Problemset - Codeforces

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Educational Codeforces Round 175 (Rated for Div. 2)
00:43:55
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Problems

#	Name
1551E	Fixed Points binary search, brute force, dp	2000	x4066
1551D2	Domino (hard version) constructive algorithms, implementation, math	2100	x2815
1551D1	Domino (easy version) constructive algorithms, math	1700	x7245
1551C	Interesting Story greedy, sortings, strings	1500	x13599
1551B2	Wonderful Coloring - 2 binary search, constructive algorithms, data structures, greedy	1400	x15802
1551B1	Wonderful Coloring - 1 greedy, strings	800	x30027
1551A	Polycarp and Coins greedy, math	800	x53337
1550F	Jumping Around binary search, data structures, divide and conquer, dp, dsu, graphs, shortest paths	2700	x738
1550E	Stringforces binary search, bitmasks, brute force, dp, strings, two pointers	2500	x1618
1550D	Excellent Arrays binary search, combinatorics, constructive algorithms, implementation, math, sortings, two pointers	2300	x1888
1550C	Manhattan Subarrays brute force, geometry, greedy, implementation	1700	x10356
1550B	Maximum Cost Deletion greedy, math	1000	x27108
1550A	Find The Array greedy, math	800	x28501
1549B	Gregor and the Pawn Game dfs and similar, dp, flows, graph matchings, graphs, greedy, implementation	800	x25004
1549A	Gregor and Cryptography math, number theory	800	x33380
1548E	Gregor and the Two Painters data structures, divide and conquer, graphs, greedy, math	3400	x496
1548D2	Gregor and the Odd Cows (Hard) brute force, geometry, math, number theory	3300	x271
1548D1	Gregor and the Odd Cows (Easy) bitmasks, geometry, math, number theory	2300	x1501
1548C	The Three Little Pigs combinatorics, dp, fft, math	2500	x1871
1548B	Integers Have Friends binary search, data structures, divide and conquer, math, number theory, two pointers	1800	x10297
1548A	Web of Lies brute force, graphs, greedy	1400	x16798
1547G	How Many Paths? dfs and similar, dp, graphs, trees	2100	x3162
1547F	Array Stabilization (GCD version) binary search, brute force, data structures, divide and conquer, number theory, two pointers	1900	x6123
1547E	Air Conditioners data structures, dp, implementation, shortest paths, sortings, two pointers	1500	x14879
1547D	Co-growing Sequence bitmasks, constructive algorithms, greedy	1300	x17240
1547C	Pair Programming greedy, two pointers	1100	x23142
1547B	Alphabetical Strings greedy, implementation, strings	800	x26862
1547A	Shortest Path with Obstacle implementation, math	800	x31042
1546B	AquaMoon and Stolen String interactive, math	1200	x13329
1546A	AquaMoon and Two Arrays brute force, greedy	800	x18339
1545F	AquaMoon and Potatoes brute force, data structures, dp	3500	x115
1545E2	AquaMoon and Time Stop (hard version) data structures, dp	3500	x90
1545E1	AquaMoon and Time Stop (easy version) data structures, dp	3500	x90
1545D	AquaMoon and Wrong Coordinate constructive algorithms, interactive, math	3000	x564
1545C	AquaMoon and Permutations 2-sat, brute force, combinatorics, constructive algorithms, graph matchings, graphs	2800	x651
1545B	AquaMoon and Chess combinatorics, math	1900	x6089
1545A	AquaMoon and Strange Sort sortings	1500	x14176
1543E	The Final Pursuit bitmasks, constructive algorithms, divide and conquer, graphs, greedy, math	2700	x420
1543D2	RPD and Rap Sheet (Hard Version) brute force, constructive algorithms, interactive, math	2200	x2040
1543D1	RPD and Rap Sheet (Easy Version) bitmasks, constructive algorithms, interactive, math	1700	x7719
1543C	Need for Pink Slips bitmasks, brute force, dfs and similar, implementation, math, probabilities	1900	x5379
1543B	Customising the Track combinatorics, greedy, math	900	x23574
1543A	Exciting Bets greedy, math, number theory	900	x30313
1542E2	Abnormal Permutation Pairs (hard version) combinatorics, dp, fft, math	2700	x890
1542E1	Abnormal Permutation Pairs (easy version) combinatorics, dp, fft, math	2400	x1284
1542D	Priority Queue combinatorics, dp, implementation, math, ternary search	2200	x2698
1542C	Strange Function math, number theory	1600	x14727
1542B	Plus and Multiply constructive algorithms, math, number theory	1500	x24012
1542A	Odd Set math	800	x46527
1541B	Pleasant Pairs brute force, implementation, math, number theory	1200	x30280
1541A	Pretty Permutations constructive algorithms, greedy, implementation	800	x29770
1540E	Tasty Dishes math, matrices	3500	x110
1540D	Inverse Inversions binary search, brute force, data structures	3200	x296
1540C2	Converging Array (Hard Version) dp, math	2900	x483
1540C1	Converging Array (Easy Version) dp, math	2700	x649
1540B	Tree Array brute force, combinatorics, dp, graphs, math, probabilities, trees	2300	x2706
1540A	Great Graphs constructive algorithms, graphs, greedy, shortest paths, sortings	1400	x14189
1539F	Strange Array data structures, greedy, sortings	2600	x906
1539E	Game with Cards binary search, constructive algorithms, data structures, dp, greedy, implementation	2500	x984
1539D	PriceFixed binary search, greedy, implementation, sortings, two pointers	1600	x11933
1539C	Stable Groups greedy, sortings	1200	x24354
1539B	Love Song dp, implementation, strings	800	x25149
1539A	Contest Start combinatorics, geometry, greedy, math	1000	x20505
1538G	Gift Set binary search, greedy, math, ternary search	2100	x4699
1538F	Interesting Function binary search, dp, math, number theory	1500	x20001
1538E	Funny Substrings data structures, hashing, implementation, matrices, strings	2100	x2971
1538D	Another Problem About Dividing Numbers constructive algorithms, math, number theory	1700	x14015
1538C	Number of Pairs binary search, data structures, math, two pointers	1300	x30044
1538B	Friends and Candies greedy, math	800	x32097
1538A	Stone Game brute force, dp, greedy	800	x37751
1537F	Figure Fixing constructive algorithms, dfs and similar, dsu, graphs, greedy, math	2200	x2555
1537E2	Erase and Extend (Hard Version) binary search, data structures, greedy, hashing, string suffix structures, strings, two pointers	2200	x5371
1537E1	Erase and Extend (Easy Version) binary search, brute force, dp, greedy, hashing, implementation, string suffix structures, strings, two pointers	1600	x13643
1537D	Deleting Divisors games, math, number theory	1700	x12745
1537C	Challenging Cliffs constructive algorithms, greedy, implementation, math	1200	x28408
1537B	Bad Boy constructive algorithms, greedy, math	900	x32142
1537A	Arithmetic Array greedy, math	800	x38272
1536F	Omkar and Akmar chinese remainder theorem, combinatorics, constructive algorithms, fft, games, geometry, math, meet-in-the-middle, string suffix structures	2600	x984
1536E	Omkar and Forest combinatorics, graphs, math, shortest paths	2300	x2501
1536D	Omkar and Medians data structures, greedy, implementation	2000	x4820
1536C	Diluc and Kaeya data structures, dp, hashing, number theory	1500	x14672
1536B	Prinzessin der Verurteilung brute force, constructive algorithms, strings	1200	x19778
1536A	Omkar and Bad Story brute force, constructive algorithms	800	x20321
1535F	String Distance binary search, brute force, data structures, hashing, implementation, strings	3000	x472
1535E	Gold Transfer binary search, data structures, dp, greedy, interactive, trees	2200	x2843
1535D	Playoff Tournament data structures, dfs and similar, dp, implementation, trees	1800	x7964
1535C	Unstable String binary search, dp, greedy, implementation, strings, two pointers	1400	x16901
1535B	Array Reodering brute force, greedy, math, number theory, sortings	900	x31351
1535A	Fair Playoff brute force, implementation	800	x51658
1534H	Lost Nodes constructive algorithms, dp, graphs, interactive, sortings, trees	3500	x230
1534G	A New Beginning data structures, dp, geometry, sortings	3300	x639
1534F2	Falling Sand (Hard Version) dfs and similar, dp, graphs, greedy	3000	x624
1534F1	Falling Sand (Easy Version) dfs and similar, graphs, greedy	2500	x1285
1534E	Lost Array graphs, greedy, interactive, shortest paths	2300	x1993
1534D	Lost Tree constructive algorithms, interactive, trees	1800	x6230
1534C	Little Alawn's Puzzle combinatorics, dp, dsu, graphs, math	1300	x13039
1534B	Histogram Ugliness greedy, implementation, math	1100	x12595
1534A	Colour the Flag brute force, implementation	800	x12844
1533J	Pawns *special problem		x46
1533I	Excursions *special problem, constructive algorithms, dfs and similar, flows, graph matchings, graphs		x54