Problemset - Codeforces

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Codeforces Round (Div. 3)
7 days

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Problems

#	Name
1919C	Grouping Increases data structures, dp, greedy	1400	x17275
1918D	Blocking Elements binary search, data structures, dp, implementation, two pointers	1900	x4383
1917F	Construct Tree bitmasks, constructive algorithms, dp, trees	2500	x916
1917D	Yet Another Inversions Problem combinatorics, data structures, dp, implementation, math, number theory	2300	x1691
1917B	Erase First or Second Letter brute force, combinatorics, data structures, dp, strings	1100	x20046
1916H2	Matrix Rank (Hard Version) combinatorics, dp, math, matrices, string suffix structures	2700	x508
1916H1	Matrix Rank (Easy Version) brute force, combinatorics, dp, math, matrices	2700	x589
1916G	Optimizations From Chelsu divide and conquer, dp, number theory, trees	3500	x140
1914G2	Light Bulbs (Hard Version) combinatorics, data structures, dfs and similar, dp, graphs, hashing	2300	x1246
1914G1	Light Bulbs (Easy Version) brute force, combinatorics, dfs and similar, dp, dsu, graphs, math, trees	2100	x1711
1914F	Programming Competition dfs and similar, dp, graph matchings, greedy, trees	1900	x3772
1914D	Three Activities brute force, dp, greedy, implementation, sortings	1200	x18972
1913D	Array Collapse data structures, divide and conquer, dp, trees	2100	x2789
1912K	Kim's Quest bitmasks, combinatorics, dp	1800	x2136
1910I	Inverse Problem *special problem, combinatorics, dp	2700	x46
1910E	Maximum Sum Subarrays *special problem, dp	2100	x183
1909I	Short Permutation Problem combinatorics, dp, fft, math	1900	x98
1909F2	Small Permutation Problem (Hard Version) combinatorics, dp, math	2500	x847
1909F1	Small Permutation Problem (Easy Version) brute force, combinatorics, dp, math	2200	x1666
1906J	Count BFS Graph combinatorics, dp	2100	x675
1906H	Twin Friends combinatorics, dp	2200	x625
1906E	Merge Not Sort constructive algorithms, dp	1900	x1348
1905E	One-X combinatorics, dfs and similar, dp, math, trees	2400	x880
1904B	Collecting Game binary search, dp, greedy, sortings, two pointers	1100	x13496
1903D2	Maximum And Queries (hard version) bitmasks, divide and conquer, dp, greedy	2500	x721
1902D	Robot Queries binary search, data structures, dp, implementation	1900	x3770
1901E	Compressed Tree dfs and similar, dp, graphs, greedy, sortings, trees	2200	x1410
1901D	Yet Another Monster Fight binary search, dp, greedy, implementation, math	1700	x6366
1900E	Transitive Graph dfs and similar, dp, dsu, graphs, implementation	2100	x1874
1900D	Small GCD bitmasks, brute force, dp, math, number theory	2000	x3827
1900C	Anji's Binary Tree dfs and similar, dp, trees	1300	x10712
1900B	Laura and Operations dp, math	900	x16382
1899C	Yarik and Array dp, greedy, two pointers	1100	x18813
1896H2	Cyclic Hamming (Hard Version) brute force, dp, fft, math, number theory	3500	x96
1896H1	Cyclic Hamming (Easy Version) brute force, divide and conquer, dp, fft, math, number theory	3400	x84
1895G	Two Characters, Two Colors binary search, data structures, dp, flows, greedy	3100	x179
1895F	Fancy Arrays combinatorics, dp, math, matrices	2600	x647
1895E	Infinite Card Game binary search, brute force, data structures, dfs and similar, dp, dsu, games, graphs, greedy, sortings, two pointers	2300	x1473
1895C	Torn Lucky Ticket brute force, dp, hashing, implementation, math	1400	x10345
1893E	Cacti Symphony combinatorics, dfs and similar, dp, graphs	3500	x182
1889F	Doremy's Average Tree data structures, dp, greedy, trees	3500	x70
1889C2	Doremy's Drying Plan (Hard Version) data structures, dp	2600	x907
1889C1	Doremy's Drying Plan (Easy Version) brute force, data structures, dp, greedy, sortings	2000	x3074
1886E	I Wanna be the Team Leader bitmasks, constructive algorithms, dp, greedy, math, sortings, two pointers	2400	x1362
1884D	Counting Rhyme dp, math, number theory	2100	x2933
1884C	Medium Design brute force, data structures, dp, greedy, sortings	1700	x5623
1883C	Raspberries dp, math	1000	x23817
1882D	Tree XOR bitmasks, dfs and similar, dp, greedy, trees	1900	x5093
1881F	Minimum Maximum Distance dfs and similar, dp, graphs, shortest paths, trees	1700	x6214
1881E	Block Sequence dp	1500	x12257
1879D	Sum of XOR Functions bitmasks, combinatorics, divide and conquer, dp, math	1700	x6849
1879C	Make it Alternating combinatorics, dp, greedy	1300	x15426
1876E	Ball-Stackable constructive algorithms, data structures, dp, trees	3300	x258
1875D	Jellyfish and Mex dp	1600	x7839
1874G	Jellyfish and Inscryption dp	3500	x77
1874F	Jellyfish and OEIS dp	3500	x187
1874E	Jellyfish and Hack dp, math	3000	x282
1874D	Jellyfish and Miku divide and conquer, dp, math, probabilities	2800	x667
1874C	Jellyfish and EVA dp, graphs, greedy, math, probabilities	2300	x1535
1874B	Jellyfish and Math bitmasks, brute force, dfs and similar, dp, graphs, shortest paths	2400	x1085
1872E	Data Structures Fan binary search, bitmasks, data structures, dp	1500	x12403
1870E	Another MEX Problem bitmasks, brute force, dp, shortest paths	2300	x2239
1870C	Colorful Table binary search, data structures, dp, implementation, math, two pointers	1300	x10955
1868E	Min-Sum-Max constructive algorithms, dp, greedy	3500	x74
1868C	Travel Plan combinatorics, dp, implementation, math, trees	2400	x1098
1868B2	Candy Party (Hard Version) bitmasks, constructive algorithms, dp, greedy, implementation, math	2100	x2299
1866M	Mighty Rock Tower brute force, combinatorics, dp, math, probabilities	2400	x700
1866K	Keen Tree Calculation binary search, data structures, dp, geometry, graphs, implementation, trees	2500	x415
1866J	Jackets and Packets dp	2800	x271
1866I	Imagination Castle dp, games, two pointers	2300	x683
1866G	Grouped Carriages binary search, data structures, dp, flows, greedy	2100	x1538
1866E	Elevators of Tamem dp	2700	x279
1866D	Digital Wallet dp, greedy	2300	x1213
1866C	Completely Searching for Inversions dfs and similar, dp, graphs	1900	x2900
1864H	Asterism Stream dp, math, matrices	3200	x274
1864D	Matrix Cascade brute force, constructive algorithms, data structures, dp, greedy, math	1700	x6446
1863I	Redundant Routes constructive algorithms, dp, trees	3500	x71
1863H	Goldberg Machine 3 dp, trees	3500	x73
1863G	Swaps combinatorics, dp, graphs, math	2800	x578
1863F	Divide, XOR, and Conquer bitmasks, dp, math	2600	x1047
1863E	Speedrun brute force, dfs and similar, dp, graphs, greedy, math, sortings, two pointers	2100	x2648
1862F	Magic Will Save the World binary search, bitmasks, brute force, dp	1800	x5817
1862A	Gift Carpet dp, greedy, implementation, strings	800	x31292
1861E	Non-Intersecting Subpermutations combinatorics, dp, implementation, math	2300	x1640
1861D	Sorting By Multiplication dp, greedy	1800	x6398
1861B	Two Binary Strings constructive algorithms, dp, greedy	1000	x20510
1860D	Balanced String dp	2200	x2829
1860C	Game on Permutation data structures, dp, games, greedy	1400	x12645
1859E	Maximum Monogonosity brute force, dp, math	2500	x1685
1859D	Andrey and Escape from Capygrad binary search, data structures, dp, dsu, greedy, sortings	1800	x6648
1859C	Another Permutation Problem brute force, dp, greedy, math	1200	x16489
1858D	Trees and Segments brute force, data structures, dp, greedy, two pointers	2200	x2727
1858B	The Walkway brute force, dp, greedy, math, number theory	1500	x10827
1856E2	PermuTree (hard version) bitmasks, dfs and similar, dp, fft, greedy, implementation, math, trees	2700	x1328
1856E1	PermuTree (easy version) dfs and similar, dp, trees	1800	x4998
1856C	To Become Max binary search, brute force, data structures, dp	1600	x11367
1854F	Mark and Spaceship brute force, dp	3500	x116
1854E	Game Bundles brute force, constructive algorithms, dp, greedy, math	3000	x386
1854C	Expected Destruction combinatorics, dp, math, probabilities	2500	x1412
1854B	Earn or Unlock bitmasks, brute force, dp	2200	x3392