Problemset - Codeforces

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Codeforces Round #630 (Div. 2)
16:50:32
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bitmasks

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Problems

#	Name
579A	Raising Bacteria bitmasks	1000	x19043
467B	Fedor and New Game bitmasks, brute force, constructive algorithms, implementation	1200	x16493
476B	Dreamoon and WiFi bitmasks, brute force, combinatorics, dp, math, probabilities	1300	x12881
535B	Tavas and SaDDas bitmasks, brute force, combinatorics, implementation	1100	x11009
1097B	Petr and a Combination Lock bitmasks, brute force, dp	1200	x10213
550B	Preparing Olympiad bitmasks, brute force	1500	x8247
743B	Chloe and the sequence binary search, bitmasks, constructive algorithms, implementation	1200	x8232
1312C	Adding Powers bitmasks, greedy, implementation, math, number theory, ternary search	1400	x7814
1270C	Make Good bitmasks, constructive algorithms, math	1500	x7321
1095C	Powers Of Two bitmasks, greedy	1400	x7030
1042B	Vitamins bitmasks, brute force, dp, implementation	1200	x6595
611B	New Year and Old Property bitmasks, brute force, implementation	1300	x6227
912B	New Year's Eve bitmasks, constructive algorithms, number theory	1400	x6185
96B	Lucky Numbers (easy) binary search, bitmasks, brute force	1400	x6091
484A	Bits bitmasks, constructive algorithms	1700	x6040
276D	Little Girl and Maximum XOR bitmasks, dp, greedy, implementation, math	1800	x5865
202A	LLPS binary search, bitmasks, brute force, greedy, implementation, strings	900	x5859
1152B	Neko Performs Cat Furrier Transform bitmasks, constructive algorithms, dfs and similar, math	1300	x5750
1325D	Ehab the Xorcist bitmasks, constructive algorithms, greedy, number theory	1700	x5738
1202A	You Are Given Two Binary Strings... bitmasks, greedy	1100	x5631
913C	Party Lemonade bitmasks, dp, greedy	1600	x5239
1151B	Dima and a Bad XOR bitmasks, brute force, constructive algorithms, dp	1600	x5155
1225C	p-binary bitmasks, brute force, math	1600	x5019
580D	Kefa and Dishes bitmasks, dp	1900	x4807
437B	The Child and Set bitmasks, greedy, implementation, sortings	1500	x4621
1217C	The Number Of Good Substrings binary search, bitmasks, brute force	1600	x4587
677C	Vanya and Label bitmasks, combinatorics, implementation, strings	1500	x4483
706D	Vasiliy's Multiset binary search, bitmasks, data structures, trees	1800	x4402
1051D	Bicolorings bitmasks, dp	1700	x3935
224B	Array bitmasks, implementation, two pointers	1500	x3925
878A	Short Program bitmasks, constructive algorithms	1600	x3875
961C	Chessboard bitmasks, brute force, implementation	1400	x3852
1205B	Shortest Cycle bitmasks, brute force, graphs, shortest paths	1900	x3849
1285D	Dr. Evil Underscores bitmasks, brute force, dfs and similar, divide and conquer, dp, greedy, strings, trees	1800	x3696
1303D	Fill The Bag bitmasks, greedy	1800	x3597
812B	Sagheer, the Hausmeister bitmasks, brute force, dp	1600	x3561
1207E	XOR Guessing bitmasks, interactive, math	1800	x3330
242E	XOR on Segment bitmasks, data structures	2000	x3229
1288D	Minimax Problem binary search, bitmasks, dp	2000	x3090
510D	Fox And Jumping bitmasks, brute force, dp, math	2100	x3005
1174D	Ehab and the Expected XOR Problem bitmasks, constructive algorithms	1900	x2960
868C	Qualification Rounds bitmasks, brute force, constructive algorithms, dp	1500	x2911
570D	Tree Requests binary search, bitmasks, constructive algorithms, dfs and similar, graphs, trees	2400	x2762
244B	Undoubtedly Lucky Numbers bitmasks, brute force, dfs and similar	1600	x2741
960C	Subsequence Counting bitmasks, constructive algorithms, greedy, implementation	1700	x2722
453B	Little Pony and Harmony Chest bitmasks, brute force, dp	2200	x2622
888E	Maximum Subsequence bitmasks, divide and conquer, meet-in-the-middle	1800	x2554
1144E	Median String bitmasks, math, number theory, strings	1900	x2550
243A	The Brand New Function bitmasks	1900	x2527
581D	Three Logos bitmasks, brute force, constructive algorithms, geometry, implementation, math	1700	x2516
1220D	Alex and Julian bitmasks, math, number theory	1900	x2431
1017D	The Wu bitmasks, brute force, data structures	1900	x2377
165E	Compatible Numbers bitmasks, brute force, dfs and similar, dp	2100	x2348
27B	Tournament bitmasks, brute force, dfs and similar, greedy	2000	x2338
1146C	Tree Diameter bitmasks, graphs, interactive	1700	x2274
877E	Danil and a Part-time Job bitmasks, data structures, trees	2000	x2272
513B2	Permutations bitmasks, divide and conquer, math	1800	x2260
401D	Roman and Numbers bitmasks, brute force, combinatorics, dp, number theory	2000	x2235
959E	Mahmoud and Ehab and the xor-MST bitmasks, dp, graphs, implementation, math	1900	x2227
620E	New Year Tree bitmasks, data structures, trees	2100	x2080
981D	Bookshelves bitmasks, dp, greedy	1800	x2062
114B	PFAST Inc. bitmasks, brute force, graphs	1500	x2022
895C	Square Subsets bitmasks, combinatorics, dp, math	2000	x1934
1322B	Present binary search, bitmasks, constructive algorithms, data structures, math, sortings	2100	x1908
792D	Paths in a Complete Binary Tree bitmasks, trees	1800	x1900
1030E	Vasya and Good Sequences bitmasks, dp	2100	x1879
11D	A Simple Task bitmasks, dp, graphs	2200	x1878
1006F	Xor-Paths bitmasks, brute force, dp, meet-in-the-middle	2400	x1819
282E	Sausage Maximization bitmasks, data structures, trees	2100	x1812
707D	Persistent Bookcase bitmasks, data structures, dfs and similar, implementation	2100	x1772
778B	Bitwise Formula bitmasks, brute force, dfs and similar, expression parsing, implementation	2000	x1736
388B	Fox and Minimal path bitmasks, constructive algorithms, graphs, implementation, math	2000	x1733
1166E	The LCMs Must be Large bitmasks, brute force, constructive algorithms, math, number theory	2000	x1731
1088D	Ehab and another another xor problem bitmasks, constructive algorithms, implementation, interactive	2000	x1709
768E	Game of Stones bitmasks, dp, games	2000	x1707
442A	Borya and Hanabi bitmasks, brute force, implementation	2000	x1707
8C	Looking for Order bitmasks, dp	2000	x1680
1209E1	Rotate Columns (easy version) bitmasks, brute force, dp, greedy, sortings	2000	x1631
449D	Jzzhu and Numbers bitmasks, combinatorics, dp	2400	x1628
769D	k-Interesting Pairs Of Integers *special problem, bitmasks, brute force, meet-in-the-middle	1800	x1593
547C	Mike and Foam bitmasks, combinatorics, dp, math, number theory	2700	x1582
16E	Fish bitmasks, dp, probabilities	2100	x1577
1215E	Marbles bitmasks, dp	2200	x1566
291C	Network Mask *special problem, bitmasks, brute force, implementation	2100	x1555
993B	Open Communication bitmasks, brute force	1900	x1545
766E	Mahmoud and a xor trip bitmasks, constructive algorithms, data structures, dfs and similar, dp, math, trees	2200	x1529
900D	Unusual Sequences bitmasks, combinatorics, dp, math, number theory	2100	x1500
451E	Devu and Flowers bitmasks, combinatorics, number theory	2400	x1486
1185G1	Playlist for Polycarp (easy version) bitmasks, combinatorics, dp	2100	x1464
525E	Anya and Cubes binary search, bitmasks, brute force, dp, math, meet-in-the-middle	2200	x1460
1238E	Keyboard Purchase bitmasks, dp	2200	x1406
431D	Random Task binary search, bitmasks, combinatorics, dp, math	2200	x1404
417D	Cunning Gena bitmasks, dp, greedy, sortings	2000	x1400
744B	Hongcow's Game bitmasks, divide and conquer, interactive	2000	x1331
1316E	Team Building bitmasks, dp, greedy, sortings	2300	x1321
1168C	And Reachability bitmasks, dp	2400	x1318
333D	Characteristics of Rectangles binary search, bitmasks, brute force, implementation, sortings	2100	x1299
1234F	Yet Another Substring Reverse bitmasks, dp	2400	x1276
513C	Second price auction bitmasks, probabilities	2000	x1255
875D	High Cry binary search, bitmasks, combinatorics, data structures, divide and conquer	2200	x1246

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