Problemset - Codeforces

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Before contest
Codeforces Round 941 (Div. 1)
4 days

Before contest
Codeforces Round 941 (Div. 2)
4 days

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Problems

#	Name
1927C	Choose the Different Ones! brute force, greedy, math	1000	x25247
1927B	Following the String constructive algorithms, greedy, strings	900	x29987
1927A	Make it White greedy, strings	800	x39262
1926G	Vlad and Trouble at MIT dfs and similar, dp, flows, graphs, greedy, implementation, trees	1900	x2871
1926F	Vlad and Avoiding X bitmasks, brute force, dfs and similar, dp, implementation	2200	x1436
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x9737
1926D	Vlad and Division bitmasks, greedy	1300	x13251
1926C	Vlad and a Sum of Sum of Digits dp, implementation	1200	x22591
1926B	Vlad and Shapes geometry, implementation	800	x29248
1926A	Vlad and the Best of Five implementation	800	x41066
1925D	Good Trip combinatorics, dp, math, probabilities	1900	x3174
1925B	A Balanced Problemset? brute force, greedy, math, number theory	1200	x18027
1925A	We Got Everything Covered! constructive algorithms, greedy, strings	800	x26967
1924F	Anti-Proxy Attendance constructive algorithms, dp, interactive, ternary search	3500	x122
1924E	Paper Cutting Again combinatorics, probabilities	3100	x382
1924D	Balanced Subsequences combinatorics, dp, math	2700	x743
1924C	Fractal Origami geometry, math, matrices	2400	x1023
1924B	Space Harbour data structures, implementation, math, sortings	2100	x2234
1924A	Did We Get Everything Covered? constructive algorithms, dp, greedy, shortest paths, strings	1500	x12149
1923F	Shrink-Reverse binary search, brute force, greedy, hashing, implementation, string suffix structures, strings	2800	x317
1923E	Count Paths data structures, dfs and similar, dp, dsu, graphs, trees	2000	x3087
1923D	Slimes binary search, constructive algorithms, data structures, greedy, two pointers	1800	x5752
1923C	Find B constructive algorithms, greedy	1400	x12845
1923B	Monsters Attack! dp, greedy, implementation	1100	x15941
1923A	Moving Chips greedy, implementation	800	x22991
1922F	Replace on Segment dp, graph matchings	2500	x1142
1922E	Increasing Subsequences bitmasks, constructive algorithms, divide and conquer, greedy, math	1800	x6948
1922D	Berserk Monsters brute force, data structures, dsu, implementation, math	1900	x5121
1922C	Closest Cities greedy, implementation, math	1300	x16675
1922B	Forming Triangles combinatorics, constructive algorithms, math, sortings	1200	x18808
1922A	Tricky Template constructive algorithms, implementation, strings	800	x25704
1921G	Mischievous Shooter brute force, data structures, divide and conquer, dp, implementation	2200	x1104
1921F	Sum of Progression brute force, data structures, dp, implementation, math	1900	x3395
1921E	Eat the Chip brute force, games, greedy, math	1600	x8788
1921D	Very Different Array data structures, greedy, sortings, two pointers	1100	x19803
1921C	Sending Messages greedy, math	900	x27028
1921B	Arranging Cats greedy, implementation	800	x31758
1921A	Square greedy, math	800	x39551
1920F2	Smooth Sailing (Hard Version) binary search, data structures, dsu, geometry, graphs, trees	3000	x392
1920F1	Smooth Sailing (Easy Version) binary search, brute force, data structures, dfs and similar, dsu, graphs, shortest paths	2500	x866
1920E	Counting Binary Strings combinatorics, dp, math	2100	x2320
1920D	Array Repetition binary search, brute force, dsu, implementation, math	1900	x5040
1920C	Partitioning the Array brute force, math, number theory	1600	x11656
1920B	Summation Game games, greedy, math, sortings	1100	x19086
1920A	Satisfying Constraints brute force, greedy, math	800	x26330
1919H	Tree Diameter interactive, trees	2000	x126
1919G	Tree LGM constructive algorithms, divide and conquer, games, trees	3500	x167
1919F2	Wine Factory (Hard Version) data structures, dp, flows, greedy, matrices	2800	x728
1919F1	Wine Factory (Easy Version) data structures, greedy	2300	x2003
1919E	Counting Prefixes combinatorics, constructive algorithms, dp, implementation, math	2600	x758
1919D	01 Tree constructive algorithms, data structures, dsu, greedy, sortings, trees	2100	x3560
1919C	Grouping Increases data structures, dp, greedy	1400	x16637
1919B	Plus-Minus Split greedy	800	x28686
1919A	Wallet Exchange games, math	800	x31539
1918G	Permutation of Given constructive algorithms, math	2700	x417
1918F	Caterpillar on a Tree dfs and similar, graphs, greedy, implementation, sortings, trees	2500	x761
1918E	ace5 and Task Order constructive algorithms, divide and conquer, implementation, interactive, probabilities, sortings	2200	x1527
1918D	Blocking Elements binary search, data structures, dp, implementation, two pointers	1900	x4195
1918C	XOR-distance bitmasks, greedy, implementation, math	1400	x12363
1918B	Minimize Inversions constructive algorithms, data structures, greedy, implementation, sortings	900	x21890
1918A	Brick Wall constructive algorithms, greedy, implementation, math	800	x28543
1917F	Construct Tree bitmasks, constructive algorithms, dp, trees	2500	x884
1917E	Construct Matrix constructive algorithms, math	2500	x1256
1917D	Yet Another Inversions Problem combinatorics, data structures, dp, implementation, math, number theory	2300	x1636
1917C	Watering an Array brute force, greedy, implementation, math	1600	x9276
1917B	Erase First or Second Letter brute force, combinatorics, data structures, dp, strings	1100	x19159
1917A	Least Product constructive algorithms, math	800	x24027
1916H2	Matrix Rank (Hard Version) combinatorics, dp, math, matrices, string suffix structures	2700	x499
1916H1	Matrix Rank (Easy Version) brute force, combinatorics, dp, math, matrices	2700	x581
1916G	Optimizations From Chelsu divide and conquer, dp, number theory, trees	3500	x132
1916F	Group Division constructive algorithms, dfs and similar, graphs, greedy	2900	x397
1916E	Happy Life in University data structures, dfs and similar, greedy, trees	2300	x2081
1916D	Mathematical Problem brute force, constructive algorithms, geometry, math	1700	x7816
1916C	Training Before the Olympiad constructive algorithms, games, greedy, implementation, math	1200	x16542
1916B	Two Divisors constructive algorithms, math, number theory	1000	x23415
1916A	2023 constructive algorithms, implementation, math, number theory	800	x24408
1915G	Bicycles graphs, greedy, implementation, shortest paths, sortings	1800	x5346
1915F	Greetings data structures, divide and conquer, sortings	1500	x11398
1915E	Romantic Glasses data structures, greedy, math	1300	x18176
1915D	Unnatural Language Processing greedy, implementation, strings	900	x27324
1915C	Can I Square? binary search, implementation	800	x37006
1915B	Not Quite Latin Square bitmasks, brute force, implementation	800	x38048
1915A	Odd One Out bitmasks, implementation	800	x48915
1914G2	Light Bulbs (Hard Version) combinatorics, data structures, dfs and similar, dp, graphs, hashing	2300	x1203
1914G1	Light Bulbs (Easy Version) brute force, combinatorics, dfs and similar, dp, dsu, graphs, math, trees	2100	x1648
1914F	Programming Competition dfs and similar, dp, graph matchings, greedy, trees	1900	x3625
1914E2	Game with Marbles (Hard Version) games, greedy, sortings	1400	x11100
1914E1	Game with Marbles (Easy Version) brute force, games, greedy, sortings	1400	x11024
1914D	Three Activities brute force, dp, greedy, implementation, sortings	1200	x17884
1914C	Quests greedy, math	1100	x20466
1914B	Preparing for the Contest constructive algorithms, math	800	x28348
1914A	Problemsolving Log implementation, strings	800	x29444
1913F	Palindromic Problem binary search, data structures, hashing, string suffix structures, strings	2800	x285
1913E	Matrix Problem flows, graphs	2400	x887
1913D	Array Collapse data structures, divide and conquer, dp, trees	2100	x2664
1913C	Game with Multiset binary search, bitmasks, brute force, greedy	1300	x13482
1913B	Swap and Delete strings	1000	x21347
1913A	Rating Increase implementation	800	x22138
1912L	LOL Lovers strings	800	x6209
1912K	Kim's Quest bitmasks, combinatorics, dp	1800	x1952