Problemset - Codeforces

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Pinely Round 4 (Div. 1 + Div. 2)
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Problems

#	Name
1931B	Make Equal greedy	800	x31313
1931A	Recovering a Small String brute force, strings	800	x34954
1930I	Counting Is Fun combinatorics	3500	x66
1930H	Interactive Mex Tree constructive algorithms, dfs and similar, interactive, trees	3300	x147
1930G	Prefix Max Set Counting data structures, dp, trees	3100	x323
1930F	Maximize the Difference bitmasks, brute force, dfs and similar	2700	x666
1930E	2..3...4.... Wonderful! Wonderful! combinatorics, dp, math	2400	x1066
1930D2	Sum over all Substrings (Hard Version) bitmasks, divide and conquer, dp, dsu, greedy, implementation, strings	2100	x2509
1930D1	Sum over all Substrings (Easy Version) brute force, dp, greedy, strings	1800	x3917
1930C	Lexicographically Largest binary search, constructive algorithms, data structures, greedy, sortings	1700	x6751
1930B	Permutation Printing brute force, constructive algorithms, math	1000	x14554
1930A	Maximise The Score greedy, sortings	800	x17964
1929F	Sasha and the Wedding Binary Search Tree brute force, combinatorics, data structures, dfs and similar, math, trees	2300	x1711
1929E	Sasha and the Happy Tree Cutting bitmasks, brute force, dfs and similar, dp, graphs, greedy, math, trees	2300	x1604
1929D	Sasha and a Walk in the City combinatorics, dp, math, trees	1900	x4474
1929C	Sasha and the Casino binary search, brute force, constructive algorithms, games, greedy, math	1400	x14116
1929B	Sasha and the Drawing constructive algorithms, greedy, math	800	x24602
1929A	Sasha and the Beautiful Array constructive algorithms, greedy, math, sortings	800	x30402
1928F	Digital Patterns combinatorics, data structures, implementation, math	2900	x230
1928E	Modular Sequence brute force, constructive algorithms, dp, graphs, greedy, math, number theory	2300	x1622
1928D	Lonely Mountain Dungeons brute force, data structures, greedy, math, ternary search	1900	x4016
1928C	Physical Education Lesson brute force, math, number theory	1600	x8074
1928B	Equalize binary search, greedy, sortings, two pointers	1200	x16441
1928A	Rectangle Cutting geometry, math	800	x21988
1927G	Paint Charges data structures, dp, greedy, math	2300	x1580
1927F	Microcycle data structures, dfs and similar, dsu, graphs, greedy, implementation, sortings, trees	1900	x4126
1927E	Klever Permutation constructive algorithms, math, two pointers	1400	x13299
1927D	Find the Different Ones! binary search, brute force, data structures, dp, dsu, greedy, two pointers	1300	x19928
1927C	Choose the Different Ones! brute force, greedy, math	1000	x26869
1927B	Following the String constructive algorithms, greedy, strings	900	x31895
1927A	Make it White greedy, strings	800	x41545
1926G	Vlad and Trouble at MIT dfs and similar, dp, flows, graphs, greedy, implementation, trees	1900	x3304
1926F	Vlad and Avoiding X bitmasks, brute force, dfs and similar, dp, implementation	2200	x1603
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x11154
1926D	Vlad and Division bitmasks, greedy	1300	x14694
1926C	Vlad and a Sum of Sum of Digits dp, implementation	1200	x25025
1926B	Vlad and Shapes geometry, implementation	800	x31306
1926A	Vlad and the Best of Five implementation	800	x45124
1925D	Good Trip combinatorics, dp, math, probabilities	1900	x3435
1925B	A Balanced Problemset? brute force, greedy, math, number theory	1200	x19203
1925A	We Got Everything Covered! constructive algorithms, greedy, strings	800	x28056
1924F	Anti-Proxy Attendance constructive algorithms, dp, interactive, ternary search	3500	x142
1924E	Paper Cutting Again combinatorics, probabilities	3100	x414
1924D	Balanced Subsequences combinatorics, dp, math	2700	x914
1924C	Fractal Origami geometry, math, matrices	2400	x1099
1924B	Space Harbour data structures, implementation, math, sortings	2100	x2404
1924A	Did We Get Everything Covered? constructive algorithms, dp, greedy, shortest paths, strings	1500	x13181
1923F	Shrink-Reverse binary search, brute force, greedy, hashing, implementation, string suffix structures, strings	2800	x359
1923E	Count Paths data structures, dfs and similar, dp, dsu, graphs, trees	2000	x3502
1923D	Slimes binary search, constructive algorithms, data structures, greedy, two pointers	1800	x6359
1923C	Find B constructive algorithms, greedy	1400	x14221
1923B	Monsters Attack! dp, greedy, implementation	1100	x17053
1923A	Moving Chips greedy, implementation	800	x24020
1922F	Replace on Segment dp, graph matchings	2500	x1293
1922E	Increasing Subsequences bitmasks, constructive algorithms, divide and conquer, greedy, math	1800	x7382
1922D	Berserk Monsters brute force, data structures, dsu, implementation, math	1900	x5458
1922C	Closest Cities greedy, implementation, math	1300	x17748
1922B	Forming Triangles combinatorics, constructive algorithms, math, sortings	1200	x19881
1922A	Tricky Template constructive algorithms, implementation, strings	800	x26488
1921G	Mischievous Shooter brute force, data structures, divide and conquer, dp, implementation	2200	x1188
1921F	Sum of Progression brute force, data structures, dp, implementation, math	1900	x3650
1921E	Eat the Chip brute force, games, greedy, math	1600	x9374
1921D	Very Different Array data structures, greedy, sortings, two pointers	1100	x20908
1921C	Sending Messages greedy, math	900	x28443
1921B	Arranging Cats greedy, implementation	800	x32982
1921A	Square greedy, math	800	x41589
1920F2	Smooth Sailing (Hard Version) binary search, data structures, dsu, geometry, graphs, trees	3000	x434
1920F1	Smooth Sailing (Easy Version) binary search, brute force, data structures, dfs and similar, dsu, graphs, shortest paths	2500	x919
1920E	Counting Binary Strings combinatorics, dp, math	2100	x2507
1920D	Array Repetition binary search, brute force, dsu, implementation, math	1900	x5345
1920C	Partitioning the Array brute force, math, number theory	1600	x12728
1920B	Summation Game games, greedy, math, sortings	1100	x20104
1920A	Satisfying Constraints brute force, greedy, math	800	x27166
1919H	Tree Diameter interactive, trees	2000	x137
1919G	Tree LGM constructive algorithms, divide and conquer, games, trees	3500	x176
1919F2	Wine Factory (Hard Version) data structures, dp, flows, greedy, matrices	2800	x786
1919F1	Wine Factory (Easy Version) data structures, greedy	2300	x2099
1919E	Counting Prefixes combinatorics, constructive algorithms, dp, implementation, math	2600	x817
1919D	01 Tree constructive algorithms, data structures, dsu, greedy, sortings, trees	2100	x3718
1919C	Grouping Increases data structures, dp, greedy	1400	x17909
1919B	Plus-Minus Split greedy	800	x29342
1919A	Wallet Exchange games, math	800	x32554
1918G	Permutation of Given constructive algorithms, math	2700	x440
1918F	Caterpillar on a Tree dfs and similar, graphs, greedy, implementation, sortings, trees	2500	x825
1918E	ace5 and Task Order constructive algorithms, divide and conquer, implementation, interactive, probabilities, sortings	2200	x1649
1918D	Blocking Elements binary search, data structures, dp, implementation, two pointers	1900	x4530
1918C	XOR-distance bitmasks, greedy, implementation, math	1400	x13354
1918B	Minimize Inversions constructive algorithms, data structures, greedy, implementation, sortings	900	x23014
1918A	Brick Wall constructive algorithms, greedy, implementation, math	800	x29522
1917F	Construct Tree bitmasks, constructive algorithms, dp, trees	2500	x933
1917E	Construct Matrix constructive algorithms, math	2500	x1322
1917D	Yet Another Inversions Problem combinatorics, data structures, dp, implementation, math, number theory	2300	x1717
1917C	Watering an Array brute force, greedy, implementation, math	1600	x9911
1917B	Erase First or Second Letter brute force, combinatorics, data structures, dp, strings	1100	x20806
1917A	Least Product constructive algorithms, math	800	x24872
1916H2	Matrix Rank (Hard Version) combinatorics, dp, math, matrices, string suffix structures	2700	x519
1916H1	Matrix Rank (Easy Version) brute force, combinatorics, dp, math, matrices	2700	x600
1916G	Optimizations From Chelsu divide and conquer, dp, number theory, trees	3500	x143
1916F	Group Division constructive algorithms, dfs and similar, graphs, greedy	2900	x439
1916E	Happy Life in University data structures, dfs and similar, greedy, trees	2300	x2158