Problemset - Codeforces

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Codeforces Round (Div. 2)
6 days

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Problems

#	Name
1938L	XOR Operations	2800	x257
1938K	Tree Quiz	2400	x543
1938J	There and Back Again	2100	x1145
1938I	Symmetric Boundary	2800	x55
1938H	Pho Restaurant	1600	x1934
1938G	Personality Test	2300	x896
1938F	Forming Groups	2400	x670
1938E	Duplicates	2200	x888
1938D	Bánh Bò	3300	x82
1938C	Bit Counting Sequence	1900	x1312
1938B	Attraction Score	3000	x171
1938A	Antiparticle Antiphysics	3500	x43
1937B	Binary Path dp, greedy, implementation	1300	x13842
1937A	Shuffle Party implementation, math	800	x22190
1936F	Grand Finale: Circles binary search, geometry	3300	x74
1936E	Yet Yet Another Permutation Problem divide and conquer, fft, math	3400	x101
1936D	Bitwise Paradox binary search, bitmasks, data structures, greedy, two pointers	3100	x448
1936C	Pokémon Arena data structures, graphs, greedy, implementation, shortest paths, sortings	2400	x1159
1936B	Pinball binary search, data structures, implementation, math, two pointers	2000	x2573
1936A	Bitwise Operation Wizard bitmasks, constructive algorithms, greedy, interactive, math	1700	x6862
1935F	Andrey's Tree binary search, constructive algorithms, data structures, dfs and similar, dsu, greedy, implementation, trees	2800	x412
1935E	Distance Learning Courses in MAC bitmasks, brute force, data structures, greedy, math	2400	x1224
1935D	Exam in MAC binary search, combinatorics, implementation, math	1800	x7646
1935C	Messenger in MAC binary search, brute force, constructive algorithms, data structures, dp, greedy, sortings	1800	x7496
1935B	Informatics in MAC constructive algorithms	1200	x17283
1935A	Entertainment in MAC constructive algorithms, strings	800	x26485
1934E	Weird LCM Operations brute force, constructive algorithms, number theory	3000	x198
1934D2	XOR Break --- Game Version bitmasks, games, greedy, interactive	2400	x1252
1934D1	XOR Break --- Solo Version bitmasks, constructive algorithms, greedy	2100	x3213
1934C	Find a Mine binary search, constructive algorithms, geometry, greedy, interactive, math	1700	x6278
1934B	Yet Another Coin Problem brute force, dp, greedy, math	1200	x17511
1934A	Too Min Too Max greedy, math	800	x24235
1933G	Turtle Magic: Royal Turtle Shell Pattern bitmasks, brute force, combinatorics, constructive algorithms, dfs and similar, math	2300	x910
1933F	Turtle Mission: Robot and the Earthquake dfs and similar, dp, graphs, shortest paths	2100	x2295
1933E	Turtle vs. Rabbit Race: Optimal Trainings binary search, implementation, math, ternary search	1500	x10295
1933D	Turtle Tenacity: Continual Mods constructive algorithms, greedy, math, number theory, sortings	1200	x18716
1933C	Turtle Fingers: Count the Values of k brute force, implementation, math, number theory	1100	x21390
1933B	Turtle Math: Fast Three Task implementation, math, number theory	800	x30989
1933A	Turtle Puzzle: Rearrange and Negate greedy, math, sortings	800	x36568
1932G	Moving Platforms graphs, math, number theory, shortest paths	2300	x929
1932F	Feed Cats data structures, dp, sortings	1900	x3633
1932E	Final Countdown implementation, math, number theory	1600	x7376
1932D	Card Game greedy, implementation	1400	x10534
1932C	LR-remainders brute force, data structures, implementation, math, two pointers	1400	x14559
1932B	Chaya Calendar number theory	1100	x19374
1932A	Thorns and Coins dp, greedy, implementation	800	x27880
1931G	One-Dimensional Puzzle combinatorics, math, number theory	2000	x2555
1931F	Chat Screenshots combinatorics, dfs and similar, graphs	1700	x7310
1931E	Anna and the Valentine's Day Gift games, greedy, math, sortings	1400	x14170
1931D	Divisible Pairs combinatorics, math, number theory	1300	x16886
1931C	Make Equal Again brute force, greedy, math	1000	x27198
1931B	Make Equal greedy	800	x30891
1931A	Recovering a Small String brute force, strings	800	x34501
1930I	Counting Is Fun combinatorics	3500	x59
1930H	Interactive Mex Tree constructive algorithms, dfs and similar, interactive, trees	3300	x143
1930G	Prefix Max Set Counting data structures, dp, trees	3100	x316
1930F	Maximize the Difference bitmasks, brute force, dfs and similar	2700	x655
1930E	2..3...4.... Wonderful! Wonderful! combinatorics, dp, math	2400	x1042
1930D2	Sum over all Substrings (Hard Version) bitmasks, divide and conquer, dp, dsu, greedy, implementation, strings	2100	x2456
1930D1	Sum over all Substrings (Easy Version) brute force, dp, greedy, strings	1800	x3837
1930C	Lexicographically Largest binary search, constructive algorithms, data structures, greedy, sortings	1700	x6634
1930B	Permutation Printing brute force, constructive algorithms, math	1000	x14262
1930A	Maximise The Score greedy, sortings	800	x17766
1929F	Sasha and the Wedding Binary Search Tree brute force, combinatorics, data structures, dfs and similar, math, trees	2300	x1683
1929E	Sasha and the Happy Tree Cutting bitmasks, brute force, dfs and similar, dp, graphs, greedy, math, trees	2300	x1565
1929D	Sasha and a Walk in the City combinatorics, dp, math, trees	1900	x4344
1929C	Sasha and the Casino binary search, brute force, constructive algorithms, games, greedy, math	1400	x13809
1929B	Sasha and the Drawing constructive algorithms, greedy, math	800	x24336
1929A	Sasha and the Beautiful Array constructive algorithms, greedy, math, sortings	800	x29985
1928F	Digital Patterns combinatorics, data structures, implementation, math	2900	x222
1928E	Modular Sequence brute force, constructive algorithms, dp, graphs, greedy, math, number theory	2300	x1600
1928D	Lonely Mountain Dungeons brute force, data structures, greedy, math, ternary search	1900	x3923
1928C	Physical Education Lesson brute force, math, number theory	1600	x7907
1928B	Equalize binary search, greedy, sortings, two pointers	1200	x16059
1928A	Rectangle Cutting geometry, math	800	x21754
1927G	Paint Charges data structures, dp, greedy, math	2300	x1542
1927F	Microcycle data structures, dfs and similar, dsu, graphs, greedy, implementation, sortings, trees	1900	x4002
1927E	Klever Permutation constructive algorithms, math, two pointers	1400	x13002
1927D	Find the Different Ones! binary search, brute force, data structures, dp, dsu, greedy, two pointers	1300	x19284
1927C	Choose the Different Ones! brute force, greedy, math	1000	x26441
1927B	Following the String constructive algorithms, greedy, strings	900	x31372
1927A	Make it White greedy, strings	800	x40975
1926G	Vlad and Trouble at MIT dfs and similar, dp, flows, graphs, greedy, implementation, trees	1900	x3217
1926F	Vlad and Avoiding X bitmasks, brute force, dfs and similar, dp, implementation	2200	x1569
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x10826
1926D	Vlad and Division bitmasks, greedy	1300	x14396
1926C	Vlad and a Sum of Sum of Digits dp, implementation	1200	x24469
1926B	Vlad and Shapes geometry, implementation	800	x30873
1926A	Vlad and the Best of Five implementation	800	x44259
1925D	Good Trip combinatorics, dp, math, probabilities	1900	x3356
1925B	A Balanced Problemset? brute force, greedy, math, number theory	1200	x18878
1925A	We Got Everything Covered! constructive algorithms, greedy, strings	800	x27806
1924F	Anti-Proxy Attendance constructive algorithms, dp, interactive, ternary search	3500	x139
1924E	Paper Cutting Again combinatorics, probabilities	3100	x407
1924D	Balanced Subsequences combinatorics, dp, math	2700	x807
1924C	Fractal Origami geometry, math, matrices	2400	x1075
1924B	Space Harbour data structures, implementation, math, sortings	2100	x2352
1924A	Did We Get Everything Covered? constructive algorithms, dp, greedy, shortest paths, strings	1500	x12887
1923F	Shrink-Reverse binary search, brute force, greedy, hashing, implementation, string suffix structures, strings	2800	x345
1923E	Count Paths data structures, dfs and similar, dp, dsu, graphs, trees	2000	x3383