Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round 987 (Div. 2)
06:00:23
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1849B	Monsters greedy, math, sortings	1000	x26515
1849A	Morning Sandwich implementation, math	800	x28942
1848F	Vika and Wiki binary search, bitmasks, combinatorics, divide and conquer, dp, math	2400	x1641
1848E	Vika and Stone Skipping brute force, implementation, math, number theory	2600	x797
1848D	Vika and Bonuses binary search, brute force, math, ternary search	2200	x2649
1848C	Vika and Price Tags math, number theory	1800	x6366
1848B	Vika and the Bridge binary search, data structures, greedy, implementation, math, sortings	1200	x15431
1848A	Vika and Her Friends games, math	900	x16940
1847F	The Boss's Identity binary search, bitmasks, data structures, dfs and similar, greedy, math, sortings	2500	x907
1847E	Triangle Platinum? brute force, combinatorics, implementation, interactive, math, probabilities	2900	x333
1847D	Professor Higashikata data structures, dsu, greedy, implementation, strings	1900	x3827
1847C	Vampiric Powers, anyone? bitmasks, brute force, dp, greedy	1400	x12998
1847B	Hamon Odyssey bitmasks, greedy, two pointers	1000	x20148
1847A	The Man who became a God greedy, sortings	800	x22060
1846G	Rudolf and CodeVid-23 bitmasks, dp, graphs, greedy, shortest paths	1900	x4460
1846F	Rudolph and Mimic constructive algorithms, implementation, interactive	1800	x3160
1846E2	Rudolf and Snowflakes (hard version) binary search, brute force, implementation, math	1800	x7113
1846E1	Rudolf and Snowflakes (simple version) brute force, implementation, math	1300	x17219
1846D	Rudolph and Christmas Tree constructive algorithms, geometry, math	1200	x19604
1846C	Rudolf and the Another Competition constructive algorithms, data structures, dp, greedy, sortings	1200	x19291
1846B	Rudolph and Tic-Tac-Toe brute force, implementation, strings	800	x26985
1846A	Rudolph and Cut the Rope implementation, math	800	x32607
1845F	Swimmers in the Pool dp, fft, math, number theory	2800	x373
1845E	Boxes and Balls dp, implementation, math	2500	x1342
1845D	Rating System binary search, brute force, data structures, dp, dsu, greedy, math, two pointers	1800	x7919
1845C	Strong Password binary search, dp, greedy, strings	1400	x14437
1845B	Come Together geometry, implementation, math	900	x21741
1845A	Forbidden Integer constructive algorithms, implementation, math, number theory	800	x28237
1844H	Multiple of Three Cycles combinatorics, data structures, dp, dsu, math	3400	x139
1844G	Tree Weights bitmasks, constructive algorithms, data structures, dfs and similar, implementation, math, matrices, number theory, trees	3000	x736
1844F2	Min Cost Permutation (Hard Version) binary search, constructive algorithms, data structures, greedy, math, sortings	2800	x404
1844F1	Min Cost Permutation (Easy Version) brute force, constructive algorithms, greedy, math	2600	x786
1844E	Great Grids 2-sat, constructive algorithms, dfs and similar, dsu, graphs	2400	x1899
1844D	Row Major constructive algorithms, greedy, math, number theory, strings	1400	x12391
1844C	Particles dp, greedy, implementation, math	1300	x15815
1844B	Permutations & Primes constructive algorithms, math	1000	x18321
1844A	Subtraction Game constructive algorithms, games	800	x24646
1843F2	Omsk Metro (hard version) data structures, dfs and similar, divide and conquer, dp, math, trees	2300	x1638
1843F1	Omsk Metro (simple version) data structures, dfs and similar, dp, graphs, greedy, math, trees	1800	x5381
1843E	Tracking Segments binary search, brute force, data structures, two pointers	1600	x12585
1843D	Apple Tree combinatorics, dfs and similar, dp, math, trees	1200	x18289
1843C	Sum in Binary Tree bitmasks, combinatorics, math, trees	800	x33634
1843B	Long Long greedy, math, two pointers	800	x29202
1843A	Sasha and Array Coloring greedy, sortings, two pointers	800	x34437
1842I	Tenzing and Necklace divide and conquer, dp, greedy	3500	x121
1842H	Tenzing and Random Real Numbers bitmasks, dp, graphs, math, probabilities	3000	x704
1842G	Tenzing and Random Operations combinatorics, dp, math, probabilities	2800	x1074
1842F	Tenzing and Tree dfs and similar, greedy, shortest paths, sortings, trees	2500	x1353
1842E	Tenzing and Triangle data structures, dp, geometry, greedy, math	2300	x1637
1842D	Tenzing and His Animal Friends constructive algorithms, graphs, greedy	1900	x4125
1842C	Tenzing and Balls dp	1500	x13030
1842B	Tenzing and Books bitmasks, greedy, math	1100	x17378
1842A	Tenzing and Tsondu games, math	800	x19875
1841F	Monocarp and a Strategic Game geometry, sortings, two pointers	2700	x501
1841E	Fill the Matrix data structures, greedy, math	2200	x2041
1841D	Pairs of Segments data structures, greedy, sortings, two pointers	2000	x4471
1841C	Ranom Numbers brute force, dp, greedy, math, strings	1800	x7906
1841B	Keep it Beautiful implementation	1000	x21622
1841A	Game with Board constructive algorithms, games	800	x24780
1840G2	In Search of Truth (Hard Version) constructive algorithms, interactive, math, meet-in-the-middle, probabilities	2500	x993
1840G1	In Search of Truth (Easy Version) constructive algorithms, interactive, math, meet-in-the-middle, probabilities	2200	x2412
1840F	Railguns brute force, dfs and similar, dp, graphs	2200	x1842
1840E	Character Blocking data structures, hashing, implementation	1600	x8138
1840D	Wooden Toy Festival binary search, greedy, sortings	1400	x13902
1840C	Ski Resort combinatorics, math, two pointers	1000	x28422
1840B	Binary Cafe bitmasks, combinatorics, math	1100	x22591
1840A	Cipher Shifer implementation, strings, two pointers	800	x34312
1839E	Decreasing Game constructive algorithms, dfs and similar, dp, greedy, interactive	2400	x1236
1839D	Ball Sorting data structures, dp, sortings	2100	x2366
1839C	Insert Zero and Invert Prefix constructive algorithms	1300	x12085
1839B	Lamps greedy, sortings	1100	x15221
1839A	The Good Array greedy, implementation, math	800	x17539
1838F	Stuck Conveyor binary search, constructive algorithms, interactive	3000	x318
1838E	Count Supersequences combinatorics, dp, math	2500	x1497
1838D	Bracket Walk data structures, greedy, strings	2100	x3294
1838C	No Prime Differences constructive algorithms, math, number theory	1400	x14686
1838B	Minimize Permutation Subarrays constructive algorithms, math	1100	x16513
1838A	Blackboard List constructive algorithms, math	800	x21612
1837F	Editorial for Two binary search, data structures, greedy, implementation	2400	x2230
1837E	Playoff Fixing combinatorics, trees	2200	x2214
1837D	Bracket Coloring constructive algorithms, greedy	1400	x15101
1837C	Best Binary String constructive algorithms, greedy	1000	x22206
1837B	Comparison String greedy	900	x30544
1837A	Grasshopper on a Line constructive algorithms, math	800	x33321
1836B	Astrophysicists greedy, math	1100	x12707
1836A	Destroyer implementation, sortings	800	x20392
1835F	Good Graph bitmasks, dfs and similar, graph matchings, graphs, implementation	3500	x167
1835E	Old Mobile combinatorics, dp, probabilities	3500	x230
1835D	Doctor's Brown Hypothesis dfs and similar, graphs, math, number theory	2900	x510
1835C	Twin Clusters bitmasks, brute force, constructive algorithms, math, probabilities	2600	x1006
1835B	Lottery binary search, brute force, greedy, math, two pointers	2500	x950
1835A	k-th equality brute force, implementation, math	1700	x7904
1834F	Typewriter brute force, math	2500	x532
1834E	MEX of LCM binary search, data structures, implementation, math, number theory	2300	x2287
1834D	Survey in Class brute force, data structures, greedy, implementation, sortings	1900	x4736
1834C	Game with Reversing games, greedy, math, strings	1200	x13442
1834B	Maximum Strength greedy, math	1000	x15371
1834A	Unit Array greedy, math	800	x25189
1833G	Ksyusha and Chinchilla constructive algorithms, dfs and similar, dp, dsu, greedy, implementation, trees	1800	x5449
1833F	Ira and Flamenco combinatorics, constructive algorithms, data structures, implementation, math, sortings, two pointers	1700	x7507