Problemset - Codeforces

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Codeforces Round 945 (Div. 2)
4 days

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Difficulty: —

math

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Problems

#	Name
1843D	Apple Tree combinatorics, dfs and similar, dp, math, trees	1200	x17054
1843C	Sum in Binary Tree bitmasks, combinatorics, math, trees	800	x31126
1843B	Long Long greedy, math, two pointers	800	x28059
1842H	Tenzing and Random Real Numbers bitmasks, dp, graphs, math, probabilities	3000	x561
1842G	Tenzing and Random Operations combinatorics, dp, math, probabilities	2800	x928
1842E	Tenzing and Triangle data structures, dp, geometry, greedy, math	2300	x1539
1842B	Tenzing and Books bitmasks, greedy, math	1100	x15679
1842A	Tenzing and Tsondu games, math	800	x19467
1841E	Fill the Matrix data structures, greedy, math	2200	x1884
1841C	Ranom Numbers brute force, dp, greedy, math, strings	1800	x7316
1840G2	In Search of Truth (Hard Version) constructive algorithms, interactive, math, meet-in-the-middle, probabilities	2500	x901
1840G1	In Search of Truth (Easy Version) constructive algorithms, interactive, math, meet-in-the-middle, probabilities	2200	x2234
1840C	Ski Resort combinatorics, math, two pointers	1000	x24659
1840B	Binary Cafe bitmasks, combinatorics, math	1100	x21526
1839A	The Good Array greedy, implementation, math	800	x17101
1838E	Count Supersequences combinatorics, dp, math	2500	x1372
1838C	No Prime Differences constructive algorithms, math, number theory	1400	x13452
1838B	Minimize Permutation Subarrays constructive algorithms, math	1100	x15831
1838A	Blackboard List constructive algorithms, math	800	x21066
1837A	Grasshopper on a Line constructive algorithms, math	800	x29170
1836B	Astrophysicists greedy, math	1100	x12278
1835D	Doctor's Brown Hypothesis dfs and similar, graphs, math, number theory	2900	x449
1835C	Twin Clusters bitmasks, brute force, constructive algorithms, math, probabilities	2600	x939
1835B	Lottery binary search, brute force, greedy, math, two pointers	2500	x903
1835A	k-th equality brute force, implementation, math	1700	x7456
1834F	Typewriter brute force, math	2500	x488
1834E	MEX of LCM binary search, data structures, implementation, math, number theory	2300	x2066
1834C	Game with Reversing games, greedy, math, strings	1200	x12650
1834B	Maximum Strength greedy, math	1000	x14542
1834A	Unit Array greedy, math	800	x21249
1833F	Ira and Flamenco combinatorics, constructive algorithms, data structures, implementation, math, sortings, two pointers	1700	x6717
1833C	Vlad Building Beautiful Array greedy, math	800	x25529
1832D2	Red-Blue Operations (Hard Version) binary search, constructive algorithms, greedy, implementation, math	2400	x1797
1832D1	Red-Blue Operations (Easy Version) binary search, greedy, implementation, math	2100	x2794
1830E	Bully Sort data structures, math	3500	x231
1830C	Hyperregular Bracket Strings combinatorics, greedy, hashing, math, number theory, sortings	2400	x1529
1830B	The BOSS Can Count Pairs brute force, math	2000	x4601
1829H	Don't Blame Me bitmasks, combinatorics, dp, math	1700	x7091
1829G	Hits Different data structures, dp, implementation, math	1600	x9422
1829F	Forever Winter dfs and similar, graphs, math	1300	x16205
1828B	Permutation Swap math, number theory	900	x20686
1828A	Divisible Array constructive algorithms, math	800	x23013
1827A	Counting Orders combinatorics, math, sortings, two pointers	1100	x17506
1826F	Fading into Fog geometry, interactive, math, probabilities	2800	x338
1826C	Dreaming of Freedom greedy, math, number theory	1300	x12803
1826B	Lunatic Never Content math, number theory	1100	x15769
1825B	LuoTianyi and the Table greedy, math	1000	x14176
1824B2	LuoTianyi and the Floating Islands (Hard Version) combinatorics, dfs and similar, math, probabilities, trees	2300	x2495
1824B1	LuoTianyi and the Floating Islands (Easy Version) combinatorics, math, probabilities, trees	1800	x4335
1823F	Random Walk dp, graphs, math, probabilities, trees	2600	x788
1823E	Removing Graph brute force, dp, games, graphs, math	2500	x1199
1823D	Unique Palindromes constructive algorithms, math, strings	1900	x3653
1823C	Strongly Composite greedy, math, number theory	1300	x11675
1823B	Sort with Step brute force, math, sortings	900	x15332
1823A	A-characteristic combinatorics, constructive algorithms, math	800	x15813
1822G2	Magic Triples (Hard Version) brute force, data structures, math, number theory	2200	x2312
1822G1	Magic Triples (Easy Version) brute force, data structures, math, number theory	1700	x6503
1822E	Making Anti-Palindromes greedy, math, strings	1600	x9716
1822D	Super-Permutation constructive algorithms, math	1200	x15914
1822C	Bun Lover math	800	x22323
1822B	Karina and Array greedy, math, sortings	800	x24092
1821F	Timber combinatorics, dp, fft, math	2600	x705
1821D	Black Cells binary search, brute force, greedy, math	1900	x4757
1821C	Tear It Apart brute force, implementation, math, strings	1300	x13602
1821A	Matching combinatorics, math	800	x19375
1820B	JoJo's Incredible Adventures math, strings, two pointers	1100	x13408
1819E	Roads in E City interactive, math, probabilities, trees	3200	x244
1819C	The Fox and the Complete Tree Traversal constructive algorithms, dp, implementation, math, trees	2400	x1396
1817C	Similar Polynomials combinatorics, math	2400	x926
1815F	OH NO1 (-2-3-4) constructive algorithms, graphs, math	3500	x214
1815E	Bosco and Particle dp, math, number theory, strings	3100	x326
1815D	XOR Counting bitmasks, combinatorics, dp, math	2600	x1037
1815A	Ian and Array Sorting greedy, math	1300	x13466
1814D	Balancing Weapons binary search, brute force, data structures, math, two pointers	2500	x819
1814B	Long Legs brute force, math	1700	x9538
1814A	Coins implementation, math	800	x25717
1812E	Not a Geometry Problem special problem, special problem, constructive algorithms, geometry, math		x3947
1812D	Trivial Conjecture *special problem, constructive algorithms, math, number theory		x4339
1811G2	Vlad and the Nice Paths (hard version) binary search, combinatorics, data structures, dp, math, two pointers	2200	x1621
1811G1	Vlad and the Nice Paths (easy version) combinatorics, dp, math	2100	x1916
1811E	Living Sequence binary search, dp, math, number theory	1500	x11577
1811D	Umka and a Long Flight constructive algorithms, implementation, math	1600	x7049
1811B	Conveyor Belts implementation, math	1000	x19740
1811A	Insert Digit greedy, math, strings	800	x30054
1810H	Last Number combinatorics, math	2900	x129
1810F	M-tree data structures, math, sortings, trees	2800	x541
1810D	Climbing the Tree binary search, math	1700	x7097
1810B	Candies constructive algorithms, math, number theory	800	x17145
1809G	Prediction combinatorics, dp, math	2800	x411
1809E	Two Tanks binary search, dp, implementation, math	2400	x792
1809C	Sum on Subarrays constructive algorithms, greedy, math	1500	x11936
1809B	Points on Plane binary search, greedy, math	1000	x19054
1808E3	Minibuses on Venus (hard version) brute force, combinatorics, dp, math	2800	x419
1808B	Playing in a Casino math, sortings	1200	x14693
1806F2	GCD Master (hard version) greedy, math, sortings	2900	x267
1806F1	GCD Master (easy version) greedy, math, number theory, sortings	2900	x328
1806D	DSU Master combinatorics, dp, dsu, math	2500	x849
1806C	Sequence Master brute force, constructive algorithms, math	1600	x7203
1806A	Walking Master geometry, greedy, math	800	x22328
1805F2	Survival of the Weakest (hard version) greedy, math, sortings, two pointers	3100	x327