Problemset - Codeforces

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Educational Codeforces Round 173 (Rated for Div. 2)
33:33:31
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Problems

#	Name
1117G	Recursive Queries data structures	2500	x711
1117F	Crisp String bitmasks, dp	2500	x595
1117E	Decypher the String bitmasks, chinese remainder theorem, constructive algorithms, interactive, math	2200	x1537
1117D	Magic Gems dp, math, matrices	2100	x4410
1117C	Magic Ship binary search	1900	x7266
1117B	Emotes greedy, math, sortings	1000	x14570
1117A	Best Subsegment implementation, math	1100	x11059
1116D6	Hessenberg matrix *special problem		x79
1116D5	Creeper *special problem		x149
1116D4	TIE fighter *special problem		x169
1116D3	X-wing fighter *special problem		x203
1116D2	Pattern of increasing blocks *special problem		x233
1116D1	Block diagonal matrix *special problem		x275
1116C3	``Is the number of ones divisible by 3?'' oracle *special problem		x184
1116C2	``Is the bit string periodic?'' oracle *special problem		x186
1116C1	Alternating bits oracle *special problem		x264
1116B2	Not A, not B or not C? *special problem		x59
1116B1	Distinguish three-qubit states *special problem		x133
1116A2	Generate equal superposition of four basis states *special problem		x180
1116A1	Generate state \|00⟩ + \|01⟩ + \|10⟩ *special problem		x323
1115U3	Block unitary *special problem	1700	x198
1115U2	Chessboard unitary *special problem	1600	x235
1115U1	Anti-diagonal unitary *special problem	1500	x257
1115G3	Palindrome checker oracle *special problem	1600	x232
1115G2	OR oracle *special problem	1600	x312
1115G1	AND oracle *special problem	1100	x390
1114F	Please, another Queries on Array? bitmasks, data structures, divide and conquer, math, number theory	2400	x2029
1114E	Arithmetic Progression binary search, interactive, number theory, probabilities	2200	x2903
1114D	Flood Fill dp	1900	x6890
1114C	Trailing Loves (or L'oeufs?) brute force, implementation, math, number theory	1700	x7446
1114B	Yet Another Array Partitioning Task constructive algorithms, greedy, sortings	1500	x9022
1114A	Got Any Grapes? brute force, greedy, implementation	800	x18965
1113B	Sasha and Magnetic Machines greedy, number theory	1300	x7769
1113A	Sasha and His Trip dp, greedy, math	900	x17442
1111E	Tree data structures, dfs and similar, dp, graphs, trees	2500	x951
1111D	Destroy the Colony combinatorics, dp, math	2600	x976
1111C	Creative Snap binary search, brute force, divide and conquer, math	1700	x6341
1111B	Average Superhero Gang Power brute force, implementation, math	1700	x6309
1111A	Superhero Transformation implementation, strings	1000	x16961
1110H	Modest Substrings dp, strings	3500	x293
1110G	Tree-Tac-Toe constructive algorithms, games, trees	3100	x633
1110F	Nearest Leaf data structures, trees	2600	x1789
1110E	Magic Stones constructive algorithms, math, sortings	2200	x4214
1110D	Jongmah dp	2200	x3611
1110C	Meaningless Operations constructive algorithms, math, number theory	1500	x9465
1110B	Tape greedy, sortings	1400	x11908
1110A	Parity math	900	x15184
1109F	Sasha and Algorithm of Silence's Sounds data structures, trees	3200	x297
1109E	Sasha and a Very Easy Test data structures, number theory	2700	x556
1109D	Sasha and Interesting Fact from Graph Theory brute force, combinatorics, dp, math, trees	2400	x1358
1109C	Sasha and a Patient Friend binary search, data structures, implementation	2800	x260
1109B	Sasha and One More Name constructive algorithms, hashing, strings	1800	x4380
1109A	Sasha and a Bit of Relax dp, implementation	1600	x8559
1108F	MST Unification binary search, dsu, graphs, greedy	2100	x2988
1108E2	Array and Segments (Hard version) data structures, implementation	2100	x2230
1108E1	Array and Segments (Easy version) brute force, greedy, implementation	1800	x4578
1108D	Diverse Garland constructive algorithms, dp, greedy	1400	x15419
1108C	Nice Garland brute force, greedy, math	1300	x12046
1108B	Divisors of Two Integers brute force, greedy, math, number theory	1100	x23420
1108A	Two distinct points implementation	800	x22085
1107G	Vasya and Maximum Profit binary search, constructive algorithms, data structures, dp, dsu	2400	x1076
1107F	Vasya and Endless Credits dp, flows, graph matchings, graphs, sortings	2600	x818
1107E	Vasya and Binary String dp	2400	x2358
1107D	Compression dp, implementation, math, number theory	1800	x3742
1107C	Brutality greedy, sortings, two pointers	1300	x10041
1107B	Digital root math, number theory	1000	x16175
1107A	Digits Sequence Dividing greedy, strings	900	x12107
1106F	Lunar New Year and a Recursive Sequence math, matrices, number theory	2400	x997
1106E	Lunar New Year and Red Envelopes data structures, dp	2100	x2597
1106D	Lunar New Year and a Wander data structures, dfs and similar, graphs, greedy, shortest paths	1500	x15074
1106C	Lunar New Year and Number Division greedy, implementation, math, sortings	900	x14804
1106B	Lunar New Year and Food Ordering data structures, implementation	1500	x6778
1106A	Lunar New Year and Cross Counting implementation	800	x12391
1105E	Helping Hiasat bitmasks, brute force, dp, meet-in-the-middle	2200	x1679
1105D	Kilani and the Game dfs and similar, graphs, implementation, shortest paths	1900	x4162
1105C	Ayoub and Lost Array combinatorics, dp, math	1500	x10491
1105B	Zuhair and Strings brute force, implementation, strings	1100	x9951
1105A	Salem and Sticks brute force, implementation	1100	x11034
1104B	Game with string data structures, implementation, math	1200	x15151
1104A	Splitting into digits constructive algorithms, implementation, math	800	x15462
1103E	Radix sum fft, math, number theory	3400	x236
1103D	Professional layer bitmasks, dp	3100	x417
1103C	Johnny Solving constructive algorithms, dfs and similar, graphs, math	2700	x860
1103B	Game with modulo binary search, constructive algorithms, interactive	2000	x3299
1103A	Grid game constructive algorithms, implementation	1400	x9853
1102F	Elongated Matrix binary search, bitmasks, brute force, dp, graphs	2000	x2046
1102E	Monotonic Renumeration combinatorics, sortings	1700	x6100
1102D	Balanced Ternary String greedy, strings	1500	x8062
1102C	Doors Breaking and Repairing games	1200	x13190
1102B	Array K-Coloring greedy, sortings	1400	x10476
1102A	Integer Sequence Dividing math	800	x24692
1101G	(Zero XOR Subset)-less math, matrices	2300	x1756
1101F	Trucks and Cities binary search, dp	2400	x1377
1101E	Polycarp's New Job implementation	1500	x7960
1101D	GCD Counting data structures, dfs and similar, dp, number theory, trees	2000	x4766
1101C	Division and Union sortings	1500	x8288
1101B	Accordion greedy, implementation	1300	x10651
1101A	Minimum Integer math	1000	x17540
1100F	Ivan and Burgers data structures, divide and conquer, greedy, math	2500	x2605
1100E	Andrew and Taxi binary search, dfs and similar, graphs	2200	x2398