Problemset - Codeforces

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Codeforces Round 1097 (Div. 1, Based on Zhili Cup 2026)
31:21:47
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Before contest
Codeforces Round 1097 (Div. 2, Based on Zhili Cup 2026)
31:21:47
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Problems

#	Name
2218G	The 67th Iteration of "Counting is Fun" implementation, math	1800	x3584
2218F	The 67th Tree Problem constructive algorithms, implementation, trees	1500	x7232
2217H	Closer dfs and similar, dp, trees	2800	x200
2217G	Down the Pivot combinatorics, dp, math, trees	2600	x346
2217F	Interval Game bitmasks, combinatorics, constructive algorithms, dp, games, games, greedy, greedy, math, probabilities	2300	x695
2217E	Definitely Larger binary search, constructive algorithms, data structures, graphs, greedy, sortings	2000	x2061
2217D	Flip the Bit (Hard Version) greedy, implementation, math	1900	x3321
2215G	Maze trees	3500	x50
2215F	Research games	3500	x44
2215E	Star Map constructive algorithms, data structures, geometry, greedy, sortings	2700	x161
2215D	EXPloration, EXPloitation, and Gain Some EXPerience! bitmasks, brute force, dp, greedy, implementation	2800	x112
2215C	Oriented Journey bitmasks, brute force, communication, constructive algorithms, graphs, interactive, trees	2200	x617
2215B	RReeppeettiittiioonn binary search, brute force, implementation, math, number theory	2000	x991
2215A	Interval Mod constructive algorithms, dp, greedy, math	1700	x2450
2211H	Median Deletion	3500	x100
2211G	Rational Bubble Sort constructive algorithms, geometry, greedy	2900	x277
2211F	Learning Binary Search combinatorics, divide and conquer, dp, math	2400	x914
2211E	Minimum Path Cover brute force, dp, greedy, interactive, interactive, math, number theory, trees	2500	x854
2211D	AND-array bitmasks, combinatorics, math	1900	x2890
2211C2	Equal Multisets (Hard Version) constructive algorithms, dsu, greedy	1800	x3665
2210F	A Simple Problem binary search, data structures, greedy, math, trees	2700	x215
2210E	Binary Strings are Simple? constructive algorithms, implementation, interactive, number theory	2700	x316
2210D	A Simple RBS Problem constructive algorithms, math, strings, trees	2100	x2022
2210C2	A Simple GCD Problem (Hard Version) dp, greedy, number theory	2100	x2143
2209F	Dynamic Values And Maximum Sum data structures, data structures, greedy, implementation, trees	2700	x412
2209E	A Trivial String Problem brute force, dp, hashing, string suffix structures, strings	2200	x1761
2209D	Ghostfires constructive algorithms, greedy	1800	x5313
2209C	Find the Zero constructive algorithms, interactive	1400	x10621
2208E	Counting Cute Arrays combinatorics, dp	2700	x426
2208D2	Tree Orientation (Hard Version) dfs and similar, dsu, graphs, greedy, sortings, trees	2200	x1830
2208D1	Tree Orientation (Easy Version) constructive algorithms, dfs and similar, dsu, graphs, greedy, matrices, trees	1800	x4195
2207G	Toothless constructive algorithms, dfs and similar, dsu	3300	x155
2207F	Hanabi binary search, data structures, dp, dsu, flows, graph matchings, graphs, greedy	2900	x268
2207E2	N-MEX (Counting Version) combinatorics, constructive algorithms, math	2400	x861
2207E1	N-MEX (Constructive Version) constructive algorithms, greedy	2100	x1659
2207D	Boxed Like a Fish dfs and similar, dp, games, shortest paths, trees	2200	x2108
2207C	Where's My Water? data structures, divide and conquer, dp, math	1600	x5432
2207B	One Night At Freddy's games, greedy, sortings	1600	x5791
2206M	Deformed Balance	2900	x47
2206L	Onion	3500	x39
2206J	Worldwide Playlist math	1700	x1004
2206I	Growth Factor combinatorics, dp, math, number theory	2900	x166
2206H	Reflect Sort number theory	1800	x850
2206G	Extra Transition graphs	3100	x77
2206F	Minesweeper String fft, number theory	2400	x422
2206E	Parallel Sums data structures, geometry	2500	x404
2206D	Christmas Tree Un-decoration data structures, dp, trees	2600	x241
2206C	Upside Down Dijkstra dfs and similar	2200	x625
2206B	Subtree Removal Game binary search, games, trees	2500	x348
2206A	Compare Suffixes interactive	3500	x84
2205G	Simons and Diophantus Equation bitmasks, brute force, data structures, math, number theory	3000	x204
2205F	Simons and Reconstructing His Roads constructive algorithms, constructive algorithms, constructive algorithms, constructive algorithms, data structures, data structures, dsu, graphs	2400	x636
2205E	Simons and Dividing the Rhythm combinatorics, data structures, dp, dsu, math, string suffix structures, strings, strings, strings	2100	x1566
2205D	Simons and Beating Peaks data structures, data structures, divide and conquer, dp, dp, greedy, implementation, trees	1700	x4912
2205C	Simons and Posting Blogs greedy, greedy, greedy, sortings	1500	x7712
2204G	Grid Path dp, dp, graphs, matrices	2700	x406
2204F	Sum of Fractions binary search, brute force, combinatorics, data structures, greedy, math, number theory, two pointers	2200	x1222
2204E	Sum of Digits (and Again) brute force, constructive algorithms, math	1800	x4774
2204D	Alternating Path constructive algorithms, dfs and similar, graph matchings, graphs, graphs, graphs, graphs	1400	x8900
2203F	Binary Search with One Swap binary search, divide and conquer, dp, hashing, math, two pointers	2600	x414
2203E	Probabilistic Card Game binary search, data structures, games, greedy, math, ternary search	2200	x1419
2203D	Divisibility Game brute force, games, games, games, greedy, number theory, number theory	1700	x5420
2203C	Test Generator binary search, bitmasks, greedy, math	1500	x7006
2202G1	Monotone Monochrome Matrices (Easy Version) data structures, data structures, data structures, data structures	2500	x276
2201G	Codeforces Heuristic Contest 1001 constructive algorithms	3500	x65
2201F2	Monotone Monochrome Matrices (Hard Version) constructive algorithms, data structures, hashing, math	2800	x398
2201F1	Monotone Monochrome Matrices (Medium Version) data structures, hashing	2900	x270
2201E	ABBA Counting fft, fft, math, number theory, strings	2900	x277
2201D	Binary Not Search and Queries data structures, greedy, implementation	2500	x784
2201C	Rigged Bracket Sequence combinatorics, dp, greedy	2000	x1987
2201B	Recollect Numbers constructive algorithms	1700	x4947
2201A2	Lost Civilization (Hard Version) data structures, dp	1700	x5080
2200H	Six Seven divide and conquer, math, number theory, strings, strings, trees	2600	x454
2200G	Operation Permutation combinatorics, dp, math, probabilities	2200	x1027
2200F	Mooclear Reactor 2 brute force, data structures, greedy, implementation, sortings	1900	x2882
2200E	Divisive Battle games, greedy, math, number theory	1500	x8050
2199I	Strange Process *special problem	3000	x34
2199H	Sum of MEX *special problem, combinatorics, data structures, dp, math	2300	x90
2199G	Jammer *special problem, math	2500	x59
2199F	Self-Produced Sequences *special problem, combinatorics, math	2000	x149
2199E	Supersequence *special problem, binary search, greedy	2100	x183
2199D	Two Arrays *special problem, math	1800	x276
2199C	Minesweeper *special problem, constructive algorithms, greedy	1600	x408
2199B	Two Towers *special problem, greedy, math	1400	x877
2196F	Indivisible brute force, constructive algorithms, graphs	3300	x107
2196E2	Fuzzy Concatenation (Hard version) binary search, bitmasks, data structures, dp, greedy, string suffix structures	3000	x198
2196E1	Fuzzy Concatenation (Easy Version) binary search, bitmasks, brute force, data structures, greedy, string suffix structures	2900	x282
2196D	Double Bracket Sequence data structures, dp, expression parsing, flows, greedy, strings	2500	x992
2196C2	Interactive Graph (Hard Version) combinatorics, dfs and similar, dp, graphs, interactive	2000	x2517
2196C1	Interactive Graph (Simple Version) binary search, combinatorics, dfs and similar, dp, graphs, interactive	1800	x3588
2196B	Another Problem about Beautiful Pairs brute force, math, two pointers	1600	x8573
2195H	Codeforces Heuristic Contest 001 brute force, constructive algorithms, geometry, implementation	2400	x462
2195G	Idiot First Search and Queries binary search, data structures, dp, graphs, trees	2300	x1042
2195F	Parabola Independence dp, graphs, greedy, math, sortings	2000	x2699
2195E	Idiot First Search dfs and similar, dp, trees	1500	x8541
2194F2	Again Trees... (hard version) bitmasks, data structures, dfs and similar, dp, fft, trees	3000	x167
2194F1	Again Trees... (Easy Version) bitmasks, dfs and similar, dp, trees	2300	x885
2194E	The Turtle Strikes Back dp, graphs, greedy, implementation	2000	x2610
2194D	Table Cut constructive algorithms, greedy, implementation	1600	x7841
2193H	Remove the Grail Tree dfs and similar, dp, graphs, greedy, implementation, trees	2400	x1043

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