Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round (Div. 2)
5 days
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

constructive algorithms

Add tag

Problems

#	Name
2138E2	Determinant Construction (Hard Version) brute force, constructive algorithms, math, matrices, number theory	3100	x227
2138E1	Determinant Construction (Easy Version) brute force, constructive algorithms, math, matrices, number theory	3100	x282
2138A	Cake Assignment bitmasks, constructive algorithms, greedy	1100	x18005
2137D	Replace with Occurrences constructive algorithms	1200	x20859
2137B	Fun Permutation constructive algorithms, math, number theory	900	x27969
2137A	Collatz Conjecture constructive algorithms, math	800	x36879
2136B	Like the Bitset constructive algorithms, greedy, two pointers	900	x22015
2135D2	From the Unknown (Hard Version) brute force, constructive algorithms, interactive, math	2500	x1506
2135D1	From the Unknown (Easy Version) constructive algorithms, interactive, math	2100	x4341
2135B	For the Champion constructive algorithms, interactive, math	1700	x9495
2134E	Power Boxes constructive algorithms, dp, implementation, interactive	2300	x2566
2134D	Sliding Tree constructive algorithms, dfs and similar, greedy, implementation, trees	2300	x3850
2134B	Add 0 or K constructive algorithms, math, number theory	1200	x22421
2134A	Painting With Two Colors constructive algorithms, implementation, math	800	x27744
2133E	I Yearned For The Mines constructive algorithms, dfs and similar, dp, greedy, trees	2500	x1824
2131H	Sea, You & copriMe brute force, constructive algorithms, graphs, greedy, math, number theory	2600	x953
2131B	Alternating Series constructive algorithms, greedy, math	800	x31820
2130B	Pathless constructive algorithms	1100	x22316
2129C3	Interactive RBS (Hard Version) binary search, bitmasks, constructive algorithms, dp, interactive	2300	x2338
2129C2	Interactive RBS (Medium Version) binary search, bitmasks, constructive algorithms, interactive	2000	x3925
2129C1	Interactive RBS (Easy Version) binary search, bitmasks, constructive algorithms, interactive	1900	x5325
2129A	Double Perspective constructive algorithms, dp, dsu, graphs, greedy, sortings	1300	x19421
2128E2	Submedians (Hard Version) binary search, constructive algorithms, data structures, math, two pointers	2600	x841
2128B	Deque Process constructive algorithms, greedy, sortings, two pointers	1100	x22420
2127G2	Inter Active (Hard Version) binary search, bitmasks, constructive algorithms, graphs, implementation, interactive, math, probabilities	3500	x172
2127G1	Inter Active (Easy Version) binary search, constructive algorithms, interactive, probabilities	3400	x195
2127E	Ancient Tree constructive algorithms, data structures, dfs and similar, dsu, greedy, trees	2100	x5479
2127A	Mix Mex Max constructive algorithms, greedy, math	800	x22267
2125A	Difficult Contest constructive algorithms, implementation, sortings, strings	800	x28837
2124I	Lexicographic Partition constructive algorithms, math, trees	3500	x778
2124E	Make it Zero constructive algorithms, greedy, math	2100	x5901
2124C	Subset Multiplication constructive algorithms, greedy, math, number theory	1300	x17610
2123F	Minimize Fixed Points constructive algorithms, number theory	1700	x10356
2123D	Binary String Battle constructive algorithms, games, greedy	1200	x22934
2122F	Colorful Polygon constructive algorithms, divide and conquer, geometry	3400	x217
2122C	Manhattan Pairs constructive algorithms, geometry, greedy, math, sortings	1700	x10759
2122A	Greedy Grid constructive algorithms, greedy	800	x21713
2121B	Above the Clouds constructive algorithms, greedy, strings	800	x33139
2120C	Divine Tree constructive algorithms, greedy, math, sortings, trees	1400	x13209
2119C	A Good Problem bitmasks, constructive algorithms, math	1300	x17077
2118E	Grid Coloring constructive algorithms, geometry, greedy, math	2400	x1468
2118B	Make It Permutation constructive algorithms	1200	x20695
2118A	Equal Subsequences constructive algorithms, greedy	800	x29637
2117B	Shrink constructive algorithms	800	x32913
2115B	Gellyfish and Camellia Japonica brute force, constructive algorithms, dfs and similar, dp, graphs, greedy, trees	2100	x6007
2115A	Gellyfish and Flaming Peony constructive algorithms, dp, math, number theory	1500	x17814
2114G	Build an Array brute force, constructive algorithms, dp, greedy, math, number theory	2200	x2124
2113F	Two Arrays constructive algorithms, dfs and similar, graphs, math	2500	x1018
2113D	Cheater binary search, constructive algorithms, greedy, implementation	2200	x3008
2113C	Smilo and Minecraft brute force, constructive algorithms, greedy	1700	x8406
2113B	Good Start constructive algorithms, math	1200	x15247
2112D	Reachability and Tree constructive algorithms, dfs and similar, graphs, trees	1700	x9971
2111F	Puzzle brute force, constructive algorithms, greedy, math	2400	x1488
2111D	Creating a Schedule constructive algorithms, data structures, greedy, implementation, sortings	1400	x12555
2110C	Racing constructive algorithms, greedy	1400	x16509
2109C3	Hacking Numbers (Hard Version) constructive algorithms, interactive, math, number theory	2600	x3488
2109C2	Hacking Numbers (Medium Version) constructive algorithms, interactive, math, number theory	1700	x9097
2109C1	Hacking Numbers (Easy Version) bitmasks, constructive algorithms, interactive, math, number theory	1500	x12017
2108E	Spruce Dispute constructive algorithms, dfs and similar, graphs, greedy, implementation, shortest paths, trees	2600	x949
2108B	SUMdamental Decomposition bitmasks, constructive algorithms, greedy, implementation, math	1300	x15084
2107E	Ain and Apple Tree binary search, constructive algorithms, greedy, math, trees	2600	x968
2107C	Maximum Subarray Sum binary search, constructive algorithms, dp, implementation, math	1500	x12719
2106G1	Baudelaire (easy version) binary search, constructive algorithms, divide and conquer, greedy, interactive, trees	2200	x1714
2106B	St. Chroma constructive algorithms, greedy, math	900	x29266
2104C	Card Game brute force, constructive algorithms, games, greedy, math	1100	x17986
2103E	Keep the Sum constructive algorithms, implementation, two pointers	2600	x644
2103D	Local Construction constructive algorithms, dfs and similar, implementation, two pointers	2000	x4129
2102A	Dinner Time constructive algorithms, math	900	x22270
2101A	Mex in the Grid constructive algorithms, implementation	1300	x15871
2096G	Wonderful Guessing Game bitmasks, constructive algorithms, interactive	3200	x470
2096D	Wonderful Lightbulbs combinatorics, constructive algorithms, math	2000	x5781
2096A	Wonderful Sticks constructive algorithms, greedy	800	x21019
2094F	Trulimero Trulicina constructive algorithms	1600	x12046
2094B	Bobritto Bandito brute force, constructive algorithms	800	x34275
2092F	Andryusha and CCB brute force, constructive algorithms, greedy, math, number theory, strings	2900	x452
2092E	She knows... combinatorics, constructive algorithms, graphs, math	2100	x3969
2092D	Mishkin Energizer brute force, constructive algorithms, greedy, implementation, strings	1800	x7089
2092C	Asuna and the Mosquitoes constructive algorithms, greedy, math	1200	x23451
2092B	Lady Bug brute force, constructive algorithms, implementation, math	1000	x25706
2091G	Gleb and Boating brute force, constructive algorithms, data structures, dp, graphs, greedy, math, number theory, shortest paths	2300	x1675
2091C	Combination Lock constructive algorithms, greedy	1000	x29708
2089D	Conditional Operators constructive algorithms	3200	x200
2089A	Simple Permutation constructive algorithms, number theory	1700	x7550
2086F	Online Palindrome brute force, constructive algorithms, interactive	3000	x154
2086E	Zebra-like Numbers bitmasks, brute force, constructive algorithms, dfs and similar, dp, greedy, math	2400	x1737
2085E	Serval and Modulo constructive algorithms, math, number theory	2200	x3307
2085C	Serval and The Formula bitmasks, constructive algorithms, dp, greedy	1600	x14281
2085B	Serval and Final MEX constructive algorithms, implementation	1200	x17669
2085A	Serval and String Theory constructive algorithms, implementation	900	x24162
2084F	Skyscape constructive algorithms, data structures, greedy	2900	x529
2084D	Arcology On Permafrost binary search, brute force, constructive algorithms, greedy, math	1600	x9277
2084C	You Soared Afar With Grace constructive algorithms, data structures, greedy, implementation	1400	x12218
2084A	Max and Mod constructive algorithms, math	800	x17679
2082A	Binary Matrix constructive algorithms, greedy	800	x11395
2081F	Hot Matrix constructive algorithms, math	3300	x150
2081D	MST in Modulo Graph constructive algorithms, dsu, graphs, greedy, math, number theory, sortings, trees	2600	x1457
2081C	Quaternary Matrix bitmasks, constructive algorithms, greedy, implementation, matrices	2700	x391
2080A	Strong Connectivity Strikes Back *special problem, constructive algorithms, graphs	3200	x55
2078B	Vicious Labyrinth constructive algorithms, graphs, greedy, implementation, math	1100	x18806
2077F	AND x OR bitmasks, constructive algorithms, dp	3300	x279

The only programming contests Web 2.0 platform

Server time: Oct/19/2026 19:57:53 (g2).

Desktop version, switch to mobile version.

Supported by