Problemset - Codeforces

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Codeforces Round (Div. 2)
7 days

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Problems

#	Name
1925B	A Balanced Problemset? brute force, greedy, math, number theory	1200	x19909
1925A	We Got Everything Covered! constructive algorithms, greedy, strings	800	x28585
1924F	Anti-Proxy Attendance constructive algorithms, dp, interactive, ternary search	3500	x151
1924E	Paper Cutting Again combinatorics, probabilities	3100	x435
1924D	Balanced Subsequences combinatorics, dp, math	2700	x1003
1924C	Fractal Origami geometry, math, matrices	2400	x1156
1924B	Space Harbour data structures, implementation, math, sortings	2100	x2534
1924A	Did We Get Everything Covered? constructive algorithms, dp, greedy, shortest paths, strings	1500	x13852
1923F	Shrink-Reverse binary search, brute force, greedy, hashing, implementation, string suffix structures, strings	2800	x375
1923E	Count Paths data structures, dfs and similar, dp, dsu, graphs, trees	2000	x3794
1923D	Slimes binary search, constructive algorithms, data structures, greedy, two pointers	1800	x6715
1923C	Find B constructive algorithms, greedy	1400	x14957
1923B	Monsters Attack! dp, greedy, implementation	1100	x17594
1923A	Moving Chips greedy, implementation	800	x24564
1922F	Replace on Segment dp, graph matchings	2500	x1393
1922E	Increasing Subsequences bitmasks, constructive algorithms, divide and conquer, greedy, math	1800	x7657
1922D	Berserk Monsters brute force, data structures, dsu, implementation, math	1900	x5656
1922C	Closest Cities greedy, implementation, math	1300	x18386
1922B	Forming Triangles combinatorics, constructive algorithms, math, sortings	1200	x20525
1922A	Tricky Template constructive algorithms, implementation, strings	800	x26892
1921G	Mischievous Shooter brute force, data structures, divide and conquer, dp, implementation	2200	x1235
1921F	Sum of Progression brute force, data structures, dp, implementation, math	1900	x3825
1921E	Eat the Chip brute force, games, greedy, math	1600	x9740
1921D	Very Different Array data structures, greedy, sortings, two pointers	1100	x21500
1921C	Sending Messages greedy, math	900	x29172
1921B	Arranging Cats greedy, implementation	800	x33562
1921A	Square greedy, math	800	x42763
1920F2	Smooth Sailing (Hard Version) binary search, data structures, dsu, geometry, graphs, trees	3000	x468
1920F1	Smooth Sailing (Easy Version) binary search, brute force, data structures, dfs and similar, dsu, graphs, shortest paths	2500	x959
1920E	Counting Binary Strings combinatorics, dp, math	2100	x2684
1920D	Array Repetition binary search, brute force, dsu, implementation, math	1900	x5571
1920C	Partitioning the Array brute force, math, number theory	1600	x13463
1920B	Summation Game games, greedy, math, sortings	1100	x20703
1920A	Satisfying Constraints brute force, greedy, math	800	x27627
1919H	Tree Diameter interactive, trees	2000	x142
1919G	Tree LGM constructive algorithms, divide and conquer, games, trees	3500	x179
1919F2	Wine Factory (Hard Version) data structures, dp, flows, greedy, matrices	2800	x825
1919F1	Wine Factory (Easy Version) data structures, greedy	2300	x2167
1919E	Counting Prefixes combinatorics, constructive algorithms, dp, implementation, math	2600	x851
1919D	01 Tree constructive algorithms, data structures, dsu, greedy, sortings, trees	2100	x3857
1919C	Grouping Increases data structures, dp, greedy	1400	x18877
1919B	Plus-Minus Split greedy	800	x29668
1919A	Wallet Exchange games, math	800	x33245
1918G	Permutation of Given constructive algorithms, math	2700	x462
1918F	Caterpillar on a Tree dfs and similar, graphs, greedy, implementation, sortings, trees	2500	x865
1918E	ace5 and Task Order constructive algorithms, divide and conquer, implementation, interactive, probabilities, sortings	2200	x1717
1918D	Blocking Elements binary search, data structures, dp, implementation, two pointers	1900	x4752
1918C	XOR-distance bitmasks, greedy, implementation, math	1400	x13900
1918B	Minimize Inversions constructive algorithms, data structures, greedy, implementation, sortings	900	x23626
1918A	Brick Wall constructive algorithms, greedy, implementation, math	800	x30100
1917F	Construct Tree bitmasks, constructive algorithms, dp, trees	2500	x959
1917E	Construct Matrix constructive algorithms, math	2500	x1373
1917D	Yet Another Inversions Problem combinatorics, data structures, dp, implementation, math, number theory	2300	x1784
1917C	Watering an Array brute force, greedy, implementation, math	1600	x10401
1917B	Erase First or Second Letter brute force, combinatorics, data structures, dp, strings	1100	x22118
1917A	Least Product constructive algorithms, math	800	x25382
1916H2	Matrix Rank (Hard Version) combinatorics, dp, math, matrices, string suffix structures	2700	x535
1916H1	Matrix Rank (Easy Version) brute force, combinatorics, dp, math, matrices	2700	x614
1916G	Optimizations From Chelsu divide and conquer, dp, number theory, trees	3500	x148
1916F	Group Division constructive algorithms, dfs and similar, graphs, greedy	2900	x453
1916E	Happy Life in University data structures, dfs and similar, greedy, trees	2300	x2249
1916D	Mathematical Problem brute force, constructive algorithms, geometry, math	1700	x8500
1916C	Training Before the Olympiad constructive algorithms, games, greedy, implementation, math	1200	x17748
1916B	Two Divisors constructive algorithms, math, number theory	1000	x25639
1916A	2023 constructive algorithms, implementation, math, number theory	800	x25872
1915G	Bicycles graphs, greedy, implementation, shortest paths, sortings	1800	x6289
1915F	Greetings data structures, divide and conquer, sortings	1500	x13617
1915E	Romantic Glasses data structures, greedy, math	1300	x21552
1915D	Unnatural Language Processing greedy, implementation, strings	900	x30100
1915C	Can I Square? binary search, implementation	800	x42029
1915B	Not Quite Latin Square bitmasks, brute force, implementation	800	x41936
1915A	Odd One Out bitmasks, implementation	800	x56766
1914G2	Light Bulbs (Hard Version) combinatorics, data structures, dfs and similar, dp, graphs, hashing	2300	x1357
1914G1	Light Bulbs (Easy Version) brute force, combinatorics, dfs and similar, dp, dsu, graphs, math, trees	2100	x1869
1914F	Programming Competition dfs and similar, dp, graph matchings, greedy, trees	1900	x4090
1914E2	Game with Marbles (Hard Version) games, greedy, sortings	1400	x12314
1914E1	Game with Marbles (Easy Version) brute force, games, greedy, sortings	1400	x12154
1914D	Three Activities brute force, dp, greedy, implementation, sortings	1200	x21584
1914C	Quests greedy, math	1100	x23940
1914B	Preparing for the Contest constructive algorithms, math	800	x30258
1914A	Problemsolving Log implementation, strings	800	x31779
1913F	Palindromic Problem binary search, data structures, hashing, string suffix structures, strings	2800	x323
1913E	Matrix Problem flows, graphs	2400	x1010
1913D	Array Collapse data structures, divide and conquer, dp, trees	2100	x3140
1913C	Game with Multiset binary search, bitmasks, brute force, greedy	1300	x14942
1913B	Swap and Delete strings	1000	x26588
1913A	Rating Increase implementation	800	x23583
1912L	LOL Lovers strings	800	x7003
1912K	Kim's Quest bitmasks, combinatorics, dp	1800	x2433
1912J	Joy of Pokémon Observation	2300	x564
1912I	Innovative Washing Machine geometry, math, two pointers	3300	x57
1912H	Hypercatapult Commute graphs	2400	x438
1912G	Great City Saint Petersburg data structures	2400	x462
1912F	Fugitive Frenzy math, probabilities	3100	x112
1912E	Evaluate It and Back Again constructive algorithms, implementation, math	2200	x907
1912D	Divisibility Test math	1900	x1464
1912C	Cactus Transformation constructive algorithms	3300	x56
1912B	Blueprint for Seating combinatorics, divide and conquer, math	2100	x1035
1912A	Accumulator Apex data structures, implementation, sortings	1900	x2079
1910J	Two Colors *special problem	2900	x48