Problemset - Codeforces

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Codeforces Round 940 (Div. 2) and CodeCraft-23
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bitmasks

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Problems

#	Name
1556G	Gates to Another World bitmasks, data structures, dsu, two pointers	3300	x301
1556F	Sports Betting bitmasks, combinatorics, dp, graphs, math, probabilities	2500	x1157
1556D	Take a Guess bitmasks, constructive algorithms, interactive, math	1800	x6440
1554C	Mikasa binary search, bitmasks, greedy, implementation	1800	x8480
1554B	Cobb bitmasks, brute force, greedy, math	1700	x12374
1553H	XOR and Distance bitmasks, divide and conquer, trees	2900	x666
1553C	Penalty bitmasks, brute force, dp, greedy	1200	x17243
1552G	A Serious Referee bitmasks, brute force, dfs and similar, sortings	3000	x445
1552D	Array Differentiation bitmasks, brute force, constructive algorithms, dfs and similar, dp, graphs, math	1800	x6671
1550E	Stringforces binary search, bitmasks, brute force, dp, strings, two pointers	2500	x1436
1548D1	Gregor and the Odd Cows (Easy) bitmasks, geometry, math, number theory	2300	x1425
1547D	Co-growing Sequence bitmasks, constructive algorithms, greedy	1300	x15904
1543E	The Final Pursuit bitmasks, constructive algorithms, divide and conquer, graphs, greedy, math	2700	x392
1543D1	RPD and Rap Sheet (Easy Version) bitmasks, constructive algorithms, interactive, math	1700	x7417
1543C	Need for Pink Slips bitmasks, brute force, dfs and similar, implementation, math, probabilities	1900	x5178
1533H	Submatrices *special problem, bitmasks, data structures, dp		x80
1530F	Bingo bitmasks, combinatorics, dp, math, probabilities	2600	x744
1527A	And Then There Were K bitmasks	800	x33699
1523F	Favorite Game bitmasks, dp	3300	x393
1523D	Love-Hate bitmasks, brute force, dp, probabilities	2400	x2068
1519F	Chests and Keys bitmasks, brute force, dfs and similar, dp, flows	3200	x380
1516C	Baby Ehab Partitions Again bitmasks, constructive algorithms, dp, math	1700	x11480
1516B	AGAGA XOOORRR bitmasks, brute force, dp, greedy	1500	x17967
1515H	Phoenix and Bits bitmasks, brute force, data structures, sortings	3500	x204
1514B	AND 0, Sum Big bitmasks, combinatorics, math	1200	x22473
1513B	AND Sequences bitmasks, combinatorics, constructive algorithms, math	1400	x13646
1511G	Chips on a Board bitmasks, brute force, data structures, dp, games, two pointers	2700	x695
1508C	Complete the MST bitmasks, brute force, data structures, dfs and similar, dsu, graphs, greedy, trees	2500	x1415
1500C	Matrix Sorting bitmasks, brute force, constructive algorithms, greedy, two pointers	2600	x759
1498F	Christmas Game bitmasks, data structures, dfs and similar, dp, games, math, trees	2500	x833
1498B	Box Fitting binary search, bitmasks, data structures, greedy	1300	x15991
1497D	Genius bitmasks, dp, graphs, number theory	2500	x1478
1494B	Berland Crossword bitmasks, brute force, greedy, implementation	1400	x13912
1494A	ABC String bitmasks, brute force, implementation	900	x20367
1493F	Enchanted Matrix bitmasks, interactive, number theory	2600	x372
1493E	Enormous XOR bitmasks, constructive algorithms, greedy, math, strings, two pointers	2600	x858
1492D	Genius's Gambit bitmasks, constructive algorithms, greedy, math	1900	x5918
1491D	Zookeeper and The Infinite Zoo bitmasks, constructive algorithms, dp, greedy, math	1800	x6847
1479D	Odd Mineral Resource binary search, bitmasks, brute force, data structures, probabilities, trees	2900	x943
1479C	Continuous City bitmasks, constructive algorithms	2500	x1252
1476E	Pattern Matching bitmasks, data structures, dfs and similar, graphs, hashing, sortings, strings	2300	x2237
1470B	Strange Definition bitmasks, graphs, hashing, math, number theory	1900	x6127
1469E	A Bit Similar bitmasks, brute force, hashing, string suffix structures, strings, two pointers	2400	x1844
1466F	Euclid's nightmare bitmasks, dfs and similar, dsu, graphs, greedy, math, sortings	2100	x2786
1466E	Apollo versus Pan bitmasks, brute force, math	1800	x6919
1463F	Max Correct Set bitmasks, dp, math	3100	x546
1463B	Find The Array bitmasks, constructive algorithms, greedy	1400	x18672
1451E2	Bitwise Queries (Hard Version) bitmasks, constructive algorithms, interactive, math	2300	x2819
1451E1	Bitwise Queries (Easy Version) bitmasks, constructive algorithms, interactive, math	2000	x4177
1450G	Communism bitmasks, dp, trees	3500	x226
1446C	Xor Tree binary search, bitmasks, data structures, divide and conquer, dp, trees	2100	x3378
1439E	Cheat and Win bitmasks, data structures, games, trees	3500	x213
1438E	Yurii Can Do Everything binary search, bitmasks, brute force, constructive algorithms, divide and conquer, two pointers	2500	x1287
1438D	Powerful Ksenia bitmasks, constructive algorithms, math	2200	x4051
1430G	Yet Another DAG Problem bitmasks, dfs and similar, dp, flows, graphs, math	2600	x607
1427E	Xum bitmasks, constructive algorithms, math, matrices, number theory	2500	x1256
1423J	Bubble Cup hypothesis bitmasks, constructive algorithms, dp, math	2400	x726
1423I	Lookup Tables bitmasks	3000	x100
1421A	XORwice bitmasks, greedy, math	800	x26894
1420B	Rock and Lever bitmasks, math	1200	x23425
1416C	XOR Inverse bitmasks, data structures, divide and conquer, dp, greedy, math, sortings, strings, trees	2000	x4154
1415D	XOR-gun bitmasks, brute force, constructive algorithms	2000	x5147
1411G	No Game No Life bitmasks, games, math, matrices	2700	x574
1411E	Poman Numbers bitmasks, greedy, math, strings	2300	x1551
1401F	Reverse and Swap binary search, bitmasks, data structures	2400	x1464
1400G	Mercenaries bitmasks, brute force, combinatorics, dp, dsu, math, two pointers	2600	x886
1398G	Running Competition bitmasks, fft, math, number theory	2600	x759
1395C	Boboniu and Bit Operations bitmasks, brute force, dp, greedy	1600	x13474
1392G	Omkar and Pies bitmasks, dfs and similar, dp, math, shortest paths	2900	x439
1392E	Omkar and Duck bitmasks, constructive algorithms, interactive, math	2100	x3232
1391D	505 bitmasks, brute force, constructive algorithms, dp, greedy, implementation	2000	x4912
1386C	Joker *special problem, bitmasks, data structures, divide and conquer, dsu	2800	x426
1385D	a-Good String bitmasks, brute force, divide and conquer, dp, implementation	1500	x18259
1383C	String Transformation 2 bitmasks, dp, graphs, trees	3100	x555
1383B	GameGame bitmasks, constructive algorithms, dp, games, greedy, math	1900	x4736
1368D	AND, OR and square sum bitmasks, greedy, math	1700	x11177
1365G	Secure Password bitmasks, combinatorics, constructive algorithms, interactive, math	2800	x911
1364E	X-OR bitmasks, constructive algorithms, divide and conquer, interactive, probabilities	2700	x1107
1362C	Johnny and Another Rating Drop bitmasks, greedy, math	1400	x16918
1362B	Johnny and His Hobbies bitmasks, brute force	1200	x18235
1361C	Johnny and Megan's Necklace binary search, bitmasks, constructive algorithms, dfs and similar, dsu, graphs	2500	x1373
1360H	Binary Median binary search, bitmasks, brute force, constructive algorithms	2100	x4275
1360F	Spy-string bitmasks, brute force, constructive algorithms, dp, hashing, strings	1700	x11801
1342F	Make It Ascending bitmasks, brute force, dp	3000	x663
1340B	Nastya and Scoreboard bitmasks, dp, graphs, greedy	1700	x7563
1338C	Perfect Triples bitmasks, brute force, constructive algorithms, divide and conquer, math	2200	x2952
1338B	Edge Weight Assignment bitmasks, constructive algorithms, dfs and similar, greedy, math, trees	1800	x8025
1336E2	Chiori and Doll Picking (hard version) bitmasks, brute force, combinatorics, math	3500	x280
1336E1	Chiori and Doll Picking (easy version) bitmasks, brute force, combinatorics, math	2700	x645
1334G	Substring Search bitmasks, brute force, fft	2900	x352
1332D	Walk on Matrix bitmasks, constructive algorithms, math	1700	x7803
1331C	...And after happily lived ever they *special problem, bitmasks		x3131
1329B	Dreamoon Likes Sequences bitmasks, combinatorics, math	1700	x6346
1327G	Letters and Question Marks bitmasks, dp, string suffix structures	2800	x400
1327F	AND Segments bitmasks, combinatorics, data structures, dp, two pointers	2500	x1599
1326F2	Wise Men (Hard Version) bitmasks, dp, math	3200	x455
1326F1	Wise Men (Easy Version) bitmasks, brute force, dp, meet-in-the-middle	2600	x804
1325D	Ehab the Xorcist bitmasks, constructive algorithms, greedy, number theory	1700	x11495
1322D	Reality Show bitmasks, dp	2800	x690
1322B	Present binary search, bitmasks, constructive algorithms, data structures, math, sortings	2100	x3881