Problemset - Codeforces

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Codeforces Round 941 (Div. 1)
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Codeforces Round 941 (Div. 2)
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constructive algorithms

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Problems

#	Name
1939A	Draw Polygon Lines *special problem, constructive algorithms, dp, geometry, interactive		x14
1193C	Scissors and Tape *special problem, constructive algorithms, geometry		x35
1951I	Growing Trees binary search, constructive algorithms, flows, graphs, greedy	3200	x37
1170H	Longest Saw *special problem, constructive algorithms		x43
1912C	Cactus Transformation constructive algorithms	3300	x45
1533I	Excursions *special problem, constructive algorithms, dfs and similar, flows, graph matchings, graphs		x47
1280F	Intergalactic Sliding Puzzle combinatorics, constructive algorithms, math	3400	x56
1909H	Parallel Swaps Sort constructive algorithms, data structures	3500	x58
1580E	Railway Construction brute force, constructive algorithms, data structures, graphs, shortest paths	3400	x64
1070M	Algoland and Berland constructive algorithms, divide and conquer, geometry	3000	x64
1863I	Redundant Routes constructive algorithms, dp, trees	3500	x69
1654H	Three Minimums combinatorics, constructive algorithms, divide and conquer, dp, fft, math	3500	x69
737F	Dirty plates constructive algorithms, math	3300	x69
1868E	Min-Sum-Max constructive algorithms, dp, greedy	3500	x72
1750H	BinaryStringForces constructive algorithms, data structures, dp	3500	x72
923F	Public Service constructive algorithms, graphs, trees	3200	x72
1446E	Long Recovery constructive algorithms, dfs and similar	3500	x75
690F2	Tree of Life (medium) constructive algorithms, hashing, trees	2700	x77
1940A	Parallel Universes *special problem, constructive algorithms, dfs and similar, dsu, graphs		x78
1276E	Four Stones constructive algorithms	3500	x78
1349E	Slime and Hats constructive algorithms, dp, greedy	3500	x81
457E	Flow Optimality constructive algorithms, flows, math	3000	x81
1533G	Biome Map *special problem, constructive algorithms, dfs and similar, graphs		x86
1078E	Negative Time Summation constructive algorithms	3400	x86
1218G	Alpha planetary system constructive algorithms, graphs, shortest paths	3000	x87
1770H	Koxia, Mahiru and Winter Festival constructive algorithms	3500	x88
1656I	Neighbour Ordering constructive algorithms, graphs	3500	x93
1773J	Jumbled Trees constructive algorithms, math	2900	x95
1704G	Mio and Lucky Array constructive algorithms, fft, math, strings	3500	x96
1762G	Unequal Adjacent Elements constructive algorithms, sortings	3100	x97
720C	Homework constructive algorithms	3100	x97
198D	Cube Snake constructive algorithms	2700	x100
1267H	Help BerLine constructive algorithms	3200	x101
1718E	Impressionism constructive algorithms, graphs, implementation, math	3500	x102
1685D2	Permutation Weight (Hard Version) constructive algorithms, greedy	3500	x102
1827F	Copium Permutation constructive algorithms, data structures, greedy	3500	x106
1566H	Xor-quiz constructive algorithms, dp, interactive, math, number theory	3200	x110
1887F	Minimum Segments constructive algorithms	3400	x112
1930H	Interactive Mex Tree constructive algorithms, dfs and similar, interactive, trees	3300	x117
1737F	Ela and Prime GCD constructive algorithms, math, number theory	3300	x117
1045E	Ancient civilizations constructive algorithms, geometry	3200	x118
1205F	Beauty of a Permutation constructive algorithms, math	3400	x121
1940D	Almost Certainly *special problem, constructive algorithms, data structures, sortings		x123
1924F	Anti-Proxy Attendance constructive algorithms, dp, interactive, ternary search	3500	x123
1242E	Planar Perimeter constructive algorithms, graphs	3200	x127
472E	Design Tutorial: Learn from a Game constructive algorithms, implementation	2800	x128
1774H	Maximum Permutation constructive algorithms	3500	x129
1530G	What a Reversal constructive algorithms	3300	x132
1503F	Balance the Cards constructive algorithms, data structures, divide and conquer, geometry, graphs, implementation	3500	x133
48H	Black and White constructive algorithms	2800	x133
74E	Shift It! constructive algorithms	2800	x141
1534H	Lost Nodes constructive algorithms, dp, graphs, interactive, sortings, trees	3500	x143
1302B	DAG constructive algorithms		x143
1707F	Bugaboo bitmasks, constructive algorithms, dp, number theory	3500	x144
1615G	Maximum Adjacent Pairs constructive algorithms, graph matchings	3300	x147
317E	Princess and Her Shadow constructive algorithms, shortest paths	3100	x151
1758F	Decent Division constructive algorithms, data structures	3000	x152
1586I	Omkar and Mosaic combinatorics, constructive algorithms, math	3500	x156
1852E	Rivalries constructive algorithms, data structures, greedy	3400	x157
331E1	Deja Vu constructive algorithms, graphs, implementation	2900	x162
316F3	Suns and Rays constructive algorithms, dfs and similar, implementation	2200	x163
1919G	Tree LGM constructive algorithms, divide and conquer, games, trees	3500	x167
1934E	Weird LCM Operations brute force, constructive algorithms, number theory	3000	x169
1704H1	Game of AI (easy version) combinatorics, constructive algorithms, dp, fft, math	3200	x170
1940B	Three Arrays *special problem, constructive algorithms, implementation, sortings		x171
1571F	Kotlinforces *special problem, constructive algorithms, dp	2000	x176
1740G	Dangerous Laser Power constructive algorithms, dsu, sortings	3100	x177
98D	Help Monks constructive algorithms	2500	x179
736E	Chess Championship constructive algorithms, flows, greedy, math	2900	x182
933E	A Preponderant Reunion constructive algorithms, dp	3200	x185
1053E	Euler tour constructive algorithms, trees	3500	x193
290E	HQ *special problem, constructive algorithms	2500	x195
1663G	Six Characters *special problem, constructive algorithms, strings		x203
1267D	DevOps Best Practices constructive algorithms	2800	x206
398C	Tree and Array constructive algorithms		x207
1939B	Evidence Board *special problem, constructive algorithms, dfs and similar, graphs, trees		x208
1060H	Sophisticated Device constructive algorithms	3300	x209
1687E	Become Big For Me combinatorics, constructive algorithms, greedy, math, number theory	3500	x211
1956F	Nene and the Passing Game constructive algorithms, data structures, dsu, graphs, sortings	3000	x212
1815F	OH NO1 (-2-3-4) constructive algorithms, graphs, math	3500	x213
1781G	Diverse Coloring constructive algorithms, trees	3200	x213
1876E	Ball-Stackable constructive algorithms, data structures, dp, trees	3300	x214
331E2	Deja Vu constructive algorithms, dp	3100	x216
815E	Karen and Neighborhood binary search, constructive algorithms, implementation	2900	x218
1949K	Make Triangle constructive algorithms, math		x222
952G	Puzzling Language constructive algorithms	2200	x224
1270I	Xor on Figures constructive algorithms, fft, math	3500	x226
1286F	Harry The Potter brute force, constructive algorithms, dp, fft, implementation, math	3100	x233
715D	Create a Maze constructive algorithms	3100	x233
1684H	Hard Cut constructive algorithms, dfs and similar, divide and conquer, math	3400	x235
793E	Problem of offices constructive algorithms, dfs and similar, dp, trees	2900	x241
1868D	Flower-like Pseudotree constructive algorithms, graphs, greedy, implementation, trees	3000	x244
1743G	Antifibonacci Cut bitmasks, combinatorics, constructive algorithms, data structures, dp, hashing, math	3000	x244
173D	Deputies constructive algorithms, graphs, greedy, implementation	2500	x246
472F	Design Tutorial: Change the Goal constructive algorithms, math, matrices	2700	x248
1386A	Colors *special problem, binary search, constructive algorithms, interactive	2700	x249
1864G	Magic Square combinatorics, constructive algorithms, implementation	3100	x251
1526F	Median Queries constructive algorithms, interactive, probabilities	3000	x252
774H	Repairing Of String *special problem, constructive algorithms	2200	x252
1054G	New Road Network constructive algorithms, greedy, math	3300	x255

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