Problemset - Codeforces

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Codeforces Round 940 (Div. 2)
5 days

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Problems

#	Name
1416E	Split binary search, data structures, dp, greedy	3200	x267
1799H	Tree Cutting bitmasks, dfs and similar, dp	3200	x268
1470E	Strange Permutation binary search, combinatorics, data structures, dp, graphs, implementation, two pointers	3200	x289
1393E2	Twilight and Ancient Scroll (harder version) dp, hashing, implementation, string suffix structures, strings, two pointers	3200	x343
1774G	Segment Covering brute force, combinatorics, constructive algorithms, data structures, dp, trees	3200	x357
1746E2	Joking (Hard Version) dp, interactive	3200	x361
827F	Dirty Arkady's Kitchen data structures, dp, graphs, shortest paths	3200	x378
1519F	Chests and Keys bitmasks, brute force, dfs and similar, dp, flows	3200	x379
1603E	A Perfect Problem combinatorics, dp, math	3200	x393
1517F	Reunion combinatorics, dp, trees	3200	x433
750G	New Year and Binary Tree Paths bitmasks, brute force, combinatorics, dp	3200	x437
613E	Puzzle Lover dp, hashing, strings	3200	x452
1326F2	Wise Men (Hard Version) bitmasks, dp, math	3200	x455
1608F	MEX counting combinatorics, dp, implementation	3200	x513
553E	Kyoya and Train dp, fft, graphs, math, probabilities	3200	x526
1034E	Little C Loves 3 III bitmasks, dp, math	3200	x582
1621G	Weighted Increasing Subsequences data structures, dp, math	3200	x613
1810G	The Maximum Prefix dp	3200	x623
585F	Digits of Number Pi dp, implementation, strings	3200	x634
755G	PolandBall and Many Other Balls combinatorics, divide and conquer, dp, fft, math, number theory	3200	x845
1211H	Road Repair in Treeland *special problem, binary search, dp, trees	3100	x41
1954F	Unique Strings combinatorics, dp, math	3100	x116
662E	To Hack or not to Hack brute force, dp, greedy	3100	x129
379G	New Year Cactus dp	3100	x138
1895G	Two Characters, Two Colors binary search, data structures, dp, flows, greedy	3100	x167
891D	Sloth dfs and similar, dp, graph matchings, trees	3100	x168
1761F1	Anti-median (Easy Version) dp, math	3100	x195
1930G	Prefix Max Set Counting data structures, dp, trees	3100	x212
331E2	Deja Vu constructive algorithms, dp	3100	x215
720D	Slalom data structures, dp, sortings	3100	x221
1286F	Harry The Potter brute force, constructive algorithms, dp, fft, implementation, math	3100	x230
1120F	Secret Letters data structures, dp, greedy	3100	x246
513G3	Inversions problem dp	3100	x247
981H	K Paths combinatorics, data structures, dp, fft, math	3100	x260
830E	Perpetual Motion Machine constructive algorithms, dp, graphs, implementation, math, trees	3100	x271
1784E	Infinite Game brute force, combinatorics, dp, games, probabilities	3100	x297
468E	Permanent dp, graph matchings, math, meet-in-the-middle	3100	x304
1815E	Bosco and Particle dp, math, number theory, strings	3100	x318
1439D	INOI Final Contests combinatorics, dp, fft	3100	x336
1067D	Computer Game dp, greedy, math, probabilities	3100	x350
1647F	Madoka and Laziness dp, greedy	3100	x375
1349F1	Slime and Sequences (Easy Version) dp, fft, math	3100	x393
1103D	Professional layer bitmasks, dp	3100	x393
1481F	AB Tree dp, greedy, trees	3100	x449
626G	Raffles data structures, dp, greedy, math	3100	x516
1225G	To Make 1 bitmasks, constructive algorithms, dp, greedy, number theory	3100	x521
1463F	Max Correct Set bitmasks, dp, math	3100	x545
1383C	String Transformation 2 bitmasks, dp, graphs, trees	3100	x555
1503E	2-Coloring combinatorics, dp, math	3100	x585
1770F	Koxia and Sequence bitmasks, combinatorics, dp, math, number theory	3100	x590
1188D	Make Equal dp	3100	x659
1239E	Turtle dp, implementation	3100	x890
708E	Student's Camp dp, math	3100	x921
852H	Bob and stages dp, geometry	3000	x142
156E	Mrs. Hudson's Pancakes brute force, dp	3000	x159
1250D	Conference Problem dp	3000	x164
251E	Tree and Table dfs and similar, dp, implementation, trees	3000	x167
280E	Sequence Transformation brute force, data structures, dp, implementation, math	3000	x195
533D	Landmarks data structures, dp	3000	x214
1569F	Palindromic Hamiltonian Path brute force, dfs and similar, dp, graphs, hashing	3000	x224
1474F	1 2 3 4 ... dp, math, matrices	3000	x232
1743G	Antifibonacci Cut bitmasks, combinatorics, constructive algorithms, data structures, dp, hashing, math	3000	x241
1874E	Jellyfish and Hack dp, math	3000	x259
1572E	Polygon binary search, dp, geometry	3000	x276
778E	Selling Numbers dp, sortings	3000	x294
303E	Random Ranking dp, math, probabilities	3000	x309
1252D	Find String in a Grid data structures, dp, strings, trees	3000	x321
936D	World of Tank dp, greedy	3000	x321
1168D	Anagram Paths dp, implementation, trees	3000	x333
1776M	Parmigiana With Seafood binary search, dp, greedy, trees	3000	x336
436F	Banners brute force, data structures, dp	3000	x355
1854E	Game Bundles brute force, constructive algorithms, dp, greedy, math	3000	x373
264E	Roadside Trees data structures, dp	3000	x393
375E	Red and Black Tree dp, implementation, math	3000	x396
356E	Xenia and String Problem dp, hashing, implementation, string suffix structures, strings	3000	x399
1299D	Around the World bitmasks, combinatorics, dfs and similar, dp, graphs, graphs, math, trees	3000	x409
1763F	Edge Queries data structures, dfs and similar, dp, dsu, graphs, trees	3000	x416
1175G	Yet Another Partiton Problem data structures, divide and conquer, dp, geometry, two pointers	3000	x425
771E	Bear and Rectangle Strips dp, greedy	3000	x437
1381D	The Majestic Brown Tree Snake dfs and similar, dp, greedy, trees, two pointers	3000	x444
573D	Bear and Cavalry data structures, divide and conquer, dp	3000	x444
335F	Buy One, Get One Free dp, greedy	3000	x454
453D	Little Pony and Elements of Harmony dp, matrices	3000	x458
582E	Boolean Function bitmasks, dp, expression parsing	3000	x472
793F	Julia the snail data structures, divide and conquer, dp	3000	x504
1534F2	Falling Sand (Hard Version) dfs and similar, dp, graphs, greedy	3000	x508
889E	Mod Mod Mod binary search, dp, math	3000	x511
1028G	Guess the number dp, interactive	3000	x524
1442E	Black, White and Grey Tree binary search, constructive algorithms, dfs and similar, dp, greedy, trees	3000	x549
1842H	Tenzing and Random Real Numbers bitmasks, dp, graphs, math, probabilities	3000	x553
568E	Longest Increasing Subsequence data structures, dp	3000	x571
1707D	Partial Virtual Trees combinatorics, dfs and similar, dp, math, trees	3000	x572
1152F2	Neko Rules the Catniverse (Large Version) bitmasks, dp, matrices	3000	x585
1428G2	Lucky Numbers (Hard Version) dp, greedy	3000	x599
1603D	Artistic Partition divide and conquer, dp, number theory	3000	x605
1476F	Lanterns binary search, data structures, dp	3000	x609
1667E	Centroid Probabilities combinatorics, dp, fft, math	3000	x614
1320E	Treeland and Viruses data structures, dfs and similar, dp, shortest paths, trees	3000	x614
1097G	Vladislav and a Great Legend combinatorics, dp, trees	3000	x652
1149D	Abandoning Roads brute force, dp, graphs, greedy	3000	x659