Problemset - Codeforces

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Codeforces Round (Div. 2)
6 days

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Problems

#	Name
1603E	A Perfect Problem combinatorics, dp, math	3200	x433
1603D	Artistic Partition divide and conquer, dp, number theory	3000	x674
1603C	Extreme Extension dp, greedy, math, number theory	2300	x2036
1603B	Moderate Modular Mode constructive algorithms, math, number theory	1600	x13552
1603A	Di-visible Confusion constructive algorithms, math, number theory	1300	x16640
1602B	Divine Array constructive algorithms, implementation	1100	x14093
1602A	Two Subsequences implementation	800	x18981
1601F	Two Sorts binary search, dfs and similar, math, meet-in-the-middle	3400	x184
1601E	Phys Ed Online data structures, dp, greedy	2900	x477
1601D	Difficult Mountain data structures, dp, greedy, sortings	2700	x1456
1601C	Optimal Insertion data structures, divide and conquer, dp, greedy, sortings	2300	x2015
1601B	Frog Traveler data structures, dfs and similar, dp, graphs, shortest paths, two pointers	1900	x4963
1601A	Array Elimination bitmasks, greedy, math, number theory	1300	x14609
1600J	Robot Factory bitmasks, dfs and similar	1400	x3919
1600F	Party Organization brute force, math, probabilities	2300	x488
1600E	Array Game games, greedy, two pointers	1900	x2101
1599J	Bob's Beautiful Array bitmasks, brute force, greedy	2600	x301
1599I	Desert data structures, graphs	2700	x121
1599H	Hidden Fortress interactive, math	2100	x1060
1599G	Shortest path brute force, geometry, math, shortest paths	2700	x371
1599F	Mars hashing	2700	x337
1599E	Two Arrays data structures, matrices	3200	x67
1599D	Bubble Popping	3200	x30
1599C	Bubble Strike combinatorics, math, probabilities, ternary search	2000	x1660
1599B	Restaurant Game	3100	x142
1599A	Weights constructive algorithms, greedy, two pointers	2600	x681
1598G	The Sum of Good Numbers hashing, math, string suffix structures, strings	3200	x333
1598F	RBS binary search, bitmasks, brute force, data structures, dp	2400	x1424
1598E	Staircases brute force, combinatorics, data structures, dfs and similar, dp, implementation, math	2100	x2303
1598D	Training Session combinatorics, data structures, geometry, implementation, math	1700	x8689
1598C	Delete Two Elements data structures, dp, implementation, math, two pointers	1200	x20829
1598B	Groups brute force, implementation	1000	x16071
1598A	Computer Game brute force, dfs and similar, dp, implementation	800	x23340
1594F	Ideal Farm constructive algorithms, math	2400	x1345
1594E2	Rubik's Cube Coloring (hard version) brute force, dp, implementation, math, trees	2300	x1485
1594E1	Rubik's Cube Coloring (easy version) combinatorics, math	1300	x11093
1594D	The Number of Imposters constructive algorithms, dfs and similar, dp, dsu, graphs	1700	x7501
1594C	Make Them Equal brute force, greedy, math, strings	1200	x19484
1594B	Special Numbers bitmasks, math	1100	x19897
1594A	Consecutive Sum Riddle math	800	x24625
1593G	Changing Brackets constructive algorithms, data structures, dp, greedy	2200	x1692
1593F	Red-Black Number dfs and similar, dp, implementation, math, meet-in-the-middle	2100	x2442
1593E	Gardener and Tree brute force, data structures, dfs and similar, greedy, implementation, trees	1600	x12414
1593D2	Half of Same brute force, math, number theory	1900	x5015
1593D1	All are Same math, number theory	1100	x20161
1593C	Save More Mice binary search, greedy, greedy	1000	x24843
1593B	Make it Divisible by 25 dfs and similar, dp, greedy, math, math	900	x27160
1593A	Elections math	800	x36714
1592F2	Alice and Recoloring 2 constructive algorithms, flows, graph matchings, greedy	2800	x726
1592F1	Alice and Recoloring 1 constructive algorithms, greedy	2600	x861
1592E	Bored Bakry bitmasks, greedy, math, two pointers	2400	x1642
1592D	Hemose in ICPC ? binary search, dfs and similar, implementation, interactive, math, number theory, trees	2300	x2242
1592C	Bakry and Partitioning bitmasks, constructive algorithms, dfs and similar, dp, graphs, trees	1700	x8000
1592B	Hemose Shopping constructive algorithms, dsu, math, sortings	1200	x15981
1592A	Gamer Hemose binary search, greedy, math, sortings	800	x22193
1588F	Jumping Through the Array binary search, data structures, graphs, two pointers	3500	x284
1586I	Omkar and Mosaic combinatorics, constructive algorithms, math	3500	x192
1585G	Poachers dp, games, graphs, trees	2500	x182
1585F	Non-equal Neighbours combinatorics, dp, math	2400	x1241
1585E	Frequency Queries data structures, dfs and similar, trees	2400	x1056
1585D	Yet Another Sorting Problem data structures, math	1900	x3852
1585C	Minimize Distance greedy	1300	x12020
1585B	Array Eversion greedy	900	x15101
1585A	Life of a Flower implementation	800	x17794
1584G	Eligible Segments geometry	3200	x209
1584F	Strange LCS bitmasks, dp, graphs, greedy, strings	2600	x971
1584E	Game with Stones binary search, data structures, games, greedy	2300	x1280
1584D	Guess the Permutation binary search, combinatorics, interactive, math	2000	x3673
1584C	Two Arrays greedy, math, sortings	900	x16357
1584B	Coloring Rectangles greedy, math	1000	x13352
1584A	Mathematical Addition math	800	x14898
1583H	Omkar and Tours data structures, divide and conquer, sortings, trees	3300	x323
1583G	Omkar and Time Travel data structures, math	3000	x453
1583F	Defender of Childhood Dreams bitmasks, constructive algorithms, divide and conquer	2500	x1300
1583E	Moment of Bloom constructive algorithms, dfs and similar, graph matchings, graphs, greedy, trees	2200	x2221
1583D	Omkar and the Meaning of Life constructive algorithms, greedy, interactive	1800	x5385
1583C	Omkar and Determination data structures, dp	1700	x6937
1583B	Omkar and Heavenly Tree constructive algorithms, trees	1200	x12258
1583A	Windblume Ode math, number theory	800	x13732
1582G	Kuzya and Homework data structures, number theory	2600	x594
1582F2	Korney Korneevich and XOR (hard version) binary search, brute force, dp, greedy, two pointers	2400	x1816
1582F1	Korney Korneevich and XOR (easy version) bitmasks, dp, greedy	1800	x5591
1582E	Pchelyonok and Segments binary search, data structures, dp, greedy, math	2000	x3739
1582D	Vupsen, Pupsen and 0 constructive algorithms, math	1600	x10525
1582C	Grandma Capa Knits a Scarf brute force, data structures, greedy, strings, two pointers	1200	x15644
1582B	Luntik and Subsequences combinatorics, math	900	x20458
1582A	Luntik and Concerts math	800	x18512
1581B	Diameter of Graph constructive algorithms, graphs, greedy, math	1200	x11374
1581A	CQXYM Count Permutations combinatorics, math, number theory	800	x13436
1580F	Problems for Codeforces combinatorics, fft, math	3300	x133
1580E	Railway Construction brute force, constructive algorithms, data structures, graphs, shortest paths	3400	x73
1580D	Subsequence brute force, divide and conquer, dp, greedy, trees	2900	x875
1580C	Train Maintenance brute force, data structures, implementation	2200	x1798
1580B	Mathematics Curriculum brute force, combinatorics, dp, trees	2600	x1039
1580A	Portal brute force, data structures, dp, greedy, implementation	1700	x3656
1579G	Minimal Coverage dp	2200	x2378
1579F	Array Stabilization (AND version) brute force, graphs, math, number theory, shortest paths	1700	x4790
1579E2	Array Optimization by Deque data structures, greedy	1700	x6656
1579E1	Permutation Minimization by Deque constructive algorithms, greedy, math	1000	x21643
1579D	Productive Meeting constructive algorithms, graphs, greedy	1400	x16054