Problemset - Codeforces

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Codeforces Round 950 (Div. 3)
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bitmasks

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Problems

#	Name
1583F	Defender of Childhood Dreams bitmasks, constructive algorithms, divide and conquer	2500	x1227
1582F1	Korney Korneevich and XOR (easy version) bitmasks, dp, greedy	1800	x5304
1571E	Fix the String *special problem, bitmasks, dp, greedy	1700	x327
1569E	Playoff Restoration bitmasks, brute force, hashing, implementation, meet-in-the-middle	2600	x787
1567C	Carrying Conundrum bitmasks, combinatorics, dp, math	1600	x11883
1567B	MEXor Mixup bitmasks, greedy	1000	x21728
1566C	MAX-MEX Cut bitmasks, constructive algorithms, dp, greedy	1000	x17090
1566B	MIN-MEX Cut bitmasks, constructive algorithms, dp, greedy	800	x19164
1560F2	Nearest Beautiful Number (hard version) bitmasks, brute force, constructive algorithms, dfs and similar, dp, greedy	2100	x4223
1560F1	Nearest Beautiful Number (easy version) binary search, bitmasks, brute force, constructive algorithms, dfs and similar, greedy	1900	x5948
1559A	Mocha and Math bitmasks, constructive algorithms, math	900	x28953
1557C	Moamen and XOR bitmasks, combinatorics, dp, math, matrices	1700	x8363
1556G	Gates to Another World bitmasks, data structures, dsu, two pointers	3300	x310
1556F	Sports Betting bitmasks, combinatorics, dp, graphs, math, probabilities	2500	x1181
1556D	Take a Guess bitmasks, constructive algorithms, interactive, math	1800	x6582
1554C	Mikasa binary search, bitmasks, greedy, implementation	1800	x8598
1554B	Cobb bitmasks, brute force, greedy, math	1700	x12492
1553H	XOR and Distance bitmasks, divide and conquer, trees	2900	x676
1553C	Penalty bitmasks, brute force, dp, greedy	1200	x17391
1552G	A Serious Referee bitmasks, brute force, dfs and similar, sortings	3000	x455
1552D	Array Differentiation bitmasks, brute force, constructive algorithms, dfs and similar, dp, graphs, math	1800	x6732
1550E	Stringforces binary search, bitmasks, brute force, dp, strings, two pointers	2500	x1449
1548D1	Gregor and the Odd Cows (Easy) bitmasks, geometry, math, number theory	2300	x1432
1547D	Co-growing Sequence bitmasks, constructive algorithms, greedy	1300	x16147
1543E	The Final Pursuit bitmasks, constructive algorithms, divide and conquer, graphs, greedy, math	2700	x396
1543D1	RPD and Rap Sheet (Easy Version) bitmasks, constructive algorithms, interactive, math	1700	x7467
1543C	Need for Pink Slips bitmasks, brute force, dfs and similar, implementation, math, probabilities	1900	x5197
1533H	Submatrices *special problem, bitmasks, data structures, dp		x81
1530F	Bingo bitmasks, combinatorics, dp, math, probabilities	2600	x754
1527A	And Then There Were K bitmasks	800	x34165
1523F	Favorite Game bitmasks, dp	3300	x405
1523D	Love-Hate bitmasks, brute force, dp, probabilities	2400	x2088
1519F	Chests and Keys bitmasks, brute force, dfs and similar, dp, flows	3200	x391
1516C	Baby Ehab Partitions Again bitmasks, constructive algorithms, dp, math	1700	x11578
1516B	AGAGA XOOORRR bitmasks, brute force, dp, greedy	1500	x18250
1515H	Phoenix and Bits bitmasks, brute force, data structures, sortings	3500	x218
1514B	AND 0, Sum Big bitmasks, combinatorics, math	1200	x23099
1513B	AND Sequences bitmasks, combinatorics, constructive algorithms, math	1400	x13898
1511G	Chips on a Board bitmasks, brute force, data structures, dp, games, two pointers	2700	x704
1508C	Complete the MST bitmasks, brute force, data structures, dfs and similar, dsu, graphs, greedy, trees	2500	x1431
1500C	Matrix Sorting bitmasks, brute force, constructive algorithms, greedy, two pointers	2600	x769
1498F	Christmas Game bitmasks, data structures, dfs and similar, dp, games, math, trees	2500	x857
1498B	Box Fitting binary search, bitmasks, data structures, greedy	1300	x16223
1497D	Genius bitmasks, dp, graphs, number theory	2500	x1489
1494B	Berland Crossword bitmasks, brute force, greedy, implementation	1400	x14003
1494A	ABC String bitmasks, brute force, implementation	900	x20465
1493F	Enchanted Matrix bitmasks, interactive, number theory	2600	x378
1493E	Enormous XOR bitmasks, constructive algorithms, greedy, math, strings, two pointers	2600	x869
1492D	Genius's Gambit bitmasks, constructive algorithms, greedy, math	1900	x5952
1491D	Zookeeper and The Infinite Zoo bitmasks, constructive algorithms, dp, greedy, math	1800	x6931
1479D	Odd Mineral Resource binary search, bitmasks, brute force, data structures, probabilities, trees	2900	x971
1479C	Continuous City bitmasks, constructive algorithms	2500	x1261
1476E	Pattern Matching bitmasks, data structures, dfs and similar, graphs, hashing, sortings, strings	2300	x2255
1470B	Strange Definition bitmasks, graphs, hashing, math, number theory	1900	x6175
1469E	A Bit Similar bitmasks, brute force, hashing, string suffix structures, strings, two pointers	2400	x1860
1466F	Euclid's nightmare bitmasks, dfs and similar, dsu, graphs, greedy, math, sortings	2100	x2802
1466E	Apollo versus Pan bitmasks, brute force, math	1800	x7044
1463F	Max Correct Set bitmasks, dp, math	3100	x555
1463B	Find The Array bitmasks, constructive algorithms, greedy	1400	x18856
1451E2	Bitwise Queries (Hard Version) bitmasks, constructive algorithms, interactive, math	2300	x2874
1451E1	Bitwise Queries (Easy Version) bitmasks, constructive algorithms, interactive, math	2000	x4231
1450G	Communism bitmasks, dp, trees	3500	x234
1446C	Xor Tree binary search, bitmasks, data structures, divide and conquer, dp, trees	2100	x3409
1439E	Cheat and Win bitmasks, data structures, games, trees	3500	x216
1438E	Yurii Can Do Everything binary search, bitmasks, brute force, constructive algorithms, divide and conquer, two pointers	2500	x1294
1438D	Powerful Ksenia bitmasks, constructive algorithms, math	2200	x4080
1430G	Yet Another DAG Problem bitmasks, dfs and similar, dp, flows, graphs, math	2600	x633
1427E	Xum bitmasks, constructive algorithms, math, matrices, number theory	2500	x1271
1423J	Bubble Cup hypothesis bitmasks, constructive algorithms, dp, math	2400	x739
1423I	Lookup Tables bitmasks	3000	x103
1421A	XORwice bitmasks, greedy, math	800	x27460
1420B	Rock and Lever bitmasks, math	1200	x23971
1416C	XOR Inverse bitmasks, data structures, divide and conquer, dp, greedy, math, sortings, strings, trees	2000	x4200
1415D	XOR-gun bitmasks, brute force, constructive algorithms	2000	x5208
1411G	No Game No Life bitmasks, games, math, matrices	2700	x581
1411E	Poman Numbers bitmasks, greedy, math, strings	2300	x1559
1401F	Reverse and Swap binary search, bitmasks, data structures	2400	x1538
1400G	Mercenaries bitmasks, brute force, combinatorics, dp, dsu, math, two pointers	2600	x907
1398G	Running Competition bitmasks, fft, math, number theory	2600	x778
1395C	Boboniu and Bit Operations bitmasks, brute force, dp, greedy	1600	x13577
1392G	Omkar and Pies bitmasks, dfs and similar, dp, math, shortest paths	2900	x444
1392E	Omkar and Duck bitmasks, constructive algorithms, interactive, math	2100	x3242
1391D	505 bitmasks, brute force, constructive algorithms, dp, greedy, implementation	2000	x4947
1386C	Joker *special problem, bitmasks, data structures, divide and conquer, dsu	2800	x432
1385D	a-Good String bitmasks, brute force, divide and conquer, dp, implementation	1500	x18459
1383C	String Transformation 2 bitmasks, dp, graphs, trees	3100	x564
1383B	GameGame bitmasks, constructive algorithms, dp, games, greedy, math	1900	x4779
1368D	AND, OR and square sum bitmasks, greedy, math	1700	x11271
1365G	Secure Password bitmasks, combinatorics, constructive algorithms, interactive, math	2800	x921
1364E	X-OR bitmasks, constructive algorithms, divide and conquer, interactive, probabilities	2700	x1118
1362C	Johnny and Another Rating Drop bitmasks, greedy, math	1400	x17185
1362B	Johnny and His Hobbies bitmasks, brute force	1200	x18438
1361C	Johnny and Megan's Necklace binary search, bitmasks, constructive algorithms, dfs and similar, dsu, graphs	2500	x1390
1360H	Binary Median binary search, bitmasks, brute force, constructive algorithms	2100	x4297
1360F	Spy-string bitmasks, brute force, constructive algorithms, dp, hashing, strings	1700	x11901
1342F	Make It Ascending bitmasks, brute force, dp	3000	x693
1340B	Nastya and Scoreboard bitmasks, dp, graphs, greedy	1700	x7628
1338C	Perfect Triples bitmasks, brute force, constructive algorithms, divide and conquer, math	2200	x3013
1338B	Edge Weight Assignment bitmasks, constructive algorithms, dfs and similar, greedy, math, trees	1800	x8140
1336E2	Chiori and Doll Picking (hard version) bitmasks, brute force, combinatorics, math	3500	x291