Problemset - Codeforces

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Codeforces Round (Div. 1 + Div. 2)
2 weeks

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Problems

#	Name
1854B	Earn or Unlock bitmasks, brute force, dp	2200	x4451
1854A2	Dual (Hard Version) constructive algorithms, math	1900	x8143
1854A1	Dual (Easy Version) constructive algorithms, math	1400	x16258
1853B	Fibonaccharsis binary search, brute force, math	1200	x20135
1853A	Desorting brute force, greedy, math	800	x62690
1852F	Panda Meetups data structures, dp, flows	3500	x152
1852E	Rivalries constructive algorithms, data structures, greedy	3400	x251
1852D	Miriany and Matchstick constructive algorithms, dp, greedy	2800	x681
1852C	Ina of the Mountain data structures, dp, greedy, math	2400	x2192
1852B	Imbalanced Arrays constructive algorithms, graphs, greedy, math, sortings, two pointers	1800	x5592
1852A	Ntarsis' Set binary search, math, number theory	1800	x9425
1851G	Vlad and the Mountains binary search, data structures, dsu, graphs, implementation, sortings, trees, two pointers	2000	x4284
1851F	Lisa and the Martians bitmasks, greedy, math, strings, trees	1800	x7892
1851E	Nastya and Potions dfs and similar, dp, graphs, sortings	1500	x13787
1851D	Prefix Permutation Sums implementation, math	1300	x17649
1851C	Tiles Comeback greedy	1000	x26279
1851B	Parity Sort greedy, sortings, two pointers	800	x33153
1851A	Escalator Conversations brute force, constructive algorithms, math	800	x31847
1850H	The Third Letter dfs and similar, dsu, graphs, greedy, implementation	1700	x10339
1850G	The Morning Star combinatorics, data structures, geometry, implementation, math, sortings	1500	x15958
1850F	We Were Both Children brute force, implementation, math, number theory	1300	x25789
1850E	Cardboard for Pictures binary search, geometry, implementation, math	1100	x38452
1850D	Balanced Round brute force, greedy, implementation, sortings	900	x67422
1850C	Word on the Paper implementation, strings	800	x55375
1850B	Ten Words of Wisdom implementation, sortings	800	x51746
1850A	To My Critics implementation, sortings	800	x77497
1849F	XOR Partition binary search, bitmasks, data structures, divide and conquer, greedy, trees	2700	x925
1849E	Max to the Right of Min binary search, data structures, divide and conquer, dp, dsu, two pointers	2300	x2339
1849D	Array Painting constructive algorithms, greedy, two pointers	1700	x10612
1849C	Binary String Copying binary search, brute force, data structures, hashing, strings	1600	x12840
1849B	Monsters greedy, math, sortings	1000	x49712
1849A	Morning Sandwich implementation, math	800	x32525
1848F	Vika and Wiki binary search, bitmasks, combinatorics, divide and conquer, dp, math	2400	x2166
1848E	Vika and Stone Skipping brute force, implementation, math, number theory	2600	x994
1848D	Vika and Bonuses binary search, brute force, math, ternary search	2200	x3052
1848C	Vika and Price Tags math, number theory	1800	x7308
1848B	Vika and the Bridge binary search, data structures, greedy, implementation, math, sortings	1200	x27163
1848A	Vika and Her Friends games, math	900	x18589
1847F	The Boss's Identity binary search, bitmasks, data structures, dfs and similar, greedy, math, sortings	2500	x1122
1847E	Triangle Platinum? brute force, combinatorics, implementation, interactive, math, probabilities	2900	x439
1847D	Professor Higashikata data structures, dsu, greedy, implementation, strings	1900	x4349
1847C	Vampiric Powers, anyone? bitmasks, brute force, dp, greedy	1400	x15085
1847B	Hamon Odyssey bitmasks, greedy, two pointers	1000	x22679
1847A	The Man who became a God greedy, sortings	800	x22989
1846G	Rudolf and CodeVid-23 bitmasks, dp, graphs, greedy, shortest paths	1900	x6181
1846F	Rudolph and Mimic constructive algorithms, implementation, interactive	1800	x3895
1846E2	Rudolf and Snowflakes (hard version) binary search, brute force, implementation, math	1800	x8936
1846E1	Rudolf and Snowflakes (simple version) brute force, implementation, math	1300	x27542
1846D	Rudolph and Christmas Tree constructive algorithms, geometry, math	1200	x23114
1846C	Rudolf and the Another Competition constructive algorithms, data structures, dp, greedy, sortings	1200	x21929
1846B	Rudolph and Tic-Tac-Toe brute force, implementation, strings	800	x29189
1846A	Rudolph and Cut the Rope implementation, math	800	x35116
1845F	Swimmers in the Pool dp, fft, math, number theory	2800	x505
1845E	Boxes and Balls dp, implementation, math	2500	x1739
1845D	Rating System binary search, brute force, data structures, dp, dsu, greedy, math, two pointers	1800	x9420
1845C	Strong Password binary search, dp, greedy, strings	1400	x17310
1845B	Come Together geometry, implementation, math	900	x24126
1845A	Forbidden Integer constructive algorithms, implementation, math, number theory	800	x53474
1844H	Multiple of Three Cycles combinatorics, data structures, dp, dsu, math	3400	x314
1844G	Tree Weights bitmasks, constructive algorithms, data structures, dfs and similar, implementation, math, matrices, number theory, trees	3000	x1285
1844F2	Min Cost Permutation (Hard Version) binary search, constructive algorithms, data structures, greedy, math, sortings	2800	x521
1844F1	Min Cost Permutation (Easy Version) brute force, constructive algorithms, greedy, math	2600	x950
1844E	Great Grids 2-sat, constructive algorithms, dfs and similar, dsu, graphs	2400	x2222
1844D	Row Major constructive algorithms, greedy, math, number theory, strings	1400	x14029
1844C	Particles dp, greedy, implementation, math	1300	x18174
1844B	Permutations & Primes constructive algorithms, math	1000	x20465
1844A	Subtraction Game constructive algorithms, games	800	x26094
1843F2	Omsk Metro (hard version) data structures, dfs and similar, divide and conquer, dp, math, trees	2300	x2284
1843F1	Omsk Metro (simple version) data structures, dfs and similar, dp, graphs, greedy, math, trees	1800	x6544
1843E	Tracking Segments binary search, brute force, data structures, two pointers	1600	x19362
1843D	Apple Tree combinatorics, dfs and similar, dp, math, trees	1200	x22608
1843C	Sum in Binary Tree bitmasks, combinatorics, math, trees	800	x40782
1843B	Long Long greedy, math, two pointers	800	x32661
1843A	Sasha and Array Coloring greedy, sortings, two pointers	800	x37865
1842I	Tenzing and Necklace divide and conquer, dp, greedy	3500	x177
1842H	Tenzing and Random Real Numbers bitmasks, dp, graphs, math, probabilities	3000	x1154
1842G	Tenzing and Random Operations combinatorics, dp, math, probabilities	2800	x1804
1842F	Tenzing and Tree dfs and similar, greedy, shortest paths, sortings, trees	2500	x1954
1842E	Tenzing and Triangle data structures, dp, geometry, greedy, math	2300	x1918
1842D	Tenzing and His Animal Friends constructive algorithms, graphs, greedy	1900	x4881
1842C	Tenzing and Balls dp	1500	x17255
1842B	Tenzing and Books bitmasks, greedy, math	1100	x28304
1842A	Tenzing and Tsondu games, math	800	x20990
1841F	Monocarp and a Strategic Game geometry, sortings, two pointers	2700	x650
1841E	Fill the Matrix data structures, greedy, math	2200	x2518
1841D	Pairs of Segments data structures, greedy, sortings, two pointers	2000	x5438
1841C	Ranom Numbers brute force, dp, greedy, math, strings	1800	x9305
1841B	Keep it Beautiful implementation	1000	x24487
1841A	Game with Board constructive algorithms, games	800	x26196
1840G2	In Search of Truth (Hard Version) constructive algorithms, interactive, math, meet-in-the-middle, probabilities	2500	x1231
1840G1	In Search of Truth (Easy Version) constructive algorithms, interactive, math, meet-in-the-middle, probabilities	2200	x2886
1840F	Railguns brute force, dfs and similar, dp, graphs	2200	x2175
1840E	Character Blocking data structures, hashing, implementation	1600	x9632
1840D	Wooden Toy Festival binary search, greedy, sortings	1400	x16810
1840C	Ski Resort combinatorics, math, two pointers	1000	x53352
1840B	Binary Cafe bitmasks, combinatorics, math	1100	x25149
1840A	Cipher Shifer implementation, strings, two pointers	800	x39152
1839E	Decreasing Game constructive algorithms, dfs and similar, dp, greedy, interactive	2400	x1613
1839D	Ball Sorting data structures, dp, sortings	2100	x2778
1839C	Insert Zero and Invert Prefix constructive algorithms	1300	x13637

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