Problemset - Codeforces

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Educational Codeforces Round 166 (Rated for Div. 2)
39:29:19
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Problems

#	Name
1845D	Rating System binary search, brute force, data structures, dp, dsu, greedy, math, two pointers	1800	x7383
1845C	Strong Password binary search, dp, greedy, strings	1400	x13441
1844H	Multiple of Three Cycles combinatorics, data structures, dp, dsu, math	3400	x132
1844C	Particles dp, greedy, implementation, math	1300	x14968
1843F2	Omsk Metro (hard version) data structures, dfs and similar, divide and conquer, dp, math, trees	2300	x1487
1843F1	Omsk Metro (simple version) data structures, dfs and similar, dp, graphs, greedy, math, trees	1800	x5023
1843D	Apple Tree combinatorics, dfs and similar, dp, math, trees	1200	x17147
1842I	Tenzing and Necklace divide and conquer, dp, greedy	3500	x108
1842H	Tenzing and Random Real Numbers bitmasks, dp, graphs, math, probabilities	3000	x565
1842G	Tenzing and Random Operations combinatorics, dp, math, probabilities	2800	x931
1842E	Tenzing and Triangle data structures, dp, geometry, greedy, math	2300	x1547
1842C	Tenzing and Balls dp	1500	x11834
1841C	Ranom Numbers brute force, dp, greedy, math, strings	1800	x7358
1840F	Railguns brute force, dfs and similar, dp, graphs	2200	x1717
1839E	Decreasing Game constructive algorithms, dfs and similar, dp, greedy, interactive	2400	x1165
1839D	Ball Sorting data structures, dp, sortings	2100	x2192
1838E	Count Supersequences combinatorics, dp, math	2500	x1380
1835E	Old Mobile combinatorics, dp, probabilities	3500	x203
1833G	Ksyusha and Chinchilla constructive algorithms, dfs and similar, dp, dsu, greedy, implementation, trees	1800	x4981
1832F	Zombies binary search, dp	3200	x253
1832E	Combinatorics Problem brute force, combinatorics, dp	2200	x2068
1830F	The Third Grace data structures, dp	3200	x225
1830D	Mex Tree brute force, dp, trees	2800	x607
1830A	Copil Copac Draws Trees dfs and similar, dp, graphs, trees	1400	x12567
1829H	Don't Blame Me bitmasks, combinatorics, dp, math	1700	x7155
1829G	Hits Different data structures, dp, implementation, math	1600	x9527
1829D	Gold Rush brute force, dfs and similar, dp, implementation	1000	x24442
1827C	Palindrome Partition binary search, brute force, data structures, dp, hashing, strings	2600	x1154
1827B2	Range Sorting (Hard Version) binary search, data structures, dp, greedy	2400	x1781
1827B1	Range Sorting (Easy Version) binary search, dp, dsu, greedy, trees, two pointers	2000	x3689
1826E	Walk the Runway bitmasks, brute force, data structures, dp, graphs, implementation, sortings	2400	x1515
1826D	Running Miles brute force, dp, greedy	1700	x8714
1824C	LuoTianyi and XOR-Tree data structures, dfs and similar, dp, dsu, greedy, trees	2500	x1264
1823F	Random Walk dp, graphs, math, probabilities, trees	2600	x797
1823E	Removing Graph brute force, dp, games, graphs, math	2500	x1201
1822F	Gardening Friends brute force, dfs and similar, dp, graphs, trees	1700	x5650
1821F	Timber combinatorics, dp, fft, math	2600	x713
1821E	Rearrange Brackets brute force, dp, greedy, sortings, strings	2100	x2267
1819F	Willy-nilly, Crack, Into Release! data structures, dp	3500	x127
1819D	Misha and Apples brute force, data structures, dp, two pointers	2800	x599
1819C	The Fox and the Complete Tree Traversal constructive algorithms, dp, implementation, math, trees	2400	x1405
1815E	Bosco and Particle dp, math, number theory, strings	3100	x329
1815D	XOR Counting bitmasks, combinatorics, dp, math	2600	x1059
1814E	Chain Chips data structures, dp, matrices	2300	x1260
1811G2	Vlad and the Nice Paths (hard version) binary search, combinatorics, data structures, dp, math, two pointers	2200	x1636
1811G1	Vlad and the Nice Paths (easy version) combinatorics, dp, math	2100	x1930
1811E	Living Sequence binary search, dp, math, number theory	1500	x11656
1810G	The Maximum Prefix dp	3200	x641
1809G	Prediction combinatorics, dp, math	2800	x421
1809E	Two Tanks binary search, dp, implementation, math	2400	x796
1808E3	Minibuses on Venus (hard version) brute force, combinatorics, dp, math	2800	x422
1808E2	Minibuses on Venus (medium version) combinatorics, divide and conquer, dp, matrices	2500	x654
1808E1	Minibuses on Venus (easy version) combinatorics, divide and conquer, dp	2200	x1257
1808C	Unlucky Numbers brute force, dp, greedy, implementation	1900	x3603
1807G2	Subsequence Addition (Hard Version) bitmasks, dp, greedy, implementation, sortings	1100	x17861
1807G1	Subsequence Addition (Easy Version) brute force, data structures, dp, greedy, implementation, sortings	1100	x17960
1806D	DSU Master combinatorics, dp, dsu, math	2500	x855
1805E	There Should Be a Lot of Maximums brute force, data structures, dfs and similar, dp, trees, two pointers	2300	x1534
1805D	A Wide, Wide Graph dfs and similar, dp, graphs, greedy, trees	1800	x6093
1804H	Code Lock bitmasks, dp	3300	x169
1804E	Routing bitmasks, brute force, dfs and similar, dp, graphs	2400	x1372
1804D	Accommodation brute force, dp, greedy, implementation	2000	x4443
1801F	Another n-dimensional chocolate bar dp, math, meet-in-the-middle, number theory	2700	x549
1801D	The way home binary search, data structures, dp, graphs, greedy, shortest paths, sortings	2100	x2070
1801C	Music Festival binary search, data structures, dp, greedy, sortings	1900	x3248
1799H	Tree Cutting bitmasks, dfs and similar, dp	3200	x272
1799G	Count Voting combinatorics, dp, math	2600	x709
1799F	Halve or Subtract binary search, brute force, dp, greedy, sortings	2700	x778
1799D2	Hot Start Up (hard version) data structures, dp	2100	x2299
1799D1	Hot Start Up (easy version) dp	1900	x4132
1798F	Gifts from Grandfather Ahmed dp, math, number theory	2500	x468
1798E	Multitest Generator brute force, dp	2300	x1534
1797D	Li Hua and Tree brute force, data structures, dfs and similar, dp, implementation, trees	1900	x3724
1796E	Colored Subgraphs dfs and similar, dp, games, greedy, trees	2500	x703
1796D	Maximum Subarray data structures, dp, greedy, two pointers	2000	x3920
1795E	Explosions? binary search, data structures, dp, greedy, math	2200	x1940
1794E	Labeling the Tree with Distances data structures, dp, greedy, hashing, implementation, trees	2400	x1020
1794D	Counting Factorizations combinatorics, divide and conquer, dp, math, number theory	1900	x3380
1793E	Velepin and Marketing binary search, data structures, dp, greedy, sortings, two pointers	2600	x937
1793D	Moscow Gorillas binary search, dp, greedy, implementation, math, two pointers	1800	x5812
1792F2	Graph Coloring (hard version) brute force, combinatorics, divide and conquer, dp, fft, graphs	2900	x374
1792F1	Graph Coloring (easy version) combinatorics, dp, graphs	2700	x676
1792E	Divisors and Table brute force, dfs and similar, dp, number theory	2400	x1316
1791E	Negatives and Positives dp, greedy, sortings	1100	x25881
1789F	Serval and Brain Power bitmasks, brute force, dp, greedy, implementation, strings	2700	x522
1789E	Serval and Music Game brute force, dp, implementation, math, number theory	2500	x772
1789C	Serval and Toxel's Arrays combinatorics, dp, implementation, math	1500	x8142
1788E	Sum Over Zero data structures, dfs and similar, dp	2200	x2497
1787H	Codeforces Scoreboard binary search, data structures, dp, geometry	3300	x202
1787C	Remove the Bracket dp, greedy, math	1600	x6759
1784E	Infinite Game brute force, combinatorics, dp, games, probabilities	3100	x303
1784D	Wooden Spoon combinatorics, dp	2400	x958
1783D	Different Arrays brute force, dp, implementation	2000	x4218
1781F	Bracket Insertion combinatorics, dp, math, trees	2700	x741
1780F	Three Chairs bitmasks, brute force, combinatorics, data structures, dp, number theory, sortings	2300	x1391
1779F	Xorcerer's Stones bitmasks, constructive algorithms, dp, trees	2500	x1225
1779D	Boris and His Amazing Haircut constructive algorithms, data structures, dp, dsu, greedy, sortings	1700	x7558
1778F	Maximizing Root dfs and similar, dp, graphs, math, number theory, trees	2600	x601
1778D	Flexible String Revisit combinatorics, dp, math, probabilities	2100	x2576
1777D	Score of a Tree bitmasks, combinatorics, dfs and similar, dp, math, probabilities, trees	1900	x3243