Problemset - Codeforces

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Codeforces Round (Div. 3)
6 days

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Difficulty: —

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Problems

#	Name
1980E	Permutation of Rows and Columns constructive algorithms, data structures, greedy, hashing, implementation, math, matrices, sortings	1600	x7970
1970E3	Trails (Hard) dp, matrices	2200	x472
1970E2	Trails (Medium) dp, matrices	2000	x858
1924C	Fractal Origami geometry, math, matrices	2400	x1067
1919F2	Wine Factory (Hard Version) data structures, dp, flows, greedy, matrices	2800	x758
1916H2	Matrix Rank (Hard Version) combinatorics, dp, math, matrices, string suffix structures	2700	x508
1916H1	Matrix Rank (Easy Version) brute force, combinatorics, dp, math, matrices	2700	x589
1895F	Fancy Arrays combinatorics, dp, math, matrices	2600	x647
1864H	Asterism Stream dp, math, matrices	3200	x274
1844G	Tree Weights bitmasks, constructive algorithms, data structures, dfs and similar, implementation, math, matrices, number theory, trees	3000	x661
1814E	Chain Chips data structures, dp, matrices	2300	x1270
1808E2	Minibuses on Venus (medium version) combinatorics, divide and conquer, dp, matrices	2500	x658
1761E	Make It Connected binary search, brute force, constructive algorithms, dsu, graphs, greedy, matrices, trees, two pointers	2400	x1749
1743F	Intersection and Union data structures, dp, matrices, probabilities	2300	x1437
1713E	Cross Swapping 2-sat, data structures, dsu, greedy, matrices	2400	x1530
1701F	Points combinatorics, data structures, implementation, math, matrices	2500	x902
1699B	Almost Ternary Matrix bitmasks, constructive algorithms, matrices	900	x19303
1698G	Long Binary String bitmasks, math, matrices, meet-in-the-middle, number theory	2900	x307
1681E	Labyrinth Adventures data structures, dp, matrices, shortest paths	2600	x712
1672G	Cross Xor constructive algorithms, graphs, math, matrices	3200	x316
1662C	European Trip dp, graphs, math, matrices		x291
1648A	Weird Sum combinatorics, data structures, geometry, math, matrices, sortings	1400	x12029
1635D	Infinite Set bitmasks, dp, math, matrices, number theory, strings	1800	x6076
1616F	Tricolor Triangles brute force, graphs, math, matrices	2900	x586
1609E	William The Oblivious bitmasks, data structures, dp, matrices	2400	x1887
1599E	Two Arrays data structures, matrices	3200	x67
1557C	Moamen and XOR bitmasks, combinatorics, dp, math, matrices	1700	x8390
1540E	Tasty Dishes math, matrices	3500	x102
1538E	Funny Substrings data structures, hashing, implementation, matrices, strings	2100	x2831
1513C	Add One dp, matrices	1600	x13417
1511F	Chainword brute force, data structures, dp, matrices, string suffix structures, strings	2700	x422
1474F	1 2 3 4 ... dp, math, matrices	3000	x243
1458C	Latin Square math, matrices	2700	x1217
1427E	Xum bitmasks, constructive algorithms, math, matrices, number theory	2500	x1274
1411G	No Game No Life bitmasks, games, math, matrices	2700	x588
1402C	Star Trek *special problem, combinatorics, dfs and similar, dp, games, graphs, matrices, trees	2600	x200
1380F	Strange Addition data structures, dp, matrices	2600	x766
1375I	Cubic Lattice geometry, math, matrices, number theory	3500	x78
1344F	Piet's Palette matrices	3200	x305
1335F	Robots on a Grid data structures, dfs and similar, dsu, graphs, greedy, matrices	2200	x2010
1332E	Height All the Same combinatorics, constructive algorithms, math, matrices	2100	x3624
1286D	LCC data structures, math, matrices, probabilities	3100	x563
1266H	Red-Blue Graph dp, graphs, math, matrices, meet-in-the-middle	3400	x100
1252K	Addition Robot data structures, math, matrices	2100	x1807
1197F	Coloring Game dp, games, matrices	2700	x242
1188B	Count Pairs math, matrices, number theory, two pointers	2300	x4378
1184D2	Parallel Universes (Hard) math, matrices	3100	x103
1182E	Product Oriented Recurrence dp, math, matrices, number theory	2300	x2544
1152F2	Neko Rules the Catniverse (Large Version) bitmasks, dp, matrices	3000	x611
1152F1	Neko Rules the Catniverse (Small Version) bitmasks, dp, matrices	2800	x529
1151F	Sonya and Informatics combinatorics, dp, matrices, probabilities	2300	x1151
1117D	Magic Gems dp, math, matrices	2100	x4049
1106F	Lunar New Year and a Recursive Sequence math, matrices, number theory	2400	x956
1101G	(Zero XOR Subset)-less math, matrices	2300	x1623
1025E	Colored Cubes constructive algorithms, implementation, matrices	2700	x551
1023E	Down or Right constructive algorithms, interactive, matrices	2100	x1966
1012B	Chemical table constructive algorithms, dfs and similar, dsu, graphs, matrices	1900	x3665
989E	A Trance of Nightfall dp, geometry, matrices, probabilities	2700	x230
959F	Mahmoud and Ehab and yet another xor task bitmasks, dp, math, matrices	2400	x1955
954F	Runner's Problem dp, matrices, sortings	2100	x1048
946F	Fibonacci String Subsequences combinatorics, dp, matrices	2400	x535
923E	Perpetual Subtraction fft, math, matrices	3100	x442
917D	Stranger Trees dp, math, matrices, trees	2600	x1052
917C	Pollywog combinatorics, dp, matrices	2900	x387
891E	Lust combinatorics, math, matrices	3000	x871
865G	Flowers and Chocolate combinatorics, math, matrices	3300	x134
852B	Neural Network country dp, matrices	2000	x1390
837F	Prefix Sums binary search, brute force, combinatorics, math, matrices	2400	x746
832E	Vasya and Shifts matrices	2600	x312
821E	Okabe and El Psy Kongroo dp, matrices	2100	x1426
780F	Axel and Marston in Bitland bitmasks, dp, graphs, matrices	2400	x1027
750E	New Year and Old Subsequence data structures, divide and conquer, dp, matrices	2600	x1471
736D	Permutations math, matrices	2800	x452
718C	Sasha and Array data structures, math, matrices	2300	x3426
717D	Dexterina’s Lab games, matrices, probabilities	1900	x1386
696D	Legen... data structures, dp, matrices, strings	2500	x1240
696C	PLEASE combinatorics, dp, implementation, math, matrices	2000	x2056
691E	Xor-sequences matrices	1900	x2419
662A	Gambling Nim bitmasks, math, matrices, probabilities	2400	x430
632F	Magic Matrix brute force, divide and conquer, graphs, matrices, trees	2400	x1033
621E	Wet Shark and Blocks dp, matrices	2000	x2750
618G	Combining Slimes dp, math, matrices, probabilities	3300	x230
593E	Strange Calculation and Cats dp, matrices	2400	x452
582B	Once Again... constructive algorithms, dp, matrices	1900	x3320
578F	Mirror Box matrices, trees	3200	x540
576D	Flights for Regular Customers dp, matrices	2700	x1315
575A	Fibonotci data structures, math, matrices	2700	x770
551D	GukiZ and Binary Operations combinatorics, implementation, math, matrices, number theory	2100	x1809
514E	Darth Vader and Tree dp, matrices	2200	x1387
506E	Mr. Kitayuta's Gift combinatorics, dp, matrices, strings	3000	x700
498E	Stairs and Lines dp, matrices	2700	x451
497E	Subsequences Return dp, matrices	2900	x284
485A	Factory implementation, math, matrices	1400	x8117
472F	Design Tutorial: Change the Goal constructive algorithms, math, matrices	2700	x250
453D	Little Pony and Elements of Harmony dp, matrices	3000	x461
446E	DZY Loves Bridges math, matrices	3100	x121
446D	DZY Loves Games math, matrices, probabilities	2800	x384
392C	Yet Another Number Sequence combinatorics, math, matrices		x583
385E	Bear in the Field math, matrices	2300	x560
351C	Jeff and Brackets dp, matrices	2500	x541

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