Crypto Lights combinatorics, dp, math, probabilities	2600	x1548