Problemset - Codeforces

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Codeforces Round (Div. 2)
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Problems

#	Name
1268E	Happy Cactus dp	3400	x251
1268D	Invertation in Tournament brute force, divide and conquer, graphs, math	3200	x505
1268C	K Integers binary search, data structures	2300	x1720
1268B	Domino for Young dp, greedy, math	2000	x5922
1268A	Long Beautiful Integer constructive algorithms, greedy, implementation, strings	1700	x8629
1267L	Lexicography constructive algorithms, strings	1800	x3043
1267K	Key Storage combinatorics, math	2100	x1911
1267J	Just Arrange the Icons greedy, implementation, math	1800	x2813
1267I	Intriguing Selection brute force, constructive algorithms, implementation, interactive, sortings	2600	x885
1267H	Help BerLine constructive algorithms	3200	x150
1267G	Game Relics math, probabilities	3000	x653
1267F	Foolprüf Security graphs	2600	x663
1267E	Elections greedy	1700	x3236
1267D	DevOps Best Practices constructive algorithms	2800	x217
1267C	Cactus Revenge constructive algorithms	3500	x383
1267B	Balls of Buma	900	x3996
1267A	Apprentice Learning Trajectory	2400	x986
1266H	Red-Blue Graph dp, graphs, math, matrices, meet-in-the-middle	3400	x104
1266G	Permutation Concatenation string suffix structures	3300	x122
1266F	Almost Same Distance dfs and similar, graphs	2900	x340
1266E	Spaceship Solitaire data structures, greedy, implementation	2100	x2234
1266D	Decreasing Debts constructive algorithms, data structures, graphs, greedy, implementation, math, two pointers	2000	x3628
1266C	Diverse Matrix constructive algorithms, greedy, math, number theory	1400	x9697
1266B	Dice Tower constructive algorithms, math	1000	x15032
1266A	Competitive Programmer chinese remainder theorem, math	1000	x15862
1265E	Beautiful Mirrors data structures, dp, math, probabilities	2100	x3657
1265B	Beautiful Numbers data structures, implementation, math, two pointers	1300	x12578
1265A	Beautiful String constructive algorithms, greedy	1000	x15089
1264F	Beautiful Fibonacci Problem constructive algorithms, number theory	3500	x936
1264E	Beautiful League constructive algorithms, flows, graph matchings	2700	x814
1264D2	Beautiful Bracket Sequence (hard version) combinatorics, probabilities	2900	x985
1264D1	Beautiful Bracket Sequence (easy version) combinatorics, dp, probabilities	2600	x1281
1264C	Beautiful Mirrors with queries data structures, probabilities	2400	x1155
1264B	Beautiful Sequence brute force, constructive algorithms, greedy	1900	x5802
1264A	Beautiful Regional Contest greedy, implementation	1500	x10064
1263F	Economic Difficulties data structures, dfs and similar, dp, flows, graphs, trees	2400	x876
1263E	Editor data structures, implementation	2100	x2790
1263D	Secret Passwords dfs and similar, dsu, graphs	1500	x14014
1263C	Everyone is a Winner! binary search, math, meet-in-the-middle, number theory	1400	x13718
1263B	PIN Codes greedy, implementation	1400	x11376
1263A	Sweet Problem math	1100	x16326
1261F	Xor-Set bitmasks, divide and conquer, math	3100	x387
1260F	Colored Tree data structures, trees	2700	x539
1260E	Tournament brute force, dp, greedy	2400	x1720
1260D	A Game with Traps binary search, dp, greedy, sortings	1900	x3849
1260C	Infinite Fence greedy, math, number theory	1700	x8241
1260B	Obtain Two Zeroes binary search, math	1300	x15739
1260A	Heating math	1000	x14702
1257G	Divisor Set divide and conquer, fft, greedy, math, number theory	2600	x609
1257F	Make Them Similar bitmasks, brute force, hashing, meet-in-the-middle	2400	x2015
1257E	The Contest data structures, dp, greedy	2000	x4225
1257D	Yet Another Monster Killing Problem binary search, data structures, dp, greedy, sortings, two pointers	1700	x7548
1257C	Dominated Subarray greedy, implementation, sortings, strings, two pointers	1200	x15955
1257B	Magic Stick math	1000	x20439
1257A	Two Rival Students greedy, math	800	x20513
1256F	Equalizing Two Strings constructive algorithms, sortings, strings	2000	x3313
1256E	Yet Another Division Into Teams dp, greedy, sortings	2000	x4132
1256D	Binary String Minimizing greedy	1500	x12062
1256C	Platforms Jumping greedy	1700	x6897
1256B	Minimize the Permutation greedy	1400	x13086
1256A	Payment Without Change math	1000	x29392
1255C	League of Leesins constructive algorithms, implementation	1600	x6706
1255B	Fridge Lockers graphs, implementation	1100	x11954
1255A	Changing Volume math	800	x17198
1254E	Send Tree to Charlie combinatorics, dfs and similar, dsu, trees	3300	x265
1254D	Tree Queries data structures, probabilities, trees	2700	x1221
1254C	Point Ordering constructive algorithms, geometry, interactive, math	2300	x1421
1254B2	Send Boxes to Alice (Hard Version) constructive algorithms, greedy, math, number theory, ternary search, two pointers	2100	x3168
1254B1	Send Boxes to Alice (Easy Version) constructive algorithms, greedy, math, number theory, ternary search, two pointers	1800	x4660
1254A	Feeding Chicken constructive algorithms, greedy, implementation	1700	x5180
1253F	Cheap Robot binary search, dsu, graphs, shortest paths, trees	2500	x1781
1253E	Antenna Coverage data structures, dp, greedy, sortings	2200	x2833
1253D	Harmonious Graph constructive algorithms, dfs and similar, dsu, graphs, greedy, sortings	1700	x9219
1253C	Sweets Eating dp, greedy, math, sortings	1500	x14244
1253B	Silly Mistake greedy, implementation	1400	x11186
1253A	Single Push implementation	1000	x18042
1252L	Road Construction flows, graphs	2300	x581
1252K	Addition Robot data structures, math, matrices	2100	x1853
1252J	Tiling Terrace brute force, dp	2300	x719
1252I	Mission Possible	3000	x31
1252H	Twin Buildings greedy, implementation	1800	x2630
1252G	Performance Review data structures	2100	x1423
1252F	Regular Forestation hashing, trees	2400	x929
1252E	Songwriter greedy, two pointers	2200	x1238
1252D	Find String in a Grid data structures, dp, strings, trees	3000	x343
1252C	Even Path data structures, implementation	1600	x3718
1252B	Cleaning Robots dp, trees	2300	x518
1252A	Copying Homework	1000	x5638
1251F	Red-White Fence combinatorics, fft	2500	x820
1251E2	Voting (Hard Version) binary search, data structures, greedy	2400	x2643
1251E1	Voting (Easy Version) data structures, dp, greedy	2300	x2338
1251D	Salary Changing binary search, greedy, sortings	1900	x5940
1251C	Minimize The Integer greedy, two pointers	1600	x12400
1251B	Binary Palindromes greedy, strings	1400	x11013
1251A	Broken Keyboard brute force, strings, two pointers	1000	x19610
1250N	Wires dfs and similar, graphs, greedy	2000	x1584
1250M	SmartGarden constructive algorithms, divide and conquer	2500	x360
1250L	Divide The Students binary search, greedy, math	1500	x4098
1250K	Projectors flows, graphs	3100	x203
1250J	The Parade binary search, greedy	1800	x2937