Problemset - Codeforces

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Codeforces Round 940 (Div. 2)
5 days

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Problems

#	Name
1559B	Mocha and Red and Blue dp, greedy	900	x21901
1559A	Mocha and Math bitmasks, constructive algorithms, math	900	x28156
1558F	Strange Sort data structures, sortings	3300	x348
1558E	Down Below binary search, dfs and similar, graphs, greedy, meet-in-the-middle, shortest paths	3000	x427
1558D	Top-Notch Insertions combinatorics, data structures	2600	x919
1558C	Bottom-Tier Reversals constructive algorithms, greedy	2000	x3132
1558B	Up the Strip brute force, dp, math, number theory, two pointers	1900	x4587
1558A	Charmed by the Game brute force, math	1300	x10906
1557E	Assiut Chess brute force, constructive algorithms, interactive	2800	x686
1557D	Ezzat and Grid data structures, dp, greedy	2200	x2450
1557C	Moamen and XOR bitmasks, combinatorics, dp, math, matrices	1700	x8291
1557B	Moamen and k-subarrays greedy, sortings	1100	x22748
1557A	Ezzat and Two Subsequences brute force, math, sortings	800	x27410
1556H	DIY Tree graphs, greedy, math, probabilities	3300	x318
1556G	Gates to Another World bitmasks, data structures, dsu, two pointers	3300	x301
1556F	Sports Betting bitmasks, combinatorics, dp, graphs, math, probabilities	2500	x1157
1556E	Equilibrium data structures, dp, greedy	2200	x2502
1556D	Take a Guess bitmasks, constructive algorithms, interactive, math	1800	x6436
1556C	Compressed Bracket Sequence brute force, implementation	1800	x5633
1556B	Take Your Places! implementation	1300	x12403
1556A	A Variety of Operations math	800	x17894
1555F	Good Graph data structures, dsu, graphs, trees	2700	x822
1555E	Boring Segments data structures, sortings, trees, two pointers	2100	x3848
1555D	Say No to Palindromes brute force, constructive algorithms, dp, strings	1600	x11679
1555C	Coin Rows brute force, constructive algorithms, dp, implementation	1300	x20750
1555B	Two Tables brute force	1300	x15576
1555A	PizzaForces brute force, math	900	x27150
1554E	You dfs and similar, dp, math, number theory	2600	x1173
1554D	Diane constructive algorithms, greedy, strings	1800	x9037
1554C	Mikasa binary search, bitmasks, greedy, implementation	1800	x8470
1554B	Cobb bitmasks, brute force, greedy, math	1700	x12365
1554A	Cherry greedy	800	x28519
1553I	Stairs combinatorics, divide and conquer, dp, fft, math	3400	x193
1553H	XOR and Distance bitmasks, divide and conquer, trees	2900	x665
1553G	Common Divisor Graph brute force, constructive algorithms, dsu, graphs, hashing, math, number theory	2700	x968
1553F	Pairwise Modulo data structures, math	2300	x2094
1553E	Permutation Shift brute force, combinatorics, constructive algorithms, dfs and similar, dsu, graphs, math	2100	x3224
1553D	Backspace dp, greedy, strings, two pointers	1500	x13247
1553C	Penalty bitmasks, brute force, dp, greedy	1200	x17236
1553B	Reverse String brute force, dp, hashing, implementation, strings	1300	x13772
1553A	Digits Sum math, number theory	800	x30018
1552I	Organizing a Music Festival dfs and similar, math	3400	x120
1552H	Guess the Perimeter binary search, interactive, number theory	3300	x313
1552G	A Serious Referee bitmasks, brute force, dfs and similar, sortings	3000	x445
1552F	Telepanting binary search, data structures, dp, sortings	2200	x2773
1552E	Colors and Intervals constructive algorithms, data structures, greedy, sortings	2300	x1764
1552D	Array Differentiation bitmasks, brute force, constructive algorithms, dfs and similar, dp, graphs, math	1800	x6666
1552C	Maximize the Intersections combinatorics, constructive algorithms, geometry, greedy, sortings	1800	x5761
1552B	Running for Gold combinatorics, graphs, greedy, sortings	1500	x14918
1552A	Subsequence Permutation sortings, strings	800	x23474
1551F	Equidistant Vertices brute force, combinatorics, dfs and similar, dp, trees	2200	x1733
1551E	Fixed Points binary search, brute force, dp	2000	x3660
1551D2	Domino (hard version) constructive algorithms, implementation, math	2100	x2641
1551D1	Domino (easy version) constructive algorithms, math	1700	x6815
1551C	Interesting Story greedy, sortings, strings	1500	x12827
1551B2	Wonderful Coloring - 2 binary search, constructive algorithms, data structures, greedy	1400	x14979
1551B1	Wonderful Coloring - 1 greedy, strings	800	x28564
1551A	Polycarp and Coins greedy, math	800	x47985
1550F	Jumping Around binary search, data structures, divide and conquer, dp, dsu, graphs, shortest paths	2700	x624
1550E	Stringforces binary search, bitmasks, brute force, dp, strings, two pointers	2500	x1435
1550D	Excellent Arrays binary search, combinatorics, constructive algorithms, implementation, math, sortings, two pointers	2300	x1776
1550C	Manhattan Subarrays brute force, geometry, greedy, implementation	1700	x9907
1550B	Maximum Cost Deletion greedy, math	1000	x25604
1550A	Find The Array greedy, math	800	x27581
1549B	Gregor and the Pawn Game dfs and similar, dp, flows, graph matchings, graphs, greedy, implementation	800	x23691
1549A	Gregor and Cryptography math, number theory	800	x31177
1548E	Gregor and the Two Painters data structures, divide and conquer, graphs, greedy, math	3400	x333
1548D2	Gregor and the Odd Cows (Hard) brute force, geometry, math, number theory	3300	x236
1548D1	Gregor and the Odd Cows (Easy) bitmasks, geometry, math, number theory	2300	x1423
1548C	The Three Little Pigs combinatorics, dp, fft, math	2500	x1730
1548B	Integers Have Friends binary search, data structures, divide and conquer, math, number theory, two pointers	1800	x9221
1548A	Web of Lies brute force, graphs, greedy	1400	x15967
1547G	How Many Paths? dfs and similar, dp, graphs, trees	2100	x2760
1547F	Array Stabilization (GCD version) binary search, brute force, data structures, divide and conquer, number theory, two pointers	1900	x5457
1547E	Air Conditioners data structures, dp, implementation, shortest paths, sortings, two pointers	1500	x13736
1547D	Co-growing Sequence bitmasks, constructive algorithms, greedy	1300	x15901
1547C	Pair Programming greedy, two pointers	1100	x21938
1547B	Alphabetical Strings greedy, implementation, strings	800	x25893
1547A	Shortest Path with Obstacle implementation, math	800	x29798
1546B	AquaMoon and Stolen String interactive, math	1200	x12802
1546A	AquaMoon and Two Arrays brute force, greedy	800	x18045
1545F	AquaMoon and Potatoes brute force, data structures, dp	3500	x101
1545E2	AquaMoon and Time Stop (hard version) data structures, dp	3500	x78
1545E1	AquaMoon and Time Stop (easy version) data structures, dp	3500	x73
1545D	AquaMoon and Wrong Coordinate constructive algorithms, interactive, math	3000	x456
1545C	AquaMoon and Permutations 2-sat, brute force, combinatorics, constructive algorithms, graph matchings, graphs	2800	x578
1545B	AquaMoon and Chess combinatorics, math	1900	x5595
1545A	AquaMoon and Strange Sort sortings	1500	x13519
1543E	The Final Pursuit bitmasks, constructive algorithms, divide and conquer, graphs, greedy, math	2700	x392
1543D2	RPD and Rap Sheet (Hard Version) brute force, constructive algorithms, interactive, math	2200	x1936
1543D1	RPD and Rap Sheet (Easy Version) bitmasks, constructive algorithms, interactive, math	1700	x7416
1543C	Need for Pink Slips bitmasks, brute force, dfs and similar, implementation, math, probabilities	1900	x5175
1543B	Customising the Track combinatorics, greedy, math	900	x22600
1543A	Exciting Bets greedy, math, number theory	900	x26187
1542E2	Abnormal Permutation Pairs (hard version) combinatorics, dp, fft, math	2700	x797
1542E1	Abnormal Permutation Pairs (easy version) combinatorics, dp, fft, math	2400	x1177
1542D	Priority Queue combinatorics, dp, implementation, math, ternary search	2200	x2521
1542C	Strange Function math, number theory	1600	x13443
1542B	Plus and Multiply constructive algorithms, math, number theory	1500	x21908
1542A	Odd Set math	800	x41983