Problemset - Codeforces

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Codeforces Round 941 (Div. 1)
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Codeforces Round 941 (Div. 2)
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Problems

#	Name
1838E	Count Supersequences combinatorics, dp, math	2500	x1353
1838C	No Prime Differences constructive algorithms, math, number theory	1400	x13355
1838B	Minimize Permutation Subarrays constructive algorithms, math	1100	x15772
1838A	Blackboard List constructive algorithms, math	800	x21008
1837A	Grasshopper on a Line constructive algorithms, math	800	x28898
1836B	Astrophysicists greedy, math	1100	x12241
1835D	Doctor's Brown Hypothesis dfs and similar, graphs, math, number theory	2900	x441
1835C	Twin Clusters bitmasks, brute force, constructive algorithms, math, probabilities	2600	x931
1835B	Lottery binary search, brute force, greedy, math, two pointers	2500	x893
1835A	k-th equality brute force, implementation, math	1700	x7395
1834F	Typewriter brute force, math	2500	x487
1834E	MEX of LCM binary search, data structures, implementation, math, number theory	2300	x2038
1834C	Game with Reversing games, greedy, math, strings	1200	x12561
1834B	Maximum Strength greedy, math	1000	x14454
1834A	Unit Array greedy, math	800	x20960
1833F	Ira and Flamenco combinatorics, constructive algorithms, data structures, implementation, math, sortings, two pointers	1700	x6608
1833C	Vlad Building Beautiful Array greedy, math	800	x25441
1832D2	Red-Blue Operations (Hard Version) binary search, constructive algorithms, greedy, implementation, math	2400	x1781
1832D1	Red-Blue Operations (Easy Version) binary search, greedy, implementation, math	2100	x2777
1830E	Bully Sort data structures, math	3500	x225
1830C	Hyperregular Bracket Strings combinatorics, greedy, hashing, math, number theory, sortings	2400	x1505
1830B	The BOSS Can Count Pairs brute force, math	2000	x4565
1829H	Don't Blame Me bitmasks, combinatorics, dp, math	1700	x6984
1829G	Hits Different data structures, dp, implementation, math	1600	x9304
1829F	Forever Winter dfs and similar, graphs, math	1300	x16029
1828B	Permutation Swap math, number theory	900	x20473
1828A	Divisible Array constructive algorithms, math	800	x22841
1827A	Counting Orders combinatorics, math, sortings, two pointers	1100	x17356
1826F	Fading into Fog geometry, interactive, math, probabilities	2800	x336
1826C	Dreaming of Freedom greedy, math, number theory	1300	x12722
1826B	Lunatic Never Content math, number theory	1100	x15609
1825B	LuoTianyi and the Table greedy, math	1000	x14128
1824B2	LuoTianyi and the Floating Islands (Hard Version) combinatorics, dfs and similar, math, probabilities, trees	2300	x2470
1824B1	LuoTianyi and the Floating Islands (Easy Version) combinatorics, math, probabilities, trees	1800	x4301
1823F	Random Walk dp, graphs, math, probabilities, trees	2600	x766
1823E	Removing Graph brute force, dp, games, graphs, math	2500	x1189
1823D	Unique Palindromes constructive algorithms, math, strings	1900	x3633
1823C	Strongly Composite greedy, math, number theory	1300	x11617
1823B	Sort with Step brute force, math, sortings	900	x15264
1823A	A-characteristic combinatorics, constructive algorithms, math	800	x15769
1822G2	Magic Triples (Hard Version) brute force, data structures, math, number theory	2200	x2282
1822G1	Magic Triples (Easy Version) brute force, data structures, math, number theory	1700	x6435
1822E	Making Anti-Palindromes greedy, math, strings	1600	x9629
1822D	Super-Permutation constructive algorithms, math	1200	x15832
1822C	Bun Lover math	800	x22232
1822B	Karina and Array greedy, math, sortings	800	x24005
1821F	Timber combinatorics, dp, fft, math	2600	x697
1821D	Black Cells binary search, brute force, greedy, math	1900	x4728
1821C	Tear It Apart brute force, implementation, math, strings	1300	x13526
1821A	Matching combinatorics, math	800	x19312
1820B	JoJo's Incredible Adventures math, strings, two pointers	1100	x13260
1819E	Roads in E City interactive, math, probabilities, trees	3200	x241
1819C	The Fox and the Complete Tree Traversal constructive algorithms, dp, implementation, math, trees	2400	x1384
1817C	Similar Polynomials combinatorics, math	2400	x912
1815F	OH NO1 (-2-3-4) constructive algorithms, graphs, math	3500	x213
1815E	Bosco and Particle dp, math, number theory, strings	3100	x322
1815D	XOR Counting bitmasks, combinatorics, dp, math	2600	x1025
1815A	Ian and Array Sorting greedy, math	1300	x13383
1814D	Balancing Weapons binary search, brute force, data structures, math, two pointers	2500	x817
1814B	Long Legs brute force, math	1700	x9463
1814A	Coins implementation, math	800	x25413
1812E	Not a Geometry Problem special problem, special problem, constructive algorithms, geometry, math		x3931
1812D	Trivial Conjecture *special problem, constructive algorithms, math, number theory		x4328
1811G2	Vlad and the Nice Paths (hard version) binary search, combinatorics, data structures, dp, math, two pointers	2200	x1605
1811G1	Vlad and the Nice Paths (easy version) combinatorics, dp, math	2100	x1896
1811E	Living Sequence binary search, dp, math, number theory	1500	x11481
1811D	Umka and a Long Flight constructive algorithms, implementation, math	1600	x6990
1811B	Conveyor Belts implementation, math	1000	x19668
1811A	Insert Digit greedy, math, strings	800	x29913
1810H	Last Number combinatorics, math	2900	x129
1810F	M-tree data structures, math, sortings, trees	2800	x532
1810D	Climbing the Tree binary search, math	1700	x7040
1810B	Candies constructive algorithms, math, number theory	800	x17110
1809G	Prediction combinatorics, dp, math	2800	x410
1809E	Two Tanks binary search, dp, implementation, math	2400	x789
1809C	Sum on Subarrays constructive algorithms, greedy, math	1500	x11849
1809B	Points on Plane binary search, greedy, math	1000	x18963
1808E3	Minibuses on Venus (hard version) brute force, combinatorics, dp, math	2800	x413
1808B	Playing in a Casino math, sortings	1200	x14521
1806F2	GCD Master (hard version) greedy, math, sortings	2900	x263
1806F1	GCD Master (easy version) greedy, math, number theory, sortings	2900	x326
1806D	DSU Master combinatorics, dp, dsu, math	2500	x838
1806C	Sequence Master brute force, constructive algorithms, math	1600	x7159
1806A	Walking Master geometry, greedy, math	800	x22121
1805F2	Survival of the Weakest (hard version) greedy, math, sortings, two pointers	3100	x319
1805F1	Survival of the Weakest (easy version) binary search, brute force, implementation, math, sortings	2600	x806
1805C	Place for a Selfie binary search, data structures, geometry, math	1400	x11964
1804C	Pull Your Luck brute force, greedy, math, number theory	1500	x11454
1804A	Lame King greedy, math	800	x17650
1802B	Settlement of Guinea Pigs greedy, implementation, math	1000	x12870
1801F	Another n-dimensional chocolate bar dp, math, meet-in-the-middle, number theory	2700	x544
1799G	Count Voting combinatorics, dp, math	2600	x695
1799E	City Union constructive algorithms, dfs and similar, dsu, geometry, greedy, implementation, math	2300	x1150
1799B	Equalize by Divide brute force, constructive algorithms, greedy, math	1200	x10777
1799A	Recent Actions data structures, greedy, implementation, math	800	x11335
1798F	Gifts from Grandfather Ahmed dp, math, number theory	2500	x466
1798D	Shocking Arrangement constructive algorithms, greedy, math	1600	x8969
1798C	Candy Store greedy, math, number theory	1700	x7743
1797E	Li Hua and Array brute force, data structures, dsu, math, number theory, two pointers	2300	x1176
1796F	Strange Triples brute force, math, number theory	2900	x166