Problemset - Codeforces

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Codeforces Round 978 (Div. 2)
6 days

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Problems

#	Name
1110F	Nearest Leaf data structures, trees	2600	x1734
1110E	Magic Stones constructive algorithms, math, sortings	2200	x4163
1110D	Jongmah dp	2200	x3543
1110C	Meaningless Operations constructive algorithms, math, number theory	1500	x9378
1110B	Tape greedy, sortings	1400	x11579
1110A	Parity math	900	x15012
1109F	Sasha and Algorithm of Silence's Sounds data structures, trees	3200	x293
1109E	Sasha and a Very Easy Test data structures, number theory	2700	x526
1109D	Sasha and Interesting Fact from Graph Theory brute force, combinatorics, dp, math, trees	2400	x1334
1109C	Sasha and a Patient Friend binary search, data structures, implementation	2800	x255
1109B	Sasha and One More Name constructive algorithms, hashing, strings	1800	x4358
1109A	Sasha and a Bit of Relax dp, implementation	1600	x8502
1108F	MST Unification binary search, dsu, graphs, greedy	2100	x2919
1108E2	Array and Segments (Hard version) data structures, implementation	2100	x2206
1108E1	Array and Segments (Easy version) brute force, greedy, implementation	1800	x4537
1108D	Diverse Garland constructive algorithms, dp, greedy	1400	x15167
1108C	Nice Garland brute force, greedy, math	1300	x11970
1108B	Divisors of Two Integers brute force, greedy, math, number theory	1100	x23197
1108A	Two distinct points implementation	800	x21741
1107G	Vasya and Maximum Profit binary search, constructive algorithms, data structures, dp, dsu	2400	x1056
1107F	Vasya and Endless Credits dp, flows, graph matchings, graphs, sortings	2600	x798
1107E	Vasya and Binary String dp	2400	x2294
1107D	Compression dp, implementation, math, number theory	1800	x3726
1107C	Brutality greedy, sortings, two pointers	1300	x9952
1107B	Digital root math, number theory	1000	x15900
1107A	Digits Sequence Dividing greedy, strings	900	x12039
1106F	Lunar New Year and a Recursive Sequence math, matrices, number theory	2400	x979
1106E	Lunar New Year and Red Envelopes data structures, dp	2100	x2558
1106D	Lunar New Year and a Wander data structures, dfs and similar, graphs, greedy, shortest paths	1500	x14720
1106C	Lunar New Year and Number Division greedy, implementation, math, sortings	900	x14678
1106B	Lunar New Year and Food Ordering data structures, implementation	1500	x6752
1106A	Lunar New Year and Cross Counting implementation	800	x12334
1105E	Helping Hiasat bitmasks, brute force, dp, meet-in-the-middle	2200	x1637
1105D	Kilani and the Game dfs and similar, graphs, implementation, shortest paths	1900	x4112
1105C	Ayoub and Lost Array combinatorics, dp, math	1500	x10354
1105B	Zuhair and Strings brute force, implementation, strings	1100	x9899
1105A	Salem and Sticks brute force, implementation	1100	x10942
1104B	Game with string data structures, implementation, math	1200	x14861
1104A	Splitting into digits constructive algorithms, implementation, math	800	x15402
1103E	Radix sum fft, math, number theory	3400	x234
1103D	Professional layer bitmasks, dp	3100	x407
1103C	Johnny Solving constructive algorithms, dfs and similar, graphs, math	2700	x844
1103B	Game with modulo binary search, constructive algorithms, interactive	2000	x3276
1103A	Grid game constructive algorithms, implementation	1400	x9769
1102F	Elongated Matrix binary search, bitmasks, brute force, dp, graphs	2000	x2001
1102E	Monotonic Renumeration combinatorics, sortings	1700	x5957
1102D	Balanced Ternary String greedy, strings	1500	x7986
1102C	Doors Breaking and Repairing games	1200	x13069
1102B	Array K-Coloring greedy, sortings	1400	x10398
1102A	Integer Sequence Dividing math	800	x24331
1101G	(Zero XOR Subset)-less math, matrices	2300	x1719
1101F	Trucks and Cities binary search, dp	2400	x1341
1101E	Polycarp's New Job implementation	1500	x7819
1101D	GCD Counting data structures, dfs and similar, dp, number theory, trees	2000	x4628
1101C	Division and Union sortings	1500	x8038
1101B	Accordion greedy, implementation	1300	x10497
1101A	Minimum Integer math	1000	x17244
1100F	Ivan and Burgers data structures, divide and conquer, greedy, math	2500	x2438
1100E	Andrew and Taxi binary search, dfs and similar, graphs	2200	x2371
1100D	Dasha and Chess constructive algorithms, games, interactive	2500	x855
1100C	NN and the Optical Illusion binary search, geometry, math	1200	x10094
1100B	Build a Contest data structures, implementation	1300	x11155
1100A	Roman and Browser implementation	1000	x10148
1099F	Cookies binary search, data structures, dfs and similar, dp, games, trees	2400	x947
1099C	Postcard constructive algorithms, implementation	1200	x9629
1099B	Squares and Segments binary search, constructive algorithms, math	1100	x11118
1099A	Snowball implementation	800	x12891
1098F	Ж-function string suffix structures, strings	3500	x227
1098E	Fedya the Potter binary search, implementation, math, number theory	3400	x222
1098D	Eels data structures	2800	x773
1098C	Construct a tree binary search, constructive algorithms, dfs and similar, graphs, greedy, trees	2400	x1081
1098B	Nice table brute force, constructive algorithms, greedy, math	2100	x1675
1098A	Sum in the tree constructive algorithms, dfs and similar, greedy, trees	1600	x8759
1097H	Mateusz and an Infinite Sequence bitmasks, brute force, dp, strings	3400	x94
1097G	Vladislav and a Great Legend combinatorics, dp, trees	3000	x726
1097F	Alex and a TV Show bitmasks, combinatorics, number theory	2500	x1255
1097E	Egor and an RPG game constructive algorithms, greedy	3400	x484
1097D	Makoto and a Blackboard dp, math, number theory, probabilities	2200	x2861
1097C	Yuhao and a Parenthesis greedy, implementation	1400	x8445
1097B	Petr and a Combination Lock bitmasks, brute force, dp	1200	x28704
1097A	Gennady and a Card Game brute force, implementation	800	x38800
1096G	Lucky Tickets divide and conquer, dp, fft	2400	x1491
1096F	Inversion Expectation dp, math, probabilities	2300	x1787
1096E	The Top Scorer combinatorics, dp, math, probabilities	2500	x1012
1096D	Easy Problem dp	1800	x8073
1096C	Polygon for the Angle brute force, geometry	1600	x6816
1096B	Substring Removal combinatorics, math, strings	1300	x10591
1096A	Find Divisible greedy, implementation, math	800	x18759
1095F	Make It Connected dsu, graphs, greedy	1900	x6154
1095E	Almost Regular Bracket Sequence implementation	1900	x4111
1095D	Circular Dance implementation	1600	x7555
1095C	Powers Of Two bitmasks, greedy	1400	x16834
1095B	Array Stabilization implementation	900	x21988
1095A	Repeating Cipher implementation	800	x31431
1093G	Multidimensional Queries bitmasks, data structures	2300	x1907
1093F	Vasya and Array dp	2400	x1006
1093E	Intersection of Permutations data structures	2400	x1616
1093D	Beautiful Graph dfs and similar, graphs	1700	x9102
1093C	Mishka and the Last Exam greedy	1300	x9351
1093B	Letters Rearranging constructive algorithms, greedy, sortings, strings	900	x16487