Problemset - Codeforces

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Codeforces Round 944 (Div. 4)
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Problems

#	Name
1720B	Interesting Sum brute force, data structures, greedy, math, sortings	800	x20756
1713B	Optimal Reduction constructive algorithms, sortings	1000	x20728
1712C	Sort Zero greedy, sortings	1100	x19220
1707C	DFS Trees dfs and similar, dsu, graphs, greedy, sortings, trees	2400	x1388
1707B	Difference Array brute force, data structures, implementation, sortings	1900	x5537
1705D	Mark and Lightbulbs combinatorics, constructive algorithms, greedy, math, sortings	1800	x6102
1705A	Mark the Photographer greedy, sortings	800	x24816
1704C	Virus greedy, implementation, sortings	1200	x14405
1703F	Yet Another Problem About Pairs Satisfying an Inequality binary search, data structures, dp, greedy, sortings	1300	x18190
1701D	Permutation Restoration binary search, data structures, greedy, math, sortings, two pointers	1900	x5484
1698E	PermutationForces II brute force, combinatorics, greedy, sortings, trees, two pointers	2300	x1573
1697B	Promo greedy, sortings	900	x25516
1692G	2^Sort data structures, dp, sortings, two pointers	1400	x15933
1692B	All Distinct greedy, sortings	800	x32789
1691E	Number of Groups data structures, dfs and similar, dsu, graphs, greedy, sortings	2300	x1747
1690G	Count the Trains binary search, data structures, greedy, sortings	2000	x3243
1689A	Lex String brute force, greedy, implementation, sortings, two pointers	800	x16380
1688B	Patchouli's Magical Talisman bitmasks, constructive algorithms, greedy, sortings	800	x17854
1687C	Sanae and Giant Robot binary search, brute force, data structures, dsu, greedy, sortings	2500	x1336
1687B	Railway System constructive algorithms, graphs, greedy, interactive, sortings	1700	x3485
1685B	Linguistics greedy, implementation, sortings, strings	2000	x3163
1685A	Circular Local MiniMax constructive algorithms, greedy, sortings	1100	x16482
1684D	Traps constructive algorithms, greedy, sortings	1700	x9305
1684C	Column Swapping brute force, constructive algorithms, greedy, implementation, sortings	1400	x12022
1682F	MCMF? data structures, flows, graphs, greedy, sortings, two pointers	2700	x285
1682E	Unordered Swaps constructive algorithms, dfs and similar, graphs, greedy, math, sortings, trees	2700	x561
1682B	AND Sorting bitmasks, constructive algorithms, sortings	1100	x17219
1681C	Double Sort implementation, sortings	1200	x16969
1676H2	Maximum Crossings (Hard Version) data structures, divide and conquer, sortings	1500	x10036
1676F	Longest Strike data structures, greedy, implementation, sortings, two pointers	1300	x15845
1676E	Eating Queries binary search, greedy, sortings	1100	x24667
1676B	Equal Candies greedy, math, sortings	800	x45197
1674D	A-B-C Sort constructive algorithms, implementation, sortings	1200	x15773
1671E	Preorder combinatorics, divide and conquer, dp, dsu, hashing, sortings, trees	2100	x2645
1671B	Consecutive Points Segment brute force, math, sortings	1000	x18117
1670A	Prof. Slim greedy, implementation, sortings	800	x15234
1669B	Triple implementation, sortings	800	x39917
1668B	Social Distance greedy, math, sortings	900	x16320
1665C	Tree Infection binary search, greedy, sortings, trees	1600	x8041
1665B	Array Cloning Technique constructive algorithms, greedy, sortings	900	x18720
1662N	Drone Photo combinatorics, math, sortings		x690
1662I	Ice Cream Shop brute force, implementation, sortings		x1961
1658E	Gojou and Matrix Game data structures, dp, games, hashing, implementation, math, number theory, sortings	2500	x1020
1657D	For Gamers. By Gamers. binary search, brute force, greedy, math, sortings	2000	x4705
1656F	Parametric MST binary search, constructive algorithms, graphs, greedy, math, sortings	2600	x987
1656C	Make Equal With Mod constructive algorithms, math, number theory, sortings	1200	x18489
1656A	Good Pairs math, sortings	800	x19237
1654F	Minimal String Xoration bitmasks, data structures, divide and conquer, greedy, hashing, sortings, strings	2800	x1051
1654C	Alice and the Cake data structures, greedy, implementation, sortings	1400	x13155
1654A	Maximum Cake Tastiness brute force, greedy, implementation, sortings	800	x18412
1650E	Rescheduling the Exam binary search, data structures, greedy, implementation, math, sortings	1900	x4020
1650C	Weight of the System of Nested Segments greedy, hashing, implementation, sortings	1200	x16371
1648A	Weird Sum combinatorics, data structures, geometry, math, matrices, sortings	1400	x11752
1646B	Quality vs Quantity brute force, constructive algorithms, greedy, sortings, two pointers	800	x20866
1641C	Anonymity Is Important binary search, brute force, data structures, dsu, greedy, sortings	2200	x2328
1641B	Repetitions Decoding constructive algorithms, implementation, sortings	2000	x3728
1641A	Great Sequence brute force, greedy, sortings	1200	x17524
1638B	Odd Swap Sort data structures, math, sortings	1100	x20413
1637H	Minimize Inversions Number data structures, greedy, math, sortings	3500	x300
1637A	Sorting Parts brute force, sortings	800	x22073
1635E	Cars 2-sat, constructive algorithms, dfs and similar, dsu, graphs, greedy, sortings	2200	x2166
1633E	Spanning Tree Queries binary search, data structures, dfs and similar, dsu, graphs, greedy, math, sortings, trees	2400	x1458
1630C	Paint the Middle dp, greedy, sortings, two pointers	2200	x2833
1629A	Download More RAM brute force, greedy, sortings	800	x28552
1628F	Spaceship Crisis Management binary search, data structures, geometry, sortings	3500	x84
1627B	Not Sitting games, greedy, sortings	1300	x16277
1626A	Equidistant Letters constructive algorithms, sortings	800	x28328
1625D	Binary Spiders bitmasks, data structures, implementation, math, sortings, trees	2300	x1968
1625B	Elementary Particles brute force, greedy, sortings	1100	x15857
1624D	Palindromes Coloring binary search, greedy, sortings, strings	1400	x16257
1623B	Game on Ranges brute force, dfs and similar, implementation, sortings	1100	x13904
1622C	Set or Decrease binary search, brute force, greedy, sortings	1600	x12376
1622B	Berland Music data structures, greedy, math, sortings	1000	x20533
1621E	New School binary search, data structures, dp, greedy, implementation, sortings	2300	x1711
1619G	Unusual Minesweeper binary search, dfs and similar, dsu, greedy, sortings	2000	x2269
1619E	MEX and Increments constructive algorithms, data structures, dp, greedy, implementation, math, sortings	1700	x8675
1619D	New Year's Problem binary search, greedy, sortings	1800	x7263
1618G	Trader Problem data structures, dsu, greedy, sortings	2200	x1477
1618A	Polycarp and Sums of Subsequences math, sortings	800	x31554
1617C	Paprika and Permutation binary search, greedy, math, sortings	1300	x14562
1617A	Forbidden Subsequence constructive algorithms, greedy, sortings, strings	800	x16088
1615E	Purple Crayon data structures, dfs and similar, games, graphs, greedy, math, sortings, trees	2400	x1404
1614B	Divan and a New Project constructive algorithms, sortings	1000	x17872
1613B	Absent Remainder greedy, implementation, sortings	1000	x21186
1612G	Max Sum Array combinatorics, constructive algorithms, greedy, sortings	2500	x815
1612E	Messages brute force, dp, greedy, probabilities, sortings	2000	x2391
1608E	The Cells on the Paper binary search, implementation, sortings	2800	x423
1607H	Banquet Preparations 2 greedy, sortings, two pointers	2200	x1192
1607D	Blue-Red Permutation greedy, math, sortings	1300	x16405
1607C	Minimum Extraction brute force, sortings	1000	x24331
1606D	Red-Blue Matrix brute force, constructive algorithms, implementation, sortings	2400	x1400
1605E	Array Equalizer binary search, greedy, implementation, math, number theory, sortings, two pointers	2400	x997
1605B	Reverse Sort greedy, sortings	1000	x17642
1601D	Difficult Mountain data structures, dp, greedy, sortings	2700	x1381
1601C	Optimal Insertion data structures, divide and conquer, dp, greedy, sortings	2300	x1915
1592B	Hemose Shopping constructive algorithms, dsu, math, sortings	1200	x15579
1592A	Gamer Hemose binary search, greedy, math, sortings	800	x21605
1584C	Two Arrays greedy, math, sortings	900	x15955
1583H	Omkar and Tours data structures, divide and conquer, sortings, trees	3300	x313
1579B	Shifting Sort implementation, sortings	1100	x17815