Problemset - Codeforces

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Codeforces Round (Div. 2)
6 days

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Problems

#	Name
1131G	Most Dangerous Shark data structures, dp, two pointers	2700	x404
1131E	String Multiplication dp, greedy, strings	2300	x1128
1131D	Gourmet choice dfs and similar, dp, dsu, graphs, greedy	2000	x3186
1129D	Isolation data structures, dp	2900	x965
1129C	Morse Code binary search, data structures, dp, hashing, sortings, string suffix structures, strings	2400	x904
1120F	Secret Letters data structures, dp, greedy	3100	x252
1120D	Power Tree dfs and similar, dp, dsu, graphs, greedy, trees	2500	x1288
1120C	Compress String dp, strings	2100	x2074
1119F	Niyaz and Small Degrees data structures, dp, trees	3400	x684
1118F2	Tree Cutting (Hard Version) combinatorics, dfs and similar, dp, trees	2700	x525
1117F	Crisp String bitmasks, dp	2500	x520
1117D	Magic Gems dp, math, matrices	2100	x4066
1111E	Tree data structures, dfs and similar, dp, graphs, trees	2500	x863
1111D	Destroy the Colony combinatorics, dp, math	2600	x934
1110H	Modest Substrings dp, strings	3500	x278
1110D	Jongmah dp	2200	x3286
1109D	Sasha and Interesting Fact from Graph Theory brute force, combinatorics, dp, math, trees	2400	x1275
1107G	Vasya and Maximum Profit binary search, constructive algorithms, data structures, dp, dsu	2400	x1001
1107F	Vasya and Endless Credits dp, flows, graph matchings, graphs, sortings	2600	x746
1107E	Vasya and Binary String dp	2400	x2208
1106E	Lunar New Year and Red Envelopes data structures, dp	2100	x2377
1105E	Helping Hiasat bitmasks, brute force, dp, meet-in-the-middle	2200	x1604
1103D	Professional layer bitmasks, dp	3100	x402
1102F	Elongated Matrix binary search, bitmasks, brute force, dp, graphs	2000	x1939
1101F	Trucks and Cities binary search, dp	2400	x1286
1101D	GCD Counting data structures, dfs and similar, dp, number theory, trees	2000	x4471
1099F	Cookies binary search, data structures, dfs and similar, dp, games, trees	2400	x912
1097H	Mateusz and an Infinite Sequence bitmasks, brute force, dp, strings	3400	x94
1097G	Vladislav and a Great Legend combinatorics, dp, trees	3000	x690
1097D	Makoto and a Blackboard dp, math, number theory, probabilities	2200	x2627
1096G	Lucky Tickets divide and conquer, dp, fft	2400	x1411
1096F	Inversion Expectation dp, math, probabilities	2300	x1616
1096E	The Top Scorer combinatorics, dp, math, probabilities	2500	x928
1093F	Vasya and Array dp	2400	x986
1089A	Alice the Fan dp	2200	x1114
1088E	Ehab and a component choosing problem dp, greedy, math, trees	2400	x1411
1085G	Beautiful Matrix combinatorics, data structures, dp	2900	x510
1083E	The Fair Nut and Rectangles data structures, dp, geometry	2400	x4037
1082F	Speed Dial dp, strings, trees	2800	x414
1082E	Increasing Frequency binary search, dp, greedy	2000	x4197
1077F2	Pictures with Kittens (hard version) data structures, dp	2100	x3003
1076F	Summer Practice Report dp, greedy	2500	x628
1073F	Choosing Two Paths dfs and similar, dp, greedy, trees	2500	x527
1073E	Segment Sum bitmasks, combinatorics, dp, math	2300	x2432
1070J	Streets and Avenues in Berhattan dp	2300	x682
1070G	Monsters and Potions brute force, dp, greedy, implementation	2300	x822
1070A	Find a Number dp, graphs, number theory, shortest paths	2200	x2275
1067E	Random Forest Rank dp, graph matchings, math, trees	2800	x430
1067D	Computer Game dp, greedy, math, probabilities	3100	x364
1066F	Yet another 2D Walking dp	2100	x1847
1065F	Up and Down the Tree dfs and similar, dp, trees	2500	x1147
1065D	Three Pieces dfs and similar, dp, shortest paths	2200	x1278
1063F	String Journey data structures, dp, string suffix structures	3300	x810
1060F	Shrinking Tree combinatorics, dp	2900	x551
1060E	Sergey and Subway dfs and similar, dp, trees	2000	x3023
1059E	Split the Tree binary search, data structures, dp, greedy, trees	2400	x1365
1057C	Tanya and Colored Candies *special problem, dp	2000	x884
1056F	Write The Contest binary search, dp, math	2500	x515
1055E	Segments on the Line binary search, dp	2500	x716
1051E	Vasya and Big Integers binary search, data structures, dp, hashing, strings	2600	x911
1044C	Optimal Polygon Perimeter dp, geometry	2100	x1333
1043F	Make It One bitmasks, combinatorics, dp, math, number theory, shortest paths	2500	x2217
1042E	Vasya and Magic Matrix dp, math, probabilities	2300	x1705
1041F	Ray in the tube data structures, divide and conquer, dp, math	2500	x1459
1039D	You Are Given a Tree data structures, dp, trees	2800	x1674
1038F	Wrap Around dp, strings	2900	x299
1038E	Maximum Matching bitmasks, brute force, dfs and similar, dp, graphs	2400	x962
1034E	Little C Loves 3 III bitmasks, dp, math	3200	x613
1034C	Region Separation combinatorics, dp, number theory, trees	2700	x863
1032F	Vasya and Maximum Matching dp, trees	2400	x908
1032E	The Unbearable Lightness of Weights dp, math	2100	x1570
1030E	Vasya and Good Sequences bitmasks, dp	2000	x2986
1029E	Tree with Small Distances dp, graphs, greedy	2100	x2823
1028G	Guess the number dp, interactive	3000	x543
1027E	Inverse Coloring combinatorics, dp, math	2100	x2070
1025D	Recovering BST brute force, dp, math, number theory, trees	2100	x3395
1016F	Road Projects dfs and similar, dp, trees	2600	x784
1015F	Bracket Substring dp, strings	2300	x1063
1012F	Passports dp, implementation	3400	x153
1007E	Mini Metro dp	3400	x175
1006F	Xor-Paths bitmasks, brute force, dp, meet-in-the-middle	2100	x4856
1004E	Sonya and Ice Cream binary search, data structures, dp, greedy, shortest paths, trees	2400	x1018
1003F	Abbreviation dp, hashing, strings	2200	x1258
1000G	Two-Paths data structures, dp, trees	2700	x570
999F	Cards and Joy dp	2000	x2581
997B	Roman Digits brute force, combinatorics, dp, greedy, math	2000	x2876
995F	Cowmpany Cowmpensation combinatorics, dp, math, trees	2700	x1182
993D	Compute Power binary search, dp, greedy	2500	x627
990G	GCD Counting divide and conquer, dp, dsu, number theory, trees	2400	x1754
990F	Flow Control dfs and similar, dp, greedy, trees	2400	x877
989E	A Trance of Nightfall dp, geometry, matrices, probabilities	2700	x230
988F	Rain and Umbrellas dp	2100	x2252
985E	Pencils and Boxes binary search, data structures, dp, greedy, two pointers	2100	x3358
983C	Elevator dp, graphs, shortest paths	2400	x803
981H	K Paths combinatorics, data structures, dp, fft, math	3100	x268
981E	Addition on Segments bitmasks, data structures, divide and conquer, dp	2200	x2037
980F	Cactus to Tree dp, graphs, trees	2900	x194
980D	Perfect Groups dp, math, number theory	2100	x2476
979E	Kuro and Topological Parity dp	2400	x597
979D	Kuro and GCD and XOR and SUM binary search, bitmasks, brute force, data structures, dp, dsu, greedy, math, number theory, strings, trees	2200	x1718