Problemset - Codeforces

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Codeforces Round (Div. 2)
6 days

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Problems

#	Name
1905F	Field Should Not Be Empty brute force, data structures, divide and conquer	2600	x481
1905E	One-X combinatorics, dfs and similar, dp, math, trees	2400	x885
1905D	Cyclic MEX data structures, implementation, math, two pointers	2000	x3611
1905C	Largest Subsequence greedy, strings	1400	x11431
1905B	Begginer's Zelda greedy, trees	1100	x15661
1905A	Constructive Problems constructive algorithms, math	800	x22252
1904F	Beautiful Tree data structures, dfs and similar, graphs, implementation, trees	2800	x319
1904E	Tree Queries data structures, dfs and similar, graphs, implementation, trees	2500	x863
1904D2	Set To Max (Hard Version) constructive algorithms, data structures, divide and conquer, greedy, implementation, sortings	1800	x4023
1904D1	Set To Max (Easy Version) brute force, constructive algorithms, greedy	1600	x6073
1904C	Array Game binary search, brute force, data structures, sortings, two pointers	1400	x11371
1904B	Collecting Game binary search, dp, greedy, sortings, two pointers	1100	x13759
1904A	Forked! brute force, implementation	900	x17302
1903F	Babysitting 2-sat, binary search, data structures, graphs, trees	2500	x579
1903E	Geo Game greedy, interactive, math	2000	x1868
1903D2	Maximum And Queries (hard version) bitmasks, divide and conquer, dp, greedy	2500	x730
1903D1	Maximum And Queries (easy version) binary search, bitmasks, brute force, greedy	1700	x5296
1903C	Theofanis' Nightmare constructive algorithms, greedy	1400	x10887
1903B	StORage room bitmasks, brute force, constructive algorithms, greedy	1200	x11893
1903A	Halloumi Boxes brute force, greedy, sortings	800	x26753
1902F	Trees and XOR Queries Again data structures, dfs and similar, divide and conquer, graphs, implementation, math, trees	2400	x929
1902E	Collapsing Strings data structures, strings, trees	1900	x4009
1902D	Robot Queries binary search, data structures, dp, implementation	1900	x3808
1902C	Insert and Equalize brute force, constructive algorithms, greedy, math, number theory	1300	x12810
1902B	Getting Points binary search, brute force, greedy	1100	x13732
1902A	Binary Imbalance constructive algorithms	800	x20205
1901F	Landscaping binary search, geometry, two pointers	2900	x147
1901E	Compressed Tree dfs and similar, dp, graphs, greedy, sortings, trees	2200	x1422
1901D	Yet Another Monster Fight binary search, dp, greedy, implementation, math	1700	x6431
1901C	Add, Divide and Floor constructive algorithms, greedy, math	1400	x11133
1901B	Chip and Ribbon greedy, math	1100	x14374
1901A	Line Trip greedy, math	800	x27251
1900F	Local Deletions binary search, data structures, implementation	2800	x268
1900E	Transitive Graph dfs and similar, dp, dsu, graphs, implementation	2100	x1887
1900D	Small GCD bitmasks, brute force, dp, math, number theory	2000	x3869
1900C	Anji's Binary Tree dfs and similar, dp, trees	1300	x10819
1900B	Laura and Operations dp, math	900	x16552
1900A	Cover in Water constructive algorithms, greedy, implementation, strings	800	x23676
1899G	Unusual Entertainment data structures, dfs and similar, dsu, shortest paths, sortings, trees, two pointers	1900	x2994
1899F	Alex's whims constructive algorithms, graphs, greedy, shortest paths, trees	1600	x6988
1899E	Queue Sort greedy, implementation, sortings	1300	x14466
1899D	Yarik and Musical Notes hashing, math, number theory	1300	x12706
1899C	Yarik and Array dp, greedy, two pointers	1100	x19144
1899B	250 Thousand Tons of TNT brute force, implementation, number theory	1100	x18989
1899A	Game with Integers games, math, number theory	800	x40442
1898F	Vova Escapes the Matrix brute force, dfs and similar, divide and conquer, shortest paths	2600	x753
1898E	Sofia and Strings data structures, greedy, sortings, strings, two pointers	2200	x2124
1898D	Absolute Beauty greedy, math	1900	x4910
1898C	Colorful Grid constructive algorithms	1700	x5121
1898B	Milena and Admirer greedy, math	1500	x10955
1898A	Milica and String brute force, implementation, strings	800	x15406
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
1896G	Pepe Racing constructive algorithms, implementation, interactive, sortings	3200	x318
1896F	Bracket Xoring constructive algorithms, greedy, implementation, math	2600	x670
1896E	Permutation Sorting data structures, sortings	2100	x2082
1896D	Ones and Twos binary search, data structures, divide and conquer, math, two pointers	1700	x5390
1896C	Matching Arrays binary search, constructive algorithms, greedy, sortings	1400	x9000
1896B	AB Flipping greedy, strings, two pointers	900	x13932
1896A	Jagged Swaps sortings	800	x20361
1895G	Two Characters, Two Colors binary search, data structures, dp, flows, greedy	3100	x180
1895F	Fancy Arrays combinatorics, dp, math, matrices	2600	x660
1895E	Infinite Card Game binary search, brute force, data structures, dfs and similar, dp, dsu, games, graphs, greedy, sortings, two pointers	2300	x1496
1895D	XOR Construction bitmasks, constructive algorithms, data structures, math, string suffix structures, trees	1900	x5722
1895C	Torn Lucky Ticket brute force, dp, hashing, implementation, math	1400	x10442
1895B	Points and Minimum Distance greedy, math, sortings	800	x19970
1895A	Treasure Chest math	800	x23825
1894B	Two Out of Three constructive algorithms	1000	x15140
1894A	Secret Sport implementation, strings	800	x18419
1893E	Cacti Symphony combinatorics, dfs and similar, dp, graphs	3500	x184
1893D	Colorful Constructive constructive algorithms, data structures, greedy	2600	x841
1893C	Freedom of Choice brute force, greedy, implementation	2000	x2510
1893B	Neutral Tonality constructive algorithms, greedy, sortings, two pointers	1700	x8315
1893A	Anonymous Informant brute force, dfs and similar, graphs, implementation	1400	x11640
1891F	A Growing Tree data structures, dfs and similar, trees	2000	x3483
1891E	Brukhovich and Exams brute force, greedy, implementation, math, sortings	2500	x792
1891D	Suspicious logarithms binary search, brute force, math	1900	x3797
1891C	Smilo and Monsters binary search, constructive algorithms, greedy, sortings, two pointers	1500	x11968
1891B	Deja Vu brute force, math, sortings	1100	x16565
1891A	Sorting with Twos constructive algorithms, sortings	800	x18725
1890B	Qingshan Loves Strings constructive algorithms, implementation	800	x16974
1890A	Doremy's Paint 3 constructive algorithms	800	x23393
1889F	Doremy's Average Tree data structures, dp, greedy, trees	3500	x70
1889E	Doremy's Swapping Trees dfs and similar, graphs, trees	3500	x103
1889D	Game of Stacks brute force, dfs and similar, graphs, implementation, trees	3000	x540
1889C2	Doremy's Drying Plan (Hard Version) data structures, dp	2600	x915
1889C1	Doremy's Drying Plan (Easy Version) brute force, data structures, dp, greedy, sortings	2000	x3099
1889B	Doremy's Connecting Plan constructive algorithms, greedy, math, sortings	1700	x6967
1889A	Qingshan Loves Strings 2 constructive algorithms, greedy, implementation	1300	x12433
1887F	Minimum Segments constructive algorithms	3400	x120
1887E	Good Colorings binary search, constructive algorithms, graphs, interactive	3100	x342
1887D	Split binary search, data structures, divide and conquer, dsu, math, trees, two pointers	2700	x838
1887C	Minimum Array binary search, brute force, constructive algorithms, data structures, greedy, hashing, two pointers	2400	x1619
1887B	Time Travel binary search, graphs, shortest paths	1900	x2773
1886F	Diamond Theft data structures, greedy	3300	x162
1886E	I Wanna be the Team Leader bitmasks, constructive algorithms, dp, greedy, math, sortings, two pointers	2400	x1371
1886D	Monocarp and the Set combinatorics, data structures, math	2100	x3400
1886C	Decreasing String implementation, strings	1600	x10675
1886B	Fear of the Dark binary search, geometry, math	1200	x15535
1886A	Sum of Three brute force, constructive algorithms, math	800	x25043