Problemset - Codeforces

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Codeforces Round 968 (Div. 2)
36:13:27
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Problems

#	Name
1661C	Water the Trees binary search, greedy, math	1700	x9242
1661A	Array Balancing greedy, math	800	x18314
1660F2	Promising String (hard version) data structures, implementation, math, strings	2100	x2684
1660F1	Promising String (easy version) brute force, implementation, math, strings	1700	x7180
1660D	Maximum Product Strikes Back brute force, implementation, math, two pointers	1600	x8546
1660B	Vlad and Candies math	800	x27956
1660A	Vasya and Coins greedy, math	800	x35719
1659D	Reverse Sort Sum constructive algorithms, data structures, greedy, implementation, math, two pointers	1900	x3971
1659C	Line Empire binary search, brute force, dp, greedy, implementation, math	1500	x10281
1659A	Red Versus Blue constructive algorithms, greedy, implementation, math	1000	x18170
1658F	Juju and Binary String brute force, constructive algorithms, greedy, math	2700	x751
1658E	Gojou and Matrix Game data structures, dp, games, hashing, implementation, math, number theory, sortings	2500	x1034
1658D2	388535 (Hard Version) bitmasks, brute force, data structures, math	2300	x2497
1658D1	388535 (Easy Version) bitmasks, math	1600	x8992
1658C	Shinju and the Lost Permutation constructive algorithms, math	1700	x9243
1658B	Marin and Anti-coprime Permutation combinatorics, math, number theory	800	x18526
1658A	Marin and Photoshoot constructive algorithms, implementation, math	800	x20267
1657E	Star MST combinatorics, dp, graph matchings, math	2200	x2052
1657D	For Gamers. By Gamers. binary search, brute force, greedy, math, sortings	2000	x4805
1657A	Integer Moves brute force, math	800	x23912
1656H	Equal LCM Subsets data structures, math, number theory	3200	x565
1656G	Cycle Palindrome constructive algorithms, graphs, math	3200	x380
1656F	Parametric MST binary search, constructive algorithms, graphs, greedy, math, sortings	2600	x1024
1656E	Equal Tree Sums constructive algorithms, dfs and similar, math, trees	2200	x3410
1656D	K-good constructive algorithms, math, number theory	1900	x6806
1656C	Make Equal With Mod constructive algorithms, math, number theory, sortings	1200	x18966
1656B	Subtract Operation data structures, greedy, math, two pointers	1100	x18491
1656A	Good Pairs math, sortings	800	x19540
1654H	Three Minimums combinatorics, constructive algorithms, divide and conquer, dp, fft, math	3500	x75
1654E	Arithmetic Operations brute force, data structures, graphs, math	2300	x2069
1654D	Potion Brewing Class dfs and similar, math, number theory, trees	2100	x2823
1651E	Sum of Matchings brute force, combinatorics, constructive algorithms, dfs and similar, graph matchings, greedy, math	2600	x511
1650E	Rescheduling the Exam binary search, data structures, greedy, implementation, math, sortings	1900	x4111
1650D	Twist the Permutation brute force, constructive algorithms, implementation, math	1300	x12922
1650B	DIV + MOD math	900	x27451
1648B	Integral Array brute force, constructive algorithms, data structures, math	1800	x6356
1648A	Weird Sum combinatorics, data structures, geometry, math, matrices, sortings	1400	x12551
1647D	Madoka and the Best School in Russia constructive algorithms, dp, math, number theory	1900	x5236
1647A	Madoka and Math Dad implementation, math	800	x22690
1646E	Power Board brute force, dp, math, number theory	2200	x2392
1646C	Factorials and Powers of Two bitmasks, brute force, constructive algorithms, dp, math	1500	x13884
1646A	Square Counting math	800	x24185
1644F	Basis combinatorics, fft, math, number theory	2900	x321
1644E	Expand the Path brute force, combinatorics, data structures, implementation, math	1900	x3075
1644D	Cross Coloring data structures, implementation, math	1700	x7181
1641E	Special Positions combinatorics, divide and conquer, fft, math	3300	x205
1641D	Two Arrays bitmasks, brute force, combinatorics, greedy, hashing, math, two pointers	2700	x1134
1638C	Inversion Graph data structures, dsu, graphs, math	1300	x14607
1638B	Odd Swap Sort data structures, math, sortings	1100	x20741
1638A	Reverse constructive algorithms, greedy, math	800	x21394
1637H	Minimize Inversions Number data structures, greedy, math, sortings	3500	x313
1637G	Birthday constructive algorithms, greedy, math	3000	x500
1637D	Yet Another Minimization Problem dp, greedy, math	1800	x7627
1637B	MEX and Array brute force, dp, greedy, math	1100	x14763
1635D	Infinite Set bitmasks, dp, math, matrices, number theory, strings	1800	x6193
1634F	Fibonacci Additions brute force, data structures, hashing, implementation, math	2700	x1586
1634D	Finding Zero constructive algorithms, interactive, math	2000	x4320
1634B	Fortune Telling bitmasks, math	1400	x16335
1633E	Spanning Tree Queries binary search, data structures, dfs and similar, dsu, graphs, greedy, math, sortings, trees	2400	x1509
1633C	Kill the Monster brute force, math	1100	x19930
1632D	New Year Concert binary search, data structures, greedy, math, number theory, two pointers	2000	x4604
1632C	Strange Test binary search, bitmasks, brute force, dp, math	1600	x12632
1630E	Expected Components combinatorics, math, number theory, probabilities	2900	x435
1629B	GCD Arrays greedy, math, number theory	800	x23292
1628D2	Game on Sum (Hard Version) combinatorics, dp, games, math	2400	x2033
1628D1	Game on Sum (Easy Version) combinatorics, dp, games, math	2100	x3106
1628C	Grid Xor constructive algorithms, greedy, implementation, interactive, math	2300	x3141
1628A	Meximum Array binary search, constructive algorithms, greedy, implementation, math, two pointers	1400	x15500
1627D	Not Adding brute force, dp, math, number theory	1900	x8169
1626F	A Random Code Problem combinatorics, dp, math, number theory, probabilities	2800	x726
1626D	Martial Arts Tournament binary search, brute force, greedy, math	2100	x3885
1626C	Monsters And Spells binary search, data structures, dp, greedy, implementation, math, two pointers	1700	x10845
1625D	Binary Spiders bitmasks, data structures, implementation, math, sortings, trees	2300	x2027
1625A	Ancient Civilization bitmasks, greedy, math	800	x17148
1624C	Division by Two and Permutation constructive algorithms, flows, graph matchings, greedy, math	1100	x24678
1624B	Make AP implementation, math	900	x36031
1624A	Plus One on the Subset math	800	x51277
1623D	Robot Cleaner Revisit implementation, math, probabilities	2300	x1362
1623A	Robot Cleaner brute force, implementation, math	800	x20002
1622F	Quadratic Set constructive algorithms, hashing, math, number theory	2900	x627
1622D	Shuffle combinatorics, math, two pointers	2000	x3981
1622B	Berland Music data structures, greedy, math, sortings	1000	x20839
1622A	Construct a Rectangle geometry, math	800	x29883
1621G	Weighted Increasing Subsequences data structures, dp, math	3200	x645
1621D	The Winter Hike constructive algorithms, greedy, math	2100	x4026
1621C	Hidden Permutations dfs and similar, interactive, math	1700	x6839
1620C	BA-String brute force, dp, greedy, implementation, math	1800	x6508
1620B	Triangles on a Rectangle geometry, greedy, math	1000	x20718
1619F	Let's Play the Hat? brute force, constructive algorithms, greedy, math	2000	x2078
1619E	MEX and Increments constructive algorithms, data structures, dp, greedy, implementation, math, sortings	1700	x9069
1619B	Squares and Cubes implementation, math	800	x30604
1618F	Reverse bitmasks, constructive algorithms, dfs and similar, implementation, math, strings	2000	x4165
1618E	Singers' Tour constructive algorithms, math	1700	x7116
1618D	Array and Operations dp, greedy, math	1300	x18769
1618C	Paint the Array math	1100	x22619
1618A	Polycarp and Sums of Subsequences math, sortings	800	x32132
1617E	Christmas Chocolates dfs and similar, dp, games, graphs, implementation, math, number theory, shortest paths, trees	2700	x857
1617D2	Too Many Impostors (hard version) constructive algorithms, implementation, interactive, math	2400	x1768
1617C	Paprika and Permutation binary search, greedy, math, sortings	1300	x14880
1617B	GCD Problem brute force, constructive algorithms, math, number theory	900	x23082