Problemset - Codeforces

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Codeforces Round 987 (Div. 2)
07:52:30
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Problems

#	Name
1792C	Min Max Sort binary search, brute force, greedy, math, two pointers	1500	x14284
1791G2	Teleporters (Hard Version) binary search, greedy, sortings	1900	x4836
1791F	Range Update Point Query binary search, brute force, data structures	1500	x12611
1790E	Vlad and a Pair of Numbers bitmasks, constructive algorithms	1400	x15317
1789C	Serval and Toxel's Arrays combinatorics, dp, implementation, math	1500	x8651
1788C	Matching Numbers constructive algorithms, greedy, math	1300	x17442
1787D	Game on Axis combinatorics, dfs and similar, dsu, graphs, implementation	1900	x3426
1787C	Remove the Bracket dp, greedy, math	1600	x7157
1786B	Cake Assembly Line brute force, sortings	1300	x9038
1784B	Letter Exchange constructive algorithms	1900	x3358
1783C	Yet Another Tournament binary search, greedy, sortings	1700	x9403
1781D	Many Perfect Squares brute force, math, number theory	1800	x5552
1781C	Equal Frequencies brute force, constructive algorithms, greedy, implementation, sortings, strings	1600	x7721
1780D	Bit Guessing Game binary search, bitmasks, constructive algorithms, interactive	1800	x5004
1779D	Boris and His Amazing Haircut constructive algorithms, data structures, dp, dsu, greedy, sortings	1700	x7979
1779C	Least Prefix Sum data structures, greedy	1600	x12493
1778C	Flexible String bitmasks, brute force, strings	1600	x8348
1778B	The Forbidden Permutation greedy, math	1300	x13384
1777D	Score of a Tree bitmasks, combinatorics, dfs and similar, dp, math, probabilities, trees	1900	x3548
1777C	Quiz Master binary search, math, number theory, sortings, two pointers	1700	x8726
1776L	Controllers binary search, math	1500	x6207
1776H	Beppa and SwerChat two pointers	1300	x6493
1776F	Train Splitting constructive algorithms, graphs, greedy	1700	x3515
1775D	Friendly Spiders dfs and similar, graphs, math, number theory, shortest paths	1800	x6362
1775C	Interesting Sequence bitmasks, math	1600	x10630
1775B	Gardener and the Array bitmasks, constructive algorithms	1300	x14126
1774E	Two Chess Pieces dfs and similar, dp, greedy, trees	1900	x3524
1774D	Same Count One brute force, constructive algorithms, greedy, implementation, two pointers	1600	x7961
1774C	Ice and Fire constructive algorithms, dp, greedy	1300	x12104
1774B	Coloring constructive algorithms, greedy, math	1500	x12390
1773K	King's Puzzle constructive algorithms	1900	x1438
1773E	Easy Assembly greedy, sortings	1400	x4948
1773A	Amazing Trick constructive algorithms, graph matchings, math, probabilities	1900	x1565
1772E	Permutation Game games	1700	x6837
1772D	Absolute Sorting constructive algorithms, math	1400	x16104
1771C	Hossam and Trainees greedy, math, number theory	1600	x9806
1771B	Hossam and Friends binary search, constructive algorithms, dp, two pointers	1400	x14682
1770C	Koxia and Number Theory brute force, chinese remainder theorem, math, number theory	1700	x8654
1769D1	Игра в Девятку I *special problem, brute force, dp	1800	x384
1769C2	Подкрутка II *special problem, dp	1300	x974
1769B2	Копирование файлов II *special problem, binary search, brute force, math	1400	x883
1768D	Lucky Permutation constructive algorithms, dfs and similar, graphs, greedy	1800	x7249
1768C	Elemental Decompress constructive algorithms, greedy, implementation, sortings	1300	x14297
1767D	Playoff combinatorics, constructive algorithms, dp, greedy, math	1500	x10004
1766D	Lucky Chains math, number theory	1600	x9006
1766C	Hamiltonian Wall dp, implementation	1300	x13727
1765N	Number Reduction greedy	1500	x4906
1765K	Torus Path greedy, math	1500	x5900
1765D	Watch the Videos binary search, constructive algorithms, two pointers	1700	x4228
1764C	Doremy's City Construction graphs, greedy	1400	x9470
1762C	Binary Strings are Fun combinatorics, math	1400	x9244
1761C	Set Construction constructive algorithms, dfs and similar, graphs, greedy	1400	x9649
1760G	SlavicG's Favorite Problem bitmasks, dfs and similar, graphs	1700	x7440
1760F	Quests binary search, greedy, sortings	1500	x12395
1759G	Restore the Permutation binary search, constructive algorithms, data structures, greedy, math	1900	x4526
1759F	All Possible Digits binary search, data structures, greedy, math, number theory	1800	x3961
1759E	The Humanoid brute force, dp, sortings	1500	x10942
1759D	Make It Round brute force, number theory	1400	x13852
1758D	Range = √Sum binary search, brute force, constructive algorithms, math, two pointers	1800	x7388
1758C	Almost All Multiples greedy, number theory	1400	x13752
1753B	Factorial Divisibility math, number theory	1600	x12972
1753A2	Make Nonzero Sum (hard version) constructive algorithms, dp, greedy	1500	x10467
1753A1	Make Nonzero Sum (easy version) constructive algorithms, dp, greedy	1300	x15061
1750D	Count GCD combinatorics, math, number theory	1800	x5980
1750C	Complementary XOR constructive algorithms, implementation	1400	x9598
1749D	Counting Arrays combinatorics, dp, math, number theory	1900	x5621
1749C	Number Game binary search, data structures, games, greedy, implementation	1400	x14076
1748C	Zero-Sum Prefixes brute force, data structures, dp, greedy, implementation	1600	x11231
1748B	Diverse Substrings brute force, implementation, strings	1400	x15129
1747D	Yet Another Problem binary search, bitmasks, constructive algorithms, data structures	1900	x4717
1746D	Paths on the Tree dfs and similar, dp, greedy, sortings, trees	1900	x4653
1746C	Permutation Operations constructive algorithms, greedy, implementation, math	1300	x12889
1744E2	Divisible Numbers (hard version) brute force, math, number theory	1900	x5664
1744E1	Divisible Numbers (easy version) brute force, math, number theory	1500	x10998
1743D	Problem with Random Tests brute force, dp, greedy, probabilities	1700	x7655
1742G	Orray bitmasks, brute force, greedy, math, sortings	1500	x10893
1742F	Smaller constructive algorithms, greedy, strings	1500	x11857
1741E	Sending a Sequence Over the Network dp	1600	x12528
1741D	Masha and a Beautiful Tree dfs and similar, divide and conquer, graphs, sortings, trees	1300	x15374
1740E	Hanging Hearts constructive algorithms, data structures, dfs and similar, dp, greedy, trees	1800	x4376
1740D	Knowledge Cards constructive algorithms, data structures	1500	x8162
1740C	Bricks and Bags constructive algorithms, games, greedy, sortings	1400	x11113
1739D	Reset K Edges binary search, data structures, dfs and similar, graphs, greedy, trees	1900	x5224
1739C	Card Game combinatorics, constructive algorithms, dp, games	1500	x9160
1738D	Permutation Addicts constructive algorithms, data structures, dfs and similar, dsu, graphs, trees	1900	x3456
1738C	Even Number Addicts dp, games, greedy, math	1500	x11287
1737C	Ela and Crickets constructive algorithms, games, implementation, math	1500	x5797
1737B	Ela's Fitness and the Luxury Number binary search, implementation, math	1300	x9450
1736C1	Good Subarrays (Easy Version) binary search, data structures, schedules, two pointers	1300	x15183
1735D	Meta-set brute force, combinatorics, data structures, hashing, math	1700	x5551
1735C	Phase Shift dfs and similar, dsu, graphs, greedy, implementation, strings	1400	x9967
1734D	Slime Escape data structures, dp, greedy, two pointers	1800	x6359
1733D1	Zero-One (Easy Version) constructive algorithms, greedy, math	1400	x13593
1733C	Parity Shuffle Sorting constructive algorithms, sortings	1300	x15777
1732D1	Balance (Easy version) brute force, data structures, implementation, number theory	1500	x8754
1732C1	Sheikh (Easy version) binary search, bitmasks, greedy, two pointers	1800	x5980
1731D	Valiant's New Map binary search, brute force, data structures, dp, two pointers	1700	x7235
1731C	Even Subarrays bitmasks, brute force, hashing, math, number theory	1700	x9698
1730B	Meeting on the Line binary search, geometry, greedy, implementation, math, ternary search	1600	x12949
1729F	Kirei and the Linear Function hashing, math	1900	x4184