Problemset - Codeforces

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Codeforces Round (Div. 2)
6 days

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Problems

#	Name
1488A	From Zero To Y *special problem, math	900	x1414
1487G	String Counting combinatorics, dp, fft, math	2700	x595
1487F	Ones dp, greedy, shortest paths	2900	x382
1487E	Cheap Dinner brute force, data structures, graphs, greedy, implementation, sortings, two pointers	2000	x4553
1487D	Pythagorean Triples binary search, brute force, math, number theory	1500	x17926
1487C	Minimum Ties brute force, constructive algorithms, dfs and similar, graphs, greedy, implementation, math	1500	x14155
1487B	Cat Cycle math, number theory	1200	x21042
1487A	Arena implementation, sortings	800	x26528
1486F	Pairs of Paths combinatorics, data structures, dfs and similar, dp, trees	2600	x657
1486E	Paired Payment binary search, brute force, constructive algorithms, dp, flows, graphs, shortest paths	2200	x2917
1486D	Max Median binary search, data structures, dp	2100	x7268
1486C2	Guessing the Greatest (hard version) binary search, interactive	1900	x8478
1486C1	Guessing the Greatest (easy version) binary search, interactive	1600	x12207
1486B	Eastern Exhibition binary search, geometry, shortest paths, sortings	1500	x15975
1486A	Shifting Stacks greedy, implementation	900	x25371
1485F	Copy or Prefix Sum combinatorics, data structures, dp, sortings	2400	x1953
1485E	Move and Swap dfs and similar, dp, greedy, trees	2500	x1298
1485D	Multiples and Power Differences constructive algorithms, graphs, math, number theory	2200	x5155
1485C	Floor and Mod binary search, brute force, math, number theory	1700	x9953
1485B	Replace and Keep Sorted dp, implementation, math	1200	x17083
1485A	Add and Divide brute force, greedy, math, number theory	1000	x22485
1482H	Exam data structures, string suffix structures, trees	3400	x479
1482G	Vabank binary search, interactive	3200	x281
1482F	Useful Edges graphs, shortest paths	2400	x1531
1482E	Skyline Photo data structures, divide and conquer, dp	2100	x3185
1482D	Playlist data structures, dsu, implementation, shortest paths	1900	x3853
1482C	Basic Diplomacy brute force, constructive algorithms, greedy, implementation	1600	x9397
1482B	Restore Modulo implementation, math	1500	x9184
1482A	Prison Break math	800	x20425
1481F	AB Tree dp, greedy, trees	3100	x483
1481E	Sorting Books data structures, dp, greedy	2500	x2102
1481D	AB Graph brute force, constructive algorithms, graphs, greedy, implementation	2000	x4544
1481C	Fence Painting brute force, constructive algorithms, greedy	1600	x11638
1481B	New Colony brute force, greedy, implementation	1100	x19300
1481A	Space Navigation greedy, strings	800	x24934
1480B	The Great Hero greedy, implementation, sortings	900	x17171
1480A	Yet Another String Game games, greedy, strings	800	x25838
1479E	School Clubs dp, fft, math, number theory, probabilities	3500	x209
1479D	Odd Mineral Resource binary search, bitmasks, brute force, data structures, probabilities, trees	2900	x1016
1479C	Continuous City bitmasks, constructive algorithms	2500	x1327
1479B2	Painting the Array II constructive algorithms, data structures, dp, greedy, implementation	2100	x4054
1479B1	Painting the Array I constructive algorithms, data structures, dp, greedy, implementation	1900	x6965
1479A	Searching Local Minimum binary search, interactive, ternary search	1700	x11643
1478C	Nezzar and Symmetric Array implementation, math, sortings	1700	x9778
1478B	Nezzar and Lucky Number brute force, dp, greedy, math	1100	x18285
1478A	Nezzar and Colorful Balls brute force, greedy	800	x26466
1477F	Nezzar and Chocolate Bars combinatorics, fft, math, probabilities	3500	x132
1477E	Nezzar and Tournaments data structures, greedy	3300	x122
1477D	Nezzar and Hidden Permutations constructive algorithms, dfs and similar, graphs	2800	x550
1477C	Nezzar and Nice Beatmap constructive algorithms, geometry, greedy, math, sortings	2200	x2311
1477B	Nezzar and Binary String data structures, greedy	1900	x3212
1477A	Nezzar and Board constructive algorithms, math, number theory	1800	x5941
1476G	Minimum Difference data structures, hashing, sortings, two pointers	3100	x576
1476F	Lanterns binary search, data structures, dp	3000	x749
1476E	Pattern Matching bitmasks, data structures, dfs and similar, graphs, hashing, sortings, strings	2300	x2344
1476D	Journey dfs and similar, dp, dsu, implementation	1700	x8639
1476C	Longest Simple Cycle dp, graphs, greedy	1600	x11366
1476B	Inflation binary search, brute force, greedy, math	1300	x20026
1476A	K-divisible Sum binary search, constructive algorithms, greedy, math	1000	x37414
1475G	Strange Beauty dp, math, number theory, sortings	1900	x6830
1475F	Unusual Matrix 2-sat, brute force, constructive algorithms	1900	x5325
1475E	Advertising Agency combinatorics, math, sortings	1600	x13654
1475D	Cleaning the Phone binary search, dp, sortings, two pointers	1800	x10158
1475C	Ball in Berland combinatorics, graphs, math	1400	x21194
1475B	New Year's Number brute force, dp, math	900	x48869
1475A	Odd Divisor math, number theory	900	x60771
1474F	1 2 3 4 ... dp, math, matrices	3000	x245
1474E	What Is It? constructive algorithms, greedy	2500	x1335
1474D	Cleaning data structures, dp, greedy, math	2200	x3986
1474C	Array Destruction brute force, constructive algorithms, data structures, greedy, implementation, sortings	1700	x12702
1474B	Different Divisors binary search, constructive algorithms, greedy, math, number theory	1000	x28789
1474A	Puzzle From the Future greedy	800	x22452
1473G	Tiles combinatorics, dp, fft, math	2800	x395
1473F	Strange Set flows, math	2700	x961
1473E	Minimum Path graphs, shortest paths	2400	x3640
1473D	Program data structures, dp, implementation, strings	1700	x9649
1473C	No More Inversions constructive algorithms, math	1500	x12686
1473B	String LCM brute force, math, number theory, strings	1000	x31404
1473A	Replacing Elements greedy, implementation, math, sortings	800	x33727
1472G	Moving to the Capital dfs and similar, dp, graphs, shortest paths	2100	x4673
1472F	New Year's Puzzle brute force, dp, graph matchings, greedy, sortings	2100	x3064
1472E	Correct Placement binary search, data structures, dp, sortings, two pointers	1700	x8057
1472D	Even-Odd Game dp, games, greedy, sortings	1200	x27364
1472C	Long Jumps dp, graphs	1100	x31342
1472B	Fair Division dp, greedy, math	800	x50222
1472A	Cards for Friends greedy, math	800	x41917
1471B	Strange List brute force, greedy, implementation, math	1100	x19329
1471A	Strange Partition greedy, math, number theory	900	x26206
1470F	Strange Covering divide and conquer	3500	x120
1470E	Strange Permutation binary search, combinatorics, data structures, dp, graphs, implementation, two pointers	3200	x298
1470D	Strange Housing constructive algorithms, dfs and similar, graph matchings, graphs, greedy	2200	x3711
1470C	Strange Shuffle binary search, brute force, constructive algorithms, interactive	2500	x1333
1470B	Strange Definition bitmasks, graphs, hashing, math, number theory	1900	x6319
1470A	Strange Birthday Party binary search, dp, greedy, sortings, two pointers	1300	x22476
1469F	Power Sockets binary search, data structures, greedy	2600	x907
1469E	A Bit Similar bitmasks, brute force, hashing, string suffix structures, strings, two pointers	2400	x1972
1469D	Ceil Divisions brute force, constructive algorithms, math, number theory	1700	x9432
1469C	Building a Fence dp, greedy, implementation, two pointers	1600	x10751
1469B	Red and Blue dp, greedy	1000	x27315
1469A	Regular Bracket Sequence constructive algorithms, greedy	1000	x27419