Problemset - Codeforces

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Codeforces Round (Div. 2)
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Problems

#	Name
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x10994
1926C	Vlad and a Sum of Sum of Digits dp, implementation	1200	x24753
1925D	Good Trip combinatorics, dp, math, probabilities	1900	x3392
1924F	Anti-Proxy Attendance constructive algorithms, dp, interactive, ternary search	3500	x141
1924D	Balanced Subsequences combinatorics, dp, math	2700	x831
1924A	Did We Get Everything Covered? constructive algorithms, dp, greedy, shortest paths, strings	1500	x13017
1923E	Count Paths data structures, dfs and similar, dp, dsu, graphs, trees	2000	x3437
1923B	Monsters Attack! dp, greedy, implementation	1100	x16903
1922F	Replace on Segment dp, graph matchings	2500	x1262
1921G	Mischievous Shooter brute force, data structures, divide and conquer, dp, implementation	2200	x1179
1921F	Sum of Progression brute force, data structures, dp, implementation, math	1900	x3615
1920E	Counting Binary Strings combinatorics, dp, math	2100	x2486
1919F2	Wine Factory (Hard Version) data structures, dp, flows, greedy, matrices	2800	x778
1919E	Counting Prefixes combinatorics, constructive algorithms, dp, implementation, math	2600	x806
1919C	Grouping Increases data structures, dp, greedy	1400	x17676
1918D	Blocking Elements binary search, data structures, dp, implementation, two pointers	1900	x4483
1917F	Construct Tree bitmasks, constructive algorithms, dp, trees	2500	x924
1917D	Yet Another Inversions Problem combinatorics, data structures, dp, implementation, math, number theory	2300	x1709
1917B	Erase First or Second Letter brute force, combinatorics, data structures, dp, strings	1100	x20573
1916H2	Matrix Rank (Hard Version) combinatorics, dp, math, matrices, string suffix structures	2700	x512
1916H1	Matrix Rank (Easy Version) brute force, combinatorics, dp, math, matrices	2700	x594
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	x1263
1914G1	Light Bulbs (Easy Version) brute force, combinatorics, dfs and similar, dp, dsu, graphs, math, trees	2100	x1739
1914F	Programming Competition dfs and similar, dp, graph matchings, greedy, trees	1900	x3864
1914D	Three Activities brute force, dp, greedy, implementation, sortings	1200	x19640
1913D	Array Collapse data structures, divide and conquer, dp, trees	2100	x2870
1912K	Kim's Quest bitmasks, combinatorics, dp	1800	x2199
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	x114
1909F2	Small Permutation Problem (Hard Version) combinatorics, dp, math	2500	x868
1909F1	Small Permutation Problem (Easy Version) brute force, combinatorics, dp, math	2200	x1698
1906J	Count BFS Graph combinatorics, dp	2100	x690
1906H	Twin Friends combinatorics, dp	2200	x632
1906E	Merge Not Sort constructive algorithms, dp	1900	x1387
1905E	One-X combinatorics, dfs and similar, dp, math, trees	2400	x896
1904B	Collecting Game binary search, dp, greedy, sortings, two pointers	1100	x13952
1903D2	Maximum And Queries (hard version) bitmasks, divide and conquer, dp, greedy	2500	x736
1902D	Robot Queries binary search, data structures, dp, implementation	1900	x3863
1901E	Compressed Tree dfs and similar, dp, graphs, greedy, sortings, trees	2200	x1437
1901D	Yet Another Monster Fight binary search, dp, greedy, implementation, math	1700	x6493
1900E	Transitive Graph dfs and similar, dp, dsu, graphs, implementation	2100	x1912
1900D	Small GCD bitmasks, brute force, dp, math, number theory	2000	x3919
1900C	Anji's Binary Tree dfs and similar, dp, trees	1300	x10927
1900B	Laura and Operations dp, math	900	x16691
1899C	Yarik and Array dp, greedy, two pointers	1100	x19413
1896H2	Cyclic Hamming (Hard Version) brute force, dp, fft, math, number theory	3500	x98
1896H1	Cyclic Hamming (Easy Version) brute force, divide and conquer, dp, fft, math, number theory	3400	x87
1895G	Two Characters, Two Colors binary search, data structures, dp, flows, greedy	3100	x180
1895F	Fancy Arrays combinatorics, dp, math, matrices	2600	x671
1895E	Infinite Card Game binary search, brute force, data structures, dfs and similar, dp, dsu, games, graphs, greedy, sortings, two pointers	2300	x1503
1895C	Torn Lucky Ticket brute force, dp, hashing, implementation, math	1400	x10530
1893E	Cacti Symphony combinatorics, dfs and similar, dp, graphs	3500	x186
1889F	Doremy's Average Tree data structures, dp, greedy, trees	3500	x71
1889C2	Doremy's Drying Plan (Hard Version) data structures, dp	2600	x920
1889C1	Doremy's Drying Plan (Easy Version) brute force, data structures, dp, greedy, sortings	2000	x3120
1886E	I Wanna be the Team Leader bitmasks, constructive algorithms, dp, greedy, math, sortings, two pointers	2400	x1381
1884D	Counting Rhyme dp, math, number theory	2100	x3009
1884C	Medium Design brute force, data structures, dp, greedy, sortings	1700	x5749
1883C	Raspberries dp, math	1000	x24713
1882D	Tree XOR bitmasks, dfs and similar, dp, greedy, trees	1900	x5171
1881F	Minimum Maximum Distance dfs and similar, dp, graphs, shortest paths, trees	1700	x6382
1881E	Block Sequence dp	1500	x12726
1879D	Sum of XOR Functions bitmasks, combinatorics, divide and conquer, dp, math	1700	x6983
1879C	Make it Alternating combinatorics, dp, greedy	1300	x15854
1876E	Ball-Stackable constructive algorithms, data structures, dp, trees	3300	x261
1875D	Jellyfish and Mex dp	1600	x8081
1874G	Jellyfish and Inscryption dp	3500	x79
1874F	Jellyfish and OEIS dp	3500	x192
1874E	Jellyfish and Hack dp, math	3000	x293
1874D	Jellyfish and Miku divide and conquer, dp, math, probabilities	2800	x679
1874C	Jellyfish and EVA dp, graphs, greedy, math, probabilities	2300	x1555
1874B	Jellyfish and Math bitmasks, brute force, dfs and similar, dp, graphs, shortest paths	2400	x1107
1872E	Data Structures Fan binary search, bitmasks, data structures, dp	1500	x12728
1870E	Another MEX Problem bitmasks, brute force, dp, shortest paths	2300	x2272
1870C	Colorful Table binary search, data structures, dp, implementation, math, two pointers	1300	x11107
1868E	Min-Sum-Max constructive algorithms, dp, greedy	3500	x77
1868C	Travel Plan combinatorics, dp, implementation, math, trees	2400	x1108
1868B2	Candy Party (Hard Version) bitmasks, constructive algorithms, dp, greedy, implementation, math	2100	x2337
1866M	Mighty Rock Tower brute force, combinatorics, dp, math, probabilities	2400	x707
1866K	Keen Tree Calculation binary search, data structures, dp, geometry, graphs, implementation, trees	2500	x422
1866J	Jackets and Packets dp	2800	x271
1866I	Imagination Castle dp, games, two pointers	2300	x689
1866G	Grouped Carriages binary search, data structures, dp, flows, greedy	2100	x1558
1866E	Elevators of Tamem dp	2700	x282
1866D	Digital Wallet dp, greedy	2300	x1226
1866C	Completely Searching for Inversions dfs and similar, dp, graphs	1900	x2930
1864H	Asterism Stream dp, math, matrices	3200	x277
1864D	Matrix Cascade brute force, constructive algorithms, data structures, dp, greedy, math	1700	x6521
1863I	Redundant Routes constructive algorithms, dp, trees	3500	x73
1863H	Goldberg Machine 3 dp, trees	3500	x74
1863G	Swaps combinatorics, dp, graphs, math	2800	x587
1863F	Divide, XOR, and Conquer bitmasks, dp, math	2600	x1067
1863E	Speedrun brute force, dfs and similar, dp, graphs, greedy, math, sortings, two pointers	2100	x2664
1862F	Magic Will Save the World binary search, bitmasks, brute force, dp	1800	x5949
1862A	Gift Carpet dp, greedy, implementation, strings	800	x31612
1861E	Non-Intersecting Subpermutations combinatorics, dp, implementation, math	2300	x1658
1861D	Sorting By Multiplication dp, greedy	1800	x6486
1861B	Two Binary Strings constructive algorithms, dp, greedy	1000	x20781