Problemset - Codeforces

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Codeforces Round (Div. 2)
6 days

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Problems

#	Name
1805A	We Need the Zero bitmasks, brute force	800	x21880
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	x4488
1804C	Pull Your Luck brute force, greedy, math, number theory	1500	x11741
1804B	Vaccination greedy, implementation	1000	x13946
1804A	Lame King greedy, math	800	x17773
1802B	Settlement of Guinea Pigs greedy, implementation, math	1000	x13056
1802A	Likes greedy, implementation	800	x15605
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	x3301
1801B	Buying gifts data structures, greedy, sortings	1800	x5972
1801A	The Very Beautiful Blanket bitmasks, constructive algorithms	1600	x8283
1800G	Symmetree dfs and similar, hashing, implementation, trees	2200	x1973
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	x12319
1800E1	Unforgivable Curse (easy version) brute force, constructive algorithms, dsu, graphs, greedy, strings	1400	x12374
1800D	Remove Two Letters data structures, greedy, hashing, strings	1200	x22232
1800C2	Powering the Hero (hard version) data structures, greedy	1100	x21754
1800C1	Powering the Hero (easy version) data structures, greedy	1000	x22757
1800B	Count the Number of Pairs greedy, strings	1000	x24356
1800A	Is It a Cat? implementation, strings	800	x30469
1799H	Tree Cutting bitmasks, dfs and similar, dp	3200	x275
1799G	Count Voting combinatorics, dp, math	2600	x716
1799F	Halve or Subtract binary search, brute force, dp, greedy, sortings	2700	x780
1799E	City Union constructive algorithms, dfs and similar, dsu, geometry, greedy, implementation, math	2300	x1171
1799D2	Hot Start Up (hard version) data structures, dp	2100	x2328
1799D1	Hot Start Up (easy version) dp	1900	x4226
1799C	Double Lexicographically Minimum greedy, strings	1700	x5623
1799B	Equalize by Divide brute force, constructive algorithms, greedy, math	1200	x10995
1799A	Recent Actions data structures, greedy, implementation, math	800	x11439
1798F	Gifts from Grandfather Ahmed dp, math, number theory	2500	x474
1798E	Multitest Generator brute force, dp	2300	x1542
1798D	Shocking Arrangement constructive algorithms, greedy, math	1600	x9386
1798C	Candy Store greedy, math, number theory	1700	x7937
1798B	Three Sevens brute force, data structures, greedy, implementation	1000	x16167
1798A	Showstopper greedy, implementation, sortings	800	x19473
1797F	Li Hua and Path data structures, dfs and similar, divide and conquer, dsu, trees	3000	x337
1797E	Li Hua and Array brute force, data structures, dsu, math, number theory, two pointers	2300	x1217
1797D	Li Hua and Tree brute force, data structures, dfs and similar, dp, implementation, trees	1900	x3776
1797C	Li Hua and Chess constructive algorithms, greedy, interactive	1600	x7385
1797B	Li Hua and Pattern constructive algorithms, greedy	1100	x15090
1797A	Li Hua and Maze constructive algorithms, flows, graphs, greedy, implementation	800	x17115
1796F	Strange Triples brute force, math, number theory	2900	x170
1796E	Colored Subgraphs dfs and similar, dp, games, greedy, trees	2500	x718
1796D	Maximum Subarray data structures, dp, greedy, two pointers	2000	x4077
1796C	Maximum Set binary search, math	1600	x10029
1796B	Asterisk-Minor Template implementation, strings	1000	x16204
1796A	Typical Interview Problem brute force, implementation, strings	800	x18656
1795G	Removal Sequences bitmasks, dfs and similar, graphs	2700	x660
1795F	Blocking Chips binary search, constructive algorithms, dfs and similar, greedy, trees	2400	x1077
1795E	Explosions? binary search, data structures, dp, greedy, math	2200	x1952
1795D	Triangle Coloring combinatorics, math	1600	x8743
1795C	Tea Tasting binary search, data structures, implementation	1500	x11820
1795B	Ideal Point brute force, geometry, greedy	900	x21518
1795A	Two Towers brute force, implementation, strings	800	x23399
1794E	Labeling the Tree with Distances data structures, dp, greedy, hashing, implementation, trees	2400	x1033
1794D	Counting Factorizations combinatorics, divide and conquer, dp, math, number theory	1900	x3436
1794C	Scoring Subsequences binary search, greedy, math, two pointers	1300	x12920
1794B	Not Dividing constructive algorithms, greedy, math	900	x20545
1794A	Prefix and Suffix Array strings	800	x16828
1793F	Rebrending brute force, data structures, divide and conquer, implementation	2600	x1321
1793E	Velepin and Marketing binary search, data structures, dp, greedy, sortings, two pointers	2600	x950
1793D	Moscow Gorillas binary search, dp, greedy, implementation, math, two pointers	1800	x5901
1793C	Dora and Search constructive algorithms, data structures, two pointers	1200	x18861
1793B	Fedya and Array constructive algorithms, math	1100	x15469
1793A	Yet Another Promotion greedy, math	800	x17826
1792F2	Graph Coloring (hard version) brute force, combinatorics, divide and conquer, dp, fft, graphs	2900	x375
1792F1	Graph Coloring (easy version) combinatorics, dp, graphs	2700	x681
1792E	Divisors and Table brute force, dfs and similar, dp, number theory	2400	x1330
1792D	Fixed Prefix Permutations binary search, bitmasks, data structures, hashing, math, sortings	1700	x6011
1792C	Min Max Sort binary search, brute force, greedy, math, two pointers	1500	x13605
1792B	Stand-up Comedian greedy, math	1200	x20620
1792A	GamingForces greedy, sortings	800	x27565
1791G2	Teleporters (Hard Version) binary search, greedy, sortings	1900	x4592
1791G1	Teleporters (Easy Version) greedy, sortings	1100	x21311
1791F	Range Update Point Query binary search, brute force, data structures	1500	x11828
1791E	Negatives and Positives dp, greedy, sortings	1100	x26530
1791D	Distinct Split brute force, greedy, strings	1000	x28071
1791C	Prepend and Append implementation, two pointers	800	x42127
1791B	Following Directions geometry, implementation	800	x42723
1791A	Codeforces Checking implementation, strings	800	x57067
1790G	Tokens on Graph constructive algorithms, dfs and similar, graphs, shortest paths	2300	x1084
1790F	Timofey and Black-White Tree brute force, dfs and similar, divide and conquer, graphs, greedy, math, shortest paths, trees	2100	x3203
1790E	Vlad and a Pair of Numbers bitmasks, constructive algorithms	1400	x14547
1790D	Matryoshkas data structures, greedy, sortings	1200	x18855
1790C	Premutation brute force, implementation, math	1000	x23306
1790B	Taisia and Dice greedy, greedy, math	800	x26931
1790A	Polycarp and the Day of Pi implementation, math, strings	800	x36171
1789F	Serval and Brain Power bitmasks, brute force, dp, greedy, implementation, strings	2700	x527
1789E	Serval and Music Game brute force, dp, implementation, math, number theory	2500	x778
1789D	Serval and Shift-Shift-Shift bitmasks, brute force, constructive algorithms, implementation	2200	x1607
1789C	Serval and Toxel's Arrays combinatorics, dp, implementation, math	1500	x8248
1789B	Serval and Inversion Magic brute force, implementation, strings, two pointers	800	x15935
1789A	Serval and Mocha's Array brute force, math, number theory	800	x17654