Problemset - Codeforces

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Before contest
Codeforces Round 975 (Div. 1)
3 days

Before contest
Codeforces Round 975 (Div. 2)
3 days

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Difficulty: —

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Problems

#	Name
2004D	Colored Portals binary search, brute force, data structures, graphs, greedy, implementation, shortest paths	1600	x9876
1996E	Decode combinatorics, data structures, implementation, math	1600	x8986
1994C	Hungry Games binary search, dp, two pointers	1600	x10109
1985G	D-Function combinatorics, math, number theory	1600	x8927
1980E	Permutation of Rows and Columns constructive algorithms, data structures, greedy, hashing, implementation, math, matrices, sortings	1600	x10091
1978D	Elections data structures, greedy, implementation, math	1600	x10823
1976C	Job Interview binary search, dp, greedy, implementation, two pointers	1600	x10003
1971F	Circle Perimeter binary search, brute force, dfs and similar, geometry, implementation, math	1600	x9612
1968E	Cells Arrangement constructive algorithms	1600	x10110
1958D	Staircase *special problem	1600	x492
1957C	How Does the Rook Move? combinatorics, dp, math	1600	x9395
1956C	Nene's Magical Matrix constructive algorithms, greedy, math	1600	x12609
1946C	Tree Cutting binary search, dp, greedy, implementation, trees	1600	x10632
1941E	Rudolf and k Bridges binary search, data structures, dp, two pointers	1600	x9487
1938H	Pho Restaurant	1600	x2111
1932E	Final Countdown implementation, math, number theory	1600	x7991
1928C	Physical Education Lesson brute force, math, number theory	1600	x8388
1921E	Eat the Chip brute force, games, greedy, math	1600	x9683
1920C	Partitioning the Array brute force, math, number theory	1600	x13318
1917C	Watering an Array brute force, greedy, implementation, math	1600	x10305
1910C	Poisonous Swamp special problem, special problem, implementation, implementation	1600	x625
1910B	Security Guard *special problem, greedy	1600	x668
1907E	Good Triples brute force, combinatorics, number theory	1600	x10091
1904D1	Set To Max (Easy Version) brute force, constructive algorithms, greedy	1600	x6615
1899F	Alex's whims constructive algorithms, graphs, greedy, shortest paths, trees	1600	x7528
1886C	Decreasing String implementation, strings	1600	x11399
1878D	Reverse Madness data structures, greedy	1600	x8269
1875D	Jellyfish and Mex dp	1600	x8584
1862E	Kolya and Movie Theatre constructive algorithms, data structures, greedy	1600	x10648
1861C	Queries for the Array data structures, dfs and similar, implementation, strings, trees	1600	x10064
1857F	Sum and Product binary search, data structures, math	1600	x11448
1856C	To Become Max binary search, brute force, data structures, dp	1600	x12253
1849C	Binary String Copying binary search, brute force, data structures, hashing, strings	1600	x10470
1843E	Tracking Segments binary search, brute force, data structures, two pointers	1600	x12247
1840E	Character Blocking data structures, hashing, implementation	1600	x8005
1833E	Round Dance dfs and similar, dsu, graphs, shortest paths	1600	x11659
1829G	Hits Different data structures, dp, implementation, math	1600	x10360
1822E	Making Anti-Palindromes greedy, math, strings	1600	x10394
1811D	Umka and a Long Flight constructive algorithms, implementation, math	1600	x7465
1806C	Sequence Master brute force, constructive algorithms, math	1600	x7580
1801A	The Very Beautiful Blanket bitmasks, constructive algorithms	1600	x8536
1798D	Shocking Arrangement constructive algorithms, greedy, math	1600	x9793
1797C	Li Hua and Chess constructive algorithms, greedy, interactive	1600	x7607
1796C	Maximum Set binary search, math	1600	x10372
1795D	Triangle Coloring combinatorics, math	1600	x9087
1787C	Remove the Bracket dp, greedy, math	1600	x7050
1781C	Equal Frequencies brute force, constructive algorithms, greedy, implementation, sortings, strings	1600	x7564
1779C	Least Prefix Sum data structures, greedy	1600	x12353
1778C	Flexible String bitmasks, brute force, strings	1600	x8181
1775C	Interesting Sequence bitmasks, math	1600	x10397
1774D	Same Count One brute force, constructive algorithms, greedy, implementation, two pointers	1600	x7833
1771C	Hossam and Trainees greedy, math, number theory	1600	x9639
1766D	Lucky Chains math, number theory	1600	x8863
1753B	Factorial Divisibility math, number theory	1600	x12713
1748C	Zero-Sum Prefixes brute force, data structures, dp, greedy, implementation	1600	x11068
1741E	Sending a Sequence Over the Network dp	1600	x12151
1730B	Meeting on the Line binary search, geometry, greedy, implementation, math, ternary search	1600	x12596
1722E	Counting Rectangles brute force, data structures, dp, implementation	1600	x10760
1714D	Color with Occurrences brute force, data structures, dp, greedy, strings	1600	x9047
1707A	Doremy's IQ binary search, constructive algorithms, greedy, implementation	1600	x13518
1703G	Good Key, Bad Key bitmasks, brute force, dp, greedy, math	1600	x10600
1702E	Split Into Two Sets dfs and similar, dsu, graphs	1600	x13240
1698D	Fixed Point Guessing binary search, constructive algorithms, interactive	1600	x9255
1689C	Infected Tree dfs and similar, dp, trees	1600	x11173
1687A	The Enchanted Forest brute force, greedy	1600	x10348
1680C	Binary String binary search, greedy, strings, two pointers	1600	x9897
1677A	Tokitsukaze and Strange Inequality brute force, data structures, dp	1600	x8407
1671D	Insert a Progression brute force, constructive algorithms, greedy	1600	x7632
1665C	Tree Infection binary search, greedy, sortings, trees	1600	x8347
1660E	Matrix and Shifts brute force, constructive algorithms, greedy, implementation	1600	x7285
1660D	Maximum Product Strikes Back brute force, implementation, math, two pointers	1600	x8636
1658D1	388535 (Easy Version) bitmasks, math	1600	x9045
1633D	Make Them Equal dp, greedy	1600	x13991
1632C	Strange Test binary search, bitmasks, brute force, dp, math	1600	x12699
1623C	Balanced Stone Heaps binary search, greedy	1600	x12087
1622C	Set or Decrease binary search, brute force, greedy, sortings	1600	x13035
1615C	Menorah brute force, graphs, greedy, math	1600	x8358
1612D	X-Magic Pair math, number theory	1600	x9124
1610C	Keshi Is Throwing a Party binary search, greedy	1600	x11513
1609D	Social Network dsu, graphs, greedy, implementation, trees	1600	x7285
1607E	Robot on the Board 1 implementation	1600	x9302
1603B	Moderate Modular Mode constructive algorithms, math, number theory	1600	x13511
1593E	Gardener and Tree brute force, data structures, dfs and similar, greedy, implementation, trees	1600	x12349
1582D	Vupsen, Pupsen and 0 constructive algorithms, math	1600	x10482
1567C	Carrying Conundrum bitmasks, combinatorics, dp, math	1600	x12156
1566D2	Seating Arrangements (hard version) data structures, greedy, implementation, sortings, two pointers	1600	x7840
1555D	Say No to Palindromes brute force, constructive algorithms, dp, strings	1600	x12337
1542C	Strange Function math, number theory	1600	x14148
1539D	PriceFixed binary search, greedy, implementation, sortings, two pointers	1600	x11620
1537E1	Erase and Extend (Easy Version) binary search, brute force, dp, greedy, hashing, implementation, string suffix structures, strings, two pointers	1600	x12894
1530D	Secret Santa constructive algorithms, flows, graphs, greedy, math	1600	x9172
1528A	Parsa's Humongous Tree dfs and similar, divide and conquer, dp, greedy, trees	1600	x14643
1527C	Sequence Pair Weight hashing, implementation, math	1600	x13502
1526C2	Potions (Hard Version) data structures, greedy	1600	x22506
1523C	Compression and Expansion brute force, data structures, greedy, implementation, trees	1600	x8743
1520F1	Guess the K-th Zero (Easy version) binary search, interactive	1600	x11671
1519D	Maximum Sum of Products brute force, dp, implementation, math, two pointers	1600	x15186
1514C	Product 1 Modulo N greedy, number theory	1600	x15043
1513C	Add One dp, matrices	1600	x13956
1512E	Permutation by Sum brute force, greedy, math	1600	x10441

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