Problemset - Codeforces

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Codeforces Global Round 13
3 days

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Difficulty: —

bitmasks

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Problems

#	Name
1421A	XORwice bitmasks, greedy, math	800	x15557
202A	LLPS binary search, bitmasks, brute force, greedy, implementation, strings	800	x8708
579A	Raising Bacteria bitmasks	1000	x26139
467B	Fedor and New Game bitmasks, brute force, constructive algorithms, implementation	1100	x20944
535B	Tavas and SaDDas bitmasks, brute force, combinatorics, implementation	1100	x13844
1202A	You Are Given Two Binary Strings... bitmasks, greedy	1100	x6699
1362B	Johnny and His Hobbies bitmasks, brute force	1200	x13769
1097B	Petr and a Combination Lock bitmasks, brute force, dp	1200	x13324
1420B	Rock and Lever bitmasks, math	1200	x13199
743B	Chloe and the sequence binary search, bitmasks, constructive algorithms, implementation	1200	x9827
1042B	Vitamins bitmasks, brute force, dp, implementation	1200	x8727
476B	Dreamoon and WiFi bitmasks, brute force, combinatorics, dp, math, probabilities	1300	x17118
96B	Lucky Numbers (easy) binary search, bitmasks, brute force	1300	x7966
912B	New Year's Eve bitmasks, constructive algorithms, number theory	1300	x7386
611B	New Year and Old Property bitmasks, brute force, implementation	1300	x6929
1152B	Neko Performs Cat Furrier Transform bitmasks, constructive algorithms, dfs and similar, math	1300	x6784
27B	Tournament bitmasks, brute force, dfs and similar, greedy	1300	x3073
1362C	Johnny and Another Rating Drop bitmasks, greedy, math	1400	x12270
1312C	Adding Powers bitmasks, greedy, implementation, math, number theory, ternary search	1400	x11136
550B	Preparing Olympiad bitmasks, brute force	1400	x10522
1463B	Find The Array bitmasks, constructive algorithms, greedy	1400	x10241
1270C	Make Good bitmasks, constructive algorithms, math	1400	x9614
1095C	Powers Of Two bitmasks, greedy	1400	x9204
961C	Chessboard bitmasks, brute force, implementation	1400	x4363
1385D	a-Good String bitmasks, brute force, divide and conquer, dp, implementation	1500	x11313
437B	The Child and Set bitmasks, greedy, implementation, sortings	1500	x6065
677C	Vanya and Label bitmasks, combinatorics, implementation, strings	1500	x5028
224B	Array bitmasks, implementation, two pointers	1500	x4982
868C	Qualification Rounds bitmasks, brute force, constructive algorithms, dp	1500	x3401
114B	PFAST Inc. bitmasks, brute force, graphs	1500	x2356
1395C	Boboniu and Bit Operations bitmasks, brute force, dp, greedy	1600	x8881
1151B	Dima and a Bad XOR bitmasks, brute force, constructive algorithms, dp	1600	x6789
1225C	p-binary bitmasks, brute force, math	1600	x6388
913C	Party Lemonade bitmasks, dp, greedy	1600	x6109
878A	Short Program bitmasks, constructive algorithms	1600	x4310
812B	Sagheer, the Hausmeister bitmasks, brute force, dp	1600	x4211
244B	Undoubtedly Lucky Numbers bitmasks, brute force, dfs and similar	1600	x3146
243A	The Brand New Function bitmasks	1600	x2927
291C	Network Mask *special problem, bitmasks, brute force, implementation	1600	x1590
1360F	Spy-string bitmasks, brute force, constructive algorithms, dp, hashing, strings	1700	x8216
1325D	Ehab the Xorcist bitmasks, constructive algorithms, greedy, number theory	1700	x7976
276D	Little Girl and Maximum XOR bitmasks, dp, greedy, implementation, math	1700	x7737
1368D	AND, OR and square sum bitmasks, greedy, math	1700	x7720
484A	Bits bitmasks, constructive algorithms	1700	x7174
1332D	Walk on Matrix bitmasks, constructive algorithms, math	1700	x6538
1340B	Nastya and Scoreboard bitmasks, dp, graphs, greedy	1700	x6185
1217C	The Number Of Good Substrings binary search, bitmasks, brute force	1700	x5529
1329B	Dreamoon Likes Sequences bitmasks, combinatorics, math	1700	x5091
1051D	Bicolorings bitmasks, dp	1700	x4822
960C	Subsequence Counting bitmasks, constructive algorithms, greedy, implementation	1700	x3084
581D	Three Logos bitmasks, brute force, constructive algorithms, geometry, implementation, math	1700	x2717
1146C	Tree Diameter bitmasks, graphs, interactive	1700	x2624
769D	k-Interesting Pairs Of Integers *special problem, bitmasks, brute force, meet-in-the-middle	1700	x1798
442A	Borya and Hanabi bitmasks, brute force, implementation	1700	x1793
1338B	Edge Weight Assignment bitmasks, constructive algorithms, dfs and similar, greedy, math, trees	1800	x6100
580D	Kefa and Dishes bitmasks, dp	1800	x5815
706D	Vasiliy's Multiset binary search, bitmasks, data structures, trees	1800	x5457
1466E	Apollo versus Pan bitmasks, brute force, math	1800	x4892
888E	Maximum Subsequence bitmasks, divide and conquer, meet-in-the-middle	1800	x3378
513B2	Permutations bitmasks, divide and conquer, math	1800	x2357
778B	Bitwise Formula bitmasks, brute force, dfs and similar, expression parsing, implementation	1800	x1877
1285D	Dr. Evil Underscores bitmasks, brute force, dfs and similar, divide and conquer, dp, greedy, strings, trees	1900	x4994
1303D	Fill The Bag bitmasks, greedy	1900	x4746
1205B	Shortest Cycle bitmasks, brute force, graphs, shortest paths	1900	x4673
1470B	Strange Definition bitmasks, graphs, hashing, math, number theory	1900	x4232
1207E	XOR Guessing bitmasks, interactive, math	1900	x3977
1174D	Ehab and the Expected XOR Problem bitmasks, constructive algorithms	1900	x3522
1383B	GameGame bitmasks, constructive algorithms, dp, games, greedy, math	1900	x3512
510D	Fox And Jumping bitmasks, brute force, dp, math	1900	x3485
1144E	Median String bitmasks, math, number theory, strings	1900	x3018
1220D	Alex and Julian bitmasks, math, number theory	1900	x2924
1017D	The Wu bitmasks, brute force, data structures	1900	x2641
959E	Mahmoud and Ehab and the xor-MST bitmasks, dp, graphs, implementation, math	1900	x2597
981D	Bookshelves bitmasks, dp, greedy	1900	x2422
792D	Paths in a Complete Binary Tree bitmasks, trees	1900	x2238
16E	Fish bitmasks, dp, probabilities	1900	x2126
388B	Fox and Minimal path bitmasks, constructive algorithms, graphs, implementation, math	1900	x1908
993B	Open Communication bitmasks, brute force	1900	x1684
417D	Cunning Gena bitmasks, dp, greedy, sortings	1900	x1588
744B	Hongcow's Game bitmasks, divide and conquer, interactive	1900	x1447
285D	Permutation Sum bitmasks, combinatorics, dp, implementation, meet-in-the-middle	1900	x1277
232B	Table bitmasks, combinatorics, dp, math	1900	x1098
309C	Memory for Arrays binary search, bitmasks, greedy	1900	x775
1288D	Minimax Problem binary search, bitmasks, dp	2000	x4201
242E	XOR on Segment bitmasks, data structures	2000	x3967
1391D	505 bitmasks, brute force, constructive algorithms, dp, greedy, implementation	2000	x3528
1415D	XOR-gun bitmasks, brute force, constructive algorithms	2000	x3231
453B	Little Pony and Harmony Chest bitmasks, brute force, dp	2000	x3161
1451E1	Bitwise Queries (Easy Version) bitmasks, constructive algorithms, interactive, math	2000	x2798
877E	Danil and a Part-time Job bitmasks, data structures, trees	2000	x2721
401D	Roman and Numbers bitmasks, brute force, combinatorics, dp, number theory	2000	x2647
895C	Square Subsets bitmasks, combinatorics, dp, math	2000	x2538
1416C	XOR Inverse bitmasks, data structures, divide and conquer, dp, greedy, math, sortings, strings, trees	2000	x2417
1030E	Vasya and Good Sequences bitmasks, dp	2000	x2209
8C	Looking for Order bitmasks, dp	2000	x2096
1088D	Ehab and another another xor problem bitmasks, constructive algorithms, implementation, interactive	2000	x1964
1209E1	Rotate Columns (easy version) bitmasks, brute force, dp, greedy, sortings	2000	x1922
900D	Unusual Sequences bitmasks, combinatorics, dp, math, number theory	2000	x1875
803F	Coprime Subsequences bitmasks, combinatorics, number theory	2000	x1535
916B	Jamie and Binary Sequence (changed after round) bitmasks, greedy, math	2000	x1362

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