Problemset - Codeforces

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Codeforces Round (Div. 2)
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Problems

#	Name
1828B	Permutation Swap math, number theory	900	x44479
1828A	Divisible Array constructive algorithms, math	800	x25652
1827F	Copium Permutation constructive algorithms, data structures, greedy	3500	x142
1827E	Bus Routes binary search, constructive algorithms, dfs and similar, greedy, trees	3400	x1211
1827D	Two Centroids data structures, dfs and similar, greedy, trees	2800	x1075
1827C	Palindrome Partition binary search, brute force, data structures, dp, hashing, strings	2600	x1817
1827B2	Range Sorting (Hard Version) binary search, data structures, dp, greedy	2400	x2431
1827B1	Range Sorting (Easy Version) binary search, dp, dsu, greedy, trees, two pointers	2000	x4685
1827A	Counting Orders combinatorics, math, sortings, two pointers	1100	x32020
1826F	Fading into Fog geometry, interactive, math, probabilities	2800	x494
1826E	Walk the Runway bitmasks, brute force, data structures, dp, graphs, implementation, sortings	2400	x2066
1826D	Running Miles brute force, dp, greedy	1700	x16465
1826C	Dreaming of Freedom greedy, math, number theory	1300	x16075
1826B	Lunatic Never Content math, number theory	1100	x31399
1826A	Trust Nobody brute force, greedy, implementation, sortings	1200	x17642
1825B	LuoTianyi and the Table greedy, math	1000	x16409
1825A	LuoTianyi and the Palindrome String greedy, strings	800	x21045
1824E	LuoTianyi and Cartridge data structures, trees	3500	x198
1824D	LuoTianyi and the Function data structures	3000	x871
1824C	LuoTianyi and XOR-Tree data structures, dfs and similar, dp, dsu, greedy, trees	2500	x1771
1824B2	LuoTianyi and the Floating Islands (Hard Version) combinatorics, dfs and similar, math, probabilities, trees	2300	x3676
1824B1	LuoTianyi and the Floating Islands (Easy Version) combinatorics, math, probabilities, trees	1800	x6516
1824A	LuoTianyi and the Show greedy, implementation	1400	x12747
1823F	Random Walk dp, graphs, math, probabilities, trees	2600	x1437
1823E	Removing Graph brute force, dp, games, graphs, math	2500	x1522
1823D	Unique Palindromes constructive algorithms, math, strings	1900	x4393
1823C	Strongly Composite greedy, math, number theory	1300	x14075
1823B	Sort with Step brute force, math, sortings	900	x18424
1823A	A-characteristic combinatorics, constructive algorithms, math	800	x17396
1822G2	Magic Triples (Hard Version) brute force, data structures, math, number theory	2200	x3192
1822G1	Magic Triples (Easy Version) brute force, data structures, math, number theory	1700	x10180
1822F	Gardening Friends brute force, dfs and similar, dp, graphs, trees	1700	x7999
1822E	Making Anti-Palindromes greedy, math, strings	1600	x12720
1822D	Super-Permutation constructive algorithms, math	1200	x19378
1822C	Bun Lover math	800	x25141
1822B	Karina and Array greedy, math, sortings	800	x26825
1822A	TubeTube Feed brute force, implementation	800	x26322
1821F	Timber combinatorics, dp, fft, math	2600	x1040
1821E	Rearrange Brackets brute force, dp, greedy, sortings, strings	2100	x2809
1821D	Black Cells binary search, brute force, greedy, math	1900	x5663
1821C	Tear It Apart brute force, implementation, math, strings	1300	x16592
1821B	Sort the Subarray brute force, greedy	1100	x31568
1821A	Matching combinatorics, math	800	x21528
1820B	JoJo's Incredible Adventures math, strings, two pointers	1100	x25658
1820A	Yura's New Name implementation, strings	800	x17845
1819F	Willy-nilly, Crack, Into Release! data structures, dp	3500	x223
1819E	Roads in E City interactive, math, probabilities, trees	3200	x392
1819D	Misha and Apples brute force, data structures, dp, two pointers	2800	x968
1819C	The Fox and the Complete Tree Traversal constructive algorithms, dp, implementation, math, trees	2400	x1800
1819B	The Butcher geometry, greedy, implementation, sortings, two pointers	1900	x4399
1819A	Constructive Problem brute force, greedy	1300	x14884
1818B	Indivisible constructive algorithms	900	x17414
1818A	Politics greedy, implementation	800	x14737
1817F	Entangled Substrings string suffix structures, strings	3500	x445
1817E	Half-sum brute force, divide and conquer, greedy	3400	x392
1817D	Toy Machine constructive algorithms, games, implementation	2700	x1075
1817C	Similar Polynomials combinatorics, math	2400	x1268
1817B	Fish Graph brute force, constructive algorithms, dfs and similar, graphs	1900	x5354
1817A	Almost Increasing Subsequence binary search, data structures, greedy	1500	x13011
1816B	Grid Reconstruction constructive algorithms, greedy	1000	x16976
1816A	Ian Visits Mary constructive algorithms, geometry, number theory	800	x19099
1815F	OH NO1 (-2-3-4) constructive algorithms, graphs, math	3500	x340
1815E	Bosco and Particle dp, math, number theory, strings	3100	x500
1815D	XOR Counting bitmasks, combinatorics, dp, math	2600	x1574
1815C	Between constructive algorithms, dfs and similar, graphs, greedy	2200	x2453
1815B	Sum Graph brute force, constructive algorithms, graphs, implementation, interactive, shortest paths, trees	2000	x3730
1815A	Ian and Array Sorting greedy, math	1300	x16322
1814F	Communication Towers brute force, divide and conquer, dsu	2700	x1058
1814E	Chain Chips data structures, dp, matrices	2300	x1882
1814D	Balancing Weapons binary search, brute force, data structures, math, two pointers	2500	x1083
1814C	Search in Parallel constructive algorithms, greedy, sortings	1500	x12749
1814B	Long Legs brute force, math	1700	x11947
1814A	Coins implementation, math	800	x58951
1812J	Unmysterious Language *special problem, constructive algorithms, strings		x6329
1812I	Mountain Climber *special problem		x296
1812H	Expected Twist *special problem, interactive		x178
1812G	Colour Vision *special problem, implementation		x633
1812F	Factorization *special problem, number theory		x1342
1812E	Not a Geometry Problem special problem, special problem, constructive algorithms, geometry, math		x4329
1812D	Trivial Conjecture *special problem, constructive algorithms, math, number theory		x4964
1812C	Digits *special problem		x1381
1812B	Was it Rated? special problem, special problem, *special problem, brute force, implementation		x6099
1812A	Are You a Robot? special problem, special problem, *special problem, expression parsing, strings		x14406
1811G2	Vlad and the Nice Paths (hard version) binary search, combinatorics, data structures, dp, math, two pointers	2200	x2248
1811G1	Vlad and the Nice Paths (easy version) combinatorics, dp, math	2100	x2647
1811F	Is It Flower? dfs and similar, graphs, implementation	2100	x2359
1811E	Living Sequence binary search, dp, math, number theory	1500	x14909
1811D	Umka and a Long Flight constructive algorithms, implementation, math	1600	x8860
1811C	Restore the Array constructive algorithms, greedy	1100	x22673
1811B	Conveyor Belts implementation, math	1000	x22690
1811A	Insert Digit greedy, math, strings	800	x35250
1810H	Last Number combinatorics, math	2900	x177
1810G	The Maximum Prefix dp	3200	x1397
1810F	M-tree data structures, math, sortings, trees	2800	x712
1810E	Monsters brute force, data structures, dfs and similar, dsu, graphs, greedy	2100	x4089
1810D	Climbing the Tree binary search, math	1700	x8715
1810C	Make It Permutation brute force, greedy, sortings	1300	x16868
1810B	Candies constructive algorithms, math, number theory	800	x19093
1810A	Beautiful Sequence brute force, greedy	800	x22111
1809G	Prediction combinatorics, dp, math	2800	x690

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