Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round 945 (Div. 2)
47:18:23
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

bitmasks

Add tag

Problems

#	Name
1566B	MIN-MEX Cut bitmasks, constructive algorithms, dp, greedy	800	x19111
1560F2	Nearest Beautiful Number (hard version) bitmasks, brute force, constructive algorithms, dfs and similar, dp, greedy	2100	x4202
1560F1	Nearest Beautiful Number (easy version) binary search, bitmasks, brute force, constructive algorithms, dfs and similar, greedy	1900	x5919
1559A	Mocha and Math bitmasks, constructive algorithms, math	900	x28647
1557C	Moamen and XOR bitmasks, combinatorics, dp, math, matrices	1700	x8336
1556G	Gates to Another World bitmasks, data structures, dsu, two pointers	3300	x309
1556F	Sports Betting bitmasks, combinatorics, dp, graphs, math, probabilities	2500	x1177
1556D	Take a Guess bitmasks, constructive algorithms, interactive, math	1800	x6499
1554C	Mikasa binary search, bitmasks, greedy, implementation	1800	x8539
1554B	Cobb bitmasks, brute force, greedy, math	1700	x12431
1553H	XOR and Distance bitmasks, divide and conquer, trees	2900	x674
1553C	Penalty bitmasks, brute force, dp, greedy	1200	x17332
1552G	A Serious Referee bitmasks, brute force, dfs and similar, sortings	3000	x454
1552D	Array Differentiation bitmasks, brute force, constructive algorithms, dfs and similar, dp, graphs, math	1800	x6700
1550E	Stringforces binary search, bitmasks, brute force, dp, strings, two pointers	2500	x1441
1548D1	Gregor and the Odd Cows (Easy) bitmasks, geometry, math, number theory	2300	x1428
1547D	Co-growing Sequence bitmasks, constructive algorithms, greedy	1300	x16064
1543E	The Final Pursuit bitmasks, constructive algorithms, divide and conquer, graphs, greedy, math	2700	x394
1543D1	RPD and Rap Sheet (Easy Version) bitmasks, constructive algorithms, interactive, math	1700	x7443
1543C	Need for Pink Slips bitmasks, brute force, dfs and similar, implementation, math, probabilities	1900	x5185
1533H	Submatrices *special problem, bitmasks, data structures, dp		x80
1530F	Bingo bitmasks, combinatorics, dp, math, probabilities	2600	x752
1527A	And Then There Were K bitmasks	800	x33975
1523F	Favorite Game bitmasks, dp	3300	x399
1523D	Love-Hate bitmasks, brute force, dp, probabilities	2400	x2084
1519F	Chests and Keys bitmasks, brute force, dfs and similar, dp, flows	3200	x388
1516C	Baby Ehab Partitions Again bitmasks, constructive algorithms, dp, math	1700	x11531
1516B	AGAGA XOOORRR bitmasks, brute force, dp, greedy	1500	x18129
1515H	Phoenix and Bits bitmasks, brute force, data structures, sortings	3500	x215
1514B	AND 0, Sum Big bitmasks, combinatorics, math	1200	x22864
1513B	AND Sequences bitmasks, combinatorics, constructive algorithms, math	1400	x13787
1511G	Chips on a Board bitmasks, brute force, data structures, dp, games, two pointers	2700	x701
1508C	Complete the MST bitmasks, brute force, data structures, dfs and similar, dsu, graphs, greedy, trees	2500	x1424
1500C	Matrix Sorting bitmasks, brute force, constructive algorithms, greedy, two pointers	2600	x765
1498F	Christmas Game bitmasks, data structures, dfs and similar, dp, games, math, trees	2500	x852
1498B	Box Fitting binary search, bitmasks, data structures, greedy	1300	x16129
1497D	Genius bitmasks, dp, graphs, number theory	2500	x1483
1494B	Berland Crossword bitmasks, brute force, greedy, implementation	1400	x13955
1494A	ABC String bitmasks, brute force, implementation	900	x20425
1493F	Enchanted Matrix bitmasks, interactive, number theory	2600	x375
1493E	Enormous XOR bitmasks, constructive algorithms, greedy, math, strings, two pointers	2600	x864
1492D	Genius's Gambit bitmasks, constructive algorithms, greedy, math	1900	x5934
1491D	Zookeeper and The Infinite Zoo bitmasks, constructive algorithms, dp, greedy, math	1800	x6901
1479D	Odd Mineral Resource binary search, bitmasks, brute force, data structures, probabilities, trees	2900	x967
1479C	Continuous City bitmasks, constructive algorithms	2500	x1256
1476E	Pattern Matching bitmasks, data structures, dfs and similar, graphs, hashing, sortings, strings	2300	x2247
1470B	Strange Definition bitmasks, graphs, hashing, math, number theory	1900	x6153
1469E	A Bit Similar bitmasks, brute force, hashing, string suffix structures, strings, two pointers	2400	x1855
1466F	Euclid's nightmare bitmasks, dfs and similar, dsu, graphs, greedy, math, sortings	2100	x2794
1466E	Apollo versus Pan bitmasks, brute force, math	1800	x6999
1463F	Max Correct Set bitmasks, dp, math	3100	x552
1463B	Find The Array bitmasks, constructive algorithms, greedy	1400	x18786
1451E2	Bitwise Queries (Hard Version) bitmasks, constructive algorithms, interactive, math	2300	x2834
1451E1	Bitwise Queries (Easy Version) bitmasks, constructive algorithms, interactive, math	2000	x4202
1450G	Communism bitmasks, dp, trees	3500	x233
1446C	Xor Tree binary search, bitmasks, data structures, divide and conquer, dp, trees	2100	x3395
1439E	Cheat and Win bitmasks, data structures, games, trees	3500	x214
1438E	Yurii Can Do Everything binary search, bitmasks, brute force, constructive algorithms, divide and conquer, two pointers	2500	x1292
1438D	Powerful Ksenia bitmasks, constructive algorithms, math	2200	x4070
1430G	Yet Another DAG Problem bitmasks, dfs and similar, dp, flows, graphs, math	2600	x626
1427E	Xum bitmasks, constructive algorithms, math, matrices, number theory	2500	x1266
1423J	Bubble Cup hypothesis bitmasks, constructive algorithms, dp, math	2400	x735
1423I	Lookup Tables bitmasks	3000	x101
1421A	XORwice bitmasks, greedy, math	800	x27319
1420B	Rock and Lever bitmasks, math	1200	x23741
1416C	XOR Inverse bitmasks, data structures, divide and conquer, dp, greedy, math, sortings, strings, trees	2000	x4186
1415D	XOR-gun bitmasks, brute force, constructive algorithms	2000	x5182
1411G	No Game No Life bitmasks, games, math, matrices	2700	x579
1411E	Poman Numbers bitmasks, greedy, math, strings	2300	x1556
1401F	Reverse and Swap binary search, bitmasks, data structures	2400	x1528
1400G	Mercenaries bitmasks, brute force, combinatorics, dp, dsu, math, two pointers	2600	x902
1398G	Running Competition bitmasks, fft, math, number theory	2600	x773
1395C	Boboniu and Bit Operations bitmasks, brute force, dp, greedy	1600	x13525
1392G	Omkar and Pies bitmasks, dfs and similar, dp, math, shortest paths	2900	x442
1392E	Omkar and Duck bitmasks, constructive algorithms, interactive, math	2100	x3239
1391D	505 bitmasks, brute force, constructive algorithms, dp, greedy, implementation	2000	x4937
1386C	Joker *special problem, bitmasks, data structures, divide and conquer, dsu	2800	x430
1385D	a-Good String bitmasks, brute force, divide and conquer, dp, implementation	1500	x18383
1383C	String Transformation 2 bitmasks, dp, graphs, trees	3100	x561
1383B	GameGame bitmasks, constructive algorithms, dp, games, greedy, math	1900	x4768
1368D	AND, OR and square sum bitmasks, greedy, math	1700	x11232
1365G	Secure Password bitmasks, combinatorics, constructive algorithms, interactive, math	2800	x918
1364E	X-OR bitmasks, constructive algorithms, divide and conquer, interactive, probabilities	2700	x1114
1362C	Johnny and Another Rating Drop bitmasks, greedy, math	1400	x17059
1362B	Johnny and His Hobbies bitmasks, brute force	1200	x18384
1361C	Johnny and Megan's Necklace binary search, bitmasks, constructive algorithms, dfs and similar, dsu, graphs	2500	x1385
1360H	Binary Median binary search, bitmasks, brute force, constructive algorithms	2100	x4285
1360F	Spy-string bitmasks, brute force, constructive algorithms, dp, hashing, strings	1700	x11871
1342F	Make It Ascending bitmasks, brute force, dp	3000	x686
1340B	Nastya and Scoreboard bitmasks, dp, graphs, greedy	1700	x7574
1338C	Perfect Triples bitmasks, brute force, constructive algorithms, divide and conquer, math	2200	x2989
1338B	Edge Weight Assignment bitmasks, constructive algorithms, dfs and similar, greedy, math, trees	1800	x8093
1336E2	Chiori and Doll Picking (hard version) bitmasks, brute force, combinatorics, math	3500	x289
1336E1	Chiori and Doll Picking (easy version) bitmasks, brute force, combinatorics, math	2700	x650
1334G	Substring Search bitmasks, brute force, fft	2900	x353
1332D	Walk on Matrix bitmasks, constructive algorithms, math	1700	x7871
1331C	...And after happily lived ever they *special problem, bitmasks		x3134
1329B	Dreamoon Likes Sequences bitmasks, combinatorics, math	1700	x6389
1327G	Letters and Question Marks bitmasks, dp, string suffix structures	2800	x407
1327F	AND Segments bitmasks, combinatorics, data structures, dp, two pointers	2500	x1607