Problemset - Codeforces

Please read the new rule regarding the restriction on the use of AI tools. ×

→ Pay attention

Before contest
Kotlin Heroes: Episode 11
19:00:32
Register now »

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1857B	Maximum Rounding greedy, implementation, math	1100	x22960
1854A1	Dual (Easy Version) constructive algorithms, math	1400	x14083
1853B	Fibonaccharsis binary search, brute force, math	1200	x17386
1851E	Nastya and Potions dfs and similar, dp, graphs, sortings	1500	x10298
1851D	Prefix Permutation Sums implementation, math	1300	x15178
1850G	The Morning Star combinatorics, data structures, geometry, implementation, math, sortings	1500	x12356
1850F	We Were Both Children brute force, implementation, math, number theory	1300	x19062
1850E	Cardboard for Pictures binary search, geometry, implementation, math	1100	x23099
1848B	Vika and the Bridge binary search, data structures, greedy, implementation, math, sortings	1200	x14894
1847C	Vampiric Powers, anyone? bitmasks, brute force, dp, greedy	1400	x12848
1846E1	Rudolf and Snowflakes (simple version) brute force, implementation, math	1300	x16844
1846D	Rudolph and Christmas Tree constructive algorithms, geometry, math	1200	x19339
1846C	Rudolf and the Another Competition constructive algorithms, data structures, dp, greedy, sortings	1200	x18860
1845C	Strong Password binary search, dp, greedy, strings	1400	x14214
1844D	Row Major constructive algorithms, greedy, math, number theory, strings	1400	x12266
1844C	Particles dp, greedy, implementation, math	1300	x15625
1843D	Apple Tree combinatorics, dfs and similar, dp, math, trees	1200	x17997
1842C	Tenzing and Balls dp	1500	x12765
1842B	Tenzing and Books bitmasks, greedy, math	1100	x17019
1840D	Wooden Toy Festival binary search, greedy, sortings	1400	x13725
1840B	Binary Cafe bitmasks, combinatorics, math	1100	x22414
1839C	Insert Zero and Invert Prefix constructive algorithms	1300	x11945
1839B	Lamps greedy, sortings	1100	x15099
1838C	No Prime Differences constructive algorithms, math, number theory	1400	x14420
1838B	Minimize Permutation Subarrays constructive algorithms, math	1100	x16383
1837D	Bracket Coloring constructive algorithms, greedy	1400	x14708
1836B	Astrophysicists greedy, math	1100	x12622
1834C	Game with Reversing games, greedy, math, strings	1200	x13258
1833D	Flipper brute force, constructive algorithms, greedy	1400	x13307
1832C	Contrast Value greedy, implementation	1200	x20667
1832B	Maximum Sum brute force, sortings, two pointers	1100	x21869
1830A	Copil Copac Draws Trees dfs and similar, dp, graphs, trees	1400	x13504
1829F	Forever Winter dfs and similar, graphs, math	1300	x17493
1829E	The Lakes dfs and similar, dsu, graphs, implementation	1100	x19966
1827A	Counting Orders combinatorics, math, sortings, two pointers	1100	x18971
1826C	Dreaming of Freedom greedy, math, number theory	1300	x13537
1826B	Lunatic Never Content math, number theory	1100	x17586
1826A	Trust Nobody brute force, greedy, implementation, sortings	1200	x15161
1824A	LuoTianyi and the Show greedy, implementation	1400	x11282
1823C	Strongly Composite greedy, math, number theory	1300	x12271
1822D	Super-Permutation constructive algorithms, math	1200	x16693
1821C	Tear It Apart brute force, implementation, math, strings	1300	x14260
1821B	Sort the Subarray brute force, greedy	1100	x18496
1820B	JoJo's Incredible Adventures math, strings, two pointers	1100	x14627
1819A	Constructive Problem brute force, greedy	1300	x12662
1817A	Almost Increasing Subsequence binary search, data structures, greedy	1500	x10998
1815A	Ian and Array Sorting greedy, math	1300	x14094
1814C	Search in Parallel constructive algorithms, greedy, sortings	1500	x10790
1811E	Living Sequence binary search, dp, math, number theory	1500	x12281
1811C	Restore the Array constructive algorithms, greedy	1100	x19808
1810C	Make It Permutation brute force, greedy, sortings	1300	x14480
1809C	Sum on Subarrays constructive algorithms, greedy, math	1500	x12733
1808B	Playing in a Casino math, sortings	1200	x16779
1807G2	Subsequence Addition (Hard Version) bitmasks, dp, greedy, implementation, sortings	1100	x19271
1807G1	Subsequence Addition (Easy Version) brute force, data structures, dp, greedy, implementation, sortings	1100	x18856
1807E	Interview binary search, implementation, interactive	1300	x12949
1805C	Place for a Selfie binary search, data structures, geometry, math	1400	x12543
1804C	Pull Your Luck brute force, greedy, math, number theory	1500	x12101
1800E2	Unforgivable Curse (hard version) brute force, constructive algorithms, dfs and similar, dsu, graphs, greedy, strings	1500	x12776
1800E1	Unforgivable Curse (easy version) brute force, constructive algorithms, dsu, graphs, greedy, strings	1400	x12798
1800D	Remove Two Letters data structures, greedy, hashing, strings	1200	x23507
1800C2	Powering the Hero (hard version) data structures, greedy	1100	x22425
1799B	Equalize by Divide brute force, constructive algorithms, greedy, math	1200	x11334
1797B	Li Hua and Pattern constructive algorithms, greedy	1100	x15939
1795C	Tea Tasting binary search, data structures, implementation	1500	x12406
1794C	Scoring Subsequences binary search, greedy, math, two pointers	1300	x13771
1793C	Dora and Search constructive algorithms, data structures, two pointers	1200	x20231
1793B	Fedya and Array constructive algorithms, math	1100	x15789
1792C	Min Max Sort binary search, brute force, greedy, math, two pointers	1500	x14086
1792B	Stand-up Comedian greedy, math	1200	x21316
1791G1	Teleporters (Easy Version) greedy, sortings	1100	x22525
1791F	Range Update Point Query binary search, brute force, data structures	1500	x12393
1791E	Negatives and Positives dp, greedy, sortings	1100	x28279
1790E	Vlad and a Pair of Numbers bitmasks, constructive algorithms	1400	x15094
1790D	Matryoshkas data structures, greedy, sortings	1200	x20117
1789C	Serval and Toxel's Arrays combinatorics, dp, implementation, math	1500	x8546
1788C	Matching Numbers constructive algorithms, greedy, math	1300	x17198
1788B	Sum of Two Numbers constructive algorithms, greedy, implementation, math, probabilities	1100	x20005
1787B	Number Factorization greedy, math, number theory	1100	x13234
1786B	Cake Assembly Line brute force, sortings	1300	x8962
1783B	Matrix of Differences constructive algorithms, math	1100	x17748
1780B	GCD Partition brute force, greedy, math, number theory	1100	x18037
1778B	The Forbidden Permutation greedy, math	1300	x13287
1776L	Controllers binary search, math	1500	x6004
1776H	Beppa and SwerChat two pointers	1300	x6379
1775B	Gardener and the Array bitmasks, constructive algorithms	1300	x13835
1774C	Ice and Fire constructive algorithms, dp, greedy	1300	x11998
1774B	Coloring constructive algorithms, greedy, math	1500	x12235
1773E	Easy Assembly greedy, sortings	1400	x4863
1772D	Absolute Sorting constructive algorithms, math	1400	x15869
1771B	Hossam and Friends binary search, constructive algorithms, dp, two pointers	1400	x14327
1769C2	Подкрутка II *special problem, dp	1300	x963
1769C1	Подкрутка I *special problem, brute force, dp, greedy	1200	x968
1769B2	Копирование файлов II *special problem, binary search, brute force, math	1400	x874
1768C	Elemental Decompress constructive algorithms, greedy, implementation, sortings	1300	x14171
1767D	Playoff combinatorics, constructive algorithms, dp, greedy, math	1500	x9873
1766C	Hamiltonian Wall dp, implementation	1300	x13614
1765N	Number Reduction greedy	1500	x4753
1765K	Torus Path greedy, math	1500	x5784
1764C	Doremy's City Construction graphs, greedy	1400	x9392