Problemset - Codeforces

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Educational Codeforces Round 150 (Rated for Div. 2)
4 days

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Difficulty: —

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Problems

#	Name
1840F	Railguns brute force, dp, shortest paths		x630
1839E	Decreasing Game constructive algorithms, dfs and similar, dp, greedy, interactive		x583
1839D	Ball Sorting data structures, dp, sortings		x1123
1838E	Count Supersequences combinatorics, dp, math		x632
1833G	Ksyusha and Chinchilla constructive algorithms, dfs and similar, dp, dsu, greedy, implementation, trees	1800	x3004
1832F	Zombies binary search, dp	3200	x170
1832E	Combinatorics Problem brute force, combinatorics, dp	2200	x1523
1830F	The Third Grace data structures, dp	3200	x54
1830D	Mex Tree brute force, dp, trees	2800	x302
1830A	Copil Copac Draws Trees dfs and similar, dp, graphs, trees	1400	x8305
1829H	Don't Blame Me bitmasks, combinatorics, dp, math	1700	x4159
1829G	Hits Different data structures, dp, implementation, math	1600	x5753
1829D	Gold Rush brute force, dfs and similar, dp, implementation	1000	x16437
1827C	Palindrome Partition binary search, brute force, data structures, dp, hashing, strings	2600	x695
1827B2	Range Sorting (Hard Version) binary search, data structures, dp, greedy	2400	x1186
1827B1	Range Sorting (Easy Version) binary search, dp, dsu, greedy, trees, two pointers	2000	x2663
1826E	Walk the Runway bitmasks, brute force, data structures, dp, graphs, implementation, sortings	2400	x1083
1826D	Running Miles brute force, dp, greedy	1700	x5032
1824C	LuoTianyi and XOR-Tree data structures, dfs and similar, dp, dsu, greedy, trees	2500	x830
1823F	Random Walk dp, graphs, math, probabilities, trees	2600	x471
1823E	Removing Graph brute force, dp, games, graphs, math	2500	x920
1822F	Gardening Friends brute force, dfs and similar, dp, graphs, trees	1700	x3539
1821F	Timber combinatorics, dp, fft, math	2600	x505
1821E	Rearrange Brackets brute force, dp, greedy, sortings, strings	2100	x1601
1819F	Willy-nilly, Crack, Into Release! data structures, dp	3500	x89
1819D	Misha and Apples brute force, data structures, dp, two pointers	2800	x448
1819C	The Fox and the Complete Tree Traversal constructive algorithms, dp, implementation, math, trees	2400	x1049
1815E	Bosco and Particle dp, math, number theory, strings	3100	x178
1815D	XOR Counting bitmasks, combinatorics, dp, math	2600	x720
1814E	Chain Chips data structures, dp, matrices	2300	x907
1811G2	Vlad and the Nice Paths (hard version) binary search, combinatorics, data structures, dp, math, two pointers	2200	x1122
1811G1	Vlad and the Nice Paths (easy version) combinatorics, dp, math	2100	x1350
1811E	Living Sequence binary search, dp, math, number theory	1500	x8377
1810G	The Maximum Prefix dp	3200	x232
1809G	Prediction combinatorics, dp, math	2800	x266
1809E	Two Tanks binary search, dp, implementation, math	2400	x610
1808E3	Minibuses on Venus (hard version) brute force, combinatorics, dp, math	2800	x276
1808E2	Minibuses on Venus (medium version) combinatorics, divide and conquer, dp, matrices	2500	x445
1808E1	Minibuses on Venus (easy version) combinatorics, divide and conquer, dp	2200	x896
1808C	Unlucky Numbers brute force, dp, greedy, implementation	1900	x2752
1807G2	Subsequence Addition (Hard Version) bitmasks, dp, greedy, implementation, sortings	1100	x13990
1807G1	Subsequence Addition (Easy Version) brute force, data structures, dp, greedy, implementation, sortings	1100	x14491
1806D	DSU Master combinatorics, dp, dsu, math	2500	x640
1805E	There Should Be a Lot of Maximums brute force, data structures, dfs and similar, dp, trees, two pointers	2300	x1151
1805D	A Wide, Wide Graph dfs and similar, dp, graphs, greedy, trees	1800	x4453
1804H	Code Lock bitmasks, dp	3300	x119
1804E	Routing bitmasks, brute force, dfs and similar, dp, graphs	2400	x1135
1804D	Accommodation brute force, dp, greedy, implementation	2000	x3723
1801F	Another n-dimensional chocolate bar dp, math, meet-in-the-middle, number theory	2700	x400
1801D	The way home binary search, data structures, dp, graphs, greedy, shortest paths, sortings	2100	x1412
1801C	Music Festival binary search, data structures, dp, greedy, sortings	1900	x2352
1799H	Tree Cutting bitmasks, dfs and similar, dp	3200	x174
1799G	Count Voting combinatorics, dp, math	2600	x502
1799F	Halve or Subtract binary search, brute force, dp, greedy, sortings	2700	x592
1799D2	Hot Start Up (hard version) data structures, dp	2100	x1775
1799D1	Hot Start Up (easy version) dp	1900	x3066
1798F	Gifts from Grandfather Ahmed dp, math, number theory	2500	x344
1798E	Multitest Generator brute force, dp	2300	x1203
1797D	Li Hua and Tree brute force, data structures, dfs and similar, dp, implementation, trees	1900	x2708
1796E	Colored Subgraphs dfs and similar, dp, games, greedy, trees	2500	x508
1796D	Maximum Subarray data structures, dp, greedy, two pointers	2000	x2878
1795E	Explosions? binary search, data structures, dp, greedy, math	2200	x1584
1794E	Labeling the Tree with Distances data structures, dp, greedy, hashing, implementation, trees	2400	x754
1794D	Counting Factorizations combinatorics, divide and conquer, dp, math, number theory	1900	x2692
1793E	Velepin and Marketing binary search, data structures, dp, greedy, sortings, two pointers	2600	x722
1793D	Moscow Gorillas binary search, dp, greedy, implementation, math, two pointers	1800	x4661
1792F2	Graph Coloring (hard version) brute force, combinatorics, divide and conquer, dp, fft, graphs	2900	x298
1792F1	Graph Coloring (easy version) combinatorics, dp, graphs	2700	x510
1792E	Divisors and Table brute force, dfs and similar, dp, number theory	2400	x1059
1791E	Negatives and Positives dp, greedy, sortings	1100	x19992
1789F	Serval and Brain Power bitmasks, brute force, dp, greedy, implementation, strings	2700	x360
1789E	Serval and Music Game brute force, dp, implementation, math, number theory	2500	x631
1789C	Serval and Toxel's Arrays combinatorics, dp, implementation, math	1500	x6501
1788E	Sum Over Zero data structures, dfs and similar, dp	2200	x1960
1787H	Codeforces Scoreboard binary search, data structures, dp, geometry	3300	x148
1787C	Remove the Bracket dp, greedy, math	1600	x5504
1784E	Infinite Game brute force, combinatorics, dp, games, probabilities	3100	x208
1784D	Wooden Spoon combinatorics, dp	2400	x736
1783D	Different Arrays brute force, dp, implementation	2000	x3472
1781F	Bracket Insertion combinatorics, dp, math, trees	2700	x585
1780F	Three Chairs bitmasks, brute force, combinatorics, data structures, dp, number theory, sortings	2300	x1085
1779F	Xorcerer's Stones bitmasks, constructive algorithms, dp, trees	2500	x1063
1779D	Boris and His Amazing Haircut constructive algorithms, data structures, dp, dsu, greedy, sortings	1700	x6224
1778F	Maximizing Root dfs and similar, dp, graphs, math, number theory, trees	2600	x430
1778D	Flexible String Revisit combinatorics, dp, math, probabilities	2100	x2077
1777D	Score of a Tree bitmasks, combinatorics, dfs and similar, dp, math, probabilities, trees	1900	x2519
1776M	Parmigiana With Seafood binary search, dp, greedy, trees	3000	x222
1776K	Uniform Chemistry dp, math	3200	x46
1776E	Crossing the Railways data structures, dp	3500	x28
1776B	Vittorio Plays with LEGO Bricks dp, geometry	2200	x978
1775F	Laboratory on Pluto constructive algorithms, dp, greedy, math	2500	x628
1774G	Segment Covering brute force, combinatorics, constructive algorithms, data structures, dp, trees	3200	x235
1774E	Two Chess Pieces dfs and similar, dp, greedy, trees	1900	x2793
1774C	Ice and Fire constructive algorithms, dp, greedy	1300	x10031
1773L	Lisa's Sequences dp	3500	x20
1773G	Game of Questions bitmasks, combinatorics, dp, fft, math, probabilities	2800	x215
1771E	Hossam and a Letter brute force, dp, implementation, two pointers	2500	x565
1771D	Hossam and (sub-)palindromic tree brute force, data structures, dfs and similar, dp, strings, trees	2100	x2135
1771B	Hossam and Friends binary search, constructive algorithms, dp, two pointers	1400	x10115
1770F	Koxia and Sequence bitmasks, combinatorics, dp, math, number theory	3100	x411

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