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Codeforces Round #678 (Div. 2)
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Technocup 2021 - Elimination Round 1
22:56:02
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Before contest
Codeforces Round #679 (Div. 1, based on Technocup 2021 Elimination Round 1)
22:56:04
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Before contest
Codeforces Round #679 (Div. 2, based on Technocup 2021 Elimination Round 1)
22:56:04
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bitmasks

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Problems

#	Name
1421A	XORwice bitmasks, greedy, math	800	x12655
1430G	Yet Another DAG Problem bitmasks, dfs and similar, dp, flows, graphs, math	2600	x215
1427E	Xum bitmasks, constructive algorithms, math, matrices, number theory	2500	x639
1423J	Bubble Cup hypothesis bitmasks, constructive algorithms, dp, math	2400	x403
1423I	Lookup Tables bitmasks	3000	x40
1416C	XOR Inverse bitmasks, data structures, divide and conquer, dp, greedy, math, sortings, strings, trees	2000	x2031
1420B	Rock and Lever bitmasks, math	1200	x11800
1400G	Mercenaries bitmasks, brute force, combinatorics, dp, dsu, math, two pointers	2600	x467
1401F	Reverse and Swap binary search, bitmasks, data structures	2400	x908
1392G	Omkar and Pies bitmasks, dfs and similar, dp, math, shortest paths	2900	x208
1392E	Omkar and Duck bitmasks, constructive algorithms, interactive, math	2100	x2410
1398G	Running Competition bitmasks, fft, math, number theory	2600	x379
1395C	Boboniu and Bit Operations bitmasks, brute force, dp, greedy	1600	x8177
1391D	505 bitmasks, brute force, constructive algorithms, dp, greedy, implementation	2000	x3312
1383C	String Transformation 2 bitmasks, dp, graphs, trees	3100	x235
1383B	GameGame bitmasks, constructive algorithms, dp, games, greedy, math	1900	x3227
1386C	Joker *special problem, bitmasks, data structures, divide and conquer, dsu	2800	x134
1385D	a-Good String bitmasks, brute force, divide and conquer, dp, implementation	1500	x10426
1368D	AND, OR and square sum bitmasks, greedy, math	1700	x7313
1364E	X-OR bitmasks, constructive algorithms, divide and conquer, interactive, probabilities	2700	x622
1365G	Secure Password bitmasks, combinatorics, constructive algorithms, interactive, math	2800	x450
1361C	Johnny and Megan's Necklace binary search, bitmasks, constructive algorithms, dfs and similar, dsu, graphs	2500	x868
1362C	Johnny and Another Rating Drop bitmasks, greedy, math	1400	x11633
1362B	Johnny and His Hobbies bitmasks, brute force	1200	x13049
1360H	Binary Median binary search, bitmasks, brute force, constructive algorithms	2100	x3182
1360F	Spy-string bitmasks, brute force, constructive algorithms, dp, hashing, strings	1700	x7697
1342F	Make It Ascending bitmasks, brute force, dp	3000	x226
1340B	Nastya and Scoreboard bitmasks, dp, graphs, greedy	1700	x5900
1336E2	Chiori and Doll Picking (hard version) bitmasks, brute force, combinatorics, math	3500	x120
1336E1	Chiori and Doll Picking (easy version) bitmasks, brute force, combinatorics, math	2700	x407
1334G	Substring Search bitmasks, brute force, fft	2900	x224
1338C	Perfect Triples bitmasks, brute force, constructive algorithms, divide and conquer, math	2200	x2251
1338B	Edge Weight Assignment bitmasks, constructive algorithms, dfs and similar, greedy, math, trees	1800	x5807
1329B	Dreamoon Likes Sequences bitmasks, combinatorics, math	1700	x4883
1331C	...And after happily lived ever they bitmasks		x2690
1332D	Walk on Matrix bitmasks, constructive algorithms, math	1700	x6264
1327G	Letters and Question Marks bitmasks, dp, string suffix structures	2800	x258
1327F	AND Segments bitmasks, combinatorics, data structures, dp, two pointers	2500	x805
1326F2	Wise Men (Hard Version) bitmasks, dp, math	3200	x164
1326F1	Wise Men (Easy Version) bitmasks, brute force, dp, meet-in-the-middle	2600	x501
1325D	Ehab the Xorcist bitmasks, constructive algorithms, greedy, number theory	1700	x7573
1312C	Adding Powers bitmasks, greedy, implementation, math, number theory, ternary search	1400	x10546
1322D	Reality Show bitmasks, dp	2800	x337
1322B	Present binary search, bitmasks, constructive algorithms, data structures, math, sortings	2100	x2465
1316E	Team Building bitmasks, dp, greedy, sortings	2300	x1681
1305G	Kuroni and Antihype bitmasks, brute force, dp, dsu, graphs	3500	x238
1313D	Happy New Year bitmasks, dp, implementation	2500	x485
1303D	Fill The Bag bitmasks, greedy	1900	x4500
1299D	Around the World bitmasks, combinatorics, dfs and similar, dp, graphs, math, trees	3000	x202
1302F	Keep talking and nobody explodes -- easy bitmasks, brute force, expression parsing		x66
1292F	Nora's Toy Boxes bitmasks, combinatorics, dp	3500	x84
1288D	Minimax Problem binary search, bitmasks, dp	2000	x3916
1285D	Dr. Evil Underscores bitmasks, brute force, dfs and similar, divide and conquer, dp, greedy, strings, trees	1900	x4695
1270C	Make Good bitmasks, constructive algorithms, math	1400	x8825
1261F	Xor-Set bitmasks, divide and conquer, math	3100	x143
1257F	Make Them Similar bitmasks, brute force, hashing, meet-in-the-middle	2400	x1243
1242C	Sum Balance bitmasks, dfs and similar, dp, graphs	2400	x1029
1245F	Daniel and Spring Cleaning bitmasks, brute force, combinatorics, dp	2300	x1120
1225G	To Make 1 bitmasks, constructive algorithms, dp, greedy, number theory	3100	x170
1225C	p-binary bitmasks, brute force, math	1600	x6029
1238E	Keyboard Purchase bitmasks, dp	2200	x1677
1234F	Yet Another Substring Reverse bitmasks, dp	2200	x1457
1221G	Graph And Numbers bitmasks, brute force, combinatorics, dp, meet-in-the-middle	2900	x242
1220D	Alex and Julian bitmasks, math, number theory	1900	x2800
1215E	Marbles bitmasks, dp	2200	x1823
1209E2	Rotate Columns (hard version) bitmasks, dp, greedy, sortings	2500	x1074
1209E1	Rotate Columns (easy version) bitmasks, brute force, dp, greedy, sortings	2000	x1839
1217C	The Number Of Good Substrings binary search, bitmasks, brute force	1700	x5255
1214G	Feeling Good bitmasks, data structures	3200	x146
1208F	Bits And Pieces bitmasks, dfs and similar, dp, greedy	2600	x891
1207E	XOR Guessing bitmasks, interactive, math	1900	x3775
1205B	Shortest Cycle bitmasks, brute force, graphs, shortest paths	1900	x4425
1202A	You Are Given Two Binary Strings... bitmasks, greedy	1100	x6346
1194E	Count The Rectangles bitmasks, brute force, data structures, geometry, sortings	2200	x1244
1185G1	Playlist for Polycarp (easy version) bitmasks, combinatorics, dp	2100	x1619
1185F	Two Pizzas bitmasks, brute force	2100	x1281
1174D	Ehab and the Expected XOR Problem bitmasks, constructive algorithms	1900	x3400
1148F	Foo Fighters bitmasks, constructive algorithms	2700	x552
1168C	And Reachability bitmasks, dp	2200	x1523
1166E	The LCMs Must be Large bitmasks, brute force, constructive algorithms, math, number theory	2100	x1954
1163E	Magical Permutation bitmasks, brute force, constructive algorithms, data structures, graphs, math	2400	x364
1152F2	Neko Rules the Catniverse (Large Version) bitmasks, dp, matrices	3000	x170
1152F1	Neko Rules the Catniverse (Small Version) bitmasks, dp, matrices	2800	x184
1152B	Neko Performs Cat Furrier Transform bitmasks, constructive algorithms, dfs and similar, math	1300	x6501
1146E	Hot is Cold bitmasks, data structures, divide and conquer, implementation	2400	x550
1146C	Tree Diameter bitmasks, graphs, interactive	1700	x2520
1151B	Dima and a Bad XOR bitmasks, brute force, constructive algorithms, dp	1600	x6374
1145C	Mystery Circuit bitmasks, brute force		x632
1144E	Median String bitmasks, math, number theory, strings	1900	x2883
1117F	Crisp String bitmasks, dp	2500	x311
1117E	Decypher the String bitmasks, chinese remainder theorem, constructive algorithms, interactive, math	2200	x1043
1114F	Please, another Queries on Array? bitmasks, data structures, divide and conquer, math, number theory	2400	x996
1103D	Professional layer bitmasks, dp	3100	x218
1105E	Helping Hiasat bitmasks, brute force, dp, meet-in-the-middle	2200	x1105
1102F	Elongated Matrix binary search, bitmasks, brute force, dp, graphs	2000	x1079
1097H	Mateusz and an Infinite Sequence bitmasks, brute force, dp, strings	3400	x54
1097F	Alex and a TV Show bitmasks, combinatorics, number theory	2500	x760
1097B	Petr and a Combination Lock bitmasks, brute force, dp	1200	x12471
1095C	Powers Of Two bitmasks, greedy	1400	x8562
1093G	Multidimensional Queries bitmasks, data structures	2300	x1107

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