Problemset - Codeforces

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Problems

#	Name
1661F	Teleporters binary search, greedy	2600	x604
1661E	Narrow Components brute force, data structures, dp, dsu, math, trees	2500	x958
1661D	Progressions Covering data structures, greedy	1900	x4792
1661C	Water the Trees binary search, greedy, math	1700	x9416
1661B	Getting Zero bitmasks, brute force, dfs and similar, dp, graphs, greedy, shortest paths	1300	x17953
1661A	Array Balancing greedy, math	800	x18422
1660F2	Promising String (hard version) data structures, implementation, math, strings	2100	x2746
1660F1	Promising String (easy version) brute force, implementation, math, strings	1700	x7328
1660E	Matrix and Shifts brute force, constructive algorithms, greedy, implementation	1600	x7374
1660D	Maximum Product Strikes Back brute force, implementation, math, two pointers	1600	x8750
1660C	Get an Even String dp, greedy, strings	1300	x19693
1660B	Vlad and Candies math	800	x28189
1660A	Vasya and Coins greedy, math	800	x36244
1659F	Tree and Permutation Game dfs and similar, games, graphs, trees	3000	x192
1659E	AND-MEX Walk bitmasks, brute force, constructive algorithms, dfs and similar, dsu, graphs	2200	x1606
1659D	Reverse Sort Sum constructive algorithms, data structures, greedy, implementation, math, two pointers	1900	x4039
1659C	Line Empire binary search, brute force, dp, greedy, implementation, math	1500	x10683
1659B	Bit Flipping bitmasks, constructive algorithms, greedy, strings	1300	x11002
1659A	Red Versus Blue constructive algorithms, greedy, implementation, math	1000	x19194
1658F	Juju and Binary String brute force, constructive algorithms, greedy, math	2700	x774
1658E	Gojou and Matrix Game data structures, dp, games, hashing, implementation, math, number theory, sortings	2500	x1059
1658D2	388535 (Hard Version) bitmasks, brute force, data structures, math	2300	x2589
1658D1	388535 (Easy Version) bitmasks, math	1600	x9157
1658C	Shinju and the Lost Permutation constructive algorithms, math	1700	x9390
1658B	Marin and Anti-coprime Permutation combinatorics, math, number theory	800	x18657
1658A	Marin and Photoshoot constructive algorithms, implementation, math	800	x20374
1657F	Words on Tree 2-sat, dfs and similar, dsu, graphs, trees	2600	x579
1657E	Star MST combinatorics, dp, graph matchings, math	2200	x2132
1657D	For Gamers. By Gamers. binary search, brute force, greedy, math, sortings	2000	x4925
1657C	Bracket Sequence Deletion greedy, implementation	1200	x16884
1657B	XY Sequence greedy	800	x22904
1657A	Integer Moves brute force, math	800	x24035
1656I	Neighbour Ordering constructive algorithms, graphs	3500	x105
1656H	Equal LCM Subsets data structures, math, number theory	3200	x595
1656G	Cycle Palindrome constructive algorithms, graphs, math	3200	x385
1656F	Parametric MST binary search, constructive algorithms, graphs, greedy, math, sortings	2600	x1069
1656E	Equal Tree Sums constructive algorithms, dfs and similar, math, trees	2200	x3480
1656D	K-good constructive algorithms, math, number theory	1900	x6909
1656C	Make Equal With Mod constructive algorithms, math, number theory, sortings	1200	x19311
1656B	Subtract Operation data structures, greedy, math, two pointers	1100	x19233
1656A	Good Pairs math, sortings	800	x19702
1654H	Three Minimums combinatorics, constructive algorithms, divide and conquer, dp, fft, math	3500	x79
1654G	Snowy Mountain data structures, dfs and similar, graphs, greedy, shortest paths, trees	2900	x406
1654F	Minimal String Xoration bitmasks, data structures, divide and conquer, greedy, hashing, sortings, strings	2800	x1212
1654E	Arithmetic Operations brute force, data structures, graphs, math	2300	x2103
1654D	Potion Brewing Class dfs and similar, math, number theory, trees	2100	x2865
1654C	Alice and the Cake data structures, greedy, implementation, sortings	1400	x13563
1654B	Prefix Removals strings	800	x15654
1654A	Maximum Cake Tastiness brute force, greedy, implementation, sortings	800	x18695
1651F	Tower Defense binary search, brute force, data structures	3000	x381
1651E	Sum of Matchings brute force, combinatorics, constructive algorithms, dfs and similar, graph matchings, greedy, math	2600	x523
1651D	Nearest Excluded Points binary search, data structures, dfs and similar, graphs, shortest paths	1900	x5193
1651C	Fault-tolerant Network brute force, data structures, implementation	1500	x10770
1651B	Prove Him Wrong constructive algorithms, greedy	800	x19692
1651A	Playoff implementation	800	x25751
1650G	Counting Shortcuts data structures, dfs and similar, dp, graphs, shortest paths	2100	x2526
1650F	Vitaly and Advanced Useless Algorithms dp, greedy, implementation	2200	x1496
1650E	Rescheduling the Exam binary search, data structures, greedy, implementation, math, sortings	1900	x4172
1650D	Twist the Permutation brute force, constructive algorithms, implementation, math	1300	x13106
1650C	Weight of the System of Nested Segments greedy, hashing, implementation, sortings	1200	x16845
1650B	DIV + MOD math	900	x27832
1650A	Deletions of Two Adjacent Letters implementation, strings	800	x34877
1649B	Game of Ball Passing greedy, implementation	1300	x13120
1649A	Game implementation	800	x15593
1648F	Two Avenues data structures, dfs and similar, graphs	3500	x135
1648E	Air Reform data structures, dfs and similar, divide and conquer, dsu, graphs, implementation, trees	3200	x414
1648D	Serious Business data structures, divide and conquer, dp, implementation, shortest paths	2800	x890
1648C	Tyler and Strings combinatorics, data structures, implementation	1900	x2997
1648B	Integral Array brute force, constructive algorithms, data structures, math	1800	x6485
1648A	Weird Sum combinatorics, data structures, geometry, math, matrices, sortings	1400	x13128
1647F	Madoka and Laziness dp, greedy	3100	x457
1647E	Madoka and the Sixth-graders data structures, dfs and similar, greedy	2500	x997
1647D	Madoka and the Best School in Russia constructive algorithms, dp, math, number theory	1900	x5314
1647C	Madoka and Childish Pranks constructive algorithms, greedy	1300	x12654
1647B	Madoka and the Elegant Gift brute force, constructive algorithms, graphs, implementation	1200	x15452
1647A	Madoka and Math Dad implementation, math	800	x22824
1646F	Playing Around the Table constructive algorithms, greedy, implementation	2900	x529
1646E	Power Board brute force, dp, math, number theory	2200	x2472
1646D	Weight the Tree constructive algorithms, dfs and similar, dp, implementation, trees	2000	x3799
1646C	Factorials and Powers of Two bitmasks, brute force, constructive algorithms, dp, math	1500	x14322
1646B	Quality vs Quantity brute force, constructive algorithms, greedy, sortings, two pointers	800	x21238
1646A	Square Counting math	800	x24351
1644F	Basis combinatorics, fft, math, number theory	2900	x329
1644E	Expand the Path brute force, combinatorics, data structures, implementation, math	1900	x3123
1644D	Cross Coloring data structures, implementation, math	1700	x7305
1644C	Increase Subarray Sums brute force, dp, greedy, implementation	1400	x13863
1644B	Anti-Fibonacci Permutation brute force, constructive algorithms, implementation	800	x20728
1644A	Doors and Keys implementation	800	x27446
1642B	Power Walking greedy	900	x17028
1642A	Hard Way geometry	800	x16235
1641F	Covering Circle geometry	3500	x101
1641E	Special Positions combinatorics, divide and conquer, fft, math	3300	x210
1641D	Two Arrays bitmasks, brute force, combinatorics, greedy, hashing, math, two pointers	2700	x1184
1641C	Anonymity Is Important binary search, brute force, data structures, dsu, greedy, sortings	2200	x2500
1641B	Repetitions Decoding constructive algorithms, implementation, sortings	2000	x3826
1641A	Great Sequence brute force, greedy, sortings	1200	x17967
1638F	Two Posters brute force, data structures, greedy, two pointers	3200	x227
1638E	Colorful Operations brute force, data structures, implementation	2400	x1944
1638D	Big Brush constructive algorithms, data structures, greedy, implementation	2000	x4230
1638C	Inversion Graph data structures, dsu, graphs, math	1300	x14763