Problemset - Codeforces

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Problems

#	Name
1910D	Remove and Add *special problem, greedy	1800	x313
1910C	Poisonous Swamp special problem, special problem, implementation, implementation	1600	x588
1910B	Security Guard *special problem, greedy	1600	x607
1910A	Username *special problem, implementation	1100	x1613
1909I	Short Permutation Problem combinatorics, dp, fft, math	1900	x80
1909H	Parallel Swaps Sort constructive algorithms, data structures	3500	x61
1909G	Pumping Lemma hashing, strings	3000	x320
1909F2	Small Permutation Problem (Hard Version) combinatorics, dp, math	2500	x839
1909F1	Small Permutation Problem (Easy Version) brute force, combinatorics, dp, math	2200	x1649
1909E	Multiple Lamps bitmasks, brute force, constructive algorithms, math, number theory	2400	x1261
1909D	Split Plus K greedy, math, number theory	1900	x4012
1909C	Heavy Intervals constructive algorithms, data structures, dsu, greedy, math, sortings	1400	x10055
1909B	Make Almost Equal With Mod bitmasks, constructive algorithms, math, number theory	1200	x14114
1909A	Distinct Buttons implementation, math	800	x15768
1907G	Lights brute force, constructive algorithms, dfs and similar, graphs, greedy, implementation	2200	x1767
1907F	Shift and Reverse greedy, sortings	1800	x4422
1907E	Good Triples brute force, combinatorics, number theory	1600	x8908
1907D	Jumping Through Segments binary search, constructive algorithms	1400	x12098
1907C	Removal of Unattractive Pairs constructive algorithms, greedy, math, strings	1200	x18561
1907B	YetnotherrokenKeoard data structures, implementation, strings	1000	x23471
1907A	Rook implementation	800	x34315
1906M	Triangle Construction greedy, math	1700	x2347
1906L	Palindromic Parentheses constructive algorithms	2500	x437
1906K	Deck-Building Game divide and conquer, math	2500	x265
1906J	Count BFS Graph combinatorics, dp	2100	x643
1906I	Contingency Plan 2 graph matchings	2900	x126
1906H	Twin Friends combinatorics, dp	2200	x614
1906G	Grid Game 2 games, number theory	2900	x147
1906F	Maximize The Value data structures, sortings	2100	x942
1906E	Merge Not Sort constructive algorithms, dp	1900	x1316
1906D	Spaceship Exploration binary search, geometry	2800	x89
1906C	Cursed Game interactive	3000	x162
1906B	Button Pressing bitmasks, constructive algorithms, hashing	2600	x457
1906A	Easy As ABC brute force	1000	x3573
1905F	Field Should Not Be Empty brute force, data structures, divide and conquer	2600	x459
1905E	One-X combinatorics, dfs and similar, dp, math, trees	2400	x857
1905D	Cyclic MEX data structures, implementation, math, two pointers	2000	x3530
1905C	Largest Subsequence greedy, strings	1400	x11110
1905B	Begginer's Zelda greedy, trees	1100	x15351
1905A	Constructive Problems constructive algorithms, math	800	x21885
1904F	Beautiful Tree data structures, dfs and similar, graphs, implementation, trees	2800	x309
1904E	Tree Queries data structures, dfs and similar, graphs, implementation, trees	2500	x832
1904D2	Set To Max (Hard Version) constructive algorithms, data structures, divide and conquer, greedy, implementation, sortings	1800	x3861
1904D1	Set To Max (Easy Version) brute force, constructive algorithms, greedy	1600	x5765
1904C	Array Game binary search, brute force, data structures, sortings, two pointers	1400	x10781
1904B	Collecting Game binary search, dp, greedy, sortings, two pointers	1100	x13008
1904A	Forked! brute force, implementation	900	x16153
1903F	Babysitting 2-sat, binary search, data structures, graphs, trees	2500	x563
1903E	Geo Game greedy, interactive, math	2000	x1815
1903D2	Maximum And Queries (hard version) bitmasks, divide and conquer, dp, greedy	2500	x712
1903D1	Maximum And Queries (easy version) binary search, bitmasks, brute force, greedy	1700	x5135
1903C	Theofanis' Nightmare constructive algorithms, greedy	1400	x10477
1903B	StORage room bitmasks, brute force, constructive algorithms, greedy	1200	x11486
1903A	Halloumi Boxes brute force, greedy, sortings	800	x24734
1902F	Trees and XOR Queries Again data structures, dfs and similar, divide and conquer, graphs, implementation, math, trees	2400	x897
1902E	Collapsing Strings data structures, strings, trees	1900	x3793
1902D	Robot Queries binary search, data structures, dp, implementation	1900	x3710
1902C	Insert and Equalize brute force, constructive algorithms, greedy, math, number theory	1300	x12374
1902B	Getting Points binary search, brute force, greedy	1100	x13396
1902A	Binary Imbalance constructive algorithms	800	x19867
1901F	Landscaping binary search, geometry, two pointers	2900	x144
1901E	Compressed Tree dfs and similar, dp, graphs, greedy, sortings, trees	2200	x1387
1901D	Yet Another Monster Fight binary search, dp, greedy, implementation, math	1700	x6239
1901C	Add, Divide and Floor constructive algorithms, greedy, math	1400	x10770
1901B	Chip and Ribbon greedy, math	1100	x14083
1901A	Line Trip greedy, math	800	x25672
1900F	Local Deletions binary search, data structures, implementation	2800	x260
1900E	Transitive Graph dfs and similar, dp, dsu, graphs, implementation	2100	x1846
1900D	Small GCD bitmasks, brute force, dp, math, number theory	2000	x3741
1900C	Anji's Binary Tree dfs and similar, dp, trees	1300	x10509
1900B	Laura and Operations dp, math	900	x16114
1900A	Cover in Water constructive algorithms, greedy, implementation, strings	800	x22301
1899G	Unusual Entertainment data structures, dfs and similar, dsu, shortest paths, sortings, trees, two pointers	1900	x2925
1899F	Alex's whims constructive algorithms, graphs, greedy, shortest paths, trees	1600	x6739
1899E	Queue Sort greedy, implementation, sortings	1300	x14015
1899D	Yarik and Musical Notes hashing, math, number theory	1300	x12326
1899C	Yarik and Array dp, greedy, two pointers	1100	x18317
1899B	250 Thousand Tons of TNT brute force, implementation, number theory	1100	x18261
1899A	Game with Integers games, math, number theory	800	x38475
1898F	Vova Escapes the Matrix brute force, dfs and similar, divide and conquer, shortest paths	2600	x739
1898E	Sofia and Strings data structures, greedy, sortings, strings, two pointers	2200	x2064
1898D	Absolute Beauty greedy, math	1900	x4771
1898C	Colorful Grid constructive algorithms	1700	x4958
1898B	Milena and Admirer greedy, math	1500	x10564
1898A	Milica and String brute force, implementation, strings	800	x15136
1896H2	Cyclic Hamming (Hard Version) brute force, dp, fft, math, number theory	3500	x89
1896H1	Cyclic Hamming (Easy Version) brute force, divide and conquer, dp, fft, math, number theory	3400	x80
1896G	Pepe Racing constructive algorithms, implementation, interactive, sortings	3200	x309
1896F	Bracket Xoring constructive algorithms, greedy, implementation, math	2600	x657
1896E	Permutation Sorting data structures, sortings	2100	x2035
1896D	Ones and Twos binary search, data structures, divide and conquer, math, two pointers	1700	x5229
1896C	Matching Arrays binary search, constructive algorithms, greedy, sortings	1400	x8693
1896B	AB Flipping greedy, strings, two pointers	900	x13502
1896A	Jagged Swaps sortings	800	x19080
1895G	Two Characters, Two Colors binary search, data structures, dp, flows, greedy	3100	x173
1895F	Fancy Arrays combinatorics, dp, math, matrices	2600	x635
1895E	Infinite Card Game binary search, brute force, data structures, dfs and similar, dp, dsu, games, graphs, greedy, sortings, two pointers	2300	x1461
1895D	XOR Construction bitmasks, constructive algorithms, data structures, math, string suffix structures, trees	1900	x5600
1895C	Torn Lucky Ticket brute force, dp, hashing, implementation, math	1400	x10162
1895B	Points and Minimum Distance greedy, math, sortings	800	x19687