Problemset - Codeforces

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Educational Codeforces Round 169 (Rated for Div. 2)
10:12:05
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Problems

#	Name
1147A	Hide and Seek graphs	1500	x5185
1146C	Tree Diameter bitmasks, graphs, interactive	1700	x3657
1144F	Graph Without Long Directed Paths dfs and similar, graphs	1700	x11389
1144D	Equalize Them All constructive algorithms, greedy	1400	x10186
1143C	Queen dfs and similar, trees	1400	x12009
1142A	The Beatles brute force, math	1700	x3404
1141E	Superhero Battle math	1700	x6698
1141D	Colored Boots greedy, implementation	1500	x8476
1141C	Polycarp Restores Permutation math	1500	x11376
1140C	Playlist brute force, data structures, sortings	1600	x9475
1139C	Edgy Trees dfs and similar, dsu, graphs, math, trees	1500	x12385
1137B	Camp Schedule greedy, hashing, strings	1600	x6046
1137A	Skyscrapers implementation, sortings	1600	x4454
1136C	Nastya Is Transposing Matrices constructive algorithms, sortings	1500	x7679
1133F1	Spanning Tree with Maximum Degree graphs	1600	x7705
1133D	Zero Quantity Maximization hashing, math, number theory	1500	x11511
1132C	Painting the Fence brute force	1700	x5393
1131F	Asya And Kittens constructive algorithms, dsu	1700	x6568
1131B	Draw! greedy, implementation	1400	x9683
1130C	Connect brute force, dfs and similar, dsu	1400	x8506
1129A1	Toy Train (Simplified) brute force, greedy	1700	x3805
1121C	System Testing implementation	1600	x1986
1119C	Ramesses and Corner Inversion constructive algorithms, greedy, implementation, math	1500	x6813
1119B	Alyona and a Narrow Fridge binary search, flows, greedy, sortings	1300	x10683
1118E	Yet Another Ball Problem constructive algorithms, implementation	1700	x4107
1118D2	Coffee and Coursework (Hard Version) binary search, greedy	1700	x6205
1118D1	Coffee and Coursework (Easy version) brute force, greedy	1700	x5625
1118C	Palindromic Matrix constructive algorithms, implementation	1700	x5728
1115U3	Block unitary *special problem	1700	x197
1115U2	Chessboard unitary *special problem	1600	x232
1115U1	Anti-diagonal unitary *special problem	1500	x254
1115G3	Palindrome checker oracle *special problem	1600	x229
1115G2	OR oracle *special problem	1600	x310
1114C	Trailing Loves (or L'oeufs?) brute force, implementation, math, number theory	1700	x7344
1114B	Yet Another Array Partitioning Task constructive algorithms, greedy, sortings	1500	x8922
1113B	Sasha and Magnetic Machines greedy, number theory	1300	x7705
1111C	Creative Snap binary search, brute force, divide and conquer, math	1700	x6221
1111B	Average Superhero Gang Power brute force, implementation, math	1700	x6226
1110C	Meaningless Operations constructive algorithms, math, number theory	1500	x9282
1110B	Tape greedy, sortings	1400	x11293
1109A	Sasha and a Bit of Relax dp, implementation	1600	x8454
1108D	Diverse Garland constructive algorithms, dp, greedy	1400	x14936
1108C	Nice Garland brute force, greedy, math	1300	x11892
1107C	Brutality greedy, sortings, two pointers	1300	x9895
1106D	Lunar New Year and a Wander data structures, dfs and similar, graphs, greedy, shortest paths	1500	x14420
1106B	Lunar New Year and Food Ordering data structures, implementation	1500	x6732
1105C	Ayoub and Lost Array combinatorics, dp, math	1500	x10286
1103A	Grid game constructive algorithms, implementation	1400	x9714
1102E	Monotonic Renumeration combinatorics, sortings	1700	x5849
1102D	Balanced Ternary String greedy, strings	1500	x7930
1102B	Array K-Coloring greedy, sortings	1400	x10323
1101E	Polycarp's New Job implementation	1500	x7778
1101C	Division and Union sortings	1500	x7865
1101B	Accordion greedy, implementation	1300	x10440
1100B	Build a Contest data structures, implementation	1300	x11081
1098A	Sum in the tree constructive algorithms, dfs and similar, greedy, trees	1600	x8694
1097C	Yuhao and a Parenthesis greedy, implementation	1400	x8417
1096C	Polygon for the Angle brute force, geometry	1600	x6726
1096B	Substring Removal combinatorics, math, strings	1300	x10511
1095D	Circular Dance implementation	1600	x7505
1095C	Powers Of Two bitmasks, greedy	1400	x16518
1093D	Beautiful Graph dfs and similar, graphs	1700	x8841
1093C	Mishka and the Last Exam greedy	1300	x9330
1092C	Prefixes and Suffixes strings	1700	x5869
1091D	New Year and the Permutation Concatenation combinatorics, dp, math	1700	x6710
1091C	New Year and the Sphere Transmission math, number theory	1400	x9929
1090A	Company Merging greedy	1300	x4141
1089G	Guest Student math	1500	x2877
1089E	Easy Chess constructive algorithms	1700	x1965
1088C	Ehab and a 2-operation task constructive algorithms, greedy, math	1400	x8028
1085D	Minimum Diameter Tree constructive algorithms, implementation, trees	1700	x5392
1085C	Connect Three implementation, math	1600	x5409
1084C	The Fair Nut and String combinatorics, dp, implementation	1500	x7919
1082C	Multi-Subject Competition greedy, sortings	1600	x5680
1082B	Vova and Trophies greedy	1600	x7475
1081C	Colorful Bricks combinatorics, dp, math	1500	x7194
1081B	Farewell Party constructive algorithms, implementation	1500	x4424
1080C	Masha and two friends implementation	1500	x4012
1077D	Cutting Out binary search, sortings	1600	x8761
1077C	Good Array	1300	x16743
1076C	Meme Problem binary search, math	1300	x12308
1073D	Berland Fair binary search, brute force, data structures, greedy	1700	x6375
1070H	BerOS File Suggestion brute force, implementation	1500	x3635
1070F	Debate greedy	1500	x3583
1070D	Garbage Disposal greedy	1300	x4881
1068C	Colored Rooks constructive algorithms, graphs	1700	x3136
1068A	Birthday math	1400	x6754
1066E	Binary Numbers AND Sum data structures, implementation, math	1700	x6105
1066C	Books Queries implementation	1400	x9554
1066B	Heaters greedy, two pointers	1500	x8233
1065C	Make It Equal greedy	1600	x7764
1065B	Vasya and Isolated Vertices constructive algorithms, graphs	1300	x10873
1063A	Oh Those Palindromes constructive algorithms, strings	1300	x10307
1062C	Banh-mi greedy, implementation, math	1600	x5381
1062B	Math greedy, math, number theory	1500	x8594
1062A	A Prank greedy, implementation	1300	x8754
1061C	Multiplicity data structures, dp, implementation, math, number theory	1700	x8666
1061B	Views Matter greedy, implementation, sortings	1400	x7268
1060C	Maximum Subrectangle binary search, implementation, two pointers	1600	x4863
1059C	Sequence Transformation constructive algorithms, math	1600	x7085