Problemset - Codeforces

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Codeforces Round 997 (Div. 2)
2 days
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Problems

#	Name
1699C	The Third Problem combinatorics, constructive algorithms, math	1700	x9954
1698D	Fixed Point Guessing binary search, constructive algorithms, interactive	1600	x9803
1698C	3SUM Closure brute force, data structures	1300	x18768
1697C	awoo's Favorite Problem binary search, constructive algorithms, data structures, greedy, implementation, strings, two pointers	1400	x14673
1696C	Fishingprince Plays With Array constructive algorithms, greedy, implementation, math	1400	x11848
1695C	Zero Path brute force, data structures, dp, graphs, greedy, shortest paths	1700	x11214
1693B	Fake Plastic Trees dfs and similar, dp, greedy, trees	1700	x8705
1693A	Directional Increase greedy	1300	x16434
1692H	Gambling data structures, dp, greedy, math	1700	x7698
1692G	2^Sort data structures, dp, sortings, two pointers	1400	x18867
1692F	3SUM brute force, math	1300	x23610
1691C	Sum of Substrings brute force, constructive algorithms, greedy, math, strings	1400	x15976
1690F	Shifting String graphs, math, number theory, strings	1700	x7333
1690E	Price Maximization binary search, greedy, math, two pointers	1500	x15543
1689C	Infected Tree dfs and similar, dp, trees	1600	x11551
1688C	Manipulating History constructive algorithms, greedy, strings	1700	x8289
1687B	Railway System constructive algorithms, graphs, greedy, interactive, sortings	1700	x3726
1687A	The Enchanted Forest brute force, greedy	1600	x10555
1684D	Traps constructive algorithms, greedy, sortings	1700	x9919
1684C	Column Swapping brute force, constructive algorithms, greedy, implementation, sortings	1400	x12541
1682C	LIS or Reverse LIS? constructive algorithms, greedy, implementation, math	1400	x15154
1681D	Required Length brute force, dfs and similar, dp, hashing, shortest paths	1700	x9847
1680C	Binary String binary search, greedy, strings, two pointers	1600	x10151
1679C	Rooks Defenders data structures, implementation	1400	x10584
1677B	Tokitsukaze and Meeting data structures, implementation, math	1700	x4265
1677A	Tokitsukaze and Strange Inequality brute force, data structures, dp	1600	x8607
1676H2	Maximum Crossings (Hard Version) data structures, divide and conquer, sortings	1500	x11196
1676H1	Maximum Crossings (Easy Version) brute force	1400	x14538
1676G	White-Black Balanced Subtrees dfs and similar, dp, graphs, trees	1300	x16578
1676F	Longest Strike data structures, greedy, implementation, sortings, two pointers	1300	x17513
1675E	Replace With the Previous, Minimize dsu, greedy, strings	1500	x10934
1675D	Vertical Paths graphs, implementation, trees	1300	x13333
1673C	Palindrome Basis brute force, dp, math, number theory	1500	x13366
1672D	Cyclic Rotation constructive algorithms, greedy, implementation, two pointers	1700	x6412
1671D	Insert a Progression brute force, constructive algorithms, greedy	1600	x7849
1670D	Very Suspicious binary search, brute force, geometry, greedy, implementation, math	1700	x5240
1670C	Where is the Pizza? data structures, dfs and similar, dsu, graphs, implementation, math	1400	x10141
1669H	Maximal AND bitmasks, greedy, math	1300	x20102
1667A	Make it Increasing brute force, greedy, math	1300	x14885
1665C	Tree Infection binary search, greedy, sortings, trees	1600	x8538
1661C	Water the Trees binary search, greedy, math	1700	x9570
1661B	Getting Zero bitmasks, brute force, dfs and similar, dp, graphs, greedy, shortest paths	1300	x18252
1660F1	Promising String (easy version) brute force, implementation, math, strings	1700	x7418
1660E	Matrix and Shifts brute force, constructive algorithms, greedy, implementation	1600	x7480
1660D	Maximum Product Strikes Back brute force, implementation, math, two pointers	1600	x8963
1660C	Get an Even String dp, greedy, strings	1300	x19943
1659C	Line Empire binary search, brute force, dp, greedy, implementation, math	1500	x11030
1659B	Bit Flipping bitmasks, constructive algorithms, greedy, strings	1300	x11129
1658D1	388535 (Easy Version) bitmasks, math	1600	x9252
1658C	Shinju and the Lost Permutation constructive algorithms, math	1700	x9488
1654C	Alice and the Cake data structures, greedy, implementation, sortings	1400	x13692
1651C	Fault-tolerant Network brute force, data structures, implementation	1500	x10902
1650D	Twist the Permutation brute force, constructive algorithms, implementation, math	1300	x13211
1649B	Game of Ball Passing greedy, implementation	1300	x13249
1648A	Weird Sum combinatorics, data structures, geometry, math, matrices, sortings	1400	x13532
1647C	Madoka and Childish Pranks constructive algorithms, greedy	1300	x12789
1646C	Factorials and Powers of Two bitmasks, brute force, constructive algorithms, dp, math	1500	x14729
1644D	Cross Coloring data structures, implementation, math	1700	x7390
1644C	Increase Subarray Sums brute force, dp, greedy, implementation	1400	x13975
1638C	Inversion Graph data structures, dsu, graphs, math	1300	x14886
1634B	Fortune Telling bitmasks, math	1400	x17304
1633D	Make Them Equal dp, greedy	1600	x14724
1632C	Strange Test binary search, bitmasks, brute force, dp, math	1600	x12952
1630A	And Matching bitmasks, constructive algorithms	1500	x14818
1628B	Peculiar Movie Preferences greedy, strings	1700	x11826
1628A	Meximum Array binary search, constructive algorithms, greedy, implementation, math, two pointers	1400	x15857
1627C	Not Assigning constructive algorithms, dfs and similar, number theory, trees	1400	x14803
1627B	Not Sitting games, greedy, sortings	1300	x16802
1626C	Monsters And Spells binary search, data structures, dp, greedy, implementation, math, two pointers	1700	x11086
1625C	Road Optimization dp	1700	x11017
1624D	Palindromes Coloring binary search, greedy, sortings, strings	1400	x17390
1623C	Balanced Stone Heaps binary search, greedy	1600	x12593
1622C	Set or Decrease binary search, brute force, greedy, sortings	1600	x13479
1621C	Hidden Permutations dfs and similar, interactive, math	1700	x7012
1621B	Integers Shop data structures, greedy, implementation	1500	x13639
1619E	MEX and Increments constructive algorithms, data structures, dp, greedy, implementation, math, sortings	1700	x9379
1618E	Singers' Tour constructive algorithms, math	1700	x7317
1618D	Array and Operations dp, greedy, math	1300	x19287
1617C	Paprika and Permutation binary search, greedy, math, sortings	1300	x15211
1616C	Representative Edges brute force, geometry, implementation, math	1500	x12415
1615C	Menorah brute force, graphs, greedy, math	1600	x8531
1615B	And It's Non-Zero bitmasks, greedy, math	1300	x16330
1614C	Divan and bitwise operations bitmasks, combinatorics, constructive algorithms, dp, math	1500	x10410
1612D	X-Magic Pair math, number theory	1600	x9418
1612C	Chat Ban binary search, math	1300	x18410
1611E1	Escape The Maze (easy version) dfs and similar, greedy, shortest paths, trees, two pointers	1700	x7462
1611D	Weights Assignment For Tree Edges constructive algorithms, trees	1500	x10043
1610C	Keshi Is Throwing a Party binary search, greedy	1600	x12174
1609D	Social Network dsu, graphs, greedy, implementation, trees	1600	x7434
1609C	Complex Market Analysis binary search, dp, implementation, number theory, schedules, two pointers	1400	x9862
1608C	Game Master data structures, dfs and similar, dp, graphs, greedy, two pointers	1700	x6818
1607E	Robot on the Board 1 implementation	1600	x9461
1607D	Blue-Red Permutation greedy, math, sortings	1300	x17111
1606C	Banknotes greedy, number theory	1400	x14342
1605C	Dominant Character brute force, greedy, implementation, strings	1400	x17280
1603B	Moderate Modular Mode constructive algorithms, math, number theory	1600	x13858
1603A	Di-visible Confusion constructive algorithms, math, number theory	1300	x16919
1601A	Array Elimination bitmasks, greedy, math, number theory	1300	x15388
1600J	Robot Factory bitmasks, dfs and similar	1400	x4038
1598D	Training Session combinatorics, data structures, geometry, implementation, math	1700	x8867