Problemset - Codeforces

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Educational Codeforces Round 81 (Rated for Div. 2)
04:57:19
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Problems

#	Name
1294F	Three Paths on a Tree dfs and similar, dp, greedy, trees	2100	x1783
1292F	Nora's Toy Boxes bitmasks, combinatorics, dp	3400	x27
1292D	Chaotic V. dp, graphs, greedy, math, number theory, trees	2700	x331
1292C	Xenon's Attack on the Gangs combinatorics, dfs and similar, dp, greedy, trees	2300	x873
1288D	Minimax Problem binary search, bitmasks, dp	2000	x2582
1288C	Two Arrays combinatorics, dp	1600	x4636
1285E	Delete a Segment brute force, constructive algorithms, data structures, dp, graphs, sortings, trees, two pointers	2300	x796
1285D	Dr. Evil Underscores bitmasks, brute force, dfs and similar, divide and conquer, dp, greedy, strings, trees	1800	x3124
1285B	Just Eat It! dp, greedy, implementation	1300	x8266
1286F	Harry The Potter brute force, constructive algorithms, dp, fft, implementation, math	3200	x48
1286A	Garland dp, greedy, sortings	1700	x3966
1284B	New Year and Ascent Sequence binary search, combinatorics, data structures, dp, implementation, sortings	1500	x6270
1283E	New Year Parties dp, greedy	1800	x2783
1279F	New Year and Handle Change binary search, dp	2800	x287
1279E	New Year Permutations combinatorics, dp	2700	x158
1282B2	K for the Price of One (Hard Version) dp, greedy, sortings	1600	x4817
1282B1	K for the Price of One (Easy Version) dp, greedy, sortings	1400	x5801
1268E	Happy Cactus dp	3400	x55
1268B	Domino for Young dp, greedy, math	2000	x2804
1278F	Cards combinatorics, dp, math, number theory, probabilities	2600	x399
1278C	Berry Jam data structures, dp, greedy, implementation	1600	x3884
1266H	Red-Blue Graph dp, graphs, math, matrices, meet-in-the-middle	3400	x13
1271E	Common Number binary search, combinatorics, dp, math	2100	x1500
1271D	Portals data structures, dp, greedy, implementation, sortings	2100	x1128
1280D	Miss Punyverse dp, greedy, trees	2700	x300
1276D	Tree Elimination dp, trees	2600	x129
1276A	As Simple as One and Two dp, greedy	1300	x5762
1272F	Two Bracket Sequences dp, strings, two pointers	2400	x726
1272D	Remove One Element brute force, dp	1500	x5377
1272C	Yet Another Broken Keyboard combinatorics, dp, implementation	1100	x8066
1265E	Beautiful Mirrors data structures, dp, math, probabilities	2100	x1259
1264D1	Beautiful Bracket Sequence (easy version) combinatorics, dp, probabilities	2600	x446
1263F	Economic Difficulties data structures, dfs and similar, dp, flows, graphs, trees	2500	x441
1260E	Tournament brute force, dp, greedy	2400	x905
1260D	A Game with Traps binary search, dp, greedy, sortings	1900	x2069
1227F1	Wrong Answer on test 233 (Easy Version) dp	2100	x943
1253E	Antenna Coverage data structures, dp, greedy, sortings	2200	x1481
1253C	Sweets Eating dp, greedy, math, sortings	1500	x5845
1257E	The Contest data structures, dp, greedy	2000	x2379
1257D	Yet Another Monster Killing Problem binary search, data structures, dp, greedy, sortings, two pointers	1700	x4072
1242C	Sum Balance bitmasks, dfs and similar, dp, graphs	2400	x860
1256E	Yet Another Division Into Teams dp, greedy, sortings	2200	x1934
1245F	Daniel and Spring Cleaning bitmasks, brute force, combinatorics, dp	2300	x951
1245E	Hyakugoku and Ladders dp, probabilities, shortest paths	2300	x727
1245C	Constanze's Machine dp	1400	x6767
1245B	Restricted RPS constructive algorithms, dp, greedy	1200	x7427
1250G	Discarding Game dp, greedy, two pointers	2400	x492
1250D	Conference Problem dp	3100	x59
1225G	To Make 1 bitmasks, constructive algorithms, dp, greedy, number theory	3000	x132
1225E	Rock Is Push binary search, dp	2200	x1078
1251E1	Voting (Easy Version) data structures, dp, greedy	2200	x1036
1252J	Tiling Terrace brute force, dp	2600	x420
1252D	Find String in a Grid data structures, dp, strings, trees	2900	x99
1252B	Cleaning Robots dp, trees	2600	x304
1249F	Maximum Weight Subset dp, trees	2500	x844
1249E	By Elevator or Stairs? dp, shortest paths	1700	x4035
1248D1	The World Is Just a Programming Task (Easy Version) brute force, dp, greedy, implementation	1900	x1345
1239E	Turtle dp, implementation	3100	x202
1239A	Ivan the Fool and the Probability Theory combinatorics, dp, math	1700	x4177
1236E	Alice and the Unfair Game binary search, data structures, dp, dsu	2600	x363
1237G	Balanced Distribution data structures, dp, greedy	3600	x34
1237F	Balanced Domino Placements combinatorics, dp	2600	x364
1237E	Balanced Binary Search Trees dp, math	2400	x740
1244D	Paint the Tree brute force, constructive algorithms, dp, graphs, implementation, trees	1700	x3871
1238F	The Maximum Subtree dfs and similar, dp, graphs, trees	2300	x844
1238E	Keyboard Purchase bitmasks, dp	2200	x1341
1238D	AB-string binary search, combinatorics, dp, strings	1800	x3182
1238C	Standard Free2play dp, greedy, math	1600	x4422
1223F	Stack Exterminable Arrays data structures, divide and conquer, dp, hashing	2600	x552
1223E	Paint the Tree dp, sortings, trees	2200	x1425
1223D	Sequence Sorting dp, greedy, two pointers	2000	x2348
1234F	Yet Another Substring Reverse bitmasks, dp	2400	x1202
1234C	Pipes dp, implementation	1400	x6338
1228E	Another Filling the Grid combinatorics, dp, math	2300	x1242
1210G	Mateusz and Escape Room dp	3400	x25
1216F	Wi-Fi data structures, dp, greedy	2300	x985
1221G	Graph And Numbers bitmasks, brute force, combinatorics, dp, meet-in-the-middle	2900	x193
1221D	Make The Fence Great Again dp	1700	x4191
1220E	Tourism dfs and similar, dp, dsu, graphs, greedy, trees	2200	x1330
1215E	Marbles bitmasks, dp	2200	x1455
1215B	The Number of Products combinatorics, dp, implementation	1500	x5802
1218C	Jumping Transformers dp	2800	x90
1218A	BubbleReactor dp, graphs	2800	x48
1209E2	Rotate Columns (hard version) bitmasks, dp, greedy, sortings	2400	x851
1209E1	Rotate Columns (easy version) bitmasks, brute force, dp, greedy, sortings	2000	x1564
1211H	Road Repair in Treeland *special problem, binary search, dp, trees	3000	x14
1214D	Treasure Island dfs and similar, dp, flows, hashing	1800	x3072
1208F	Bits And Pieces bitmasks, dfs and similar, dp, greedy	2600	x780
1207C	Gas Pipeline dp, greedy	1500	x5720
1204E	Natasha, Sasha and the Prefix Sums combinatorics, dp, math, number theory	2400	x798
1204C	Anna, Svyatoslav and Maps dp, graphs, greedy, shortest paths	1700	x4327
1206B	Make Product Equal One dp, implementation	900	x12009
1203F2	Complete the Projects (hard version) dp, greedy	2400	x1235
1200F	Graph Traveler brute force, data structures, dfs and similar, dp, graphs, implementation, math, number theory	2500	x557
1200D	White Lines brute force, data structures, dp, implementation, two pointers	1900	x2694
1200B	Block Adventure dp, greedy	1300	x8241
1202C	You Are Given a WASD-string... brute force, data structures, dp, greedy, implementation, math, strings	2100	x1367
1202B	You Are Given a Decimal String... brute force, dp, shortest paths	1700	x2876
1201D	Treasure Hunting binary search, dp, greedy, implementation	2000	x1343
1198D	Rectangle Painting 1 dp	2400	x1442

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