Problemset - Codeforces

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Codeforces Round (Div. 2)
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Problems

#	Name
1662E	Round Table math		x128
1662D	Evolution of Weasels greedy, implementation, strings		x1699
1662C	European Trip dp, graphs, math, matrices		x291
1662B	Toys greedy, strings		x132
1662A	Organizing SWERC brute force, implementation		x4193
1661F	Teleporters binary search, greedy	2600	x558
1661E	Narrow Components brute force, data structures, dp, dsu, math, trees	2500	x915
1661D	Progressions Covering data structures, greedy	1900	x4549
1661C	Water the Trees binary search, greedy, math	1700	x9033
1661B	Getting Zero bitmasks, brute force, dfs and similar, dp, graphs, greedy, shortest paths	1300	x17104
1661A	Array Balancing greedy, math	800	x18223
1660F2	Promising String (hard version) data structures, implementation, math, strings	2100	x2615
1660F1	Promising String (easy version) brute force, implementation, math, strings	1700	x7049
1660E	Matrix and Shifts brute force, constructive algorithms, greedy, implementation	1600	x7029
1660D	Maximum Product Strikes Back brute force, implementation, math, two pointers	1600	x8248
1660C	Get an Even String dp, greedy, strings	1300	x18908
1660B	Vlad and Candies math	800	x27636
1660A	Vasya and Coins greedy, math	800	x35225
1659F	Tree and Permutation Game dfs and similar, games, graphs, trees	3000	x184
1659E	AND-MEX Walk bitmasks, brute force, constructive algorithms, dfs and similar, dsu, graphs	2200	x1473
1659D	Reverse Sort Sum constructive algorithms, data structures, greedy, implementation, math, two pointers	1900	x3900
1659C	Line Empire binary search, brute force, dp, greedy, implementation, math	1500	x9828
1659B	Bit Flipping bitmasks, constructive algorithms, greedy, strings	1300	x10672
1659A	Red Versus Blue constructive algorithms, greedy, implementation, math	1000	x17206
1658F	Juju and Binary String brute force, constructive algorithms, greedy, math	2700	x731
1658E	Gojou and Matrix Game data structures, dp, games, hashing, implementation, math, number theory, sortings	2500	x1027
1658D2	388535 (Hard Version) bitmasks, brute force, data structures, math	2300	x2452
1658D1	388535 (Easy Version) bitmasks, math	1600	x8817
1658C	Shinju and the Lost Permutation constructive algorithms, math	1700	x9125
1658B	Marin and Anti-coprime Permutation combinatorics, math, number theory	800	x18410
1658A	Marin and Photoshoot constructive algorithms, implementation, math	800	x20166
1657F	Words on Tree 2-sat, dfs and similar, dsu, graphs, trees	2600	x556
1657E	Star MST combinatorics, dp, graph matchings, math	2200	x1999
1657D	For Gamers. By Gamers. binary search, brute force, greedy, math, sortings	2000	x4732
1657C	Bracket Sequence Deletion greedy, implementation	1200	x16576
1657B	XY Sequence greedy	800	x22627
1657A	Integer Moves brute force, math	800	x23743
1656I	Neighbour Ordering constructive algorithms, graphs	3500	x98
1656H	Equal LCM Subsets data structures, math, number theory	3200	x419
1656G	Cycle Palindrome constructive algorithms, graphs, math	3200	x274
1656F	Parametric MST binary search, constructive algorithms, graphs, greedy, math, sortings	2600	x1000
1656E	Equal Tree Sums constructive algorithms, dfs and similar, math, trees	2200	x3324
1656D	K-good constructive algorithms, math, number theory	1900	x6667
1656C	Make Equal With Mod constructive algorithms, math, number theory, sortings	1200	x18640
1656B	Subtract Operation data structures, greedy, math, two pointers	1100	x17845
1656A	Good Pairs math, sortings	800	x19420
1654H	Three Minimums combinatorics, constructive algorithms, divide and conquer, dp, fft, math	3500	x71
1654G	Snowy Mountain data structures, dfs and similar, graphs, greedy, shortest paths, trees	2900	x358
1654F	Minimal String Xoration bitmasks, data structures, divide and conquer, greedy, hashing, sortings, strings	2800	x1061
1654E	Arithmetic Operations brute force, data structures, graphs, math	2300	x2002
1654D	Potion Brewing Class dfs and similar, math, number theory, trees	2100	x2793
1654C	Alice and the Cake data structures, greedy, implementation, sortings	1400	x13216
1654B	Prefix Removals strings	800	x15514
1654A	Maximum Cake Tastiness brute force, greedy, implementation, sortings	800	x18463
1651F	Tower Defense binary search, brute force, data structures	3000	x364
1651E	Sum of Matchings brute force, combinatorics, constructive algorithms, dfs and similar, graph matchings, greedy, math	2600	x495
1651D	Nearest Excluded Points binary search, data structures, dfs and similar, graphs, shortest paths	1900	x4866
1651C	Fault-tolerant Network brute force, data structures, implementation	1500	x10517
1651B	Prove Him Wrong constructive algorithms, greedy	800	x19380
1651A	Playoff implementation	800	x25411
1650G	Counting Shortcuts data structures, dfs and similar, dp, graphs, shortest paths	2100	x2352
1650F	Vitaly and Advanced Useless Algorithms dp, greedy, implementation	2200	x1392
1650E	Rescheduling the Exam binary search, data structures, greedy, implementation, math, sortings	1900	x4036
1650D	Twist the Permutation brute force, constructive algorithms, implementation, math	1300	x12755
1650C	Weight of the System of Nested Segments greedy, hashing, implementation, sortings	1200	x16474
1650B	DIV + MOD math	900	x26963
1650A	Deletions of Two Adjacent Letters implementation, strings	800	x34027
1649B	Game of Ball Passing greedy, implementation	1300	x12803
1649A	Game implementation	800	x15415
1648F	Two Avenues data structures, dfs and similar, graphs	3500	x105
1648E	Air Reform data structures, dfs and similar, divide and conquer, dsu, graphs, implementation, trees	3200	x387
1648D	Serious Business data structures, divide and conquer, dp, implementation, shortest paths	2800	x808
1648C	Tyler and Strings combinatorics, data structures, implementation	1900	x2877
1648B	Integral Array brute force, constructive algorithms, data structures, math	1800	x6235
1648A	Weird Sum combinatorics, data structures, geometry, math, matrices, sortings	1400	x11932
1647F	Madoka and Laziness dp, greedy	3100	x379
1647E	Madoka and the Sixth-graders data structures, dfs and similar, greedy	2500	x958
1647D	Madoka and the Best School in Russia constructive algorithms, dp, math, number theory	1900	x5143
1647C	Madoka and Childish Pranks constructive algorithms, greedy	1300	x12417
1647B	Madoka and the Elegant Gift brute force, constructive algorithms, graphs, implementation	1200	x15124
1647A	Madoka and Math Dad implementation, math	800	x22535
1646F	Playing Around the Table constructive algorithms, greedy, implementation	2900	x407
1646E	Power Board brute force, dp, math, number theory	2200	x2310
1646D	Weight the Tree constructive algorithms, dfs and similar, dp, implementation, trees	2000	x3570
1646C	Factorials and Powers of Two bitmasks, brute force, constructive algorithms, dp, math	1500	x13357
1646B	Quality vs Quantity brute force, constructive algorithms, greedy, sortings, two pointers	800	x20913
1646A	Square Counting math	800	x24030
1644F	Basis combinatorics, fft, math, number theory	2900	x316
1644E	Expand the Path brute force, combinatorics, data structures, implementation, math	1900	x3013
1644D	Cross Coloring data structures, implementation, math	1700	x7019
1644C	Increase Subarray Sums brute force, dp, greedy, implementation	1400	x13434
1644B	Anti-Fibonacci Permutation brute force, constructive algorithms, implementation	800	x20503
1644A	Doors and Keys implementation	800	x26952
1642B	Power Walking greedy	900	x16640
1642A	Hard Way geometry	800	x16020
1641F	Covering Circle geometry	3500	x96
1641E	Special Positions combinatorics, divide and conquer, fft, math	3300	x205
1641D	Two Arrays bitmasks, brute force, combinatorics, greedy, hashing, math, two pointers	2700	x1053
1641C	Anonymity Is Important binary search, brute force, data structures, dsu, greedy, sortings	2200	x2347
1641B	Repetitions Decoding constructive algorithms, implementation, sortings	2000	x3744