Problemset - Codeforces

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Codeforces Round (Div. 3)
4 days

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Problems

#	Name
1791B	Following Directions geometry, implementation	800	x42829
1791A	Codeforces Checking implementation, strings	800	x57276
1790C	Premutation brute force, implementation, math	1000	x23341
1790A	Polycarp and the Day of Pi implementation, math, strings	800	x36228
1789F	Serval and Brain Power bitmasks, brute force, dp, greedy, implementation, strings	2700	x531
1789E	Serval and Music Game brute force, dp, implementation, math, number theory	2500	x781
1789D	Serval and Shift-Shift-Shift bitmasks, brute force, constructive algorithms, implementation	2200	x1614
1789C	Serval and Toxel's Arrays combinatorics, dp, implementation, math	1500	x8275
1789B	Serval and Inversion Magic brute force, implementation, strings, two pointers	800	x15957
1788F	XOR, Tree, and Queries bitmasks, constructive algorithms, dfs and similar, dsu, graphs, greedy, implementation, trees	2500	x809
1788B	Sum of Two Numbers constructive algorithms, greedy, implementation, math, probabilities	1100	x19585
1788A	One and Two brute force, implementation, math	800	x28656
1787F	Inverse Transformation constructive algorithms, implementation, math	2500	x641
1787D	Game on Axis combinatorics, dfs and similar, dsu, graphs, implementation	1900	x3327
1786A2	Alternating Deck (hard version) implementation	800	x11294
1786A1	Non-alternating Deck (easy version) implementation	800	x13685
1783G	Weighed Tree Radius data structures, divide and conquer, implementation, trees	2800	x423
1783D	Different Arrays brute force, dp, implementation	2000	x4280
1781E	Rectangle Shrinking binary search, brute force, data structures, greedy, implementation, two pointers	2300	x1282
1781C	Equal Frequencies brute force, constructive algorithms, greedy, implementation, sortings, strings	1600	x7288
1778A	Flip Flop Sum greedy, implementation	800	x23925
1775E	The Human Equation greedy, implementation	2100	x3092
1775A1	Gardener and the Capybaras (easy version) brute force, constructive algorithms, implementation	800	x19437
1774F2	Magician and Pigs (Hard Version) binary search, brute force, data structures, implementation	2700	x653
1774F1	Magician and Pigs (Easy Version) brute force, data structures, implementation	2400	x1033
1774D	Same Count One brute force, constructive algorithms, greedy, implementation, two pointers	1600	x7622
1773I	Interactive Factorial Guessing brute force, games, implementation, interactive	2500	x463
1773B	BinCoin binary search, divide and conquer, hashing, implementation, probabilities, trees	2200	x743
1772G	Gaining Rating binary search, greedy, implementation, math, sortings, two pointers	2200	x1297
1772F	Copy of a Copy of a Copy constructive algorithms, dfs and similar, graphs, implementation, sortings	2000	x2284
1772B	Matrix Rotation brute force, implementation	800	x28599
1772A	A+B? implementation	800	x45477
1771E	Hossam and a Letter brute force, dp, implementation, two pointers	2500	x670
1770D	Koxia and Game constructive algorithms, data structures, dfs and similar, dsu, flows, games, graph matchings, graphs, implementation	2000	x3732
1769B1	Копирование файлов I *special problem, brute force, implementation, math	1000	x1324
1768C	Elemental Decompress constructive algorithms, greedy, implementation, sortings	1300	x13781
1767A	Cut the Triangle implementation	800	x20306
1766C	Hamiltonian Wall dp, implementation	1300	x13324
1766B	Notepad# implementation	1000	x20605
1766A	Extremely Round brute force, implementation	800	x24923
1765L	Project Manager brute force, data structures, implementation	2400	x569
1765I	Infinite Chess implementation, shortest paths	2800	x184
1765H	Hospital Queue binary search, graphs, greedy, implementation	2200	x1207
1763D	Valid Bitonic Permutations combinatorics, dp, implementation, math, number theory	2200	x1990
1763B	Incinerate binary search, brute force, data structures, implementation, math, sortings	1200	x14293
1762B	Make Array Good constructive algorithms, implementation, number theory, sortings	1100	x16626
1761B	Elimination of a Ring constructive algorithms, greedy, implementation	1000	x13179
1760D	Challenging Valleys implementation, two pointers	1000	x22977
1760C	Advantage data structures, implementation, sortings	800	x35901
1760B	Atilla's Favorite Problem greedy, implementation, strings	800	x42910
1760A	Medium Number implementation, sortings	800	x55951
1759A	Yes-Yes? implementation, strings	800	x29336
1750C	Complementary XOR constructive algorithms, implementation	1400	x9392
1750B	Maximum Substring brute force, greedy, implementation	800	x16111
1750A	Indirect Sort constructive algorithms, implementation, math	800	x16925
1749C	Number Game binary search, data structures, games, greedy, implementation	1400	x13648
1749A	Cowardly Rooks greedy, implementation	800	x22168
1748C	Zero-Sum Prefixes brute force, data structures, dp, greedy, implementation	1600	x10765
1748B	Diverse Substrings brute force, implementation, strings	1400	x14734
1746G	Olympiad Training binary search, data structures, dp, flows, geometry, implementation, sortings	3500	x91
1746C	Permutation Operations constructive algorithms, greedy, implementation, math	1300	x12590
1744C	Traffic Light binary search, implementation, two pointers	1000	x25545
1744B	Even-Odd Increments implementation, math	800	x23166
1744A	Number Replacement greedy, implementation	800	x26753
1743A	Password brute force, combinatorics, implementation, math	800	x26422
1742C	Stripes implementation	900	x31847
1742B	Increasing greedy, implementation, sortings	800	x45793
1742A	Sum implementation	800	x67449
1741A	Compare T-Shirt Sizes implementation, implementation, strings	800	x30261
1739A	Immobile Knight implementation	800	x22452
1738A	Glory Addicts greedy, implementation, sortings	800	x13443
1737D	Ela and the Wiring Wizard brute force, dp, graphs, greedy, implementation, shortest paths	2200	x1822
1737C	Ela and Crickets constructive algorithms, games, implementation, math	1500	x5639
1737B	Ela's Fitness and the Luxury Number binary search, implementation, math	1300	x9273
1737A	Ela Sorting Books greedy, implementation, strings	900	x10018
1736D	Equal Binary Subsequences constructive algorithms, geometry, greedy, implementation, strings	2200	x2423
1735C	Phase Shift dfs and similar, dsu, graphs, greedy, implementation, strings	1400	x9702
1732D1	Balance (Easy version) brute force, data structures, implementation, number theory	1500	x8463
1732C2	Sheikh (Hard Version) binary search, bitmasks, brute force, greedy, implementation, two pointers	2100	x2493
1732B	Ugu brute force, dp, greedy, implementation	900	x14624
1732A	Bestie brute force, combinatorics, constructive algorithms, implementation, math, number theory	1000	x14651
1730B	Meeting on the Line binary search, geometry, greedy, implementation, math, ternary search	1600	x12221
1728A	Colored Balls: Revisited brute force, greedy, implementation, sortings	800	x24463
1726H	Mainak and the Bleeding Polygon binary search, geometry, implementation, math	3500	x82
1722F	L-shapes dfs and similar, implementation	1700	x6696
1722E	Counting Rectangles brute force, data structures, dp, implementation	1600	x10367
1722C	Word Game data structures, implementation	800	x30070
1722B	Colourblindness implementation	800	x44289
1722A	Spell Check implementation	800	x48428
1721B	Deadly Laser implementation	1000	x21749
1721A	Image greedy, implementation	800	x26773
1720E	Misha and Paintings constructive algorithms, data structures, greedy, implementation, math	2700	x751
1720C	Corners greedy, implementation	1200	x16508
1719C	Fighting Tournament binary search, data structures, implementation, two pointers	1400	x13011
1718E	Impressionism constructive algorithms, graphs, implementation, math	3500	x105
1718B	Fibonacci Strings greedy, implementation, math, number theory	2000	x2922
1717F	Madoka and The First Session constructive algorithms, flows, graph matchings, graphs, implementation	2500	x521
1717B	Madoka and Underground Competitions constructive algorithms, implementation	1100	x14580
1716C	Robot in a Hallway data structures, dp, greedy, implementation, ternary search	2000	x4085
1715C	Monoblock combinatorics, data structures, implementation, math	1700	x8468