Problemset - Codeforces

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

→ Pay attention

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

*has extra registration

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1468F	Full Turn geometry, hashing, number theory	1700	x3714
1468E	Four Segments greedy	800	x8786
1468D	Firecrackers binary search, sortings	1700	x4658
1468C	Berpizza data structures, implementation	1400	x7817
1468B	Bakery data structures, dsu	2900	x214
1468A	LaIS data structures, dp, greedy	2200	x1662
1467E	Distinctive Roots in a Tree data structures, dfs and similar, dp, trees	2500	x1437
1467D	Sum of Paths combinatorics, dp, math	2200	x3676
1467C	Three Bags constructive algorithms, greedy	1900	x6393
1467B	Hills And Valleys brute force, implementation	1700	x10933
1467A	Wizard of Orz constructive algorithms, greedy, math	900	x24317
1466I	The Riddle of the Sphinx binary search, data structures, data structures, interactive	3400	x197
1466H	Finding satisfactory solutions combinatorics, dp, graphs, greedy, math	3300	x272
1466G	Song of the Sirens combinatorics, divide and conquer, hashing, math, string suffix structures, strings	2600	x921
1466F	Euclid's nightmare bitmasks, dfs and similar, dsu, graphs, greedy, math, sortings	2100	x2868
1466E	Apollo versus Pan bitmasks, brute force, math	1800	x7299
1466D	13th Labour of Heracles data structures, greedy, sortings, trees	1500	x11334
1466C	Canine poetry dp, greedy, strings	1300	x17642
1466B	Last minute enhancements dp, greedy	800	x22653
1466A	Bovine Dilemma brute force, geometry, math	800	x22523
1464F	My Beautiful Madness data structures, trees	3500	x323
1463F	Max Correct Set bitmasks, dp, math	3100	x586
1463E	Plan of Lectures constructive algorithms, dfs and similar, dsu, graphs, implementation, sortings, trees	2400	x1514
1463D	Pairs binary search, constructive algorithms, greedy, two pointers	1900	x4427
1463C	Busy Robot implementation	1800	x5655
1463B	Find The Array bitmasks, constructive algorithms, greedy	1400	x19386
1463A	Dungeon binary search, math	1100	x25547
1462F	The Treasure of The Segments binary search, data structures, greedy	1800	x6966
1462E2	Close Tuples (hard version) binary search, combinatorics, implementation, math, sortings, two pointers	1700	x9692
1462E1	Close Tuples (easy version) binary search, combinatorics, math, sortings, two pointers	1500	x13729
1462D	Add to Neighbour and Remove greedy, math, number theory	1400	x16726
1462C	Unique Number brute force, greedy, math	900	x32518
1462B	Last Year's Substring dp, implementation, strings	800	x27110
1462A	Favorite Sequence implementation, two pointers	800	x41625
1461F	Mathematical Expression constructive algorithms, dp, greedy	2700	x551
1461E	Water Level brute force, graphs, greedy, implementation, math	2200	x2110
1461D	Divide and Summarize binary search, brute force, data structures, divide and conquer, implementation, sortings	1600	x9238
1461C	Random Events dp, math, probabilities	1500	x11215
1461B	Find the Spruce brute force, dp, implementation	1400	x12623
1461A	String Generation constructive algorithms, greedy	800	x18575
1459B	Move and Turn dp, math	1300	x14783
1459A	Red-Blue Shuffle math, probabilities	800	x16995
1458F	Range Diameter Sum data structures, trees	3500	x279
1458E	Nim Shortcuts data structures, games	3100	x493
1458D	Flip and Reverse data structures, graphs, greedy	3100	x1096
1458C	Latin Square math, matrices	2700	x1314
1458B	Glass Half Spilled dp	2000	x3539
1458A	Row GCD math, number theory	1600	x17704
1456E	XOR-ranges dp, greedy	3500	x277
1455G	Forbidden Value data structures, dp	2900	x409
1455F	String and Operations dp, greedy	2800	x442
1455E	Four Points brute force, constructive algorithms, flows, geometry, greedy, implementation, math, ternary search	2400	x1524
1455D	Sequence and Swaps dp, greedy, sortings	1600	x12314
1455C	Ping-pong constructive algorithms, games, math	1100	x19584
1455B	Jumps constructive algorithms, math	1200	x21813
1455A	Strange Functions math, number theory	800	x26423
1454F	Array Partition binary search, data structures, greedy, two pointers	2100	x4040
1454E	Number of Simple Paths combinatorics, dfs and similar, graphs, trees	2000	x5806
1454D	Number into Sequence constructive algorithms, math, number theory	1300	x20434
1454C	Sequence Transformation greedy, implementation	1200	x21437
1454B	Unique Bid Auction implementation	800	x28300
1454A	Special Permutation constructive algorithms, probabilities	800	x40513
1453F	Even Harder dp	2700	x837
1453E	Dog Snacks binary search, dfs and similar, dp, greedy, trees	2300	x2039
1453D	Checkpoints brute force, constructive algorithms, greedy, math, probabilities	1900	x4155
1453C	Triangles greedy, implementation	1700	x6033
1453B	Suffix Operations constructive algorithms, implementation	1400	x13332
1453A	Cancel the Trains implementation	800	x22602
1452G	Game On Tree data structures, dfs and similar, greedy, trees	2700	x487
1452F	Divide Powers constructive algorithms, greedy	2900	x317
1452E	Two Editorials brute force, dp, greedy, sortings, two pointers	2500	x1559
1452D	Radio Towers combinatorics, dp, math	1600	x7975
1452C	Two Brackets greedy	800	x19547
1452B	Toy Blocks binary search, greedy, math, sortings	1400	x14705
1452A	Robot Program math	800	x22105
1451F	Nullify The Matrix constructive algorithms, games	2700	x983
1451E2	Bitwise Queries (Hard Version) bitmasks, constructive algorithms, interactive, math	2300	x2965
1451E1	Bitwise Queries (Easy Version) bitmasks, constructive algorithms, interactive, math	2000	x4372
1451D	Circle Game games, geometry, math	1700	x9515
1451C	String Equality dp, greedy, hashing, implementation, strings	1400	x15566
1451B	Non-Substring Subsequence dp, greedy, implementation, strings	900	x19252
1451A	Subtract or Divide greedy, math	800	x24197
1450H2	Multithreading (Hard Version) combinatorics, implementation, math	3300	x218
1450H1	Multithreading (Easy Version) combinatorics, fft, math	2900	x435
1450G	Communism bitmasks, dp, trees	3500	x311
1450F	The Struggling Contestant constructive algorithms, greedy	2400	x1346
1450E	Capitalism constructive algorithms, dfs and similar, graphs, shortest paths	2700	x1121
1450D	Rating Compression binary search, data structures, greedy, implementation, two pointers	1800	x5475
1450C2	Errich-Tac-Toe (Hard Version) constructive algorithms, math	2300	x3698
1450C1	Errich-Tac-Toe (Easy Version) constructive algorithms, math	2100	x5499
1450B	Balls of Steel brute force, geometry, greedy	1000	x15183
1450A	Avoid Trygub constructive algorithms, sortings	800	x17979
1447B	Numbers Box greedy, math	1000	x16566
1447A	Add Candies constructive algorithms, math	800	x13785
1446F	Line Distance binary search, data structures, geometry	3200	x332
1446E	Long Recovery constructive algorithms, dfs and similar	3500	x85
1446D2	Frequency Problem (Hard Version) data structures, greedy, two pointers	3000	x1303
1446D1	Frequency Problem (Easy Version) data structures, greedy	2600	x1738
1446C	Xor Tree binary search, bitmasks, data structures, divide and conquer, dp, trees	2100	x3626
1446B	Catching Cheaters dp, strings	1800	x7837