Problemset - Codeforces

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Codeforces Round (Div. 3)
6 days

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Difficulty: —

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Problems

#	Name
1617A	Forbidden Subsequence constructive algorithms, greedy, sortings, strings	800	x16139
1615E	Purple Crayon data structures, dfs and similar, games, graphs, greedy, math, sortings, trees	2400	x1411
1614B	Divan and a New Project constructive algorithms, sortings	1000	x18210
1613B	Absent Remainder greedy, implementation, sortings	1000	x21294
1612G	Max Sum Array combinatorics, constructive algorithms, greedy, sortings	2500	x818
1612E	Messages brute force, dp, greedy, probabilities, sortings	2000	x2417
1608E	The Cells on the Paper binary search, implementation, sortings	2800	x425
1607H	Banquet Preparations 2 greedy, sortings, two pointers	2200	x1204
1607D	Blue-Red Permutation greedy, math, sortings	1300	x16501
1607C	Minimum Extraction brute force, sortings	1000	x24483
1606D	Red-Blue Matrix brute force, constructive algorithms, implementation, sortings	2400	x1409
1605E	Array Equalizer binary search, greedy, implementation, math, number theory, sortings, two pointers	2400	x1002
1605B	Reverse Sort greedy, sortings	1000	x17752
1601D	Difficult Mountain data structures, dp, greedy, sortings	2700	x1403
1601C	Optimal Insertion data structures, divide and conquer, dp, greedy, sortings	2300	x1944
1592B	Hemose Shopping constructive algorithms, dsu, math, sortings	1200	x15669
1592A	Gamer Hemose binary search, greedy, math, sortings	800	x21742
1584C	Two Arrays greedy, math, sortings	900	x16085
1583H	Omkar and Tours data structures, divide and conquer, sortings, trees	3300	x317
1579B	Shifting Sort implementation, sortings	1100	x17892
1575L	Longest Array Deconstruction data structures, divide and conquer, dp, sortings	2100	x1300
1575A	Another Sorting Problem data structures, sortings, strings	1100	x4263
1574C	Slay the Dragon binary search, greedy, sortings, ternary search	1300	x16674
1573B	Swaps greedy, math, sortings	1400	x14245
1572A	Book binary search, brute force, data structures, dp, graphs, implementation, sortings	1800	x8625
1569D	Inconvenient Pairs binary search, data structures, implementation, sortings, two pointers	1900	x4317
1566F	Points Movement data structures, dp, greedy, implementation, sortings	2600	x932
1566D2	Seating Arrangements (hard version) data structures, greedy, implementation, sortings, two pointers	1600	x7727
1566D1	Seating Arrangements (easy version) data structures, greedy, sortings	1100	x13831
1561C	Deep Down Below binary search, greedy, sortings	1300	x13781
1561A	Simply Strange Sort brute force, implementation, sortings	800	x16477
1560E	Polycarp and String Transformation binary search, implementation, sortings, strings	1800	x7743
1558F	Strange Sort data structures, sortings	3300	x359
1557B	Moamen and k-subarrays greedy, sortings	1100	x22984
1557A	Ezzat and Two Subsequences brute force, math, sortings	800	x27583
1555E	Boring Segments data structures, sortings, trees, two pointers	2100	x3893
1552G	A Serious Referee bitmasks, brute force, dfs and similar, sortings	3000	x459
1552F	Telepanting binary search, data structures, dp, sortings	2200	x2815
1552E	Colors and Intervals constructive algorithms, data structures, greedy, sortings	2300	x1788
1552C	Maximize the Intersections combinatorics, constructive algorithms, geometry, greedy, sortings	1800	x5809
1552B	Running for Gold combinatorics, graphs, greedy, sortings	1500	x15109
1552A	Subsequence Permutation sortings, strings	800	x23597
1551C	Interesting Story greedy, sortings, strings	1500	x12994
1550D	Excellent Arrays binary search, combinatorics, constructive algorithms, implementation, math, sortings, two pointers	2300	x1792
1547E	Air Conditioners data structures, dp, implementation, shortest paths, sortings, two pointers	1500	x14005
1545A	AquaMoon and Strange Sort sortings	1500	x13680
1540A	Great Graphs constructive algorithms, graphs, greedy, shortest paths, sortings	1400	x13743
1539F	Strange Array data structures, greedy, sortings	2600	x841
1539D	PriceFixed binary search, greedy, implementation, sortings, two pointers	1600	x11380
1539C	Stable Groups greedy, sortings	1200	x21594
1535B	Array Reodering brute force, greedy, math, number theory, sortings	900	x29838
1534H	Lost Nodes constructive algorithms, dp, graphs, interactive, sortings, trees	3500	x145
1534G	A New Beginning data structures, dp, geometry, sortings	3300	x538
1532D	Teams Forming *special problem, sortings		x582
1530C	Pursuit binary search, brute force, greedy, sortings	1200	x14318
1529B	Sifid and Strange Subsequences greedy, math, sortings	1100	x20395
1526A	Mean Inequality constructive algorithms, sortings	800	x23953
1525C	Robot Collisions data structures, greedy, implementation, sortings	2000	x4350
1519E	Off by One constructive algorithms, dfs and similar, geometry, graphs, sortings, trees	2700	x810
1519C	Berland Regional brute force, data structures, greedy, number theory, sortings	1400	x16218
1517B	Morning Jogging constructive algorithms, greedy, sortings	1200	x13103
1515I	Phoenix and Diamonds binary search, data structures, sortings	3400	x238
1515H	Phoenix and Bits bitmasks, brute force, data structures, sortings	3500	x219
1515D	Phoenix and Socks greedy, sortings, two pointers	1500	x11207
1514E	Baby Ehab's Hyper Apartment binary search, graphs, interactive, sortings, two pointers	2700	x591
1514D	Cut and Stick binary search, data structures, greedy, implementation, sortings	2000	x4126
1513F	Swapping Problem brute force, constructive algorithms, data structures, sortings	2500	x1206
1513E	Cost Equilibrium combinatorics, constructive algorithms, math, sortings	2300	x1422
1513D	GCD and MST constructive algorithms, dsu, graphs, greedy, number theory, sortings	2000	x5112
1508E	Tree Calendar brute force, constructive algorithms, data structures, dfs and similar, sortings, trees	3100	x330
1508D	Swap Pass constructive algorithms, geometry, sortings	3000	x533
1506F	Triangular Paths constructive algorithms, graphs, math, shortest paths, sortings	2000	x3121
1503D	Flip the Cards 2-sat, constructive algorithms, data structures, greedy, sortings, two pointers	2600	x977
1503C	Travelling Salesman Problem binary search, data structures, dp, greedy, shortest paths, sortings, two pointers	2200	x3227
1501B	Napoleon Cake dp, implementation, sortings	900	x18614
1500D	Tiles for Bathroom data structures, sortings, two pointers	2900	x422
1498E	Two Houses brute force, graphs, greedy, interactive, sortings	2200	x1848
1497A	Meximization brute force, data structures, greedy, sortings	800	x23967
1495A	Diamond Miner geometry, greedy, math, sortings	1200	x16786
1494D	Dogeforces constructive algorithms, data structures, dfs and similar, divide and conquer, dsu, greedy, sortings, trees	2300	x2511
1493D	GCD of an Array brute force, data structures, hashing, implementation, math, number theory, sortings, two pointers	2100	x4787
1490F	Equalize the Array binary search, data structures, greedy, math, sortings	1500	x15635
1487E	Cheap Dinner brute force, data structures, graphs, greedy, implementation, sortings, two pointers	2000	x4402
1487A	Arena implementation, sortings	800	x26261
1486B	Eastern Exhibition binary search, geometry, shortest paths, sortings	1500	x15428
1485F	Copy or Prefix Sum combinatorics, data structures, dp, sortings	2400	x1879
1480B	The Great Hero greedy, implementation, sortings	900	x16971
1478C	Nezzar and Symmetric Array implementation, math, sortings	1700	x9546
1477C	Nezzar and Nice Beatmap constructive algorithms, geometry, greedy, math, sortings	2200	x2221
1476G	Minimum Difference data structures, hashing, sortings, two pointers	3100	x537
1476E	Pattern Matching bitmasks, data structures, dfs and similar, graphs, hashing, sortings, strings	2300	x2260
1475G	Strange Beauty dp, math, number theory, sortings	1900	x6517
1475E	Advertising Agency combinatorics, math, sortings	1600	x13088
1475D	Cleaning the Phone binary search, dp, sortings, two pointers	1800	x9833
1474C	Array Destruction brute force, constructive algorithms, data structures, greedy, implementation, sortings	1700	x12289
1473A	Replacing Elements greedy, implementation, math, sortings	800	x33007
1472F	New Year's Puzzle brute force, dp, graph matchings, greedy, sortings	2100	x2960
1472E	Correct Placement binary search, data structures, dp, sortings, two pointers	1700	x7790
1472D	Even-Odd Game dp, games, greedy, sortings	1200	x26304
1470A	Strange Birthday Party binary search, dp, greedy, sortings, two pointers	1300	x21551