Problemset - Codeforces

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bitmasks

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Problems

#	Name
1421A	XORwice bitmasks, greedy, math	800	x29388
1420B	Rock and Lever bitmasks, math	1200	x26210
1416C	XOR Inverse bitmasks, data structures, divide and conquer, dp, greedy, math, sortings, strings, trees	2000	x4485
1415D	XOR-gun bitmasks, brute force, constructive algorithms	2000	x5495
1411G	No Game No Life bitmasks, games, math, matrices	2700	x677
1411E	Poman Numbers bitmasks, greedy, math, strings	2300	x1663
1401F	Reverse and Swap binary search, bitmasks, data structures	2400	x1767
1400G	Mercenaries bitmasks, brute force, combinatorics, dp, dsu, math, two pointers	2600	x981
1398G	Running Competition bitmasks, fft, math, number theory	2600	x1120
1395C	Boboniu and Bit Operations bitmasks, brute force, dp, greedy	1600	x14203
1392G	Omkar and Pies bitmasks, dfs and similar, dp, math, shortest paths	2900	x511
1392E	Omkar and Duck bitmasks, constructive algorithms, interactive, math	2100	x3546
1391D	505 bitmasks, brute force, constructive algorithms, dp, greedy, implementation	2000	x5347
1386C	Joker *special problem, bitmasks, data structures, divide and conquer, dsu	2800	x559
1385D	a-Good String bitmasks, brute force, divide and conquer, dp, implementation	1500	x19445
1383C	String Transformation 2 bitmasks, dp, graphs, trees	3100	x578
1383B	GameGame bitmasks, constructive algorithms, dp, games, greedy, math	1900	x5092
1368D	AND, OR and square sum bitmasks, greedy, math	1700	x11950
1365G	Secure Password bitmasks, combinatorics, constructive algorithms, interactive, math	2800	x1176
1364E	X-OR bitmasks, constructive algorithms, divide and conquer, interactive, probabilities	2700	x1437
1362C	Johnny and Another Rating Drop bitmasks, greedy, math	1400	x18578
1362B	Johnny and His Hobbies bitmasks, brute force	1200	x19309
1361C	Johnny and Megan's Necklace binary search, bitmasks, constructive algorithms, dfs and similar, dsu, graphs	2500	x1646
1360H	Binary Median binary search, bitmasks, brute force, constructive algorithms	2100	x4605
1360F	Spy-string bitmasks, brute force, constructive algorithms, dp, hashing, strings	1700	x12510
1342F	Make It Ascending bitmasks, brute force, dp	3000	x768
1340B	Nastya and Scoreboard bitmasks, dp, graphs, greedy	1700	x7874
1338C	Perfect Triples bitmasks, brute force, constructive algorithms, divide and conquer, math	2200	x3238
1338B	Edge Weight Assignment bitmasks, constructive algorithms, dfs and similar, greedy, math, trees	1800	x8517
1336E2	Chiori and Doll Picking (hard version) bitmasks, brute force, combinatorics, math	3500	x308
1336E1	Chiori and Doll Picking (easy version) bitmasks, brute force, combinatorics, math	2700	x691
1334G	Substring Search bitmasks, brute force, fft	2900	x374
1332D	Walk on Matrix bitmasks, constructive algorithms, math	1700	x8200
1331C	...And after happily lived ever they *special problem, bitmasks		x3156
1329B	Dreamoon Likes Sequences bitmasks, combinatorics, math	1700	x6716
1327G	Letters and Question Marks bitmasks, dp, string suffix structures	2800	x428
1327F	AND Segments bitmasks, combinatorics, data structures, dp, two pointers	2500	x1698
1326F2	Wise Men (Hard Version) bitmasks, dp, math	3200	x486
1326F1	Wise Men (Easy Version) bitmasks, brute force, dp, meet-in-the-middle	2600	x847
1325D	Ehab the Xorcist bitmasks, constructive algorithms, greedy, number theory	1700	x12195
1322D	Reality Show bitmasks, dp	2800	x757
1322B	Present binary search, bitmasks, constructive algorithms, data structures, math, sortings	2100	x4255
1316E	Team Building bitmasks, dp, greedy, sortings	2300	x4173
1313D	Happy New Year bitmasks, dp, implementation	2500	x1357
1312C	Adding Powers bitmasks, greedy, implementation, math, number theory, ternary search	1400	x16660
1305G	Kuroni and Antihype bitmasks, brute force, dp, dsu, graphs	3500	x1015
1303D	Fill The Bag bitmasks, greedy	1900	x7172
1302F	Keep talking and nobody explodes -- easy bitmasks, brute force, expression parsing		x74
1299D	Around the World bitmasks, combinatorics, dfs and similar, dp, graphs, graphs, math, trees	3000	x449
1292F	Nora's Toy Boxes bitmasks, combinatorics, dp	3500	x317
1288D	Minimax Problem binary search, bitmasks, dp	2000	x7291
1285D	Dr. Evil Underscores bitmasks, brute force, dfs and similar, divide and conquer, dp, greedy, strings, trees	1900	x7834
1270C	Make Good bitmasks, constructive algorithms, math	1400	x14171
1261F	Xor-Set bitmasks, divide and conquer, math	3100	x398
1257F	Make Them Similar bitmasks, brute force, hashing, meet-in-the-middle	2400	x2042
1245F	Daniel and Spring Cleaning bitmasks, brute force, combinatorics, dp	2300	x2011
1242C	Sum Balance bitmasks, dfs and similar, dp, graphs	2400	x1684
1238E	Keyboard Purchase bitmasks, dp	2200	x3067
1234F	Yet Another Substring Reverse bitmasks, dp	2200	x2619
1225G	To Make 1 bitmasks, constructive algorithms, dp, greedy, number theory	3100	x562
1225C	p-binary bitmasks, brute force, math	1600	x9037
1221G	Graph And Numbers bitmasks, brute force, combinatorics, dp, meet-in-the-middle	2900	x766
1220D	Alex and Julian bitmasks, math, number theory	1900	x3921
1217C	The Number Of Good Substrings binary search, bitmasks, brute force	1700	x7480
1215E	Marbles bitmasks, dp	2200	x3064
1214G	Feeling Good bitmasks, data structures	3200	x311
1209E2	Rotate Columns (hard version) bitmasks, dp, greedy, sortings	2500	x1985
1209E1	Rotate Columns (easy version) bitmasks, brute force, dp, greedy, sortings	2000	x2987
1208F	Bits And Pieces bitmasks, dfs and similar, dp, greedy	2600	x2544
1207E	XOR Guessing bitmasks, interactive, math	1900	x6005
1205B	Shortest Cycle bitmasks, brute force, graphs, shortest paths	1900	x6735
1202A	You Are Given Two Binary Strings... bitmasks, greedy	1100	x9411
1194E	Count The Rectangles bitmasks, brute force, data structures, geometry, sortings	2200	x1941
1185G1	Playlist for Polycarp (easy version) bitmasks, combinatorics, dp	2100	x2889
1185F	Two Pizzas bitmasks, brute force	2100	x2054
1174D	Ehab and the Expected XOR Problem bitmasks, constructive algorithms	1900	x4708
1168C	And Reachability bitmasks, dp	2200	x2435
1166E	The LCMs Must be Large bitmasks, brute force, constructive algorithms, math, number theory	2100	x2847
1163E	Magical Permutation bitmasks, brute force, constructive algorithms, data structures, graphs, math	2400	x687
1152F2	Neko Rules the Catniverse (Large Version) bitmasks, dp, matrices	3000	x675
1152F1	Neko Rules the Catniverse (Small Version) bitmasks, dp, matrices	2800	x575
1152B	Neko Performs Cat Furrier Transform bitmasks, constructive algorithms, dfs and similar, math	1300	x8954
1151B	Dima and a Bad XOR bitmasks, brute force, constructive algorithms, dp	1600	x11313
1148F	Foo Fighters bitmasks, constructive algorithms	2700	x1046
1146E	Hot is Cold bitmasks, data structures, divide and conquer, implementation	2400	x915
1146C	Tree Diameter bitmasks, graphs, interactive	1700	x3710
1145C	Mystery Circuit bitmasks, brute force		x807
1144E	Median String bitmasks, math, number theory, strings	1900	x4183
1117F	Crisp String bitmasks, dp	2500	x587
1117E	Decypher the String bitmasks, chinese remainder theorem, constructive algorithms, interactive, math	2200	x1533
1114F	Please, another Queries on Array? bitmasks, data structures, divide and conquer, math, number theory	2400	x1985
1105E	Helping Hiasat bitmasks, brute force, dp, meet-in-the-middle	2200	x1659
1103D	Professional layer bitmasks, dp	3100	x414
1102F	Elongated Matrix binary search, bitmasks, brute force, dp, graphs	2000	x2031
1097H	Mateusz and an Infinite Sequence bitmasks, brute force, dp, strings	3400	x95
1097F	Alex and a TV Show bitmasks, combinatorics, number theory	2500	x1269
1097B	Petr and a Combination Lock bitmasks, brute force, dp	1200	x29214
1095C	Powers Of Two bitmasks, greedy	1400	x17020
1093G	Multidimensional Queries bitmasks, data structures	2300	x1930
1088D	Ehab and another another xor problem bitmasks, constructive algorithms, implementation, interactive	2000	x2873