Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Global Round 26
19:44:31
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

constructive algorithms

Add tag

Problems

#	Name
1844E	Great Grids 2-sat, constructive algorithms, dfs and similar, dsu, graphs	2400	x1696
1844D	Row Major constructive algorithms, greedy, math, number theory, strings	1400	x11753
1844B	Permutations & Primes constructive algorithms, math	1000	x17604
1844A	Subtraction Game constructive algorithms, games	800	x24031
1842D	Tenzing and His Animal Friends constructive algorithms, graphs, greedy	1900	x3948
1841A	Game with Board constructive algorithms, games	800	x24349
1840G2	In Search of Truth (Hard Version) constructive algorithms, interactive, math, meet-in-the-middle, probabilities	2500	x906
1840G1	In Search of Truth (Easy Version) constructive algorithms, interactive, math, meet-in-the-middle, probabilities	2200	x2253
1839E	Decreasing Game constructive algorithms, dfs and similar, dp, greedy, interactive	2400	x1168
1839C	Insert Zero and Invert Prefix constructive algorithms	1300	x11479
1838F	Stuck Conveyor binary search, constructive algorithms, interactive	3000	x304
1838C	No Prime Differences constructive algorithms, math, number theory	1400	x13641
1838B	Minimize Permutation Subarrays constructive algorithms, math	1100	x15928
1838A	Blackboard List constructive algorithms, math	800	x21151
1837D	Bracket Coloring constructive algorithms, greedy	1400	x13692
1837C	Best Binary String constructive algorithms, greedy	1000	x21281
1837A	Grasshopper on a Line constructive algorithms, math	800	x29799
1835C	Twin Clusters bitmasks, brute force, constructive algorithms, math, probabilities	2600	x946
1833G	Ksyusha and Chinchilla constructive algorithms, dfs and similar, dp, dsu, greedy, implementation, trees	1800	x5004
1833F	Ira and Flamenco combinatorics, constructive algorithms, data structures, implementation, math, sortings, two pointers	1700	x6857
1833D	Flipper brute force, constructive algorithms, greedy	1400	x12838
1832D2	Red-Blue Operations (Hard Version) binary search, constructive algorithms, greedy, implementation, math	2400	x1813
1831B	Array merging constructive algorithms, greedy	1000	x18942
1831A	Twin Permutations constructive algorithms	800	x24714
1828A	Divisible Array constructive algorithms, math	800	x23127
1827F	Copium Permutation constructive algorithms, data structures, greedy	3500	x111
1827E	Bus Routes binary search, constructive algorithms, dfs and similar, greedy, trees	3400	x366
1823D	Unique Palindromes constructive algorithms, math, strings	1900	x3683
1823A	A-characteristic combinatorics, constructive algorithms, math	800	x15871
1822D	Super-Permutation constructive algorithms, math	1200	x16055
1819C	The Fox and the Complete Tree Traversal constructive algorithms, dp, implementation, math, trees	2400	x1407
1818B	Indivisible constructive algorithms	900	x14198
1817D	Toy Machine constructive algorithms, games, implementation	2700	x677
1817B	Fish Graph brute force, constructive algorithms, dfs and similar, graphs	1900	x3908
1816B	Grid Reconstruction constructive algorithms, greedy	1000	x14850
1816A	Ian Visits Mary constructive algorithms, geometry, number theory	800	x16994
1815F	OH NO1 (-2-3-4) constructive algorithms, graphs, math	3500	x215
1815C	Between constructive algorithms, dfs and similar, graphs, greedy	2200	x1893
1815B	Sum Graph brute force, constructive algorithms, graphs, implementation, interactive, shortest paths, trees	2000	x2889
1814C	Search in Parallel constructive algorithms, greedy, sortings	1500	x10312
1812J	Unmysterious Language *special problem, constructive algorithms, strings		x5813
1812E	Not a Geometry Problem special problem, special problem, constructive algorithms, geometry, math		x3956
1812D	Trivial Conjecture *special problem, constructive algorithms, math, number theory		x4349
1811D	Umka and a Long Flight constructive algorithms, implementation, math	1600	x7128
1811C	Restore the Array constructive algorithms, greedy	1100	x19065
1810B	Candies constructive algorithms, math, number theory	800	x17219
1809D	Binary String Sorting constructive algorithms, greedy	1800	x5999
1809C	Sum on Subarrays constructive algorithms, greedy, math	1500	x12058
1806C	Sequence Master brute force, constructive algorithms, math	1600	x7293
1806B	Mex Master constructive algorithms, greedy	900	x17175
1801A	The Very Beautiful Blanket bitmasks, constructive algorithms	1600	x8210
1800E2	Unforgivable Curse (hard version) brute force, constructive algorithms, dfs and similar, dsu, graphs, greedy, strings	1500	x12215
1800E1	Unforgivable Curse (easy version) brute force, constructive algorithms, dsu, graphs, greedy, strings	1400	x12268
1799E	City Union constructive algorithms, dfs and similar, dsu, geometry, greedy, implementation, math	2300	x1164
1799B	Equalize by Divide brute force, constructive algorithms, greedy, math	1200	x10912
1798D	Shocking Arrangement constructive algorithms, greedy, math	1600	x9230
1797C	Li Hua and Chess constructive algorithms, greedy, interactive	1600	x7311
1797B	Li Hua and Pattern constructive algorithms, greedy	1100	x14812
1797A	Li Hua and Maze constructive algorithms, flows, graphs, greedy, implementation	800	x17043
1795F	Blocking Chips binary search, constructive algorithms, dfs and similar, greedy, trees	2400	x1072
1794B	Not Dividing constructive algorithms, greedy, math	900	x20063
1793C	Dora and Search constructive algorithms, data structures, two pointers	1200	x18518
1793B	Fedya and Array constructive algorithms, math	1100	x15349
1790G	Tokens on Graph constructive algorithms, dfs and similar, graphs, shortest paths	2300	x1075
1790E	Vlad and a Pair of Numbers bitmasks, constructive algorithms	1400	x14384
1789D	Serval and Shift-Shift-Shift bitmasks, brute force, constructive algorithms, implementation	2200	x1591
1788F	XOR, Tree, and Queries bitmasks, constructive algorithms, dfs and similar, dsu, graphs, greedy, implementation, trees	2500	x804
1788C	Matching Numbers constructive algorithms, greedy, math	1300	x16604
1788B	Sum of Two Numbers constructive algorithms, greedy, implementation, math, probabilities	1100	x19396
1787F	Inverse Transformation constructive algorithms, implementation, math	2500	x635
1787E	The Harmonization of XOR bitmasks, constructive algorithms, greedy, math	2100	x2206
1787A	Exponential Equation constructive algorithms, math	800	x18829
1784B	Letter Exchange constructive algorithms	1900	x3239
1783B	Matrix of Differences constructive algorithms, math	1100	x17298
1783A	Make it Beautiful constructive algorithms, math, sortings	800	x27897
1781G	Diverse Coloring constructive algorithms, trees	3200	x217
1781C	Equal Frequencies brute force, constructive algorithms, greedy, implementation, sortings, strings	1600	x7165
1780D	Bit Guessing Game binary search, bitmasks, constructive algorithms, interactive	1800	x4706
1780A	Hayato and School constructive algorithms, greedy	800	x21145
1779G	The Game of the Century constructive algorithms, graphs, shortest paths	3000	x305
1779F	Xorcerer's Stones bitmasks, constructive algorithms, dp, trees	2500	x1225
1779E	Anya's Simultaneous Exhibition constructive algorithms, graphs, greedy, interactive, sortings	2400	x1707
1779D	Boris and His Amazing Haircut constructive algorithms, data structures, dp, dsu, greedy, sortings	1700	x7581
1779B	MKnez's ConstructiveForces Task constructive algorithms, math	900	x23115
1779A	Hall of Fame constructive algorithms, greedy, strings	800	x22942
1776G	Another Wine Tasting Event combinatorics, constructive algorithms, math, strings	2100	x1968
1776F	Train Splitting constructive algorithms, graphs, greedy	1700	x3279
1776D	Teamwork constructive algorithms, greedy, math	2800	x343
1775F	Laboratory on Pluto constructive algorithms, dp, greedy, math	2500	x748
1775B	Gardener and the Array bitmasks, constructive algorithms	1300	x12828
1775A2	Gardener and the Capybaras (hard version) constructive algorithms, greedy	900	x18366
1775A1	Gardener and the Capybaras (easy version) brute force, constructive algorithms, implementation	800	x19369
1774H	Maximum Permutation constructive algorithms	3500	x130
1774G	Segment Covering brute force, combinatorics, constructive algorithms, data structures, dp, trees	3200	x395
1774D	Same Count One brute force, constructive algorithms, greedy, implementation, two pointers	1600	x7494
1774C	Ice and Fire constructive algorithms, dp, greedy	1300	x11659
1774B	Coloring constructive algorithms, greedy, math	1500	x11720
1774A	Add Plus Minus Sign constructive algorithms, math	800	x22074
1773K	King's Puzzle constructive algorithms	1900	x1386
1773J	Jumbled Trees constructive algorithms, math	2900	x104