Problemset - Codeforces

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Rayan Programming Contest 2024 - Selection (Codeforces Round, Div. 1 + Div. 2)
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Problems

#	Name
1981C	Turtle and an Incomplete Sequence bitmasks, brute force, constructive algorithms, greedy, implementation, math	1800	x5375
1981B	Turtle and an Infinite Sequence bitmasks, math	1300	x13783
1981A	Turtle and Piggy Are Playing a Game brute force, greedy, math	800	x22341
1980G	Yasya and the Mysterious Tree bitmasks, data structures, dfs and similar, graphs, greedy, strings, trees	2300	x1260
1980F2	Field Division (hard version) math, sortings	2400	x1009
1980F1	Field Division (easy version) data structures, math, sortings	1900	x3764
1980E	Permutation of Rows and Columns constructive algorithms, data structures, greedy, hashing, implementation, math, matrices, sortings	1600	x10577
1980D	GCD-sequence greedy, implementation, math, number theory	1400	x14364
1980C	Sofia and the Lost Operations constructive algorithms, greedy	1300	x18674
1980B	Choosing Cubes sortings, sortings	800	x34788
1980A	Problem Generator math	800	x40795
1979F	Kostyanych's Theorem brute force, constructive algorithms, graphs, interactive	2900	x316
1979E	Manhattan Triangle binary search, constructive algorithms, data structures, geometry, implementation, two pointers	2400	x1457
1979D	Fixing a Binary String bitmasks, brute force, constructive algorithms, dp, greedy, hashing, strings	1800	x6670
1979C	Earning on Bets binary search, combinatorics, constructive algorithms, number theory	1200	x18851
1979B	XOR Sequences bitmasks, greedy	1000	x22681
1979A	Guess the Maximum brute force, greedy, implementation	800	x29107
1978F	Large Graph data structures, dfs and similar, dsu, graphs, number theory, two pointers	2400	x1351
1978E	Computing Machine brute force, data structures, dp, greedy, implementation	2000	x3844
1978D	Elections data structures, greedy, implementation, math	1600	x11373
1978C	Manhattan Permutations constructive algorithms, data structures, greedy, implementation, math	1300	x15021
1978B	New Bakery binary search, greedy, math, ternary search	800	x22429
1978A	Alice and Books constructive algorithms, greedy, sortings	800	x25800
1977E	Tensor constructive algorithms, graphs, interactive	2600	x690
1977D	XORificator bitmasks, brute force, greedy, hashing	2300	x1874
1977C	Nikita and LCM brute force, data structures, dp, greedy, math, number theory, sortings	1900	x6793
1977B	Binary Colouring bitmasks, constructive algorithms, greedy, math	1100	x17700
1977A	Little Nikita math	800	x33228
1976F	Remove Bridges data structures, dfs and similar, dp, greedy, sortings, trees	2800	x596
1976E	Splittable Permutations combinatorics, data structures, dfs and similar, greedy, math, trees	2500	x1046
1976D	Invertible Bracket Sequences binary search, combinatorics, data structures, divide and conquer, implementation, two pointers	2000	x4644
1976C	Job Interview binary search, dp, greedy, implementation, two pointers	1600	x10443
1976B	Increase/Decrease/Copy greedy, implementation	1100	x22332
1976A	Verify Password implementation, sortings, strings	800	x28694
1975I	Mind Bloom dp	3500	x100
1975H	378QAQ and Core greedy, strings	3500	x116
1975G	Zimpha Fan Club fft, greedy, math, strings	3000	x241
1975F	Set bitmasks, brute force, combinatorics, dfs and similar, divide and conquer, dp, math	2600	x836
1975E	Chain Queries binary search, data structures, dfs and similar, implementation, trees	2100	x2335
1975D	Paint the Tree brute force, dfs and similar, dp, greedy, shortest paths, trees	1700	x6076
1975C	Chamo and Mocha's Array binary search, brute force, greedy	1200	x14643
1975B	378QAQ and Mocha's Array brute force, greedy, math, sortings	1000	x17932
1975A	Bazoka and Mocha's Array brute force, greedy, implementation, sortings	800	x18564
1974G	Money Buys Less Happiness Now data structures, greedy, sortings	2000	x4392
1974F	Cutting Game binary search, brute force, data structures, implementation, sortings, two pointers	1900	x3592
1974E	Money Buys Happiness dp	1800	x8091
1974D	Ingenuity-2 constructive algorithms, greedy, implementation	1400	x14883
1974C	Beautiful Triple Pairs combinatorics, data structures	1400	x15851
1974B	Symmetric Encoding implementation, sortings, strings	800	x30374
1974A	Phone Desktop greedy, math	800	x33331
1973F	Maximum GCD Sum Queries bitmasks, brute force, dp, implementation, number theory	3100	x232
1973E	Cat, Fox and Swaps graphs, math, sortings	2500	x809
1973D	Cat, Fox and Maximum Array Split brute force, interactive, math	2400	x1925
1973C	Cat, Fox and Double Maximum constructive algorithms, greedy, implementation, math, sortings	1700	x8413
1973B	Cat, Fox and the Lonely Array binary search, bitmasks, data structures, greedy, math, two pointers	1300	x14172
1973A	Chess For Three brute force, dp, implementation, math	900	x24663
1972B	Coin Games games	900	x21714
1972A	Contest Proposal brute force, greedy, two pointers	800	x23022
1971H	±1 2-sat, dfs and similar, graphs	2100	x1862
1971G	XOUR data structures, dsu, sortings	1700	x9329
1971F	Circle Perimeter binary search, brute force, dfs and similar, geometry, implementation, math	1600	x10080
1971E	Find the Car binary search, math, sortings	1500	x14400
1971D	Binary Cut dp, greedy, implementation, sortings, strings	1100	x26001
1971C	Clock and Strings implementation	900	x33343
1971B	Different String implementation, strings	800	x37137
1971A	My First Sorting Problem implementation, sortings	800	x45725
1970G3	Min-Fund Prison (Hard) bitmasks, dfs and similar, dp, graphs, trees	2400	x350
1970G2	Min-Fund Prison (Medium) brute force, dfs and similar, dp, graphs, trees	2200	x594
1970G1	Min-Fund Prison (Easy) dfs and similar, trees	1900	x1363
1970F3	Playing Quidditch (Hard) implementation	2300	x361
1970F2	Playing Quidditch (Medium) implementation	2300	x348
1970F1	Playing Quidditch (Easy) implementation	2300	x428
1970E3	Trails (Hard) dp, matrices	2200	x755
1970E2	Trails (Medium) dp, matrices	2000	x1317
1970E1	Trails (Easy) dp	1800	x2232
1970D3	Arithmancy (Hard) interactive	3100	x111
1970D2	Arithmancy (Medium) constructive algorithms, interactive, probabilities, strings	2600	x209
1970D1	Arithmancy (Easy) brute force, constructive algorithms, interactive, strings	2100	x651
1970C3	Game on Tree (Hard) dfs and similar, dp, games, trees	1900	x1600
1970C2	Game on Tree (Medium) dfs and similar, dp, games, trees	1700	x2787
1970C1	Game on Tree (Easy) games	1400	x3513
1970B3	Exact Neighbours (Hard) constructive algorithms	2300	x492
1970B2	Exact Neighbours (Medium) constructive algorithms	2100	x821
1970B1	Exact Neighbours (Easy) constructive algorithms	1900	x1163
1970A3	Balanced Unshuffle (Hard) constructive algorithms, trees	2400	x473
1970A2	Balanced Unshuffle (Medium) brute force, constructive algorithms, trees	2400	x452
1970A1	Balanced Shuffle (Easy) implementation, sortings	1000	x5027
1969F	Card Pairing dp, greedy, hashing, implementation	3000	x279
1969E	Unique Array binary search, data structures, divide and conquer, dp, greedy	2400	x1397
1969D	Shop Game data structures, greedy, math, sortings	1900	x4663
1969C	Minimizing the Sum dp, implementation	1700	x8842
1969B	Shifts and Sorting constructive algorithms, greedy	1000	x19198
1969A	Two Friends constructive algorithms, implementation, math	800	x20020
1968G2	Division + LCP (hard version) binary search, brute force, data structures, dp, hashing, math, string suffix structures, strings	2200	x1980
1968G1	Division + LCP (easy version) binary search, data structures, dp, hashing, string suffix structures, strings	1900	x4310
1968F	Equal XOR Segments binary search, data structures	1800	x5550
1968E	Cells Arrangement constructive algorithms	1600	x10493
1968D	Permutation Game brute force, dfs and similar, games, graphs, greedy, math	1300	x15012
1968C	Assembly via Remainders constructive algorithms, number theory	1000	x25172
1968B	Prefiquence greedy, two pointers	800	x28030