Problemset - Codeforces

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Problems

#	Name
1931F	Chat Screenshots combinatorics, dfs and similar, graphs	1700	x6889
1931E	Anna and the Valentine's Day Gift games, greedy, math, sortings	1400	x13216
1931D	Divisible Pairs combinatorics, math, number theory	1300	x15716
1931C	Make Equal Again brute force, greedy, math	1000	x25910
1931B	Make Equal greedy	800	x29860
1931A	Recovering a Small String brute force, strings	800	x33411
1930I	Counting Is Fun combinatorics	3500	x50
1930H	Interactive Mex Tree constructive algorithms, dfs and similar, interactive, trees	3300	x118
1930G	Prefix Max Set Counting data structures, dp, trees	3100	x244
1930F	Maximize the Difference bitmasks, brute force, dfs and similar	2700	x606
1930E	2..3...4.... Wonderful! Wonderful! combinatorics, dp, math	2400	x981
1930D2	Sum over all Substrings (Hard Version) bitmasks, divide and conquer, dp, dsu, greedy, implementation, strings	2100	x2349
1930D1	Sum over all Substrings (Easy Version) brute force, dp, greedy, strings	1800	x3663
1930C	Lexicographically Largest binary search, constructive algorithms, data structures, greedy, sortings	1700	x6373
1930B	Permutation Printing brute force, constructive algorithms, math	1000	x13499
1930A	Maximise The Score greedy, sortings	800	x17064
1929F	Sasha and the Wedding Binary Search Tree brute force, combinatorics, data structures, dfs and similar, math, trees	2300	x1611
1929E	Sasha and the Happy Tree Cutting bitmasks, brute force, dfs and similar, dp, graphs, greedy, math, trees	2300	x1490
1929D	Sasha and a Walk in the City combinatorics, dp, math, trees	1900	x4134
1929C	Sasha and the Casino binary search, brute force, constructive algorithms, games, greedy, math	1400	x13148
1929B	Sasha and the Drawing constructive algorithms, greedy, math	800	x23694
1929A	Sasha and the Beautiful Array constructive algorithms, greedy, math, sortings	800	x28768
1928F	Digital Patterns combinatorics, data structures, implementation, math	2900	x209
1928E	Modular Sequence brute force, constructive algorithms, dp, graphs, greedy, math, number theory	2300	x1527
1928D	Lonely Mountain Dungeons brute force, data structures, greedy, math, ternary search	1900	x3713
1928C	Physical Education Lesson brute force, math, number theory	1600	x7421
1928B	Equalize binary search, greedy, sortings, two pointers	1200	x15150
1928A	Rectangle Cutting geometry, math	800	x21075
1927G	Paint Charges data structures, dp, greedy, math	2300	x1483
1927F	Microcycle data structures, dfs and similar, dsu, graphs, greedy, implementation, sortings, trees	1900	x3755
1927E	Klever Permutation constructive algorithms, math, two pointers	1400	x12320
1927D	Find the Different Ones! binary search, brute force, data structures, dp, dsu, greedy, two pointers	1300	x18149
1927C	Choose the Different Ones! brute force, greedy, math	1000	x25438
1927B	Following the String constructive algorithms, greedy, strings	900	x30216
1927A	Make it White greedy, strings	800	x39537
1926G	Vlad and Trouble at MIT dfs and similar, dp, flows, graphs, greedy, implementation, trees	1900	x2909
1926F	Vlad and Avoiding X bitmasks, brute force, dfs and similar, dp, implementation	2200	x1462
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x9886
1926D	Vlad and Division bitmasks, greedy	1300	x13412
1926C	Vlad and a Sum of Sum of Digits dp, implementation	1200	x22867
1926B	Vlad and Shapes geometry, implementation	800	x29541
1926A	Vlad and the Best of Five implementation	800	x41613
1925D	Good Trip combinatorics, dp, math, probabilities	1900	x3199
1925B	A Balanced Problemset? brute force, greedy, math, number theory	1200	x18141
1925A	We Got Everything Covered! constructive algorithms, greedy, strings	800	x27084
1924F	Anti-Proxy Attendance constructive algorithms, dp, interactive, ternary search	3500	x123
1924E	Paper Cutting Again combinatorics, probabilities	3100	x386
1924D	Balanced Subsequences combinatorics, dp, math	2700	x762
1924C	Fractal Origami geometry, math, matrices	2400	x1030
1924B	Space Harbour data structures, implementation, math, sortings	2100	x2267
1924A	Did We Get Everything Covered? constructive algorithms, dp, greedy, shortest paths, strings	1500	x12268
1923F	Shrink-Reverse binary search, brute force, greedy, hashing, implementation, string suffix structures, strings	2800	x325
1923E	Count Paths data structures, dfs and similar, dp, dsu, graphs, trees	2000	x3142
1923D	Slimes binary search, constructive algorithms, data structures, greedy, two pointers	1800	x5840
1923C	Find B constructive algorithms, greedy	1400	x13028
1923B	Monsters Attack! dp, greedy, implementation	1100	x16078
1923A	Moving Chips greedy, implementation	800	x23164
1922F	Replace on Segment dp, graph matchings	2500	x1159
1922E	Increasing Subsequences bitmasks, constructive algorithms, divide and conquer, greedy, math	1800	x7010
1922D	Berserk Monsters brute force, data structures, dsu, implementation, math	1900	x5194
1922C	Closest Cities greedy, implementation, math	1300	x16789
1922B	Forming Triangles combinatorics, constructive algorithms, math, sortings	1200	x18949
1922A	Tricky Template constructive algorithms, implementation, strings	800	x25825
1921G	Mischievous Shooter brute force, data structures, divide and conquer, dp, implementation	2200	x1114
1921F	Sum of Progression brute force, data structures, dp, implementation, math	1900	x3420
1921E	Eat the Chip brute force, games, greedy, math	1600	x8866
1921D	Very Different Array data structures, greedy, sortings, two pointers	1100	x19899
1921C	Sending Messages greedy, math	900	x27197
1921B	Arranging Cats greedy, implementation	800	x31893
1921A	Square greedy, math	800	x39783
1920F2	Smooth Sailing (Hard Version) binary search, data structures, dsu, geometry, graphs, trees	3000	x397
1920F1	Smooth Sailing (Easy Version) binary search, brute force, data structures, dfs and similar, dsu, graphs, shortest paths	2500	x871
1920E	Counting Binary Strings combinatorics, dp, math	2100	x2345
1920D	Array Repetition binary search, brute force, dsu, implementation, math	1900	x5077
1920C	Partitioning the Array brute force, math, number theory	1600	x11756
1920B	Summation Game games, greedy, math, sortings	1100	x19186
1920A	Satisfying Constraints brute force, greedy, math	800	x26417
1919H	Tree Diameter interactive, trees	2000	x128
1919G	Tree LGM constructive algorithms, divide and conquer, games, trees	3500	x170
1919F2	Wine Factory (Hard Version) data structures, dp, flows, greedy, matrices	2800	x737
1919F1	Wine Factory (Easy Version) data structures, greedy	2300	x2019
1919E	Counting Prefixes combinatorics, constructive algorithms, dp, implementation, math	2600	x771
1919D	01 Tree constructive algorithms, data structures, dsu, greedy, sortings, trees	2100	x3587
1919C	Grouping Increases data structures, dp, greedy	1400	x16739
1919B	Plus-Minus Split greedy	800	x28757
1919A	Wallet Exchange games, math	800	x31655
1918G	Permutation of Given constructive algorithms, math	2700	x419
1918F	Caterpillar on a Tree dfs and similar, graphs, greedy, implementation, sortings, trees	2500	x765
1918E	ace5 and Task Order constructive algorithms, divide and conquer, implementation, interactive, probabilities, sortings	2200	x1537
1918D	Blocking Elements binary search, data structures, dp, implementation, two pointers	1900	x4232
1918C	XOR-distance bitmasks, greedy, implementation, math	1400	x12468
1918B	Minimize Inversions constructive algorithms, data structures, greedy, implementation, sortings	900	x22008
1918A	Brick Wall constructive algorithms, greedy, implementation, math	800	x28665
1917F	Construct Tree bitmasks, constructive algorithms, dp, trees	2500	x894
1917E	Construct Matrix constructive algorithms, math	2500	x1262
1917D	Yet Another Inversions Problem combinatorics, data structures, dp, implementation, math, number theory	2300	x1651
1917C	Watering an Array brute force, greedy, implementation, math	1600	x9348
1917B	Erase First or Second Letter brute force, combinatorics, data structures, dp, strings	1100	x19299
1917A	Least Product constructive algorithms, math	800	x24137
1916H2	Matrix Rank (Hard Version) combinatorics, dp, math, matrices, string suffix structures	2700	x502