Problemset - Codeforces

Please read the new rule regarding the restriction on the use of AI tools. ×

→ Pay attention

Before contest
Codeforces Round 974 (Div. 3)
10:07:10
Register now »

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1519E	Off by One constructive algorithms, dfs and similar, geometry, graphs, sortings, trees	2700	x819
1519D	Maximum Sum of Products brute force, dp, implementation, math, two pointers	1600	x15174
1517H	Fly Around the World dp, geometry	3500	x70
1517G	Starry Night Camping constructive algorithms, flows, graphs	3300	x492
1517F	Reunion combinatorics, dp, trees	3200	x459
1517E	Group Photo binary search, data structures, implementation, two pointers	2500	x965
1517D	Explorer Space dp, graphs, shortest paths	1800	x7691
1516E	Baby Ehab Plays with Permutations combinatorics, dp, math	2500	x863
1516D	Cut binary search, data structures, dp, graphs, number theory, two pointers	2100	x4333
1516C	Baby Ehab Partitions Again bitmasks, constructive algorithms, dp, math	1700	x11909
1515I	Phoenix and Diamonds binary search, data structures, sortings	3400	x277
1515H	Phoenix and Bits bitmasks, brute force, data structures, sortings	3500	x232
1515G	Phoenix and Odometers dfs and similar, graphs, math, number theory	2700	x1006
1515F	Phoenix and Earthquake constructive algorithms, dfs and similar, dsu, graphs, greedy, trees	2600	x1769
1515E	Phoenix and Computers combinatorics, dp, math	2200	x3541
1514E	Baby Ehab's Hyper Apartment binary search, graphs, interactive, sortings, two pointers	2700	x611
1514D	Cut and Stick binary search, data structures, greedy, implementation, sortings	2000	x4290
1514C	Product 1 Modulo N greedy, number theory	1600	x15030
1513F	Swapping Problem brute force, constructive algorithms, data structures, sortings	2500	x1261
1513E	Cost Equilibrium combinatorics, constructive algorithms, math, sortings	2300	x1497
1513D	GCD and MST constructive algorithms, dsu, graphs, greedy, number theory, sortings	2000	x5364
1513C	Add One dp, matrices	1600	x13942
1512G	Short Task brute force, dp, math, number theory	1700	x8106
1512F	Education brute force, dp, greedy, implementation	1900	x6195
1512E	Permutation by Sum brute force, greedy, math	1600	x10428
1511G	Chips on a Board bitmasks, brute force, data structures, dp, games, two pointers	2700	x771
1511F	Chainword brute force, data structures, dp, matrices, string suffix structures, strings	2700	x431
1511E	Colorings and Dominoes combinatorics, dp, greedy, math	2100	x2575
1511D	Min Cost String brute force, constructive algorithms, graphs, greedy, strings	1600	x11456
1510J	Japanese Game constructive algorithms, math	2700	x521
1510I	Is It Rated? greedy, interactive, math, probabilities	2700	x479
1510H	Hard Optimization dp	3200	x98
1510G	Guide	2100	x1277
1510F	Fiber Shape	2800	x58
1510E	Equilibrium Point /\textbackslash/\textbackslash	2700	x254
1510D	Digits dp, math, number theory	2100	x1892
1510C	Cactus Not Enough dfs and similar, graph matchings, graphs	2900	x212
1510B	Button Lock flows, graph matchings, graphs	2600	x741
1510A	ASCII Automata Art	3100	x154
1509C	The Sports Festival dp, greedy	1800	x12498
1508F	Optimal Encoding brute force, data structures	3500	x125
1508E	Tree Calendar brute force, constructive algorithms, data structures, dfs and similar, sortings, trees	3100	x346
1508D	Swap Pass constructive algorithms, geometry, sortings	3000	x566
1508C	Complete the MST bitmasks, brute force, data structures, dfs and similar, dsu, graphs, greedy, trees	2500	x1485
1508B	Almost Sorted binary search, combinatorics, constructive algorithms, implementation	1800	x3979
1508A	Binary Literature constructive algorithms, greedy, implementation, strings, two pointers	1900	x6215
1506G	Maximize the Remaining String brute force, data structures, dp, greedy, strings	2000	x4294
1506F	Triangular Paths constructive algorithms, graphs, math, shortest paths, sortings	2000	x3260
1505I	Mysterious language again, seriously? *special problem	2200	x554
1505H	L BREAK into program *special problem	2500	x502
1505G	Encoded message *special problem, implementation	2600	x302
1505F	Math *special problem, math	2200	x1499
1505E	Cakewalk *special problem, greedy, implementation, shortest paths	1800	x1796
1505D	Xenolith? Hippodrome? *special problem, number theory	1800	x790
1505B	DMCA *special problem, implementation, number theory	1600	x6146
1503F	Balance the Cards constructive algorithms, data structures, divide and conquer, geometry, graphs, implementation	3500	x182
1503E	2-Coloring combinatorics, dp, math	3100	x692
1503D	Flip the Cards 2-sat, constructive algorithms, data structures, greedy, sortings, two pointers	2600	x1076
1503C	Travelling Salesman Problem binary search, data structures, dp, greedy, shortest paths, sortings, two pointers	2200	x3417
1503B	3-Coloring constructive algorithms, games, interactive	1700	x7025
1503A	Balance the Bits constructive algorithms, greedy	1600	x13374
1500F	Cupboards Jumps dp	3500	x349
1500E	Subset Trick binary search, data structures	3300	x216
1500D	Tiles for Bathroom data structures, sortings, two pointers	2900	x455
1500C	Matrix Sorting bitmasks, brute force, constructive algorithms, greedy, two pointers	2600	x802
1500B	Two chandeliers binary search, brute force, chinese remainder theorem, math, number theory	2200	x2038
1500A	Going Home brute force, hashing, implementation, math	1800	x8802
1499G	Graph Coloring data structures, graphs, interactive	3100	x190
1499F	Diameter Cuts combinatorics, dfs and similar, dp, trees	2400	x1320
1499E	Chaotic Merge combinatorics, dp, math, strings	2400	x1503
1499D	The Number of Pairs dp, math, number theory	2100	x5801
1498F	Christmas Game bitmasks, data structures, dfs and similar, dp, games, math, trees	2500	x911
1498E	Two Houses brute force, graphs, greedy, interactive, sortings	2200	x1918
1498D	Bananas in a Microwave dfs and similar, dp, graphs, implementation	2200	x2319
1498C	Planar Reflections brute force, data structures, dp	1600	x9659
1497E2	Square-Free Division (hard version) data structures, dp, greedy, math, number theory, two pointers	2500	x1668
1497E1	Square-Free Division (easy version) data structures, dp, greedy, math, number theory, two pointers	1700	x8292
1497D	Genius bitmasks, dp, graphs, number theory	2500	x1523
1497C2	k-LCM (hard version) constructive algorithms, math	1600	x17169
1495F	Squares constructive algorithms, data structures, dp, graphs, trees	3300	x294
1495E	Qingshan and Daniel brute force, data structures, greedy, implementation	3200	x414
1495D	BFS Trees combinatorics, dfs and similar, graphs, math, shortest paths, trees	2600	x1315
1495C	Garden of the Sun constructive algorithms, graphs	2300	x2621
1495B	Let's Go Hiking games, greedy	1900	x5992
1494F	Delete The Edges brute force, constructive algorithms, dfs and similar, graphs, implementation	2900	x371
1494E	A-Z Graph constructive algorithms, data structures, graphs, hashing	2400	x1755
1494D	Dogeforces constructive algorithms, data structures, dfs and similar, divide and conquer, dsu, greedy, sortings, trees	2300	x2562
1494C	1D Sokoban binary search, dp, greedy, implementation, two pointers	1900	x5399
1493F	Enchanted Matrix bitmasks, interactive, number theory	2600	x419
1493E	Enormous XOR bitmasks, constructive algorithms, greedy, math, strings, two pointers	2600	x926
1493D	GCD of an Array brute force, data structures, hashing, implementation, math, number theory, sortings, two pointers	2100	x4977
1493C	K-beautiful Strings binary search, brute force, constructive algorithms, greedy, strings	2000	x4589
1492E	Almost Fault-Tolerant Database brute force, constructive algorithms, dfs and similar, greedy, implementation	2500	x1178
1492D	Genius's Gambit bitmasks, constructive algorithms, greedy, math	1900	x6085
1491I	Ruler Of The Zoo brute force, data structures	3500	x82
1491H	Yuezheng Ling and Dynamic Tree data structures, trees	3400	x807
1491G	Switch and Flip constructive algorithms, graphs, math	2800	x820
1491F	Magnets binary search, constructive algorithms, interactive	2700	x994
1491E	Fib-tree brute force, dfs and similar, divide and conquer, number theory, trees	2400	x2147
1491D	Zookeeper and The Infinite Zoo bitmasks, constructive algorithms, dp, greedy, math	1800	x7156