Problemset - Codeforces

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Codeforces Round (Div. 2)
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Problems

#	Name
1851F	Lisa and the Martians bitmasks, greedy, math, strings, trees	1800	x5509
1851E	Nastya and Potions dfs and similar, dp, graphs, sortings	1500	x9778
1851D	Prefix Permutation Sums implementation, math	1300	x14684
1851C	Tiles Comeback greedy	1000	x22726
1851B	Parity Sort greedy, sortings, two pointers	800	x28633
1851A	Escalator Conversations brute force, constructive algorithms, math	800	x29032
1850H	The Third Letter dfs and similar, dsu, graphs, greedy, implementation	1700	x7792
1850G	The Morning Star combinatorics, data structures, geometry, implementation, math, sortings	1500	x11670
1850F	We Were Both Children brute force, implementation, math, number theory	1300	x17944
1850E	Cardboard for Pictures binary search, geometry, implementation, math	1100	x21716
1850D	Balanced Round brute force, greedy, implementation, sortings	900	x34023
1850C	Word on the Paper implementation, strings	800	x42360
1850B	Ten Words of Wisdom implementation, sortings	800	x41432
1850A	To My Critics implementation, sortings	800	x53043
1849F	XOR Partition binary search, bitmasks, data structures, divide and conquer, greedy, trees	2700	x680
1849E	Max to the Right of Min binary search, data structures, divide and conquer, dp, dsu, two pointers	2300	x1557
1849D	Array Painting constructive algorithms, greedy, two pointers	1700	x8064
1849C	Binary String Copying binary search, brute force, data structures, hashing, strings	1600	x10100
1849B	Monsters greedy, math, sortings	1000	x23836
1849A	Morning Sandwich implementation, math	800	x27391
1848F	Vika and Wiki binary search, bitmasks, combinatorics, divide and conquer, dp, math	2400	x1488
1848E	Vika and Stone Skipping brute force, implementation, math, number theory	2600	x758
1848D	Vika and Bonuses binary search, brute force, math, ternary search	2200	x2546
1848C	Vika and Price Tags math, number theory	1800	x6105
1848B	Vika and the Bridge binary search, data structures, greedy, implementation, math, sortings	1200	x13972
1848A	Vika and Her Friends games, math	900	x16472
1847F	The Boss's Identity binary search, bitmasks, data structures, dfs and similar, greedy, math, sortings	2500	x865
1847E	Triangle Platinum? brute force, combinatorics, implementation, interactive, math, probabilities	2900	x321
1847D	Professor Higashikata data structures, dsu, greedy, implementation, strings	1900	x3655
1847C	Vampiric Powers, anyone? bitmasks, brute force, dp, greedy	1400	x12465
1847B	Hamon Odyssey bitmasks, greedy, two pointers	1000	x19494
1847A	The Man who became a God greedy, sortings	800	x21827
1846G	Rudolf and CodeVid-23 bitmasks, dp, graphs, greedy, shortest paths	1900	x4186
1846F	Rudolph and Mimic constructive algorithms, implementation, interactive	1800	x2971
1846E2	Rudolf and Snowflakes (hard version) binary search, brute force, implementation, math	1800	x6743
1846E1	Rudolf and Snowflakes (simple version) brute force, implementation, math	1300	x15919
1846D	Rudolph and Christmas Tree constructive algorithms, geometry, math	1200	x18721
1846C	Rudolf and the Another Competition constructive algorithms, data structures, dp, greedy, sortings	1200	x18320
1846B	Rudolph and Tic-Tac-Toe brute force, implementation, strings	800	x26423
1846A	Rudolph and Cut the Rope implementation, math	800	x31911
1845F	Swimmers in the Pool dp, fft, math, number theory	2800	x359
1845E	Boxes and Balls dp, implementation, math	2500	x1289
1845D	Rating System binary search, brute force, data structures, dp, dsu, greedy, math, two pointers	1800	x7501
1845C	Strong Password binary search, dp, greedy, strings	1400	x13661
1845B	Come Together geometry, implementation, math	900	x21168
1845A	Forbidden Integer constructive algorithms, implementation, math, number theory	800	x25586
1844H	Multiple of Three Cycles combinatorics, data structures, dp, dsu, math	3400	x133
1844G	Tree Weights bitmasks, constructive algorithms, data structures, dfs and similar, implementation, math, matrices, number theory, trees	3000	x673
1844F2	Min Cost Permutation (Hard Version) binary search, constructive algorithms, data structures, greedy, math, sortings	2800	x377
1844F1	Min Cost Permutation (Easy Version) brute force, constructive algorithms, greedy, math	2600	x748
1844E	Great Grids 2-sat, constructive algorithms, dfs and similar, dsu, graphs	2400	x1703
1844D	Row Major constructive algorithms, greedy, math, number theory, strings	1400	x11923
1844C	Particles dp, greedy, implementation, math	1300	x15151
1844B	Permutations & Primes constructive algorithms, math	1000	x17741
1844A	Subtraction Game constructive algorithms, games	800	x24150
1843F2	Omsk Metro (hard version) data structures, dfs and similar, divide and conquer, dp, math, trees	2300	x1512
1843F1	Omsk Metro (simple version) data structures, dfs and similar, dp, graphs, greedy, math, trees	1800	x5100
1843E	Tracking Segments binary search, brute force, data structures, two pointers	1600	x11490
1843D	Apple Tree combinatorics, dfs and similar, dp, math, trees	1200	x17398
1843C	Sum in Binary Tree bitmasks, combinatorics, math, trees	800	x31861
1843B	Long Long greedy, math, two pointers	800	x28406
1843A	Sasha and Array Coloring greedy, sortings, two pointers	800	x33492
1842I	Tenzing and Necklace divide and conquer, dp, greedy	3500	x116
1842H	Tenzing and Random Real Numbers bitmasks, dp, graphs, math, probabilities	3000	x581
1842G	Tenzing and Random Operations combinatorics, dp, math, probabilities	2800	x960
1842F	Tenzing and Tree dfs and similar, greedy, shortest paths, sortings, trees	2500	x1265
1842E	Tenzing and Triangle data structures, dp, geometry, greedy, math	2300	x1561
1842D	Tenzing and His Animal Friends constructive algorithms, graphs, greedy	1900	x3968
1842C	Tenzing and Balls dp	1500	x12095
1842B	Tenzing and Books bitmasks, greedy, math	1100	x16254
1842A	Tenzing and Tsondu games, math	800	x19603
1841F	Monocarp and a Strategic Game geometry, sortings, two pointers	2700	x479
1841E	Fill the Matrix data structures, greedy, math	2200	x1925
1841D	Pairs of Segments data structures, greedy, sortings, two pointers	2000	x4228
1841C	Ranom Numbers brute force, dp, greedy, math, strings	1800	x7470
1841B	Keep it Beautiful implementation	1000	x20982
1841A	Game with Board constructive algorithms, games	800	x24433
1840G2	In Search of Truth (Hard Version) constructive algorithms, interactive, math, meet-in-the-middle, probabilities	2500	x914
1840G1	In Search of Truth (Easy Version) constructive algorithms, interactive, math, meet-in-the-middle, probabilities	2200	x2270
1840F	Railguns brute force, dfs and similar, dp, graphs	2200	x1731
1840E	Character Blocking data structures, hashing, implementation	1600	x7750
1840D	Wooden Toy Festival binary search, greedy, sortings	1400	x13259
1840C	Ski Resort combinatorics, math, two pointers	1000	x25756
1840B	Binary Cafe bitmasks, combinatorics, math	1100	x21923
1840A	Cipher Shifer implementation, strings, two pointers	800	x33269
1839E	Decreasing Game constructive algorithms, dfs and similar, dp, greedy, interactive	2400	x1180
1839D	Ball Sorting data structures, dp, sortings	2100	x2231
1839C	Insert Zero and Invert Prefix constructive algorithms	1300	x11594
1839B	Lamps greedy, sortings	1100	x14735
1839A	The Good Array greedy, implementation, math	800	x17239
1838F	Stuck Conveyor binary search, constructive algorithms, interactive	3000	x306
1838E	Count Supersequences combinatorics, dp, math	2500	x1395
1838D	Bracket Walk data structures, greedy, strings	2100	x3128
1838C	No Prime Differences constructive algorithms, math, number theory	1400	x13825
1838B	Minimize Permutation Subarrays constructive algorithms, math	1100	x16055
1838A	Blackboard List constructive algorithms, math	800	x21244
1837F	Editorial for Two binary search, data structures, greedy, implementation	2400	x2109
1837E	Playoff Fixing combinatorics, trees	2200	x2126
1837D	Bracket Coloring constructive algorithms, greedy	1400	x13925
1837C	Best Binary String constructive algorithms, greedy	1000	x21452