Problemset - Codeforces

→ Pay attention

Before contest
Helvetic Coding Contest 2024 online mirror (teams allowed, unrated)
11:48:59
Register now »

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1957C	How Does the Rook Move? combinatorics, dp, math	1600	x6985
1948C	Arrow Path brute force, constructive algorithms, dfs and similar, dp, graphs, shortest paths	1300	x14207
1946C	Tree Cutting binary search, dp, greedy, implementation, trees	1600	x8933
1945D	Seraphim the Owl dp, greedy	1300	x11921
1941E	Rudolf and k Bridges binary search, data structures, dp, two pointers	1600	x8057
1937B	Binary Path dp, greedy, implementation	1300	x12961
1927D	Find the Different Ones! binary search, brute force, data structures, dp, dsu, greedy, two pointers	1300	x18142
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x9874
1924A	Did We Get Everything Covered? constructive algorithms, dp, greedy, shortest paths, strings	1500	x12263
1919C	Grouping Increases data structures, dp, greedy	1400	x16735
1900C	Anji's Binary Tree dfs and similar, dp, trees	1300	x10376
1895C	Torn Lucky Ticket brute force, dp, hashing, implementation, math	1400	x10069
1881E	Block Sequence dp	1500	x11603
1879C	Make it Alternating combinatorics, dp, greedy	1300	x14856
1875D	Jellyfish and Mex dp	1600	x7533
1872E	Data Structures Fan binary search, bitmasks, data structures, dp	1500	x11862
1870C	Colorful Table binary search, data structures, dp, implementation, math, two pointers	1300	x10700
1860C	Game on Permutation data structures, dp, games, greedy	1400	x12379
1858B	The Walkway brute force, dp, greedy, math, number theory	1500	x10601
1856C	To Become Max binary search, brute force, data structures, dp	1600	x11016
1851E	Nastya and Potions dfs and similar, dp, graphs, sortings	1500	x9407
1847C	Vampiric Powers, anyone? bitmasks, brute force, dp, greedy	1400	x12195
1845C	Strong Password binary search, dp, greedy, strings	1400	x13299
1844C	Particles dp, greedy, implementation, math	1300	x14790
1842C	Tenzing and Balls dp	1500	x11620
1830A	Copil Copac Draws Trees dfs and similar, dp, graphs, trees	1400	x12402
1829G	Hits Different data structures, dp, implementation, math	1600	x9353
1811E	Living Sequence binary search, dp, math, number theory	1500	x11526
1789C	Serval and Toxel's Arrays combinatorics, dp, implementation, math	1500	x8054
1787C	Remove the Bracket dp, greedy, math	1600	x6693
1774C	Ice and Fire constructive algorithms, dp, greedy	1300	x11541
1771B	Hossam and Friends binary search, constructive algorithms, dp, two pointers	1400	x12790
1769C2	Подкрутка II *special problem, dp	1300	x912
1767D	Playoff combinatorics, constructive algorithms, dp, greedy, math	1500	x9394
1766C	Hamiltonian Wall dp, implementation	1300	x13069
1759E	The Humanoid brute force, dp, sortings	1500	x9908
1753A2	Make Nonzero Sum (hard version) constructive algorithms, dp, greedy	1500	x9764
1753A1	Make Nonzero Sum (easy version) constructive algorithms, dp, greedy	1300	x14268
1748C	Zero-Sum Prefixes brute force, data structures, dp, greedy, implementation	1600	x10420
1741E	Sending a Sequence Over the Network dp	1600	x10758
1739C	Card Game combinatorics, constructive algorithms, dp, games	1500	x8690
1738C	Even Number Addicts dp, games, greedy, math	1500	x10522
1722E	Counting Rectangles brute force, data structures, dp, implementation	1600	x10010
1714D	Color with Occurrences brute force, data structures, dp, greedy, strings	1600	x8588
1706C	Qpwoeirut And The City dp, flows, greedy, implementation	1400	x14422
1703G	Good Key, Bad Key bitmasks, brute force, dp, greedy, math	1600	x9974
1703F	Yet Another Problem About Pairs Satisfying an Inequality binary search, data structures, dp, greedy, sortings	1300	x18108
1692G	2^Sort data structures, dp, sortings, two pointers	1400	x15863
1689C	Infected Tree dfs and similar, dp, trees	1600	x10470
1677A	Tokitsukaze and Strange Inequality brute force, data structures, dp	1600	x8104
1676G	White-Black Balanced Subtrees dfs and similar, dp, graphs, trees	1300	x14133
1673C	Palindrome Basis brute force, dp, math, number theory	1500	x11664
1661B	Getting Zero bitmasks, brute force, dfs and similar, dp, graphs, greedy, shortest paths	1300	x16955
1660C	Get an Even String dp, greedy, strings	1300	x18730
1659C	Line Empire binary search, brute force, dp, greedy, implementation, math	1500	x9634
1646C	Factorials and Powers of Two bitmasks, brute force, constructive algorithms, dp, math	1500	x13125
1644C	Increase Subarray Sums brute force, dp, greedy, implementation	1400	x13334
1633D	Make Them Equal dp, greedy	1600	x12974
1632C	Strange Test binary search, bitmasks, brute force, dp, math	1600	x12230
1618D	Array and Operations dp, greedy, math	1300	x18255
1614C	Divan and bitwise operations bitmasks, combinatorics, constructive algorithms, dp, math	1500	x9905
1609C	Complex Market Analysis binary search, dp, implementation, number theory, schedules, two pointers	1400	x9474
1567C	Carrying Conundrum bitmasks, combinatorics, dp, math	1600	x11827
1555D	Say No to Palindromes brute force, constructive algorithms, dp, strings	1600	x11729
1555C	Coin Rows brute force, constructive algorithms, dp, implementation	1300	x20841
1553D	Backspace dp, greedy, strings, two pointers	1500	x13307
1553B	Reverse String brute force, dp, hashing, implementation, strings	1300	x13810
1547E	Air Conditioners data structures, dp, implementation, shortest paths, sortings, two pointers	1500	x13805
1538F	Interesting Function binary search, dp, math, number theory	1500	x18314
1537E1	Erase and Extend (Easy Version) binary search, brute force, dp, greedy, hashing, implementation, string suffix structures, strings, two pointers	1600	x12232
1536C	Diluc and Kaeya data structures, dp, hashing, number theory	1500	x13535
1535C	Unstable String binary search, dp, greedy, implementation, strings, two pointers	1400	x16067
1534C	Little Alawn's Puzzle combinatorics, dp, dsu, graphs, math	1300	x12482
1528A	Parsa's Humongous Tree dfs and similar, divide and conquer, dp, greedy, trees	1600	x13839
1526C1	Potions (Easy Version) brute force, data structures, dp, greedy	1500	x21158
1526B	I Hate 1111 dp, math, number theory	1400	x28623
1519D	Maximum Sum of Products brute force, dp, implementation, math, two pointers	1600	x14559
1516B	AGAGA XOOORRR bitmasks, brute force, dp, greedy	1500	x18048
1513C	Add One dp, matrices	1600	x13178
1498C	Planar Reflections brute force, data structures, dp	1600	x9163
1492C	Maximum width binary search, data structures, dp, greedy, two pointers	1500	x15550
1476C	Longest Simple Cycle dp, graphs, greedy	1600	x11036
1470A	Strange Birthday Party binary search, dp, greedy, sortings, two pointers	1300	x21214
1469C	Building a Fence dp, greedy, implementation, two pointers	1600	x10485
1466C	Canine poetry dp, greedy, strings	1300	x17294
1461C	Random Events dp, math, probabilities	1500	x10841
1461B	Find the Spruce brute force, dp, implementation	1400	x12353
1459B	Move and Turn dp, math	1300	x13884
1455D	Sequence and Swaps dp, greedy, sortings	1600	x11979
1452D	Radio Towers combinatorics, dp, math	1600	x7748
1451C	String Equality dp, greedy, hashing, implementation, strings	1400	x15198
1443B	Saving the City dp, greedy, math, sortings	1300	x15469
1420C1	Pokémon Army (easy version) constructive algorithms, dp, greedy	1300	x17005
1418C	Mortal Kombat Tower dp, graphs, greedy, shortest paths	1500	x18134
1415C	Bouncing Ball brute force, dp, implementation	1400	x10643
1408C	Discrete Acceleration binary search, dp, implementation, math, two pointers	1500	x8621
1398C	Good Subarrays data structures, dp, math	1600	x24109
1395C	Boboniu and Bit Operations bitmasks, brute force, dp, greedy	1600	x13496
1391C	Cyclic Permutations combinatorics, dp, graphs, math	1500	x14538
1389C	Good String brute force, dp, greedy, two pointers	1500	x18343

←