Problemset - Codeforces

→ Pay attention

Before contest
Rayan Programming Contest 2024 - Selection (Codeforces Round 989, Div. 1 + Div. 2)
4 days
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1531E3	Сортировка слиянием *special problem, binary search		x269
1531E2	Сортировка слиянием special problem, special problem, brute force		x338
1531E1	Сортировка слиянием *special problem		x358
1531D	Редактируем Зингер \| color special problem, special problem		x353
1531C	Симметричный амфитеатр *special problem, constructive algorithms, dp		x650
1531B2	Мониторинг *special problem		x768
1531B1	Мониторинг special problem, special problem		x1113
1531A	Зингер \| color *special problem, implementation		x1451
1530H	Turing's Award data structures, dp	3400	x162
1530G	What a Reversal constructive algorithms	3300	x144
1530F	Bingo bitmasks, combinatorics, dp, math, probabilities	2600	x832
1530E	Minimax constructive algorithms, greedy, strings	2100	x2991
1530D	Secret Santa constructive algorithms, flows, graphs, greedy, math	1600	x9290
1530C	Pursuit binary search, brute force, greedy, sortings	1200	x14717
1530B	Putting Plates constructive algorithms, implementation	800	x15813
1530A	Binary Decimal greedy, math	800	x21137
1529B	Sifid and Strange Subsequences greedy, math, sortings	1100	x20626
1529A	Eshag Loves Big Arrays constructive algorithms, greedy, math	800	x29861
1528F	AmShZ Farm combinatorics, fft, math	3300	x289
1528E	Mashtali and Hagh Trees combinatorics, dp, trees	2900	x534
1528D	It's a bird! No, it's a plane! No, it's AaParsa! constructive algorithms, graphs, shortest paths	2500	x1448
1528C	Trees of Tranquillity data structures, dfs and similar, greedy, trees	2300	x2664
1528B	Kavi on Pairing Duty combinatorics, dp, math	1700	x8771
1528A	Parsa's Humongous Tree dfs and similar, divide and conquer, dp, greedy, trees	1600	x15006
1527E	Partition Game binary search, data structures, divide and conquer, dp	2500	x2369
1527D	MEX Tree combinatorics, dfs and similar, implementation, math, trees	2400	x1924
1527C	Sequence Pair Weight hashing, implementation, math	1600	x13658
1527B2	Palindrome Game (hard version) constructive algorithms, games	1900	x7992
1527B1	Palindrome Game (easy version) constructive algorithms, games	1200	x26491
1527A	And Then There Were K bitmasks	800	x36061
1526F	Median Queries constructive algorithms, interactive, probabilities	3000	x293
1526E	Oolimry and Suffix Array combinatorics, constructive algorithms, math	2400	x1067
1526D	Kill Anton brute force, constructive algorithms, data structures, math, strings	2200	x2484
1526C2	Potions (Hard Version) data structures, greedy	1600	x23139
1526C1	Potions (Easy Version) brute force, data structures, dp, greedy	1500	x22852
1526B	I Hate 1111 dp, math, number theory	1400	x31087
1526A	Mean Inequality constructive algorithms, sortings	800	x24260
1525F	Goblins And Gnomes brute force, dp, flows, graph matchings	2800	x333
1525E	Assimilation IV combinatorics, dp, math, probabilities, two pointers	2100	x2084
1525D	Armchairs dp, flows, graph matchings, greedy	1800	x9871
1525C	Robot Collisions data structures, greedy, implementation, sortings	2000	x4505
1525B	Permutation Sort constructive algorithms, greedy	900	x25020
1525A	Potion-making math, number theory	800	x25686
1523H	Hopping Around the Array data structures, dp	3500	x251
1523G	Try Booking data structures, divide and conquer	3200	x466
1523F	Favorite Game bitmasks, dp	3300	x437
1523E	Crypto Lights combinatorics, dp, math, probabilities	2600	x1700
1523D	Love-Hate bitmasks, brute force, dp, probabilities	2400	x2190
1523C	Compression and Expansion brute force, data structures, greedy, implementation, trees	1600	x8811
1523B	Lord of the Values constructive algorithms	1100	x12120
1523A	Game of Life implementation	800	x13522
1521E	Nastia and a Beautiful Matrix binary search, constructive algorithms, dp, greedy	2700	x681
1521D	Nastia Plays with a Tree constructive algorithms, data structures, dfs and similar, dp, dsu, greedy, implementation, trees	2500	x1977
1521C	Nastia and a Hidden Permutation constructive algorithms, interactive	2000	x4384
1521B	Nastia and a Good Array constructive algorithms, math, number theory	1300	x21490
1521A	Nastia and Nearly Good Numbers constructive algorithms, math, number theory	1000	x37593
1520G	To Go Or Not To Go? brute force, dfs and similar, graphs, greedy, implementation, shortest paths	2200	x3757
1520F2	Guess the K-th Zero (Hard version) binary search, constructive algorithms, data structures, interactive	2200	x3046
1520F1	Guess the K-th Zero (Easy version) binary search, interactive	1600	x11940
1520E	Arranging The Sheep greedy, math	1400	x21766
1520D	Same Differences data structures, hashing, math	1200	x48025
1520C	Not Adjacent Matrix constructive algorithms	1000	x32003
1520B	Ordinary Numbers brute force, math, number theory	800	x44885
1520A	Do Not Be Distracted! brute force, implementation	800	x52294
1519F	Chests and Keys bitmasks, brute force, dfs and similar, dp, flows	3200	x435
1519E	Off by One constructive algorithms, dfs and similar, geometry, graphs, sortings, trees	2700	x829
1519D	Maximum Sum of Products brute force, dp, implementation, math, two pointers	1600	x15436
1519C	Berland Regional brute force, data structures, greedy, number theory, sortings	1400	x17161
1519B	The Cake Is a Lie dp, math	800	x31084
1519A	Red and Blue Beans math	800	x29047
1517H	Fly Around the World dp, geometry	3500	x73
1517G	Starry Night Camping constructive algorithms, flows, graphs	3300	x500
1517F	Reunion combinatorics, dp, trees	3200	x467
1517E	Group Photo binary search, data structures, implementation, two pointers	2500	x982
1517D	Explorer Space dp, graphs, shortest paths	1800	x7784
1517C	Fillomino 2 constructive algorithms, dfs and similar, greedy, implementation	1400	x13425
1517B	Morning Jogging constructive algorithms, greedy, sortings	1200	x13286
1517A	Sum of 2050 greedy, math	800	x25630
1516E	Baby Ehab Plays with Permutations combinatorics, dp, math	2500	x885
1516D	Cut binary search, data structures, dp, graphs, number theory, two pointers	2100	x4440
1516C	Baby Ehab Partitions Again bitmasks, constructive algorithms, dp, math	1700	x12036
1516B	AGAGA XOOORRR bitmasks, brute force, dp, greedy	1500	x19703
1516A	Tit for Tat greedy	800	x23513
1515I	Phoenix and Diamonds binary search, data structures, sortings	3400	x285
1515H	Phoenix and Bits bitmasks, brute force, data structures, sortings	3500	x240
1515G	Phoenix and Odometers dfs and similar, graphs, math, number theory	2700	x1040
1515F	Phoenix and Earthquake constructive algorithms, dfs and similar, dsu, graphs, greedy, trees	2600	x1837
1515E	Phoenix and Computers combinatorics, dp, math	2200	x3657
1515D	Phoenix and Socks greedy, sortings, two pointers	1500	x11458
1515C	Phoenix and Towers constructive algorithms, data structures, greedy	1400	x17270
1515B	Phoenix and Puzzle brute force, geometry, math, number theory	1000	x25128
1515A	Phoenix and Gold constructive algorithms, greedy, math	800	x20264
1514E	Baby Ehab's Hyper Apartment binary search, graphs, interactive, sortings, two pointers	2700	x629
1514D	Cut and Stick binary search, data structures, greedy, implementation, sortings	2000	x4366
1514C	Product 1 Modulo N greedy, number theory	1600	x15382
1514B	AND 0, Sum Big bitmasks, combinatorics, math	1200	x25490
1514A	Perfectly Imperfect Array math, number theory	800	x24294
1513F	Swapping Problem brute force, constructive algorithms, data structures, sortings	2500	x1290
1513E	Cost Equilibrium combinatorics, constructive algorithms, math, sortings	2300	x1526
1513D	GCD and MST constructive algorithms, dsu, graphs, greedy, number theory, sortings	2000	x5519