Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round 968 (Div. 2)
34:16:42
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1630D	Flipping Range constructive algorithms, dp, greedy, number theory	2400	x1580
1630C	Paint the Middle dp, greedy, sortings, two pointers	2200	x2905
1628D2	Game on Sum (Hard Version) combinatorics, dp, games, math	2400	x2033
1628D1	Game on Sum (Easy Version) combinatorics, dp, games, math	2100	x3106
1627E	Not Escaping data structures, dp, implementation, shortest paths, two pointers	2200	x2326
1627D	Not Adding brute force, dp, math, number theory	1900	x8169
1626F	A Random Code Problem combinatorics, dp, math, number theory, probabilities	2800	x726
1625E1	Cats on the Upgrade (easy version) brute force, data structures, dfs and similar, divide and conquer, dp, graphs, trees	2500	x1028
1624E	Masha-forgetful brute force, constructive algorithms, dp, hashing, implementation, strings	2000	x4055
1621G	Weighted Increasing Subsequences data structures, dp, math	3200	x645
1621E	New School binary search, data structures, dp, greedy, implementation, sortings	2300	x1752
1620G	Subsequences Galore bitmasks, combinatorics, dp	2400	x882
1620F	Bipartite Array dp, greedy	2800	x600
1620C	BA-String brute force, dp, greedy, implementation, math	1800	x6508
1617E	Christmas Chocolates dfs and similar, dp, games, graphs, implementation, math, number theory, shortest paths, trees	2700	x857
1616H	Keep XOR Low bitmasks, combinatorics, data structures, divide and conquer, dp, math	3000	x900
1616G	Just Add an Edge dfs and similar, dp, graphs	3500	x273
1616D	Keep the Average High dp, greedy, math	2000	x4843
1615F	LEGOndary Grandmaster combinatorics, dp, math	2800	x863
1614D2	Divan and Kostomuksha (hard version) dp, number theory	2300	x2277
1614D1	Divan and Kostomuksha (easy version) dp, number theory	2100	x3812
1613D	MEX Sequences dp, math	1900	x4553
1612F	Armor and Weapons brute force, dp, greedy, shortest paths	2800	x588
1612E	Messages brute force, dp, greedy, probabilities, sortings	2000	x2473
1611E2	Escape The Maze (hard version) dfs and similar, dp, greedy, shortest paths, trees	1900	x3783
1610D	Not Quite Lee combinatorics, dp, math, number theory	2000	x2678
1609E	William The Oblivious bitmasks, data structures, dp, matrices	2400	x2034
1608F	MEX counting combinatorics, dp, implementation	3200	x580
1606F	Tree Queries brute force, dp, trees	2800	x551
1606E	Arena combinatorics, dp, math	2100	x3472
1605F	PalindORme combinatorics, dp	2900	x301
1603F	October 18, 2017 combinatorics, dp, implementation, math	2700	x273
1603E	A Perfect Problem combinatorics, dp, math	3200	x415
1603D	Artistic Partition divide and conquer, dp, number theory	3000	x660
1603C	Extreme Extension dp, greedy, math, number theory	2300	x2018
1601E	Phys Ed Online data structures, dp, greedy	2900	x473
1601D	Difficult Mountain data structures, dp, greedy, sortings	2700	x1434
1601C	Optimal Insertion data structures, divide and conquer, dp, greedy, sortings	2300	x1989
1601B	Frog Traveler data structures, dfs and similar, dp, graphs, shortest paths, two pointers	1900	x4910
1598F	RBS binary search, bitmasks, brute force, data structures, dp	2400	x1403
1598E	Staircases brute force, combinatorics, data structures, dfs and similar, dp, implementation, math	2100	x2280
1594E2	Rubik's Cube Coloring (hard version) brute force, dp, implementation, math, trees	2300	x1470
1593G	Changing Brackets constructive algorithms, data structures, dp, greedy	2200	x1671
1593F	Red-Black Number dfs and similar, dp, implementation, math, meet-in-the-middle	2100	x2415
1585G	Poachers dp, games, graphs, trees	2500	x175
1585F	Non-equal Neighbours combinatorics, dp, math	2400	x1198
1584F	Strange LCS bitmasks, dp, graphs, greedy, strings	2600	x920
1582F2	Korney Korneevich and XOR (hard version) binary search, brute force, dp, greedy, two pointers	2400	x1775
1582F1	Korney Korneevich and XOR (easy version) bitmasks, dp, greedy	1800	x5482
1582E	Pchelyonok and Segments binary search, data structures, dp, greedy, math	2000	x3689
1580D	Subsequence brute force, divide and conquer, dp, greedy, trees	2900	x852
1580B	Mathematics Curriculum brute force, combinatorics, dp, trees	2600	x1021
1579G	Minimal Coverage dp	2200	x2339
1575L	Longest Array Deconstruction data structures, divide and conquer, dp, sortings	2100	x1340
1575H	Holiday Wall Ornaments dp, strings	2200	x601
1575D	Divisible by Twenty-Five brute force, dfs and similar, dp	1800	x2478
1574F	Occurrences combinatorics, dfs and similar, dp, dsu, fft, graphs	2700	x612
1572E	Polygon binary search, dp, geometry	3000	x284
1572C	Paint dp, greedy	2700	x1438
1572A	Book binary search, brute force, data structures, dp, graphs, implementation, sortings	1800	x8846
1571G	A Battle Against a Dragon *special problem, data structures, dp	2500	x75
1571F	Kotlinforces *special problem, constructive algorithms, dp	2000	x182
1569F	Palindromic Hamiltonian Path brute force, dfs and similar, dp, graphs, hashing	3000	x236
1566H	Xor-quiz constructive algorithms, dp, interactive, math, number theory	3200	x129
1566F	Points Movement data structures, dp, greedy, implementation, sortings	2600	x945
1566E	Buds Re-hanging constructive algorithms, dfs and similar, dp, greedy, trees	2000	x4090
1562E	Rescue Niwen! dp, greedy, string suffix structures, strings	2500	x1389
1560F2	Nearest Beautiful Number (hard version) bitmasks, brute force, constructive algorithms, dfs and similar, dp, greedy	2100	x4332
1559E	Mocha and Stars combinatorics, dp, fft, math, number theory	2200	x2280
1558B	Up the Strip brute force, dp, math, number theory, two pointers	1900	x4748
1557D	Ezzat and Grid data structures, dp, greedy	2200	x2532
1556F	Sports Betting bitmasks, combinatorics, dp, graphs, math, probabilities	2500	x1212
1556E	Equilibrium data structures, dp, greedy	2200	x2685
1554E	You dfs and similar, dp, math, number theory	2600	x1210
1553I	Stairs combinatorics, divide and conquer, dp, fft, math	3400	x203
1552F	Telepanting binary search, data structures, dp, sortings	2200	x2868
1552D	Array Differentiation bitmasks, brute force, constructive algorithms, dfs and similar, dp, graphs, math	1800	x6924
1551F	Equidistant Vertices brute force, combinatorics, dfs and similar, dp, trees	2200	x1813
1551E	Fixed Points binary search, brute force, dp	2000	x3846
1550F	Jumping Around binary search, data structures, divide and conquer, dp, dsu, graphs, shortest paths	2700	x663
1550E	Stringforces binary search, bitmasks, brute force, dp, strings, two pointers	2500	x1513
1548C	The Three Little Pigs combinatorics, dp, fft, math	2500	x1812
1547G	How Many Paths? dfs and similar, dp, graphs, trees	2100	x2973
1545F	AquaMoon and Potatoes brute force, data structures, dp	3500	x106
1545E2	AquaMoon and Time Stop (hard version) data structures, dp	3500	x83
1545E1	AquaMoon and Time Stop (easy version) data structures, dp	3500	x79
1542E2	Abnormal Permutation Pairs (hard version) combinatorics, dp, fft, math	2700	x840
1542E1	Abnormal Permutation Pairs (easy version) combinatorics, dp, fft, math	2400	x1223
1542D	Priority Queue combinatorics, dp, implementation, math, ternary search	2200	x2589
1540C2	Converging Array (Hard Version) dp, math	2900	x452
1540C1	Converging Array (Easy Version) dp, math	2700	x611
1540B	Tree Array brute force, combinatorics, dp, graphs, math, probabilities, trees	2300	x2549
1539E	Game with Cards binary search, constructive algorithms, data structures, dp, greedy, implementation	2500	x938
1535E	Gold Transfer binary search, data structures, dp, greedy, interactive, trees	2200	x2712
1535D	Playoff Tournament data structures, dfs and similar, dp, implementation, trees	1800	x7655
1534H	Lost Nodes constructive algorithms, dp, graphs, interactive, sortings, trees	3500	x147
1534G	A New Beginning data structures, dp, geometry, sortings	3300	x556
1534F2	Falling Sand (Hard Version) dfs and similar, dp, graphs, greedy	3000	x532
1530H	Turing's Award data structures, dp	3400	x153
1530F	Bingo bitmasks, combinatorics, dp, math, probabilities	2600	x772