Problemset - Codeforces

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Codeforces Round (Div. 2)
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Problems

#	Name
1656H	Equal LCM Subsets data structures, math, number theory	3200	x571
1656G	Cycle Palindrome constructive algorithms, graphs, math	3200	x385
1656F	Parametric MST binary search, constructive algorithms, graphs, greedy, math, sortings	2600	x1035
1656E	Equal Tree Sums constructive algorithms, dfs and similar, math, trees	2200	x3443
1656D	K-good constructive algorithms, math, number theory	1900	x6866
1656C	Make Equal With Mod constructive algorithms, math, number theory, sortings	1200	x19138
1656B	Subtract Operation data structures, greedy, math, two pointers	1100	x18833
1656A	Good Pairs math, sortings	800	x19582
1654H	Three Minimums combinatorics, constructive algorithms, divide and conquer, dp, fft, math	3500	x76
1654G	Snowy Mountain data structures, dfs and similar, graphs, greedy, shortest paths, trees	2900	x394
1654F	Minimal String Xoration bitmasks, data structures, divide and conquer, greedy, hashing, sortings, strings	2800	x1198
1654E	Arithmetic Operations brute force, data structures, graphs, math	2300	x2090
1654D	Potion Brewing Class dfs and similar, math, number theory, trees	2100	x2844
1654C	Alice and the Cake data structures, greedy, implementation, sortings	1400	x13477
1654B	Prefix Removals strings	800	x15622
1654A	Maximum Cake Tastiness brute force, greedy, implementation, sortings	800	x18653
1651F	Tower Defense binary search, brute force, data structures	3000	x380
1651E	Sum of Matchings brute force, combinatorics, constructive algorithms, dfs and similar, graph matchings, greedy, math	2600	x519
1651D	Nearest Excluded Points binary search, data structures, dfs and similar, graphs, shortest paths	1900	x5117
1651C	Fault-tolerant Network brute force, data structures, implementation	1500	x10702
1651B	Prove Him Wrong constructive algorithms, greedy	800	x19527
1651A	Playoff implementation	800	x25659
1650G	Counting Shortcuts data structures, dfs and similar, dp, graphs, shortest paths	2100	x2482
1650F	Vitaly and Advanced Useless Algorithms dp, greedy, implementation	2200	x1444
1650E	Rescheduling the Exam binary search, data structures, greedy, implementation, math, sortings	1900	x4142
1650D	Twist the Permutation brute force, constructive algorithms, implementation, math	1300	x13015
1650C	Weight of the System of Nested Segments greedy, hashing, implementation, sortings	1200	x16733
1650B	DIV + MOD math	900	x27640
1650A	Deletions of Two Adjacent Letters implementation, strings	800	x34684
1649B	Game of Ball Passing greedy, implementation	1300	x13030
1649A	Game implementation	800	x15529
1648F	Two Avenues data structures, dfs and similar, graphs	3500	x131
1648E	Air Reform data structures, dfs and similar, divide and conquer, dsu, graphs, implementation, trees	3200	x399
1648D	Serious Business data structures, divide and conquer, dp, implementation, shortest paths	2800	x881
1648C	Tyler and Strings combinatorics, data structures, implementation	1900	x2984
1648B	Integral Array brute force, constructive algorithms, data structures, math	1800	x6437
1648A	Weird Sum combinatorics, data structures, geometry, math, matrices, sortings	1400	x12783
1647F	Madoka and Laziness dp, greedy	3100	x451
1647E	Madoka and the Sixth-graders data structures, dfs and similar, greedy	2500	x992
1647D	Madoka and the Best School in Russia constructive algorithms, dp, math, number theory	1900	x5277
1647C	Madoka and Childish Pranks constructive algorithms, greedy	1300	x12586
1647B	Madoka and the Elegant Gift brute force, constructive algorithms, graphs, implementation	1200	x15386
1647A	Madoka and Math Dad implementation, math	800	x22755
1646F	Playing Around the Table constructive algorithms, greedy, implementation	2900	x525
1646E	Power Board brute force, dp, math, number theory	2200	x2431
1646D	Weight the Tree constructive algorithms, dfs and similar, dp, implementation, trees	2000	x3738
1646C	Factorials and Powers of Two bitmasks, brute force, constructive algorithms, dp, math	1500	x14103
1646B	Quality vs Quantity brute force, constructive algorithms, greedy, sortings, two pointers	800	x21150
1646A	Square Counting math	800	x24278
1644F	Basis combinatorics, fft, math, number theory	2900	x326
1644E	Expand the Path brute force, combinatorics, data structures, implementation, math	1900	x3095
1644D	Cross Coloring data structures, implementation, math	1700	x7233
1644C	Increase Subarray Sums brute force, dp, greedy, implementation	1400	x13757
1644B	Anti-Fibonacci Permutation brute force, constructive algorithms, implementation	800	x20673
1644A	Doors and Keys implementation	800	x27342
1642B	Power Walking greedy	900	x16925
1642A	Hard Way geometry	800	x16173
1641F	Covering Circle geometry	3500	x99
1641E	Special Positions combinatorics, divide and conquer, fft, math	3300	x208
1641D	Two Arrays bitmasks, brute force, combinatorics, greedy, hashing, math, two pointers	2700	x1153
1641C	Anonymity Is Important binary search, brute force, data structures, dsu, greedy, sortings	2200	x2420
1641B	Repetitions Decoding constructive algorithms, implementation, sortings	2000	x3811
1641A	Great Sequence brute force, greedy, sortings	1200	x17889
1639K	Treasure Hunt graphs, interactive
1639J	Treasure Hunt graphs, interactive
1639I	Treasure Hunt graphs, interactive
1639H	Treasure Hunt graphs, interactive
1639G	Treasure Hunt graphs, interactive
1639F	Treasure Hunt graphs, interactive
1639E	Treasure Hunt graphs, interactive
1639D	Treasure Hunt graphs, interactive
1639C	Treasure Hunt graphs, interactive
1639B	Treasure Hunt graphs, interactive
1639A	Treasure Hunt graphs, interactive
1638F	Two Posters brute force, data structures, greedy, two pointers	3200	x224
1638E	Colorful Operations brute force, data structures, implementation	2400	x1906
1638D	Big Brush constructive algorithms, data structures, greedy, implementation	2000	x4195
1638C	Inversion Graph data structures, dsu, graphs, math	1300	x14672
1638B	Odd Swap Sort data structures, math, sortings	1100	x20839
1638A	Reverse constructive algorithms, greedy, math	800	x21455
1637H	Minimize Inversions Number data structures, greedy, math, sortings	3500	x315
1637G	Birthday constructive algorithms, greedy, math	3000	x501
1637F	Towers constructive algorithms, dfs and similar, dp, greedy, trees	2500	x1772
1637E	Best Pair binary search, brute force, implementation	2100	x3333
1637D	Yet Another Minimization Problem dp, greedy, math	1800	x7706
1637C	Andrew and Stones greedy, implementation	1200	x17691
1637B	MEX and Array brute force, dp, greedy, math	1100	x14802
1637A	Sorting Parts brute force, sortings	800	x22296
1635F	Closest Pair data structures, greedy	2800	x1106
1635E	Cars 2-sat, constructive algorithms, dfs and similar, dsu, graphs, greedy, sortings	2200	x2222
1635D	Infinite Set bitmasks, dp, math, matrices, number theory, strings	1800	x6252
1635C	Differential Sorting constructive algorithms, greedy	1200	x17529
1635B	Avoid Local Maximums greedy	800	x17932
1635A	Min Or Sum bitmasks, greedy	800	x22902
1634F	Fibonacci Additions brute force, data structures, hashing, implementation, math	2700	x1597
1634E	Fair Share constructive algorithms, data structures, dfs and similar, graph matchings, graphs	2400	x1696
1634D	Finding Zero constructive algorithms, interactive, math	2000	x4365
1634C	OKEA constructive algorithms	1000	x18171
1634B	Fortune Telling bitmasks, math	1400	x16590
1634A	Reverse and Concatenate greedy, strings	800	x23877