Problemset - Codeforces

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Codeforces Round 940 (Div. 2) and CodeCraft-23
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constructive algorithms

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Problems

#	Name
1939A	Draw Polygon Lines *special problem, constructive algorithms, dp, geometry, interactive		x14
1951I	Growing Trees binary search, constructive algorithms, flows, graphs, greedy	3200	x30
1193C	Scissors and Tape *special problem, constructive algorithms, geometry		x35
1170H	Longest Saw *special problem, constructive algorithms		x43
1912C	Cactus Transformation constructive algorithms	3300	x44
1533I	Excursions *special problem, constructive algorithms, dfs and similar, flows, graph matchings, graphs		x47
1280F	Intergalactic Sliding Puzzle combinatorics, constructive algorithms, math	3400	x55
1909H	Parallel Swaps Sort constructive algorithms, data structures	3500	x56
1580E	Railway Construction brute force, constructive algorithms, data structures, graphs, shortest paths	3400	x63
1070M	Algoland and Berland constructive algorithms, divide and conquer, geometry	3000	x63
1863I	Redundant Routes constructive algorithms, dp, trees	3500	x66
1654H	Three Minimums combinatorics, constructive algorithms, divide and conquer, dp, fft, math	3500	x68
737F	Dirty plates constructive algorithms, math	3300	x68
1868E	Min-Sum-Max constructive algorithms, dp, greedy	3500	x71
1750H	BinaryStringForces constructive algorithms, data structures, dp	3500	x71
923F	Public Service constructive algorithms, graphs, trees	3200	x71
1446E	Long Recovery constructive algorithms, dfs and similar	3500	x74
690F2	Tree of Life (medium) constructive algorithms, hashing, trees	2700	x76
1276E	Four Stones constructive algorithms	3500	x77
1940A	Parallel Universes *special problem, constructive algorithms, dfs and similar, dsu, graphs		x78
1349E	Slime and Hats constructive algorithms, dp, greedy	3500	x80
457E	Flow Optimality constructive algorithms, flows, math	3000	x80
1078E	Negative Time Summation constructive algorithms	3400	x85
1533G	Biome Map *special problem, constructive algorithms, dfs and similar, graphs		x86
1218G	Alpha planetary system constructive algorithms, graphs, shortest paths	3000	x86
1770H	Koxia, Mahiru and Winter Festival constructive algorithms	3500	x87
1656I	Neighbour Ordering constructive algorithms, graphs	3500	x92
1773J	Jumbled Trees constructive algorithms, math	2900	x95
1704G	Mio and Lucky Array constructive algorithms, fft, math, strings	3500	x95
1762G	Unequal Adjacent Elements constructive algorithms, sortings	3100	x96
720C	Homework constructive algorithms	3100	x96
198D	Cube Snake constructive algorithms	2700	x99
1267H	Help BerLine constructive algorithms	3200	x100
1718E	Impressionism constructive algorithms, graphs, implementation, math	3500	x101
1685D2	Permutation Weight (Hard Version) constructive algorithms, greedy	3500	x101
1827F	Copium Permutation constructive algorithms, data structures, greedy	3500	x104
1566H	Xor-quiz constructive algorithms, dp, interactive, math, number theory	3200	x108
1930H	Interactive Mex Tree constructive algorithms, dfs and similar, interactive, trees	3300	x111
1887F	Minimum Segments constructive algorithms	3400	x111
1737F	Ela and Prime GCD constructive algorithms, math, number theory	3300	x116
1045E	Ancient civilizations constructive algorithms, geometry	3200	x117
1205F	Beauty of a Permutation constructive algorithms, math	3400	x120
1940D	Almost Certainly *special problem, constructive algorithms, data structures, sortings		x121
1924F	Anti-Proxy Attendance constructive algorithms, dp, interactive, ternary search	3500	x121
1503F	Balance the Cards constructive algorithms, data structures, divide and conquer, geometry, graphs, implementation	3500	x125
1242E	Planar Perimeter constructive algorithms, graphs	3200	x126
1774H	Maximum Permutation constructive algorithms	3500	x127
472E	Design Tutorial: Learn from a Game constructive algorithms, implementation	2800	x127
1530G	What a Reversal constructive algorithms	3300	x131
48H	Black and White constructive algorithms	2800	x132
1707F	Bugaboo bitmasks, constructive algorithms, dp, number theory	3500	x138
74E	Shift It! constructive algorithms	2800	x140
1534H	Lost Nodes constructive algorithms, dp, graphs, interactive, sortings, trees	3500	x142
1302B	DAG constructive algorithms		x143
1615G	Maximum Adjacent Pairs constructive algorithms, graph matchings	3300	x146
317E	Princess and Her Shadow constructive algorithms, shortest paths	3100	x150
1758F	Decent Division constructive algorithms, data structures	3000	x151
1586I	Omkar and Mosaic combinatorics, constructive algorithms, math	3500	x154
1852E	Rivalries constructive algorithms, data structures, greedy	3400	x155
331E1	Deja Vu constructive algorithms, graphs, implementation	2900	x161
316F3	Suns and Rays constructive algorithms, dfs and similar, implementation	2200	x162
1956F	Nene and the Passing Game constructive algorithms, data structures, dsu, graphs, sortings	3000	x163
1934E	Weird LCM Operations brute force, constructive algorithms, number theory	3000	x163
1919G	Tree LGM constructive algorithms, divide and conquer, games, trees	3500	x164
1704H1	Game of AI (easy version) combinatorics, constructive algorithms, dp, fft, math	3200	x168
1940B	Three Arrays *special problem, constructive algorithms, implementation, sortings		x169
1571F	Kotlinforces *special problem, constructive algorithms, dp	2000	x175
1740G	Dangerous Laser Power constructive algorithms, dsu, sortings	3100	x176
736E	Chess Championship constructive algorithms, flows, greedy, math	2900	x177
98D	Help Monks constructive algorithms	2500	x178
933E	A Preponderant Reunion constructive algorithms, dp	3200	x184
1053E	Euler tour constructive algorithms, trees	3500	x192
290E	HQ *special problem, constructive algorithms	2500	x194
1060H	Sophisticated Device constructive algorithms	3300	x202
1663G	Six Characters *special problem, constructive algorithms, strings		x203
1939B	Evidence Board *special problem, constructive algorithms, dfs and similar, graphs, trees		x205
1267D	DevOps Best Practices constructive algorithms	2800	x205
398C	Tree and Array constructive algorithms		x207
1687E	Become Big For Me combinatorics, constructive algorithms, greedy, math, number theory	3500	x210
1815F	OH NO1 (-2-3-4) constructive algorithms, graphs, math	3500	x211
1781G	Diverse Coloring constructive algorithms, trees	3200	x212
1876E	Ball-Stackable constructive algorithms, data structures, dp, trees	3300	x213
1949K	Make Triangle constructive algorithms, math		x215
331E2	Deja Vu constructive algorithms, dp	3100	x215
815E	Karen and Neighborhood binary search, constructive algorithms, implementation	2900	x216
952G	Puzzling Language constructive algorithms	2200	x223
1270I	Xor on Figures constructive algorithms, fft, math	3500	x225
1286F	Harry The Potter brute force, constructive algorithms, dp, fft, implementation, math	3100	x230
715D	Create a Maze constructive algorithms	3100	x231
1684H	Hard Cut constructive algorithms, dfs and similar, divide and conquer, math	3400	x234
793E	Problem of offices constructive algorithms, dfs and similar, dp, trees	2900	x238
1743G	Antifibonacci Cut bitmasks, combinatorics, constructive algorithms, data structures, dp, hashing, math	3000	x241
1868D	Flower-like Pseudotree constructive algorithms, graphs, greedy, implementation, trees	3000	x243
173D	Deputies constructive algorithms, graphs, greedy, implementation	2500	x245
472F	Design Tutorial: Change the Goal constructive algorithms, math, matrices	2700	x247
1386A	Colors *special problem, binary search, constructive algorithms, interactive	2700	x248
1526F	Median Queries constructive algorithms, interactive, probabilities	3000	x249
1864G	Magic Square combinatorics, constructive algorithms, implementation	3100	x250
1054G	New Road Network constructive algorithms, greedy, math	3300	x250
1896G	Pepe Racing constructive algorithms, implementation, interactive, sortings	3200	x251

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