Problemset - Codeforces

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Codeforces Round 976 (Div. 2) and Divide By Zero 9.0
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Problems

#	Name
1552D	Array Differentiation bitmasks, brute force, constructive algorithms, dfs and similar, dp, graphs, math	1800	x7006
1552C	Maximize the Intersections combinatorics, constructive algorithms, geometry, greedy, sortings	1800	x5908
1552B	Running for Gold combinatorics, graphs, greedy, sortings	1500	x15405
1551F	Equidistant Vertices brute force, combinatorics, dfs and similar, dp, trees	2200	x1834
1551E	Fixed Points binary search, brute force, dp	2000	x3917
1551D2	Domino (hard version) constructive algorithms, implementation, math	2100	x2756
1551D1	Domino (easy version) constructive algorithms, math	1700	x7061
1551C	Interesting Story greedy, sortings, strings	1500	x13290
1551B2	Wonderful Coloring - 2 binary search, constructive algorithms, data structures, greedy	1400	x15491
1550F	Jumping Around binary search, data structures, divide and conquer, dp, dsu, graphs, shortest paths	2700	x669
1550E	Stringforces binary search, bitmasks, brute force, dp, strings, two pointers	2500	x1527
1550D	Excellent Arrays binary search, combinatorics, constructive algorithms, implementation, math, sortings, two pointers	2300	x1843
1550C	Manhattan Subarrays brute force, geometry, greedy, implementation	1700	x10162
1548E	Gregor and the Two Painters data structures, divide and conquer, graphs, greedy, math	3400	x452
1548D2	Gregor and the Odd Cows (Hard) brute force, geometry, math, number theory	3300	x243
1548D1	Gregor and the Odd Cows (Easy) bitmasks, geometry, math, number theory	2300	x1460
1548C	The Three Little Pigs combinatorics, dp, fft, math	2500	x1834
1548B	Integers Have Friends binary search, data structures, divide and conquer, math, number theory, two pointers	1800	x9809
1548A	Web of Lies brute force, graphs, greedy	1400	x16418
1547G	How Many Paths? dfs and similar, dp, graphs, trees	2100	x2995
1547F	Array Stabilization (GCD version) binary search, brute force, data structures, divide and conquer, number theory, two pointers	1900	x5814
1547E	Air Conditioners data structures, dp, implementation, shortest paths, sortings, two pointers	1500	x14422
1545F	AquaMoon and Potatoes brute force, data structures, dp	3500	x108
1545E2	AquaMoon and Time Stop (hard version) data structures, dp	3500	x86
1545E1	AquaMoon and Time Stop (easy version) data structures, dp	3500	x81
1545D	AquaMoon and Wrong Coordinate constructive algorithms, interactive, math	3000	x494
1545C	AquaMoon and Permutations 2-sat, brute force, combinatorics, constructive algorithms, graph matchings, graphs	2800	x614
1545B	AquaMoon and Chess combinatorics, math	1900	x5930
1545A	AquaMoon and Strange Sort sortings	1500	x13889
1543E	The Final Pursuit bitmasks, constructive algorithms, divide and conquer, graphs, greedy, math	2700	x413
1543D2	RPD and Rap Sheet (Hard Version) brute force, constructive algorithms, interactive, math	2200	x2015
1543D1	RPD and Rap Sheet (Easy Version) bitmasks, constructive algorithms, interactive, math	1700	x7596
1543C	Need for Pink Slips bitmasks, brute force, dfs and similar, implementation, math, probabilities	1900	x5288
1542E2	Abnormal Permutation Pairs (hard version) combinatorics, dp, fft, math	2700	x849
1542E1	Abnormal Permutation Pairs (easy version) combinatorics, dp, fft, math	2400	x1241
1542D	Priority Queue combinatorics, dp, implementation, math, ternary search	2200	x2615
1542C	Strange Function math, number theory	1600	x14187
1542B	Plus and Multiply constructive algorithms, math, number theory	1500	x23074
1540E	Tasty Dishes math, matrices	3500	x105
1540D	Inverse Inversions binary search, brute force, data structures	3200	x277
1540C2	Converging Array (Hard Version) dp, math	2900	x455
1540C1	Converging Array (Easy Version) dp, math	2700	x624
1540B	Tree Array brute force, combinatorics, dp, graphs, math, probabilities, trees	2300	x2604
1540A	Great Graphs constructive algorithms, graphs, greedy, shortest paths, sortings	1400	x13924
1539F	Strange Array data structures, greedy, sortings	2600	x862
1539E	Game with Cards binary search, constructive algorithms, data structures, dp, greedy, implementation	2500	x948
1539D	PriceFixed binary search, greedy, implementation, sortings, two pointers	1600	x11629
1538G	Gift Set binary search, greedy, math, ternary search	2100	x4539
1538F	Interesting Function binary search, dp, math, number theory	1500	x19227
1538E	Funny Substrings data structures, hashing, implementation, matrices, strings	2100	x2895
1538D	Another Problem About Dividing Numbers constructive algorithms, math, number theory	1700	x13583
1537F	Figure Fixing constructive algorithms, dfs and similar, dsu, graphs, greedy, math	2200	x2467
1537E2	Erase and Extend (Hard Version) binary search, data structures, greedy, hashing, string suffix structures, strings, two pointers	2200	x5200
1537E1	Erase and Extend (Easy Version) binary search, brute force, dp, greedy, hashing, implementation, string suffix structures, strings, two pointers	1600	x12919
1537D	Deleting Divisors games, math, number theory	1700	x12372
1536F	Omkar and Akmar chinese remainder theorem, combinatorics, constructive algorithms, fft, games, geometry, math, meet-in-the-middle, string suffix structures	2600	x955
1536E	Omkar and Forest combinatorics, graphs, math, shortest paths	2300	x2414
1536D	Omkar and Medians data structures, greedy, implementation	2000	x4679
1536C	Diluc and Kaeya data structures, dp, hashing, number theory	1500	x14101
1535F	String Distance binary search, brute force, data structures, hashing, implementation, strings	3000	x451
1535E	Gold Transfer binary search, data structures, dp, greedy, interactive, trees	2200	x2745
1535D	Playoff Tournament data structures, dfs and similar, dp, implementation, trees	1800	x7720
1535C	Unstable String binary search, dp, greedy, implementation, strings, two pointers	1400	x16474
1534H	Lost Nodes constructive algorithms, dp, graphs, interactive, sortings, trees	3500	x149
1534G	A New Beginning data structures, dp, geometry, sortings	3300	x565
1534F2	Falling Sand (Hard Version) dfs and similar, dp, graphs, greedy	3000	x538
1534F1	Falling Sand (Easy Version) dfs and similar, graphs, greedy	2500	x1225
1534E	Lost Array graphs, greedy, interactive, shortest paths	2300	x1912
1534D	Lost Tree constructive algorithms, interactive, trees	1800	x6025
1530H	Turing's Award data structures, dp	3400	x156
1530G	What a Reversal constructive algorithms	3300	x144
1530F	Bingo bitmasks, combinatorics, dp, math, probabilities	2600	x794
1530E	Minimax constructive algorithms, greedy, strings	2100	x2967
1530D	Secret Santa constructive algorithms, flows, graphs, greedy, math	1600	x9198
1528F	AmShZ Farm combinatorics, fft, math	3300	x287
1528E	Mashtali and Hagh Trees combinatorics, dp, trees	2900	x522
1528D	It's a bird! No, it's a plane! No, it's AaParsa! constructive algorithms, graphs, shortest paths	2500	x1432
1528C	Trees of Tranquillity data structures, dfs and similar, greedy, trees	2300	x2636
1528B	Kavi on Pairing Duty combinatorics, dp, math	1700	x8691
1528A	Parsa's Humongous Tree dfs and similar, divide and conquer, dp, greedy, trees	1600	x14666
1527E	Partition Game binary search, data structures, divide and conquer, dp	2500	x2313
1527D	MEX Tree combinatorics, dfs and similar, implementation, math, trees	2400	x1903
1527C	Sequence Pair Weight hashing, implementation, math	1600	x13520
1527B2	Palindrome Game (hard version) constructive algorithms, games	1900	x7905
1526F	Median Queries constructive algorithms, interactive, probabilities	3000	x283
1526E	Oolimry and Suffix Array combinatorics, constructive algorithms, math	2400	x1054
1526D	Kill Anton brute force, constructive algorithms, data structures, math, strings	2200	x2471
1526C2	Potions (Hard Version) data structures, greedy	1600	x22561
1526C1	Potions (Easy Version) brute force, data structures, dp, greedy	1500	x22368
1526B	I Hate 1111 dp, math, number theory	1400	x30488
1525F	Goblins And Gnomes brute force, dp, flows, graph matchings	2800	x329
1525E	Assimilation IV combinatorics, dp, math, probabilities, two pointers	2100	x2051
1525D	Armchairs dp, flows, graph matchings, greedy	1800	x9760
1525C	Robot Collisions data structures, greedy, implementation, sortings	2000	x4460
1523H	Hopping Around the Array data structures, dp	3500	x244
1523G	Try Booking data structures, divide and conquer	3200	x465
1523F	Favorite Game bitmasks, dp	3300	x417
1523E	Crypto Lights combinatorics, dp, math, probabilities	2600	x1674
1523D	Love-Hate bitmasks, brute force, dp, probabilities	2400	x2173
1523C	Compression and Expansion brute force, data structures, greedy, implementation, trees	1600	x8757