Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round 998 (Div. 3)
00:04:43
Register now »

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1936E	Yet Yet Another Permutation Problem divide and conquer, fft, math	3400	x126
1936D	Bitwise Paradox binary search, bitmasks, data structures, greedy, two pointers	3100	x537
1936C	Pokémon Arena data structures, graphs, greedy, implementation, shortest paths, sortings	2400	x1383
1936B	Pinball binary search, data structures, implementation, math, two pointers	2000	x3062
1936A	Bitwise Operation Wizard bitmasks, constructive algorithms, greedy, interactive, math	1700	x7726
1935F	Andrey's Tree binary search, constructive algorithms, data structures, dfs and similar, dsu, greedy, implementation, trees	2800	x463
1935E	Distance Learning Courses in MAC bitmasks, brute force, data structures, greedy, math	2400	x1432
1935D	Exam in MAC binary search, combinatorics, implementation, math	1800	x8543
1935C	Messenger in MAC binary search, brute force, constructive algorithms, data structures, dp, greedy, sortings	1800	x8476
1935B	Informatics in MAC constructive algorithms	1200	x19144
1935A	Entertainment in MAC constructive algorithms, strings	800	x28600
1934E	Weird LCM Operations brute force, constructive algorithms, number theory	3000	x251
1934D2	XOR Break --- Game Version bitmasks, games, greedy, interactive	2400	x1434
1934D1	XOR Break --- Solo Version bitmasks, constructive algorithms, greedy	2100	x3626
1934C	Find a Mine binary search, constructive algorithms, geometry, greedy, interactive, math	1700	x7115
1934B	Yet Another Coin Problem brute force, dp, greedy, math	1200	x19587
1934A	Too Min Too Max greedy, math	800	x25857
1933G	Turtle Magic: Royal Turtle Shell Pattern bitmasks, brute force, combinatorics, constructive algorithms, dfs and similar, math	2300	x1007
1933F	Turtle Mission: Robot and the Earthquake dfs and similar, dp, graphs, shortest paths	2100	x2575
1933E	Turtle vs. Rabbit Race: Optimal Trainings binary search, implementation, math, ternary search	1500	x11748
1933D	Turtle Tenacity: Continual Mods constructive algorithms, greedy, math, number theory, sortings	1200	x20946
1933C	Turtle Fingers: Count the Values of k brute force, implementation, math, number theory	1100	x23239
1933B	Turtle Math: Fast Three Task implementation, math, number theory	800	x33555
1933A	Turtle Puzzle: Rearrange and Negate greedy, math, sortings	800	x38924
1932G	Moving Platforms graphs, math, number theory, shortest paths	2300	x1123
1932F	Feed Cats data structures, dp, sortings	1900	x4344
1932E	Final Countdown implementation, math, number theory	1600	x8610
1932D	Card Game greedy, implementation	1400	x11883
1932C	LR-remainders brute force, data structures, implementation, math, two pointers	1400	x16358
1932B	Chaya Calendar number theory	1100	x21382
1932A	Thorns and Coins dp, greedy, implementation	800	x30425
1931G	One-Dimensional Puzzle combinatorics, math, number theory	2000	x2953
1931F	Chat Screenshots combinatorics, dfs and similar, graphs	1700	x8416
1931E	Anna and the Valentine's Day Gift games, greedy, math, sortings	1400	x16990
1931D	Divisible Pairs combinatorics, math, number theory	1300	x20289
1931C	Make Equal Again brute force, greedy, math	1000	x30032
1931B	Make Equal greedy	800	x32892
1931A	Recovering a Small String brute force, strings	800	x36939
1930I	Counting Is Fun combinatorics	3500	x75
1930H	Interactive Mex Tree constructive algorithms, dfs and similar, interactive, trees	3300	x208
1930G	Prefix Max Set Counting data structures, dp, trees	3100	x364
1930F	Maximize the Difference bitmasks, brute force, dfs and similar	2700	x745
1930E	2..3...4.... Wonderful! Wonderful! combinatorics, dp, math	2400	x1199
1930D2	Sum over all Substrings (Hard Version) bitmasks, divide and conquer, dp, dsu, greedy, implementation, strings	2100	x2732
1930D1	Sum over all Substrings (Easy Version) brute force, dp, greedy, strings	1800	x4279
1930C	Lexicographically Largest binary search, constructive algorithms, data structures, greedy, sortings	1700	x7333
1930B	Permutation Printing brute force, constructive algorithms, math	1000	x15872
1930A	Maximise The Score greedy, sortings	800	x18975
1929F	Sasha and the Wedding Binary Search Tree brute force, combinatorics, data structures, dfs and similar, math, trees	2300	x1842
1929E	Sasha and the Happy Tree Cutting bitmasks, brute force, dfs and similar, dp, graphs, greedy, math, trees	2300	x1756
1929D	Sasha and a Walk in the City combinatorics, dp, math, trees	1900	x4972
1929C	Sasha and the Casino binary search, brute force, constructive algorithms, games, greedy, math	1400	x15466
1929B	Sasha and the Drawing constructive algorithms, greedy, math	800	x25629
1929A	Sasha and the Beautiful Array constructive algorithms, greedy, math, sortings	800	x32292
1928F	Digital Patterns combinatorics, data structures, implementation, math	2900	x275
1928E	Modular Sequence brute force, constructive algorithms, dp, graphs, greedy, math, number theory	2300	x1780
1928D	Lonely Mountain Dungeons brute force, data structures, greedy, math, ternary search	1900	x4456
1928C	Physical Education Lesson brute force, math, number theory	1600	x8925
1928B	Equalize binary search, greedy, sortings, two pointers	1200	x18234
1928A	Rectangle Cutting geometry, math	800	x23111
1927G	Paint Charges data structures, dp, greedy, math	2300	x1745
1927F	Microcycle data structures, dfs and similar, dsu, graphs, greedy, implementation, sortings, trees	1900	x4581
1927E	Klever Permutation constructive algorithms, math, two pointers	1400	x14604
1927D	Find the Different Ones! binary search, brute force, data structures, dp, dsu, greedy, two pointers	1300	x22903
1927C	Choose the Different Ones! brute force, greedy, math	1000	x28726
1927B	Following the String constructive algorithms, greedy, strings	900	x34292
1927A	Make it White greedy, strings	800	x44812
1926G	Vlad and Trouble at MIT dfs and similar, dp, flows, graphs, greedy, implementation, trees	1900	x3769
1926F	Vlad and Avoiding X bitmasks, brute force, dfs and similar, dp, implementation	2200	x1782
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x12631
1926D	Vlad and Division bitmasks, greedy	1300	x16124
1926C	Vlad and a Sum of Sum of Digits dp, implementation	1200	x27901
1926B	Vlad and Shapes geometry, implementation	800	x33437
1926A	Vlad and the Best of Five implementation	800	x50923
1925D	Good Trip combinatorics, dp, math, probabilities	1900	x3783
1925B	A Balanced Problemset? brute force, greedy, math, number theory	1200	x20693
1925A	We Got Everything Covered! constructive algorithms, greedy, strings	800	x29376
1924F	Anti-Proxy Attendance constructive algorithms, dp, interactive, ternary search	3500	x158
1924E	Paper Cutting Again combinatorics, probabilities	3100	x445
1924D	Balanced Subsequences combinatorics, dp, math	2700	x1069
1924C	Fractal Origami geometry, math, matrices	2400	x1191
1924B	Space Harbour data structures, implementation, math, sortings	2100	x2663
1924A	Did We Get Everything Covered? constructive algorithms, dp, greedy, shortest paths, strings	1500	x14492
1923F	Shrink-Reverse binary search, brute force, greedy, hashing, implementation, string suffix structures, strings	2800	x388
1923E	Count Paths data structures, dfs and similar, dp, dsu, graphs, trees	2000	x4094
1923D	Slimes binary search, constructive algorithms, data structures, greedy, two pointers	1800	x7126
1923C	Find B constructive algorithms, greedy	1400	x15860
1923B	Monsters Attack! dp, greedy, implementation	1100	x18171
1923A	Moving Chips greedy, implementation	800	x25073
1922F	Replace on Segment dp, graph matchings	2500	x1460
1922E	Increasing Subsequences bitmasks, constructive algorithms, divide and conquer, greedy, math	1800	x7970
1922D	Berserk Monsters brute force, data structures, dsu, implementation, math	1900	x5893
1922C	Closest Cities greedy, implementation, math	1300	x19189
1922B	Forming Triangles combinatorics, constructive algorithms, math, sortings	1200	x21283
1922A	Tricky Template constructive algorithms, implementation, strings	800	x27475
1921G	Mischievous Shooter brute force, data structures, divide and conquer, dp, implementation	2200	x1277
1921F	Sum of Progression brute force, data structures, dp, implementation, math	1900	x4040
1921E	Eat the Chip brute force, games, greedy, math	1600	x10143
1921D	Very Different Array data structures, greedy, sortings, two pointers	1100	x22222
1921C	Sending Messages greedy, math	900	x30063