Problemset - Codeforces

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Codeforces Round 977 (Div. 2, based on COMPFEST 16 - Final Round)
01:41:08
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Problems

#	Name
1919F2	Wine Factory (Hard Version) data structures, dp, flows, greedy, matrices	2800	x823
1919F1	Wine Factory (Easy Version) data structures, greedy	2300	x2166
1919E	Counting Prefixes combinatorics, constructive algorithms, dp, implementation, math	2600	x851
1919D	01 Tree constructive algorithms, data structures, dsu, greedy, sortings, trees	2100	x3856
1919C	Grouping Increases data structures, dp, greedy	1400	x18870
1919B	Plus-Minus Split greedy	800	x29666
1919A	Wallet Exchange games, math	800	x33242
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	x4749
1918C	XOR-distance bitmasks, greedy, implementation, math	1400	x13898
1918B	Minimize Inversions constructive algorithms, data structures, greedy, implementation, sortings	900	x23623
1918A	Brick Wall constructive algorithms, greedy, implementation, math	800	x30095
1917F	Construct Tree bitmasks, constructive algorithms, dp, trees	2500	x958
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	x10398
1917B	Erase First or Second Letter brute force, combinatorics, data structures, dp, strings	1100	x22109
1917A	Least Product constructive algorithms, math	800	x25374
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	x8498
1916C	Training Before the Olympiad constructive algorithms, games, greedy, implementation, math	1200	x17746
1916B	Two Divisors constructive algorithms, math, number theory	1000	x25631
1916A	2023 constructive algorithms, implementation, math, number theory	800	x25868
1915G	Bicycles graphs, greedy, implementation, shortest paths, sortings	1800	x6287
1915F	Greetings data structures, divide and conquer, sortings	1500	x13611
1915E	Romantic Glasses data structures, greedy, math	1300	x21543
1915D	Unnatural Language Processing greedy, implementation, strings	900	x30091
1915C	Can I Square? binary search, implementation	800	x42015
1915B	Not Quite Latin Square bitmasks, brute force, implementation	800	x41922
1915A	Odd One Out bitmasks, implementation	800	x56735
1914G2	Light Bulbs (Hard Version) combinatorics, data structures, dfs and similar, dp, graphs, hashing	2300	x1356
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	x4089
1914E2	Game with Marbles (Hard Version) games, greedy, sortings	1400	x12312
1914E1	Game with Marbles (Easy Version) brute force, games, greedy, sortings	1400	x12153
1914D	Three Activities brute force, dp, greedy, implementation, sortings	1200	x21581
1914C	Quests greedy, math	1100	x23927
1914B	Preparing for the Contest constructive algorithms, math	800	x30254
1914A	Problemsolving Log implementation, strings	800	x31774
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	x3139
1913C	Game with Multiset binary search, bitmasks, brute force, greedy	1300	x14937
1913B	Swap and Delete strings	1000	x26582
1913A	Rating Increase implementation	800	x23582
1912L	LOL Lovers strings	800	x7001
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	x906
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
1910I	Inverse Problem *special problem, combinatorics, dp	2700	x49
1910H	Sum of Digits of Sums *special problem, binary search, data structures	2400	x88
1910G	Pool Records *special problem, greedy	2700	x58
1910F	Build Railway Stations *special problem, greedy, trees	2000	x174
1910E	Maximum Sum Subarrays *special problem, dp	2100	x199
1910D	Remove and Add *special problem, greedy	1800	x350
1910C	Poisonous Swamp special problem, special problem, implementation, implementation	1600	x627
1910B	Security Guard *special problem, greedy	1600	x670
1910A	Username *special problem, implementation	1100	x1766
1909I	Short Permutation Problem combinatorics, dp, fft, math	1900	x118
1909H	Parallel Swaps Sort constructive algorithms, data structures	3500	x77
1909G	Pumping Lemma hashing, strings	3000	x390
1909F2	Small Permutation Problem (Hard Version) combinatorics, dp, math	2500	x929
1909F1	Small Permutation Problem (Easy Version) brute force, combinatorics, dp, math	2200	x1793
1909E	Multiple Lamps bitmasks, brute force, constructive algorithms, math, number theory	2400	x1372
1909D	Split Plus K greedy, math, number theory	1900	x4400
1909C	Heavy Intervals constructive algorithms, data structures, dsu, greedy, math, sortings	1400	x11113
1909B	Make Almost Equal With Mod bitmasks, constructive algorithms, math, number theory	1200	x16874
1909A	Distinct Buttons implementation, math	800	x16496
1907G	Lights brute force, constructive algorithms, dfs and similar, graphs, greedy, implementation	2200	x1918
1907F	Shift and Reverse greedy, sortings	1800	x4867
1907E	Good Triples brute force, combinatorics, number theory	1600	x10177
1907D	Jumping Through Segments binary search, constructive algorithms	1400	x14098
1907C	Removal of Unattractive Pairs constructive algorithms, greedy, math, strings	1200	x20123
1907B	YetnotherrokenKeoard data structures, implementation, strings	1000	x25387
1907A	Rook implementation	800	x36616
1906M	Triangle Construction greedy, math	1700	x2646
1906L	Palindromic Parentheses constructive algorithms	2500	x512
1906K	Deck-Building Game divide and conquer, math	2500	x299
1906J	Count BFS Graph combinatorics, dp	2100	x758
1906I	Contingency Plan 2 graph matchings	2900	x148
1906H	Twin Friends combinatorics, dp	2200	x700
1906G	Grid Game 2 games, number theory	2900	x197
1906F	Maximize The Value data structures, sortings	2100	x1108
1906E	Merge Not Sort constructive algorithms, dp	1900	x1535
1906D	Spaceship Exploration binary search, geometry	2800	x118