Problemset - Codeforces

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Educational Codeforces Round 169 (Rated for Div. 2)
16:31:05
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Problems

#	Name
1722F	L-shapes dfs and similar, implementation	1700	x6808
1722E	Counting Rectangles brute force, data structures, dp, implementation	1600	x10583
1721C	Min-Max Array Transformation binary search, greedy, two pointers	1400	x13224
1719C	Fighting Tournament binary search, data structures, implementation, two pointers	1400	x13091
1717C	Madoka and Formal Statement greedy	1300	x14526
1715C	Monoblock combinatorics, data structures, implementation, math	1700	x8525
1714G	Path Prefixes binary search, data structures, dfs and similar, trees	1700	x7423
1714E	Add Modulo 10 brute force, math, number theory	1400	x16151
1714D	Color with Occurrences brute force, data structures, dp, greedy, strings	1600	x8967
1711B	Party brute force, graphs	1300	x13300
1710A	Color the Picture constructive algorithms, greedy, math	1500	x10788
1709D	Rorororobot binary search, data structures, greedy, math	1700	x8310
1707A	Doremy's IQ binary search, constructive algorithms, greedy, implementation	1600	x13358
1706D1	Chopping Carrots (Easy Version) binary search, brute force, constructive algorithms, greedy, number theory	1700	x6835
1706C	Qpwoeirut And The City dp, flows, greedy, implementation	1400	x14690
1705C	Mark and His Unfinished Essay brute force, implementation	1400	x13223
1703G	Good Key, Bad Key bitmasks, brute force, dp, greedy, math	1600	x10458
1703F	Yet Another Problem About Pairs Satisfying an Inequality binary search, data structures, dp, greedy, sortings	1300	x19378
1702F	Equate Multisets constructive algorithms, data structures, greedy, math, number theory	1700	x8259
1702E	Split Into Two Sets dfs and similar, dsu, graphs	1600	x12994
1701C	Schedule Management binary search, greedy, implementation, two pointers	1400	x16548
1700C	Helping the Nature constructive algorithms, data structures, greedy	1700	x10792
1699C	The Third Problem combinatorics, constructive algorithms, math	1700	x9670
1698D	Fixed Point Guessing binary search, constructive algorithms, interactive	1600	x9032
1698C	3SUM Closure brute force, data structures	1300	x18337
1697C	awoo's Favorite Problem binary search, constructive algorithms, data structures, greedy, implementation, strings, two pointers	1400	x14212
1696C	Fishingprince Plays With Array constructive algorithms, greedy, implementation, math	1400	x11497
1695C	Zero Path brute force, data structures, dp, graphs, greedy, shortest paths	1700	x10777
1693B	Fake Plastic Trees dfs and similar, dp, greedy, trees	1700	x8341
1693A	Directional Increase greedy	1300	x15963
1692H	Gambling data structures, dp, greedy, math	1700	x7327
1692G	2^Sort data structures, dp, sortings, two pointers	1400	x17112
1692F	3SUM brute force, math	1300	x22288
1691C	Sum of Substrings brute force, constructive algorithms, greedy, math, strings	1400	x15431
1690F	Shifting String graphs, math, number theory, strings	1700	x7020
1690E	Price Maximization binary search, greedy, math, two pointers	1500	x14966
1689C	Infected Tree dfs and similar, dp, trees	1600	x11027
1688C	Manipulating History constructive algorithms, greedy, strings	1700	x8074
1687B	Railway System constructive algorithms, graphs, greedy, interactive, sortings	1700	x3576
1687A	The Enchanted Forest brute force, greedy	1600	x10258
1684D	Traps constructive algorithms, greedy, sortings	1700	x9541
1684C	Column Swapping brute force, constructive algorithms, greedy, implementation, sortings	1400	x12219
1682C	LIS or Reverse LIS? constructive algorithms, greedy, implementation, math	1400	x14543
1681D	Required Length brute force, dfs and similar, dp, hashing, shortest paths	1700	x9518
1680C	Binary String binary search, greedy, strings, two pointers	1600	x9812
1679C	Rooks Defenders data structures, implementation	1400	x10167
1677B	Tokitsukaze and Meeting data structures, implementation, math	1700	x4127
1677A	Tokitsukaze and Strange Inequality brute force, data structures, dp	1600	x8335
1676H2	Maximum Crossings (Hard Version) data structures, divide and conquer, sortings	1500	x10530
1676H1	Maximum Crossings (Easy Version) brute force	1400	x13794
1676G	White-Black Balanced Subtrees dfs and similar, dp, graphs, trees	1300	x15172
1676F	Longest Strike data structures, greedy, implementation, sortings, two pointers	1300	x16428
1675E	Replace With the Previous, Minimize dsu, greedy, strings	1500	x10487
1675D	Vertical Paths graphs, implementation, trees	1300	x12883
1673C	Palindrome Basis brute force, dp, math, number theory	1500	x12449
1672D	Cyclic Rotation constructive algorithms, greedy, implementation, two pointers	1700	x6174
1671D	Insert a Progression brute force, constructive algorithms, greedy	1600	x7557
1670D	Very Suspicious binary search, brute force, geometry, greedy, implementation, math	1700	x5063
1670C	Where is the Pizza? data structures, dfs and similar, dsu, graphs, implementation, math	1400	x9818
1669H	Maximal AND bitmasks, greedy, math	1300	x17863
1667A	Make it Increasing brute force, greedy, math	1300	x14600
1665C	Tree Infection binary search, greedy, sortings, trees	1600	x8249
1661C	Water the Trees binary search, greedy, math	1700	x9225
1661B	Getting Zero bitmasks, brute force, dfs and similar, dp, graphs, greedy, shortest paths	1300	x17481
1660F1	Promising String (easy version) brute force, implementation, math, strings	1700	x7174
1660E	Matrix and Shifts brute force, constructive algorithms, greedy, implementation	1600	x7233
1660D	Maximum Product Strikes Back brute force, implementation, math, two pointers	1600	x8526
1660C	Get an Even String dp, greedy, strings	1300	x19303
1659C	Line Empire binary search, brute force, dp, greedy, implementation, math	1500	x10230
1659B	Bit Flipping bitmasks, constructive algorithms, greedy, strings	1300	x10838
1658D1	388535 (Easy Version) bitmasks, math	1600	x8976
1658C	Shinju and the Lost Permutation constructive algorithms, math	1700	x9231
1654C	Alice and the Cake data structures, greedy, implementation, sortings	1400	x13385
1651C	Fault-tolerant Network brute force, data structures, implementation	1500	x10639
1650D	Twist the Permutation brute force, constructive algorithms, implementation, math	1300	x12898
1649B	Game of Ball Passing greedy, implementation	1300	x12935
1648A	Weird Sum combinatorics, data structures, geometry, math, matrices, sortings	1400	x12492
1647C	Madoka and Childish Pranks constructive algorithms, greedy	1300	x12521
1646C	Factorials and Powers of Two bitmasks, brute force, constructive algorithms, dp, math	1500	x13830
1644D	Cross Coloring data structures, implementation, math	1700	x7130
1644C	Increase Subarray Sums brute force, dp, greedy, implementation	1400	x13623
1638C	Inversion Graph data structures, dsu, graphs, math	1300	x14589
1634B	Fortune Telling bitmasks, math	1400	x16266
1633D	Make Them Equal dp, greedy	1600	x13718
1632C	Strange Test binary search, bitmasks, brute force, dp, math	1600	x12602
1630A	And Matching bitmasks, constructive algorithms	1500	x14402
1628B	Peculiar Movie Preferences greedy, strings	1700	x11436
1628A	Meximum Array binary search, constructive algorithms, greedy, implementation, math, two pointers	1400	x15479
1627C	Not Assigning constructive algorithms, dfs and similar, number theory, trees	1400	x14345
1627B	Not Sitting games, greedy, sortings	1300	x16502
1626C	Monsters And Spells binary search, data structures, dp, greedy, implementation, math, two pointers	1700	x10827
1625C	Road Optimization dp	1700	x10465
1624D	Palindromes Coloring binary search, greedy, sortings, strings	1400	x16750
1623C	Balanced Stone Heaps binary search, greedy	1600	x11706
1622C	Set or Decrease binary search, brute force, greedy, sortings	1600	x12775
1621C	Hidden Permutations dfs and similar, interactive, math	1700	x6835
1621B	Integers Shop data structures, greedy, implementation	1500	x13313
1619E	MEX and Increments constructive algorithms, data structures, dp, greedy, implementation, math, sortings	1700	x9047
1618E	Singers' Tour constructive algorithms, math	1700	x7105
1618D	Array and Operations dp, greedy, math	1300	x18719