Problemset - Codeforces

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Codeforces Round (Div. 2)
6 days

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Problems

#	Name
1830E	Bully Sort data structures, math	3500	x234
1830D	Mex Tree brute force, dp, trees	2800	x618
1830C	Hyperregular Bracket Strings combinatorics, greedy, hashing, math, number theory, sortings	2400	x1568
1830B	The BOSS Can Count Pairs brute force, math	2000	x4700
1830A	Copil Copac Draws Trees dfs and similar, dp, graphs, trees	1400	x12824
1829H	Don't Blame Me bitmasks, combinatorics, dp, math	1700	x7328
1829G	Hits Different data structures, dp, implementation, math	1600	x9757
1827F	Copium Permutation constructive algorithms, data structures, greedy	3500	x111
1827E	Bus Routes binary search, constructive algorithms, dfs and similar, greedy, trees	3400	x370
1827D	Two Centroids data structures, dfs and similar, greedy, trees	2800	x716
1827C	Palindrome Partition binary search, brute force, data structures, dp, hashing, strings	2600	x1162
1827B2	Range Sorting (Hard Version) binary search, data structures, dp, greedy	2400	x1797
1827B1	Range Sorting (Easy Version) binary search, dp, dsu, greedy, trees, two pointers	2000	x3734
1826F	Fading into Fog geometry, interactive, math, probabilities	2800	x343
1826E	Walk the Runway bitmasks, brute force, data structures, dp, graphs, implementation, sortings	2400	x1531
1826D	Running Miles brute force, dp, greedy	1700	x8956
1824E	LuoTianyi and Cartridge data structures, trees	3500	x127
1824D	LuoTianyi and the Function data structures	3000	x468
1824C	LuoTianyi and XOR-Tree data structures, dfs and similar, dp, dsu, greedy, trees	2500	x1275
1824B2	LuoTianyi and the Floating Islands (Hard Version) combinatorics, dfs and similar, math, probabilities, trees	2300	x2523
1824B1	LuoTianyi and the Floating Islands (Easy Version) combinatorics, math, probabilities, trees	1800	x4403
1824A	LuoTianyi and the Show greedy, implementation	1400	x10989
1823F	Random Walk dp, graphs, math, probabilities, trees	2600	x816
1823E	Removing Graph brute force, dp, games, graphs, math	2500	x1206
1823D	Unique Palindromes constructive algorithms, math, strings	1900	x3724
1822G2	Magic Triples (Hard Version) brute force, data structures, math, number theory	2200	x2356
1822G1	Magic Triples (Easy Version) brute force, data structures, math, number theory	1700	x6739
1822F	Gardening Friends brute force, dfs and similar, dp, graphs, trees	1700	x5761
1822E	Making Anti-Palindromes greedy, math, strings	1600	x9988
1821F	Timber combinatorics, dp, fft, math	2600	x723
1821E	Rearrange Brackets brute force, dp, greedy, sortings, strings	2100	x2294
1821D	Black Cells binary search, brute force, greedy, math	1900	x4833
1819F	Willy-nilly, Crack, Into Release! data structures, dp	3500	x129
1819E	Roads in E City interactive, math, probabilities, trees	3200	x273
1819D	Misha and Apples brute force, data structures, dp, two pointers	2800	x607
1819C	The Fox and the Complete Tree Traversal constructive algorithms, dp, implementation, math, trees	2400	x1417
1819B	The Butcher geometry, greedy, implementation, sortings, two pointers	1900	x3480
1817F	Entangled Substrings string suffix structures, strings	3500	x186
1817E	Half-sum brute force, divide and conquer, greedy	3400	x256
1817D	Toy Machine constructive algorithms, games, implementation	2700	x686
1817C	Similar Polynomials combinatorics, math	2400	x940
1817B	Fish Graph brute force, constructive algorithms, dfs and similar, graphs	1900	x3940
1817A	Almost Increasing Subsequence binary search, data structures, greedy	1500	x10615
1815F	OH NO1 (-2-3-4) constructive algorithms, graphs, math	3500	x218
1815E	Bosco and Particle dp, math, number theory, strings	3100	x332
1815D	XOR Counting bitmasks, combinatorics, dp, math	2600	x1075
1815C	Between constructive algorithms, dfs and similar, graphs, greedy	2200	x1910
1815B	Sum Graph brute force, constructive algorithms, graphs, implementation, interactive, shortest paths, trees	2000	x2928
1814F	Communication Towers brute force, divide and conquer, dsu	2700	x491
1814E	Chain Chips data structures, dp, matrices	2300	x1274
1814D	Balancing Weapons binary search, brute force, data structures, math, two pointers	2500	x833
1814C	Search in Parallel constructive algorithms, greedy, sortings	1500	x10435
1814B	Long Legs brute force, math	1700	x9713
1811G2	Vlad and the Nice Paths (hard version) binary search, combinatorics, data structures, dp, math, two pointers	2200	x1682
1811G1	Vlad and the Nice Paths (easy version) combinatorics, dp, math	2100	x1982
1811F	Is It Flower? dfs and similar, graphs, implementation	2100	x1765
1811E	Living Sequence binary search, dp, math, number theory	1500	x11822
1811D	Umka and a Long Flight constructive algorithms, implementation, math	1600	x7202
1810H	Last Number combinatorics, math	2900	x133
1810G	The Maximum Prefix dp	3200	x651
1810F	M-tree data structures, math, sortings, trees	2800	x552
1810E	Monsters brute force, data structures, dfs and similar, dsu, graphs, greedy	2100	x3064
1810D	Climbing the Tree binary search, math	1700	x7234
1809G	Prediction combinatorics, dp, math	2800	x429
1809F	Traveling in Berland binary search, data structures, graphs, greedy, implementation	2500	x726
1809E	Two Tanks binary search, dp, implementation, math	2400	x805
1809D	Binary String Sorting constructive algorithms, greedy	1800	x6072
1809C	Sum on Subarrays constructive algorithms, greedy, math	1500	x12215
1808E3	Minibuses on Venus (hard version) brute force, combinatorics, dp, math	2800	x426
1808E2	Minibuses on Venus (medium version) combinatorics, divide and conquer, dp, matrices	2500	x660
1808E1	Minibuses on Venus (easy version) combinatorics, divide and conquer, dp	2200	x1273
1808D	Petya, Petya, Petr, and Palindromes binary search, brute force, data structures, two pointers	2100	x2226
1808C	Unlucky Numbers brute force, dp, greedy, implementation	1900	x3655
1807F	Bouncy Ball brute force, dfs and similar, implementation	1700	x6020
1806F2	GCD Master (hard version) greedy, math, sortings	2900	x281
1806F1	GCD Master (easy version) greedy, math, number theory, sortings	2900	x342
1806E	Tree Master brute force, data structures, dfs and similar, trees	2200	x2731
1806D	DSU Master combinatorics, dp, dsu, math	2500	x865
1806C	Sequence Master brute force, constructive algorithms, math	1600	x7361
1805F2	Survival of the Weakest (hard version) greedy, math, sortings, two pointers	3100	x334
1805F1	Survival of the Weakest (easy version) binary search, brute force, implementation, math, sortings	2600	x849
1805E	There Should Be a Lot of Maximums brute force, data structures, dfs and similar, dp, trees, two pointers	2300	x1550
1805D	A Wide, Wide Graph dfs and similar, dp, graphs, greedy, trees	1800	x6245
1805C	Place for a Selfie binary search, data structures, geometry, math	1400	x12208
1804H	Code Lock bitmasks, dp	3300	x171
1804G	Flow Control data structures, dsu, implementation	3500	x194
1804F	Approximate Diameter binary search, divide and conquer, graphs, shortest paths	2700	x862
1804E	Routing bitmasks, brute force, dfs and similar, dp, graphs	2400	x1381
1804D	Accommodation brute force, dp, greedy, implementation	2000	x4487
1804C	Pull Your Luck brute force, greedy, math, number theory	1500	x11739
1801G	A task for substrings data structures, string suffix structures, strings	3400	x356
1801F	Another n-dimensional chocolate bar dp, math, meet-in-the-middle, number theory	2700	x554
1801E	Gasoline prices data structures, divide and conquer, dsu, hashing, trees	3000	x438
1801D	The way home binary search, data structures, dp, graphs, greedy, shortest paths, sortings	2100	x2096
1801C	Music Festival binary search, data structures, dp, greedy, sortings	1900	x3299
1801B	Buying gifts data structures, greedy, sortings	1800	x5970
1801A	The Very Beautiful Blanket bitmasks, constructive algorithms	1600	x8282
1800G	Symmetree dfs and similar, hashing, implementation, trees	2200	x1972
1800F	Dasha and Nightmares bitmasks, hashing, meet-in-the-middle, strings	1900	x3767
1800E2	Unforgivable Curse (hard version) brute force, constructive algorithms, dfs and similar, dsu, graphs, greedy, strings	1500	x12318