trees - Problem Set - HFOJ

	ID	Problem Show tags Hide tags	AC / Tried	Difficulty
	1158	P1676G White-Black Balanced Subtrees dfs and similar dp graphs trees *1300	0 / 0	4
	1135	P1680F Lenient Vertex Cover dfs and similar divide and conquer dsu graphs trees *2600	0 / 0	10
	1129	P1681F Unique Occurrences data structures dfs and similar divide and conquer dp dsu trees *2300	0 / 0	8
	1125	P1682D Circular Spanning Tree constructive algorithms implementation trees *2000	0 / 0	7
	1124	P1682E Unordered Swaps constructive algorithms dfs and similar graphs greedy math sortings trees *2700	0 / 0	10
	1074	P1689C Infected Tree dfs and similar dp trees *1600	0 / 0	5
	1056	P1691F K-Set Tree combinatorics dfs and similar dp math trees *2500	0 / 0	9
	1046	P1693B Fake Plastic Trees dfs and similar dp greedy trees *1700	0 / 0	5
	1032	P1695D1 Tree Queries (Easy Version) brute force constructive algorithms dfs and similar dp greedy trees *2200	0 / 0	8
	1030	P1695D2 Tree Queries (Hard Version) constructive algorithms dfs and similar dp greedy trees *2300	0 / 0	8
	1019	P1696F Tree Recovery brute force constructive algorithms dfs and similar dsu graphs trees *2600	0 / 0	10
	993	P1698E PermutationForces II brute force combinatorics greedy sortings trees two pointers *2300	0 / 0	8
	963	P1702G1 Passable Paths (easy version) dfs and similar trees *1900	0 / 0	6
	962	P1702G2 Passable Paths (hard version) data structures dfs and similar trees *2000	0 / 0	7
	934	P1706E Qpwoeirut and Vertices binary search data structures dfs and similar divide and conquer dsu greedy trees *2300	0 / 0	8
	931	P1707C DFS Trees dfs and similar dsu graphs greedy sortings trees *2400	0 / 0	9
	930	P1707D Partial Virtual Trees combinatorics dfs and similar dp math trees *3000	0 / 0	10
	921	P1709E XOR Tree bitmasks data structures dfs and similar dsu greedy trees *2400	0 / 0	9
	920	P1709F Multiset of Strings bitmasks brute force dp fft flows graphs math meet-in-the-middle trees *2500	0 / 0	9
	916	P1710D Recover the Tree constructive algorithms trees *3400	0 / 0	10
	906	P1712F Triameter binary search data structures dfs and similar trees *3200	0 / 0	10
	894	P1714F Build a Tree and That Is It constructive algorithms implementation trees *1900	0 / 0	6
	893	P1714G Path Prefixes binary search data structures dfs and similar trees *1700	0 / 0	5
	870	P1718D Permutation for Burenka data structures graph matchings greedy math trees *3300	0 / 0	10
	861	P1720D1 Xor-Subsequence (easy version) bitmasks brute force dp strings trees two pointers *1800	0 / 0	6
	860	P1720D2 Xor-Subsequence (hard version) bitmasks data structures dp strings trees *2400	0 / 0	9
	854	P1721E Prefix Function Queries dfs and similar dp hashing string suffix structures strings trees *2200	0 / 0	8
	841	P1725E Electrical Efficiency combinatorics data structures dp math number theory trees *2500	0 / 0	9
	837	P1725I Imitating the Key Tree combinatorics dsu trees *2800	0 / 0	10
	836	P1725J Journey dp trees *2500	0 / 0	9
	829	P1726D Edge Split brute force constructive algorithms dfs and similar dsu graphs probabilities trees *2000	0 / 0	7
	755	P1738D Permutation Addicts constructive algorithms data structures dfs and similar dsu graphs trees *1900	0 / 0	6
	752	P1738F Connectivity Addicts constructive algorithms dsu graphs greedy interactive shortest paths trees *2400	0 / 0	9
	743	P1739D Reset K Edges binary search data structures dfs and similar graphs greedy trees *1900	0 / 0	6
	733	P1740E Hanging Hearts constructive algorithms data structures dfs and similar dp greedy trees *1800	0 / 0	6
	730	P1740H MEX Tree Manipulation data structures trees *3300	0 / 0	10
	725	P1741D Masha and a Beautiful Tree dfs and similar divide and conquer graphs sortings trees *1300	0 / 0	4
	673	P1746D Paths on the Tree dfs and similar dp greedy sortings trees *1900	0 / 0	6
	650	P1748E Yet Another Array Counting Problem binary search data structures divide and conquer dp flows math trees *2300	0 / 0	8
	637	P1749F Distance to the Path data structures dfs and similar trees *2800	0 / 0	10
	559	P1761E Make It Connected binary search brute force constructive algorithms dsu graphs greedy matrices trees two pointers *2400	0 / 0	9
	556	P1761G Centroid Guess interactive probabilities trees *3500	0 / 0	10
	551	P1762E Tree Sum combinatorics math trees *2600	0 / 0	10
	535	P1763F Edge Queries data structures dfs and similar dp dsu graphs trees *3000	0 / 0	10
	525	P1764F Doremy's Experimental Tree brute force constructive algorithms dfs and similar dsu sortings trees *2500	0 / 0	9
	475	P1767E Algebra Flash bitmasks brute force dp graphs math meet-in-the-middle trees *2500	0 / 0	9
	474	P1767F Two Subtrees data structures trees *3100	0 / 0	10
	456	P1770E Koxia and Tree combinatorics dfs and similar dp dsu math probabilities trees *2400	0 / 0	9
	441	P1771D Hossam and (sub-)palindromic tree brute force data structures dfs and similar dp strings trees *2100	0 / 0	7
	438	P1771F Hossam and Range Minimum Query binary search bitmasks data structures hashing probabilities strings trees *2500	0 / 0	9
	433	P1773B BinCoin binary search divide and conquer hashing implementation probabilities trees *2200	0 / 0	8
	413	P1774E Two Chess Pieces dfs and similar dp greedy trees *1900	0 / 0	6
	407	P1774G Segment Covering brute force combinatorics constructive algorithms data structures dp trees *3200	0 / 0	10
	378	P1776M Parmigiana With Seafood binary search dp greedy trees *3000	0 / 0	10
	370	P1777D Score of a Tree bitmasks combinatorics dfs and similar dp math probabilities trees *1900	0 / 0	6
	369	P1777E Edge Reverse binary search dfs and similar graphs trees *2200	0 / 0	8
	367	P1777F Comfortably Numb bitmasks data structures divide and conquer strings trees *2400	0 / 0	9
	360	P1778E The Tree Has Fallen! bitmasks dfs and similar math trees *2500	0 / 0	9
	358	P1778F Maximizing Root dfs and similar dp graphs math number theory trees *2600	0 / 0	10
	349	P1779F Xorcerer's Stones bitmasks constructive algorithms dp trees *2500	0 / 0	9
	328	P1781F Bracket Insertion combinatorics dp math trees *2700	0 / 0	10
	326	P1781G Diverse Coloring constructive algorithms trees *3200	0 / 0	10
	314	P1783G Weighed Tree Radius data structures divide and conquer implementation trees *2800	0 / 0	10
	295	P1787G Colorful Tree Again brute force data structures trees *3000	0 / 0	10
	283	P1788F XOR, Tree, and Queries bitmasks constructive algorithms dfs and similar dsu graphs greedy implementation trees *2500	0 / 0	9
	271	P1790F Timofey and Black-White Tree brute force dfs and similar divide and conquer graphs greedy math shortest paths trees *2100	0 / 0	7
	231	P1794E Labeling the Tree with Distances data structures dp greedy hashing implementation trees *2400	0 / 0	9
	222	P1795F Blocking Chips binary search constructive algorithms dfs and similar greedy trees *2400	0 / 0	9
	213	P1796E Colored Subgraphs dfs and similar dp games greedy trees *2500	0 / 0	9
	206	P1797D Li Hua and Tree brute force data structures dfs and similar dp implementation trees *1900	0 / 0	6
	203	P1797F Li Hua and Path data structures dfs and similar divide and conquer dsu trees *3000	0 / 0	10
	166	P1800G Symmetree dfs and similar hashing implementation trees *2200	0 / 0	8
	159	P1801E Gasoline prices data structures divide and conquer dsu hashing trees *3000	0 / 0	10
	138	P1805D A Wide, Wide Graph dfs and similar dp graphs greedy trees *1800	0 / 0	6
	137	P1805E There Should Be a Lot of Maximums brute force data structures dfs and similar dp trees two pointers *2300	0 / 0	8
	128	P1806E Tree Master brute force data structures dfs and similar trees *2200	0 / 0	8
	75	P1810F M-tree data structures math sortings trees *2800	0 / 0	10
	48	P1815B Sum Graph brute force constructive algorithms graphs implementation interactive shortest paths trees *2000	0 / 0	7
	33	P1819C The Fox and the Complete Tree Traversal constructive algorithms dp implementation math trees *2400	0 / 0	9
	31	P1819E Roads in E City interactive math probabilities trees *3200	0 / 0	10
	3	P1822F Gardening Friends brute force dfs and similar dp graphs implementation trees	0 / 0	(None)
	9793	P1824B1 LuoTianyi and the Floating Islands (Easy Version) combinatorics dp math probabilities trees	0 / 0	(None)
	9792	P1824B2 LuoTianyi and the Floating Islands (Hard Version) combinatorics dp math probabilities trees	0 / 0	(None)
	9791	P1824C LuoTianyi and XOR-Tree bitmasks data structures dfs and similar dp dsu greedy trees	0 / 0	(None)
	9789	P1824E LuoTianyi and Cartridge data structures trees	0 / 0	(None)
	9822	P1827B1 Range Sorting (Easy Version) binary search dp dsu greedy trees two pointers *2000	0 / 0	7
	9819	P1827D Two Centroids data structures dfs and similar greedy trees *2800	0 / 0	10
	9818	P1827E Bus Routes binary search constructive algorithms dfs and similar greedy trees *3400	0 / 0	10
	9847	P1830A Copil Copac Draws Trees dfs and similar dp graphs trees	0 / 0	(None)
	9844	P1830D Mex Tree brute force dp trees	0 / 0	(None)
	9833	P1833G Ksyusha and Chinchilla constructive algorithms dfs and similar dp dsu greedy implementation trees *1800	0 / 0	6
	9828	P1837E Playoff Fixing combinatorics trees	0 / 0	(None)
	9926	P1842F Tenzing and Tree dfs and similar greedy shortest paths sortings trees *2500	0 / 0	9
	9920	P1843C Sum in Binary Tree bitmasks combinatorics math trees *800	0 / 0	3
	9919	P1843D Apple Tree combinatorics dfs and similar dp math trees *1200	0 / 0	4
	9917	P1843F1 Omsk Metro (simple version) data structures dfs and similar dp graphs greedy math trees *1800	0 / 0	6
	9916	P1843F2 Omsk Metro (hard version) data structures dfs and similar divide and conquer dp math trees *2300	0 / 0	8
	9908	P1844G Tree Weights bitmasks constructive algorithms data structures dfs and similar implementation math matrices number theory trees *3000	0 / 0	10
	9957	P1849F XOR Partition binary search bitmasks data structures divide and conquer greedy trees	0 / 0	(None)
	9951	P1851F Lisa and the Martians bitmasks greedy math strings trees	0 / 0	(None)

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