Problemset - Codeforces

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Codeforces Round (Div. 3)
4 days

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Difficulty: —

math

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Problems

#	Name
1857D	Strong Vertices math, sortings, trees	1300	x18437
1857B	Maximum Rounding greedy, implementation, math	1100	x22481
1857A	Array Coloring greedy, math	800	x45321
1856E2	PermuTree (hard version) bitmasks, dfs and similar, dp, fft, greedy, implementation, math, trees	2700	x1335
1856B	Good Arrays implementation, math	900	x23634
1855B	Longest Divisors Interval brute force, combinatorics, greedy, math, number theory	900	x24938
1855A	Dalton the Teacher greedy, math	800	x27534
1854E	Game Bundles brute force, constructive algorithms, dp, greedy, math	3000	x389
1854C	Expected Destruction combinatorics, dp, math, probabilities	2500	x1417
1854A2	Dual (Hard Version) constructive algorithms, math	1900	x6819
1854A1	Dual (Easy Version) constructive algorithms, math	1400	x13670
1853B	Fibonaccharsis binary search, brute force, math	1200	x16910
1853A	Desorting brute force, greedy, math	800	x29719
1852C	Ina of the Mountain data structures, dp, greedy, math	2400	x1484
1852B	Imbalanced Arrays constructive algorithms, graphs, greedy, math, sortings, two pointers	1800	x4273
1852A	Ntarsis' Set binary search, math, number theory	1800	x7768
1851F	Lisa and the Martians bitmasks, greedy, math, strings, trees	1800	x5532
1851D	Prefix Permutation Sums implementation, math	1300	x14713
1851A	Escalator Conversations brute force, constructive algorithms, math	800	x29064
1850G	The Morning Star combinatorics, data structures, geometry, implementation, math, sortings	1500	x11715
1850F	We Were Both Children brute force, implementation, math, number theory	1300	x18012
1850E	Cardboard for Pictures binary search, geometry, implementation, math	1100	x21786
1849B	Monsters greedy, math, sortings	1000	x23929
1849A	Morning Sandwich implementation, math	800	x27414
1848F	Vika and Wiki binary search, bitmasks, combinatorics, divide and conquer, dp, math	2400	x1490
1848E	Vika and Stone Skipping brute force, implementation, math, number theory	2600	x761
1848D	Vika and Bonuses binary search, brute force, math, ternary search	2200	x2550
1848C	Vika and Price Tags math, number theory	1800	x6121
1848B	Vika and the Bridge binary search, data structures, greedy, implementation, math, sortings	1200	x14012
1848A	Vika and Her Friends games, math	900	x16492
1847F	The Boss's Identity binary search, bitmasks, data structures, dfs and similar, greedy, math, sortings	2500	x867
1847E	Triangle Platinum? brute force, combinatorics, implementation, interactive, math, probabilities	2900	x321
1846E2	Rudolf and Snowflakes (hard version) binary search, brute force, implementation, math	1800	x6758
1846E1	Rudolf and Snowflakes (simple version) brute force, implementation, math	1300	x15971
1846D	Rudolph and Christmas Tree constructive algorithms, geometry, math	1200	x18755
1846A	Rudolph and Cut the Rope implementation, math	800	x31940
1845F	Swimmers in the Pool dp, fft, math, number theory	2800	x359
1845E	Boxes and Balls dp, implementation, math	2500	x1290
1845D	Rating System binary search, brute force, data structures, dp, dsu, greedy, math, two pointers	1800	x7524
1845B	Come Together geometry, implementation, math	900	x21188
1845A	Forbidden Integer constructive algorithms, implementation, math, number theory	800	x25663
1844H	Multiple of Three Cycles combinatorics, data structures, dp, dsu, math	3400	x133
1844G	Tree Weights bitmasks, constructive algorithms, data structures, dfs and similar, implementation, math, matrices, number theory, trees	3000	x674
1844F2	Min Cost Permutation (Hard Version) binary search, constructive algorithms, data structures, greedy, math, sortings	2800	x377
1844F1	Min Cost Permutation (Easy Version) brute force, constructive algorithms, greedy, math	2600	x748
1844D	Row Major constructive algorithms, greedy, math, number theory, strings	1400	x11943
1844C	Particles dp, greedy, implementation, math	1300	x15168
1844B	Permutations & Primes constructive algorithms, math	1000	x17755
1843F2	Omsk Metro (hard version) data structures, dfs and similar, divide and conquer, dp, math, trees	2300	x1517
1843F1	Omsk Metro (simple version) data structures, dfs and similar, dp, graphs, greedy, math, trees	1800	x5119
1843D	Apple Tree combinatorics, dfs and similar, dp, math, trees	1200	x17422
1843C	Sum in Binary Tree bitmasks, combinatorics, math, trees	800	x31924
1843B	Long Long greedy, math, two pointers	800	x28434
1842H	Tenzing and Random Real Numbers bitmasks, dp, graphs, math, probabilities	3000	x583
1842G	Tenzing and Random Operations combinatorics, dp, math, probabilities	2800	x960
1842E	Tenzing and Triangle data structures, dp, geometry, greedy, math	2300	x1561
1842B	Tenzing and Books bitmasks, greedy, math	1100	x16291
1842A	Tenzing and Tsondu games, math	800	x19614
1841E	Fill the Matrix data structures, greedy, math	2200	x1929
1841C	Ranom Numbers brute force, dp, greedy, math, strings	1800	x7482
1840G2	In Search of Truth (Hard Version) constructive algorithms, interactive, math, meet-in-the-middle, probabilities	2500	x914
1840G1	In Search of Truth (Easy Version) constructive algorithms, interactive, math, meet-in-the-middle, probabilities	2200	x2270
1840C	Ski Resort combinatorics, math, two pointers	1000	x25851
1840B	Binary Cafe bitmasks, combinatorics, math	1100	x21944
1839A	The Good Array greedy, implementation, math	800	x17246
1838E	Count Supersequences combinatorics, dp, math	2500	x1396
1838C	No Prime Differences constructive algorithms, math, number theory	1400	x13858
1838B	Minimize Permutation Subarrays constructive algorithms, math	1100	x16065
1838A	Blackboard List constructive algorithms, math	800	x21265
1837A	Grasshopper on a Line constructive algorithms, math	800	x30457
1836B	Astrophysicists greedy, math	1100	x12431
1835D	Doctor's Brown Hypothesis dfs and similar, graphs, math, number theory	2900	x462
1835C	Twin Clusters bitmasks, brute force, constructive algorithms, math, probabilities	2600	x952
1835B	Lottery binary search, brute force, greedy, math, two pointers	2500	x922
1835A	k-th equality brute force, implementation, math	1700	x7604
1834F	Typewriter brute force, math	2500	x498
1834E	MEX of LCM binary search, data structures, implementation, math, number theory	2300	x2119
1834C	Game with Reversing games, greedy, math, strings	1200	x12929
1834B	Maximum Strength greedy, math	1000	x14839
1834A	Unit Array greedy, math	800	x22619
1833F	Ira and Flamenco combinatorics, constructive algorithms, data structures, implementation, math, sortings, two pointers	1700	x6999
1833C	Vlad Building Beautiful Array greedy, math	800	x25765
1832D2	Red-Blue Operations (Hard Version) binary search, constructive algorithms, greedy, implementation, math	2400	x1838
1832D1	Red-Blue Operations (Easy Version) binary search, greedy, implementation, math	2100	x2850
1830E	Bully Sort data structures, math	3500	x235
1830C	Hyperregular Bracket Strings combinatorics, greedy, hashing, math, number theory, sortings	2400	x1571
1830B	The BOSS Can Count Pairs brute force, math	2000	x4711
1829H	Don't Blame Me bitmasks, combinatorics, dp, math	1700	x7358
1829G	Hits Different data structures, dp, implementation, math	1600	x9819
1829F	Forever Winter dfs and similar, graphs, math	1300	x16711
1828B	Permutation Swap math, number theory	900	x21611
1828A	Divisible Array constructive algorithms, math	800	x23269
1827A	Counting Orders combinatorics, math, sortings, two pointers	1100	x18100
1826F	Fading into Fog geometry, interactive, math, probabilities	2800	x343
1826C	Dreaming of Freedom greedy, math, number theory	1300	x13096
1826B	Lunatic Never Content math, number theory	1100	x16515
1825B	LuoTianyi and the Table greedy, math	1000	x14376
1824B2	LuoTianyi and the Floating Islands (Hard Version) combinatorics, dfs and similar, math, probabilities, trees	2300	x2532
1824B1	LuoTianyi and the Floating Islands (Easy Version) combinatorics, math, probabilities, trees	1800	x4419
1823F	Random Walk dp, graphs, math, probabilities, trees	2600	x817