Problemset - Codeforces

→ Pay attention

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

*has extra registration

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1525C	Robot Collisions data structures, greedy, implementation, sortings	2000	x4505
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	x2191
1523C	Compression and Expansion brute force, data structures, greedy, implementation, trees	1600	x8811
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	x1978
1521C	Nastia and a Hidden Permutation constructive algorithms, interactive	2000	x4386
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	x3047
1520F1	Guess the K-th Zero (Easy version) binary search, interactive	1600	x11941
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	x15442
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	x983
1517D	Explorer Space dp, graphs, shortest paths	1800	x7787
1516E	Baby Ehab Plays with Permutations combinatorics, dp, math	2500	x885
1516D	Cut binary search, data structures, dp, graphs, number theory, two pointers	2100	x4442
1516C	Baby Ehab Partitions Again bitmasks, constructive algorithms, dp, math	1700	x12036
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	x1839
1515E	Phoenix and Computers combinatorics, dp, math	2200	x3659
1514E	Baby Ehab's Hyper Apartment binary search, graphs, interactive, sortings, two pointers	2700	x630
1514D	Cut and Stick binary search, data structures, greedy, implementation, sortings	2000	x4366
1514C	Product 1 Modulo N greedy, number theory	1600	x15388
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	x5523
1513C	Add One dp, matrices	1600	x14187
1512G	Short Task brute force, dp, math, number theory	1700	x8316
1512F	Education brute force, dp, greedy, implementation	1900	x6284
1512E	Permutation by Sum brute force, greedy, math	1600	x10573
1511G	Chips on a Board bitmasks, brute force, data structures, dp, games, two pointers	2700	x805
1511F	Chainword brute force, data structures, dp, matrices, string suffix structures, strings	2700	x449
1511E	Colorings and Dominoes combinatorics, dp, greedy, math	2100	x2614
1511D	Min Cost String brute force, constructive algorithms, graphs, greedy, strings	1600	x11597
1510J	Japanese Game constructive algorithms, math	2700	x532
1510I	Is It Rated? greedy, interactive, math, probabilities	2700	x496
1510H	Hard Optimization dp	3200	x98
1510G	Guide	2100	x1311
1510F	Fiber Shape	2800	x58
1510E	Equilibrium Point /\textbackslash/\textbackslash	2700	x260
1510D	Digits dp, math, number theory	2100	x1939
1510C	Cactus Not Enough dfs and similar, graph matchings, graphs	2900	x220
1510B	Button Lock flows, graph matchings, graphs	2600	x764
1510A	ASCII Automata Art	3100	x156
1509C	The Sports Festival dp, greedy	1800	x12764
1508F	Optimal Encoding brute force, data structures	3500	x128
1508E	Tree Calendar brute force, constructive algorithms, data structures, dfs and similar, sortings, trees	3100	x350
1508D	Swap Pass constructive algorithms, geometry, sortings	3000	x579
1508C	Complete the MST bitmasks, brute force, data structures, dfs and similar, dsu, graphs, greedy, trees	2500	x1518
1508B	Almost Sorted binary search, combinatorics, constructive algorithms, implementation	1800	x4040
1508A	Binary Literature constructive algorithms, greedy, implementation, strings, two pointers	1900	x6289
1506G	Maximize the Remaining String brute force, data structures, dp, greedy, strings	2000	x4389
1506F	Triangular Paths constructive algorithms, graphs, math, shortest paths, sortings	2000	x3303
1505I	Mysterious language again, seriously? *special problem	2200	x560
1505H	L BREAK into program *special problem	2500	x515
1505G	Encoded message *special problem, implementation	2600	x307
1505F	Math *special problem, math	2200	x1515
1505E	Cakewalk *special problem, greedy, implementation, shortest paths	1800	x1809
1505D	Xenolith? Hippodrome? *special problem, number theory	1800	x802
1505B	DMCA *special problem, implementation, number theory	1600	x6200
1503F	Balance the Cards constructive algorithms, data structures, divide and conquer, geometry, graphs, implementation	3500	x184
1503E	2-Coloring combinatorics, dp, math	3100	x715
1503D	Flip the Cards 2-sat, constructive algorithms, data structures, greedy, sortings, two pointers	2600	x1132
1503C	Travelling Salesman Problem binary search, data structures, dp, greedy, shortest paths, sortings, two pointers	2200	x3471
1503B	3-Coloring constructive algorithms, games, interactive	1700	x7088
1503A	Balance the Bits constructive algorithms, greedy	1600	x13504
1500F	Cupboards Jumps dp	3500	x355
1500E	Subset Trick binary search, data structures	3300	x220
1500D	Tiles for Bathroom data structures, sortings, two pointers	2900	x463
1500C	Matrix Sorting bitmasks, brute force, constructive algorithms, greedy, two pointers	2600	x823
1500B	Two chandeliers binary search, brute force, chinese remainder theorem, math, number theory	2200	x2096
1500A	Going Home brute force, hashing, implementation, math	1800	x8918
1499G	Graph Coloring data structures, graphs, interactive	3100	x194
1499F	Diameter Cuts combinatorics, dfs and similar, dp, trees	2400	x1375
1499E	Chaotic Merge combinatorics, dp, math, strings	2400	x1524
1499D	The Number of Pairs dp, math, number theory	2100	x5940
1498F	Christmas Game bitmasks, data structures, dfs and similar, dp, games, math, trees	2500	x929
1498E	Two Houses brute force, graphs, greedy, interactive, sortings	2200	x1949
1498D	Bananas in a Microwave dfs and similar, dp, graphs, implementation	2200	x2347
1498C	Planar Reflections brute force, data structures, dp	1600	x9825
1497E2	Square-Free Division (hard version) data structures, dp, greedy, math, number theory, two pointers	2500	x1750
1497E1	Square-Free Division (easy version) data structures, dp, greedy, math, number theory, two pointers	1700	x8423
1497D	Genius bitmasks, dp, graphs, number theory	2500	x1556
1497C2	k-LCM (hard version) constructive algorithms, math	1600	x17487
1495F	Squares constructive algorithms, data structures, dp, graphs, trees	3300	x346
1495E	Qingshan and Daniel brute force, data structures, greedy, implementation	3200	x417
1495D	BFS Trees combinatorics, dfs and similar, graphs, math, shortest paths, trees	2600	x1344
1495C	Garden of the Sun constructive algorithms, graphs	2300	x2649
1495B	Let's Go Hiking games, greedy	1900	x6056
1494F	Delete The Edges brute force, constructive algorithms, dfs and similar, graphs, implementation	2900	x386
1494E	A-Z Graph constructive algorithms, data structures, graphs, hashing	2400	x1842