Problemset - Codeforces

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Educational Codeforces Round 131 (Rated for Div. 2)
40:52:29
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constructive algorithms

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Problems

#	Name
1656I	Neighbour Ordering constructive algorithms, graphs	3500	x33
1654H	Three Minimums combinatorics, constructive algorithms, divide and conquer, dp, fft, math	3500	x43
1446E	Long Recovery constructive algorithms, dfs and similar	3500	x48
1685D2	Permutation Weight (Hard Version) constructive algorithms, greedy	3500	x51
1276E	Four Stones constructive algorithms	3500	x59
1349E	Slime and Hats constructive algorithms, dp, greedy	3500	x64
1586I	Omkar and Mosaic combinatorics, constructive algorithms, math	3500	x78
1503F	Balance the Cards constructive algorithms, data structures, divide and conquer, geometry, graphs, implementation	3500	x85
1687E	Become Big For Me combinatorics, constructive algorithms, greedy, math, number theory	3500	x94
1534H	Lost Nodes constructive algorithms, dp, graphs, interactive, sortings, trees	3500	x106
1053E	Euler tour constructive algorithms, trees	3500	x151
1270I	Xor on Figures constructive algorithms, fft, math	3500	x158
1292E	Rin and The Unknown Flower constructive algorithms, greedy, interactive, math	3500	x190
1264F	Beautiful Fibonacci Problem constructive algorithms, number theory	3500	x266
1267C	Cactus Revenge constructive algorithms	3500	x364
1580E	Railway Construction brute force, constructive algorithms, data structures, graphs, shortest paths	3400	x40
1280F	Intergalactic Sliding Puzzle combinatorics, constructive algorithms, math	3400	x42
1078E	Negative Time Summation constructive algorithms	3400	x72
1205F	Beauty of a Permutation constructive algorithms, math	3400	x91
1684H	Hard Cut constructive algorithms, dfs and similar, divide and conquer, math	3400	x124
1097E	Egor and an RPG game constructive algorithms, greedy	3400	x368
737F	Dirty plates constructive algorithms, math	3300	x55
1530G	What a Reversal constructive algorithms	3300	x92
1615G	Maximum Adjacent Pairs constructive algorithms, graph matchings	3300	x108
1054G	New Road Network constructive algorithms, greedy, math	3300	x145
1060H	Sophisticated Device constructive algorithms	3300	x155
1495F	Squares constructive algorithms, data structures, dp, graphs, trees	3300	x159
1148G	Gold Experience constructive algorithms, graphs, math, number theory, probabilities	3300	x183
1237H	Balanced Reversals constructive algorithms	3300	x185
1517G	Starry Night Camping constructive algorithms, flows, graphs	3300	x241
1375H	Set Merging constructive algorithms, divide and conquer	3300	x260
923F	Public Service constructive algorithms, graphs, trees	3200	x57
1267H	Help BerLine constructive algorithms	3200	x62
1566H	Xor-quiz constructive algorithms, dp, interactive, math, number theory	3200	x74
1045E	Ancient civilizations constructive algorithms, geometry	3200	x102
1242E	Planar Perimeter constructive algorithms, graphs	3200	x114
933E	A Preponderant Reunion constructive algorithms, dp	3200	x130
543E	Listening to Music constructive algorithms, data structures	3200	x160
1672G	Cross Xor constructive algorithms, graphs, math, matrices	3200	x168
1656G	Cycle Palindrome constructive algorithms, graphs, math	3200	x170
1396E	Distance Matching constructive algorithms, dfs and similar, trees	3200	x241
566E	Restoring Map bitmasks, constructive algorithms, trees	3200	x378
1025G	Company Acquisitions constructive algorithms, math	3200	x379
1336D	Yui and Mahjong Set constructive algorithms, interactive	3200	x393
611H	New Year and Forgotten Tree constructive algorithms, flows, graphs	3200	x416
720C	Homework constructive algorithms	3100	x78
331E2	Deja Vu constructive algorithms, dp	3100	x120
317E	Princess and Her Shadow constructive algorithms, shortest paths	3100	x120
830E	Perpetual Motion Machine constructive algorithms, dp, graphs, implementation, math, trees	3100	x158
1286F	Harry The Potter brute force, constructive algorithms, dp, fft, implementation, math	3100	x160
1168E	Xor Permutations constructive algorithms, math	3100	x185
715D	Create a Maze constructive algorithms	3100	x189
1566G	Four Vertices constructive algorithms, data structures, graphs, greedy, implementation, shortest paths	3100	x238
1508E	Tree Calendar brute force, constructive algorithms, data structures, dfs and similar, sortings, trees	3100	x240
1329D	Dreamoon Likes Strings constructive algorithms, data structures	3100	x248
1225G	To Make 1 bitmasks, constructive algorithms, dp, greedy, number theory	3100	x267
1119G	Get Ready for the Battle constructive algorithms, implementation	3100	x301
804E	The same permutation constructive algorithms	3100	x340
538G	Berserk Robot constructive algorithms, math, sortings	3100	x349
1110G	Tree-Tac-Toe constructive algorithms, games, trees	3100	x411
1218G	Alpha planetary system constructive algorithms, graphs, shortest paths	3000	x31
1070M	Algoland and Berland constructive algorithms, divide and conquer, geometry	3000	x51
457E	Flow Optimality constructive algorithms, flows, math	3000	x64
1526F	Median Queries constructive algorithms, interactive, probabilities	3000	x152
1615H	Reindeer Games binary search, constructive algorithms, data structures, divide and conquer, flows, graphs, shortest paths	3000	x182
788D	Finding lines constructive algorithms, divide and conquer, interactive	3000	x243
1063E	Lasers and Mirrors constructive algorithms, math	3000	x264
1545D	AquaMoon and Wrong Coordinate constructive algorithms, interactive, math	3000	x301
798E	Mike and code of a permutation constructive algorithms, data structures, graphs, sortings	3000	x308
1637G	Birthday constructive algorithms, greedy, math	3000	x316
1508D	Swap Pass constructive algorithms, geometry, sortings	3000	x321
341E	Candies Game constructive algorithms, greedy	3000	x330
1610F	Mashtali: a Space Oddysey constructive algorithms, dfs and similar, graphs	3000	x335
1442E	Black, White and Grey Tree binary search, constructive algorithms, dfs and similar, dp, greedy, trees	3000	x342
1290D	Coffee Varieties (hard version) constructive algorithms, graphs, interactive	3000	x386
1019C	Sergey's problem constructive algorithms, graphs	3000	x796
618F	Double Knapsack constructive algorithms, two pointers	3000	x799
331E1	Deja Vu constructive algorithms, graphs, implementation	2900	x84
736E	Chess Championship constructive algorithms, flows, greedy, math	2900	x153
815E	Karen and Neighborhood binary search, constructive algorithms, implementation	2900	x185
793E	Problem of offices constructive algorithms, dfs and similar, dp, trees	2900	x199
1452F	Divide Powers constructive algorithms, greedy	2900	x215
1646F	Playing Around the Table constructive algorithms, greedy, implementation	2900	x261
1494F	Delete The Edges brute force, constructive algorithms, dfs and similar, graphs, implementation	2900	x277
1288F	Red-Blue Graph constructive algorithms, flows	2900	x313
1444D	Rectangular Polyline constructive algorithms, dp, geometry	2900	x338
1622F	Quadratic Set constructive algorithms, hashing, math, number theory	2900	x363
512E	Fox And Polygon constructive algorithms, divide and conquer	2900	x366
1172D	Nauuo and Portals constructive algorithms	2900	x371
1667D	Edge Elimination constructive algorithms, dfs and similar, dp, trees	2900	x378
48H	Black and White constructive algorithms	2800	x104
74E	Shift It! constructive algorithms	2800	x105
472E	Design Tutorial: Learn from a Game constructive algorithms, implementation	2800	x106
1267D	DevOps Best Practices constructive algorithms	2800	x166
1697F	Too Many Constraints 2-sat, constructive algorithms, graphs, implementation	2800	x199
1012D	AB-Strings constructive algorithms, strings	2800	x244
1698F	Equal Reversal constructive algorithms, graphs, implementation, math	2800	x248
1685D1	Permutation Weight (Easy Version) constructive algorithms, dfs and similar, dsu	2800	x256
1578A	Anti-Tetris constructive algorithms, graphs, shortest paths	2800	x261
1379E	Inverse Genealogy constructive algorithms, divide and conquer, dp, math, trees	2800	x263

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