Problemset - Codeforces

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Codeforces Round (Div. 1 + Div. 2)
13 days

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Problems

#	Name
1632A	ABC implementation	800	x31327
1631B	Fun with Even Subarrays dp, greedy	1100	x28889
1631A	Min Max Swap greedy	800	x31547
1630F	Making It Bipartite flows, graph matchings, graphs, number theory	3400	x1025
1630E	Expected Components combinatorics, math, number theory, probabilities	2900	x654
1630D	Flipping Range constructive algorithms, dp, greedy, number theory	2400	x2124
1630C	Paint the Middle dp, greedy, sortings, two pointers	2200	x3417
1630B	Range and Partition binary search, constructive algorithms, data structures, greedy, two pointers	1800	x6581
1630A	And Matching bitmasks, constructive algorithms	1500	x16411
1629B	GCD Arrays greedy, math, number theory	800	x25608
1629A	Download More RAM brute force, greedy, sortings	800	x31179
1628F	Spaceship Crisis Management binary search, data structures, geometry, sortings	3500	x123
1628E	Groceries in Meteor Town binary search, data structures, dsu, trees	3100	x1429
1628D2	Game on Sum (Hard Version) combinatorics, dp, games, math	2400	x2726
1628D1	Game on Sum (Easy Version) combinatorics, dp, games, math	2100	x3866
1628C	Grid Xor constructive algorithms, greedy, implementation, interactive, math	2300	x3724
1628B	Peculiar Movie Preferences greedy, strings	1700	x12893
1628A	Meximum Array binary search, constructive algorithms, greedy, implementation, math, two pointers	1400	x17293
1627F	Not Splitting geometry, graphs, greedy, implementation, shortest paths	2700	x698
1627E	Not Escaping data structures, dp, implementation, shortest paths, two pointers	2200	x2927
1627D	Not Adding brute force, dp, math, number theory	1900	x9672
1627C	Not Assigning constructive algorithms, dfs and similar, number theory, trees	1400	x16601
1627B	Not Sitting games, greedy, sortings	1300	x17745
1627A	Not Shading constructive algorithms, implementation	800	x25044
1626F	A Random Code Problem combinatorics, dp, math, number theory, probabilities	2800	x938
1626E	Black and White Tree dfs and similar, greedy, trees	2400	x1979
1626D	Martial Arts Tournament binary search, brute force, greedy, math	2100	x4454
1626C	Monsters And Spells binary search, data structures, dp, greedy, implementation, math, two pointers	1700	x12065
1626B	Minor Reduction greedy, strings	1100	x24185
1626A	Equidistant Letters constructive algorithms, sortings	800	x31192
1625E2	Cats on the Upgrade (hard version) binary search, data structures, dfs and similar, graphs, trees	2800	x743
1625E1	Cats on the Upgrade (easy version) brute force, data structures, dfs and similar, divide and conquer, dp, graphs, trees	2500	x1206
1625D	Binary Spiders bitmasks, data structures, implementation, math, sortings, trees	2300	x2389
1625C	Road Optimization dp	1700	x13991
1625B	Elementary Particles brute force, greedy, sortings	1100	x16987
1625A	Ancient Civilization bitmasks, greedy, math	800	x18428
1624G	MinOr Tree bitmasks, dfs and similar, dsu, graphs, greedy	1900	x8031
1624F	Interacdive Problem binary search, constructive algorithms, interactive	2000	x3941
1624E	Masha-forgetful brute force, constructive algorithms, dp, hashing, implementation, strings	2000	x4706
1624D	Palindromes Coloring binary search, greedy, sortings, strings	1400	x19497
1624C	Division by Two and Permutation constructive algorithms, flows, graph matchings, greedy, math	1100	x27256
1624B	Make AP implementation, math	900	x57529
1624A	Plus One on the Subset math	800	x61534
1623E	Middle Duplication data structures, dfs and similar, greedy, strings, trees	2500	x1306
1623D	Robot Cleaner Revisit implementation, math, probabilities	2300	x1508
1623C	Balanced Stone Heaps binary search, greedy	1600	x14772
1623B	Game on Ranges brute force, dfs and similar, implementation, sortings	1100	x14793
1623A	Robot Cleaner brute force, implementation, math	800	x20881
1622F	Quadratic Set constructive algorithms, hashing, math, number theory	2900	x1000
1622E	Math Test bitmasks, brute force, greedy	2200	x2325
1622D	Shuffle combinatorics, math, two pointers	2000	x5025
1622C	Set or Decrease binary search, brute force, greedy, sortings	1600	x16023
1622B	Berland Music data structures, greedy, math, sortings	1000	x22549
1622A	Construct a Rectangle geometry, math	800	x32436
1621I	Two Sequences data structures, hashing, string suffix structures	3500	x152
1621H	Trains and Airplanes dfs and similar, graphs, shortest paths, trees	3500	x324
1621G	Weighted Increasing Subsequences data structures, dp, math	3200	x920
1621F	Strange Instructions data structures, greedy, implementation	2700	x666
1621E	New School binary search, data structures, dp, greedy, implementation, sortings	2300	x1966
1621D	The Winter Hike constructive algorithms, greedy, math	2100	x4455
1621C	Hidden Permutations dfs and similar, interactive, math	1700	x7588
1621B	Integers Shop data structures, greedy, implementation	1500	x14738
1621A	Stable Arrangement of Rooks constructive algorithms	800	x24890
1620G	Subsequences Galore bitmasks, combinatorics, dp	2400	x1226
1620F	Bipartite Array dp, greedy	2800	x829
1620E	Replace the Numbers constructive algorithms, data structures, dsu, implementation	1900	x10124
1620D	Exact Change brute force, constructive algorithms, greedy	2000	x4920
1620C	BA-String brute force, dp, greedy, implementation, math	1800	x7373
1620B	Triangles on a Rectangle geometry, greedy, math	1000	x34511
1620A	Equal or Not Equal constructive algorithms, dsu, implementation	800	x23427
1619H	Permutation and Queries brute force, data structures, divide and conquer, two pointers	2400	x1536
1619G	Unusual Minesweeper binary search, dfs and similar, dsu, greedy, sortings	2000	x2831
1619F	Let's Play the Hat? brute force, constructive algorithms, greedy, math	2000	x2407
1619E	MEX and Increments constructive algorithms, data structures, dp, greedy, implementation, math, sortings	1700	x10422
1619D	New Year's Problem binary search, greedy, sortings	1800	x8819
1619C	Wrong Addition implementation	1200	x23107
1619B	Squares and Cubes implementation, math	800	x33546
1619A	Square String? implementation, strings	800	x64490
1618G	Trader Problem data structures, dsu, greedy, sortings	2200	x2046
1618F	Reverse bitmasks, constructive algorithms, dfs and similar, implementation, math, strings	2000	x4829
1618E	Singers' Tour constructive algorithms, math	1700	x7883
1618D	Array and Operations dp, greedy, math	1300	x21231
1618C	Paint the Array math	1100	x35272
1618B	Missing Bigram implementation	800	x24029
1618A	Polycarp and Sums of Subsequences math, sortings	800	x34904
1617E	Christmas Chocolates dfs and similar, dp, games, graphs, implementation, math, number theory, shortest paths, trees	2700	x1082
1617D2	Too Many Impostors (hard version) constructive algorithms, implementation, interactive, math	2400	x2131
1617D1	Too Many Impostors (easy version) constructive algorithms, implementation, interactive	1800	x5280
1617C	Paprika and Permutation binary search, greedy, math, sortings	1300	x16192
1617B	GCD Problem brute force, constructive algorithms, math, number theory	900	x27582
1617A	Forbidden Subsequence constructive algorithms, greedy, sortings, strings	800	x17122
1616H	Keep XOR Low bitmasks, combinatorics, data structures, divide and conquer, dp, math	3000	x1414
1616G	Just Add an Edge dfs and similar, dp, graphs	3500	x474
1616F	Tricolor Triangles brute force, graphs, math, matrices	2900	x789
1616E	Lexicographically Small Enough brute force, data structures, greedy, strings	2200	x2776
1616D	Keep the Average High dp, greedy, math	2000	x5743
1616C	Representative Edges brute force, geometry, implementation, math	1500	x13344
1616B	Mirror in the String greedy, strings	1100	x20853
1616A	Integer Diversity implementation	800	x24108
1615H	Reindeer Games binary search, constructive algorithms, data structures, divide and conquer, flows, graphs, shortest paths	3000	x486

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