Problemset - Codeforces

Problems

#	Name
1551D1	Domino (easy version) constructive algorithms, math	1700	x7136
1551C	Interesting Story greedy, sortings, strings	1500	x13401
1551B2	Wonderful Coloring - 2 binary search, constructive algorithms, data structures, greedy	1400	x15602
1550F	Jumping Around binary search, data structures, divide and conquer, dp, dsu, graphs, shortest paths	2700	x682
1550E	Stringforces binary search, bitmasks, brute force, dp, strings, two pointers	2500	x1552
1550D	Excellent Arrays binary search, combinatorics, constructive algorithms, implementation, math, sortings, two pointers	2300	x1859
1550C	Manhattan Subarrays brute force, geometry, greedy, implementation	1700	x10240
1548E	Gregor and the Two Painters data structures, divide and conquer, graphs, greedy, math	3400	x463
1548D2	Gregor and the Odd Cows (Hard) brute force, geometry, math, number theory	3300	x265
1548D1	Gregor and the Odd Cows (Easy) bitmasks, geometry, math, number theory	2300	x1478
1548C	The Three Little Pigs combinatorics, dp, fft, math	2500	x1844
1548B	Integers Have Friends binary search, data structures, divide and conquer, math, number theory, two pointers	1800	x9991
1548A	Web of Lies brute force, graphs, greedy	1400	x16533
1547G	How Many Paths? dfs and similar, dp, graphs, trees	2100	x3029
1547F	Array Stabilization (GCD version) binary search, brute force, data structures, divide and conquer, number theory, two pointers	1900	x5918
1547E	Air Conditioners data structures, dp, implementation, shortest paths, sortings, two pointers	1500	x14583
1545F	AquaMoon and Potatoes brute force, data structures, dp	3500	x110
1545E2	AquaMoon and Time Stop (hard version) data structures, dp	3500	x88
1545E1	AquaMoon and Time Stop (easy version) data structures, dp	3500	x84
1545D	AquaMoon and Wrong Coordinate constructive algorithms, interactive, math	3000	x499
1545C	AquaMoon and Permutations 2-sat, brute force, combinatorics, constructive algorithms, graph matchings, graphs	2800	x641
1545B	AquaMoon and Chess combinatorics, math	1900	x6007
1545A	AquaMoon and Strange Sort sortings	1500	x13996
1543E	The Final Pursuit bitmasks, constructive algorithms, divide and conquer, graphs, greedy, math	2700	x414
1543D2	RPD and Rap Sheet (Hard Version) brute force, constructive algorithms, interactive, math	2200	x2025
1543D1	RPD and Rap Sheet (Easy Version) bitmasks, constructive algorithms, interactive, math	1700	x7645
1543C	Need for Pink Slips bitmasks, brute force, dfs and similar, implementation, math, probabilities	1900	x5317
1542E2	Abnormal Permutation Pairs (hard version) combinatorics, dp, fft, math	2700	x866
1542E1	Abnormal Permutation Pairs (easy version) combinatorics, dp, fft, math	2400	x1257
1542D	Priority Queue combinatorics, dp, implementation, math, ternary search	2200	x2666
1542C	Strange Function math, number theory	1600	x14347
1542B	Plus and Multiply constructive algorithms, math, number theory	1500	x23372
1540E	Tasty Dishes math, matrices	3500	x107
1540D	Inverse Inversions binary search, brute force, data structures	3200	x282
1540C2	Converging Array (Hard Version) dp, math	2900	x474
1540C1	Converging Array (Easy Version) dp, math	2700	x641
1540B	Tree Array brute force, combinatorics, dp, graphs, math, probabilities, trees	2300	x2659
1540A	Great Graphs constructive algorithms, graphs, greedy, shortest paths, sortings	1400	x14015
1539F	Strange Array data structures, greedy, sortings	2600	x883
1539E	Game with Cards binary search, constructive algorithms, data structures, dp, greedy, implementation	2500	x960
1539D	PriceFixed binary search, greedy, implementation, sortings, two pointers	1600	x11728
1538G	Gift Set binary search, greedy, math, ternary search	2100	x4590
1538F	Interesting Function binary search, dp, math, number theory	1500	x19460
1538E	Funny Substrings data structures, hashing, implementation, matrices, strings	2100	x2914
1538D	Another Problem About Dividing Numbers constructive algorithms, math, number theory	1700	x13735
1537F	Figure Fixing constructive algorithms, dfs and similar, dsu, graphs, greedy, math	2200	x2495
1537E2	Erase and Extend (Hard Version) binary search, data structures, greedy, hashing, string suffix structures, strings, two pointers	2200	x5256
1537E1	Erase and Extend (Easy Version) binary search, brute force, dp, greedy, hashing, implementation, string suffix structures, strings, two pointers	1600	x13154
1537D	Deleting Divisors games, math, number theory	1700	x12512
1536F	Omkar and Akmar chinese remainder theorem, combinatorics, constructive algorithms, fft, games, geometry, math, meet-in-the-middle, string suffix structures	2600	x964
1536E	Omkar and Forest combinatorics, graphs, math, shortest paths	2300	x2449
1536D	Omkar and Medians data structures, greedy, implementation	2000	x4720
1536C	Diluc and Kaeya data structures, dp, hashing, number theory	1500	x14313
1535F	String Distance binary search, brute force, data structures, hashing, implementation, strings	3000	x455
1535E	Gold Transfer binary search, data structures, dp, greedy, interactive, trees	2200	x2784
1535D	Playoff Tournament data structures, dfs and similar, dp, implementation, trees	1800	x7804
1535C	Unstable String binary search, dp, greedy, implementation, strings, two pointers	1400	x16601
1534H	Lost Nodes constructive algorithms, dp, graphs, interactive, sortings, trees	3500	x151
1534G	A New Beginning data structures, dp, geometry, sortings	3300	x576
1534F2	Falling Sand (Hard Version) dfs and similar, dp, graphs, greedy	3000	x565
1534F1	Falling Sand (Easy Version) dfs and similar, graphs, greedy	2500	x1255
1534E	Lost Array graphs, greedy, interactive, shortest paths	2300	x1958
1534D	Lost Tree constructive algorithms, interactive, trees	1800	x6106
1530H	Turing's Award data structures, dp	3400	x161
1530G	What a Reversal constructive algorithms	3300	x144
1530F	Bingo bitmasks, combinatorics, dp, math, probabilities	2600	x831
1530E	Minimax constructive algorithms, greedy, strings	2100	x2990
1530D	Secret Santa constructive algorithms, flows, graphs, greedy, math	1600	x9287
1528F	AmShZ Farm combinatorics, fft, math	3300	x289
1528E	Mashtali and Hagh Trees combinatorics, dp, trees	2900	x534
1528D	It's a bird! No, it's a plane! No, it's AaParsa! constructive algorithms, graphs, shortest paths	2500	x1448
1528C	Trees of Tranquillity data structures, dfs and similar, greedy, trees	2300	x2663
1528B	Kavi on Pairing Duty combinatorics, dp, math	1700	x8768
1528A	Parsa's Humongous Tree dfs and similar, divide and conquer, dp, greedy, trees	1600	x14994
1527E	Partition Game binary search, data structures, divide and conquer, dp	2500	x2363
1527D	MEX Tree combinatorics, dfs and similar, implementation, math, trees	2400	x1924
1527C	Sequence Pair Weight hashing, implementation, math	1600	x13655
1527B2	Palindrome Game (hard version) constructive algorithms, games	1900	x7988
1526F	Median Queries constructive algorithms, interactive, probabilities	3000	x292
1526E	Oolimry and Suffix Array combinatorics, constructive algorithms, math	2400	x1067
1526D	Kill Anton brute force, constructive algorithms, data structures, math, strings	2200	x2484
1526C2	Potions (Hard Version) data structures, greedy	1600	x23122
1526C1	Potions (Easy Version) brute force, data structures, dp, greedy	1500	x22837
1526B	I Hate 1111 dp, math, number theory	1400	x31069
1525F	Goblins And Gnomes brute force, dp, flows, graph matchings	2800	x332
1525E	Assimilation IV combinatorics, dp, math, probabilities, two pointers	2100	x2081
1525D	Armchairs dp, flows, graph matchings, greedy	1800	x9870
1525C	Robot Collisions data structures, greedy, implementation, sortings	2000	x4503
1523H	Hopping Around the Array data structures, dp	3500	x251
1523G	Try Booking data structures, divide and conquer	3200	x466
1523F	Favorite Game bitmasks, dp	3300	x437
1523E	Crypto Lights combinatorics, dp, math, probabilities	2600	x1698
1523D	Love-Hate bitmasks, brute force, dp, probabilities	2400	x2188
1523C	Compression and Expansion brute force, data structures, greedy, implementation, trees	1600	x8809
1521E	Nastia and a Beautiful Matrix binary search, constructive algorithms, dp, greedy	2700	x681
1521D	Nastia Plays with a Tree constructive algorithms, data structures, dfs and similar, dp, dsu, greedy, implementation, trees	2500	x1974
1521C	Nastia and a Hidden Permutation constructive algorithms, interactive	2000	x4384
1520G	To Go Or Not To Go? brute force, dfs and similar, graphs, greedy, implementation, shortest paths	2200	x3755
1520F2	Guess the K-th Zero (Hard version) binary search, constructive algorithms, data structures, interactive	2200	x3042
1520F1	Guess the K-th Zero (Easy version) binary search, interactive	1600	x11929