Problemset - Codeforces

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Codeforces Round 1097 (Div. 1, Based on Zhili Cup 2026)
31:17:34
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Before contest
Codeforces Round 1097 (Div. 2, Based on Zhili Cup 2026)
31:17:35
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Problems

#	Name
2148G	Farmer John's Last Wish binary search, data structures, math, number theory	1900	x4191
2148F	Gravity Falls greedy, implementation, sortings	1800	x6592
2147I2	Longest Increasing Path (Hard Version) constructive algorithms, math	3500	x104
2147I1	Longest Increasing Path (Easy Version) constructive algorithms, math	3300	x134
2147H	Maxflow GCD Coloring constructive algorithms, flows, graphs	3500	x189
2147G	Modular Tetration combinatorics, math, number theory	3100	x359
2147F	Exchange Queries combinatorics, data structures, greedy	2800	x665
2147E	Maximum OR Popcount binary search, bitmasks, brute force, data structures, greedy	2300	x2119
2147D	Game on Array games, greedy	1700	x7483
2147C	Rabbits constructive algorithms, dp, greedy, implementation	1500	x9738
2146F	Bubble Sort brute force, combinatorics, dp	2900	x302
2146E	Yet Another MEX Problem brute force, constructive algorithms, data structures, divide and conquer, greedy, hashing	2300	x2054
2146D2	Max Sum OR (Hard Version) bitmasks, constructive algorithms, divide and conquer, greedy	2000	x4034
2146D1	Max Sum OR (Easy Version) bitmasks, constructive algorithms, divide and conquer, greedy, trees	1500	x10454
2145G	Cost of Coloring combinatorics, divide and conquer, dp, fft, math	2900	x523
2145F	Long Journey dfs and similar, divide and conquer, dp, graphs, greedy, math, matrices, number theory	2500	x982
2145E	Predicting Popularity binary search, data structures, greedy, sortings	2100	x3066
2145D	Inversion Value of a Permutation constructive algorithms, dfs and similar, dp	1800	x6659
2144F	Bracket Groups brute force, constructive algorithms, dp, string suffix structures, strings	2700	x918
2144E2	Looking at Towers (difficult version) combinatorics, data structures, dp	2500	x1436
2144E1	Looking at Towers (easy version) combinatorics, dp	2200	x2557
2144D	Price Tags brute force, dp, math	1800	x6998
2143F	Increasing Xor bitmasks, data structures, math	2700	x424
2143E	Make Good constructive algorithms, greedy, math, strings	2400	x1922
2143D2	Inversion Graph Coloring (Hard Version) binary search, combinatorics, data structures, dp, two pointers	2200	x2769
2143D1	Inversion Graph Coloring (Easy Version) combinatorics, data structures, dp, greedy, two pointers	1800	x6393
2141I	Color the Tree *special problem	3500	x56
2141H	Merging Vertices in a Graph *special problem, dfs and similar, dsu, graphs	2700	x84
2141G	Good Robot Paths *special problem, data structures, geometry, sortings	2800	x62
2141F	Array Reduction *special problem, greedy	2200	x141
2141E	Perfect Cut *special problem, dp, greedy	2100	x257
2141D	Avoid Minimums *special problem, greedy, math	1800	x473
2141C	Minimum on Subarrays *special problem, brute force	1800	x345
2140F	Sum Minimisation number theory	2900	x313
2140E2	Prime Gaming (Hard Version) bitmasks, combinatorics, dp, probabilities	2500	x1237
2140E1	Prime Gaming (Easy Version) bitmasks, combinatorics, dp	2200	x2108
2140D	A Cruel Segment's Thesis data structures, greedy, sortings	2000	x4888
2140C	Ultimate Value data structures, games, greedy	1500	x12367
2138F	Ode to the Bridge Builder constructive algorithms, geometry	3500	x82
2138E2	Determinant Construction (Hard Version) brute force, constructive algorithms, math, matrices, number theory	3100	x184
2138E1	Determinant Construction (Easy Version) brute force, constructive algorithms, math, matrices, number theory	3100	x239
2138D	Antiamuny and Slider Movement brute force, combinatorics, implementation, math, sortings	2600	x640
2138C2	Maple and Tree Beauty (Hard Version) bitmasks, brute force, dfs and similar, dp, fft, trees	2000	x3367
2138C1	Maple and Tree Beauty (Easy Version) brute force, dfs and similar, dp, graphs, trees	1800	x5425
2138B	Antiamuny Wants to Learn Swap data structures, greedy, two pointers	1900	x5328
2137G	Cry Me a River dfs and similar, dp, games, graphs	2200	x1931
2137F	Prefix Maximum Invariance binary search, combinatorics, data structures, sortings	1900	x4057
2137E	Mexification brute force, implementation, math	1500	x10164
2135F	To the Infinity data structures, hashing, math, trees	3500	x246
2135E2	Beyond the Palindrome (Hard Version) combinatorics, dp, math, number theory	3500	x166
2135E1	Beyond the Palindrome (Easy Version) combinatorics, dp, math	3300	x247
2135D2	From the Unknown (Hard Version) brute force, constructive algorithms, interactive, math	2500	x990
2135D1	From the Unknown (Easy Version) constructive algorithms, interactive, math	2100	x2434
2135C	By the Assignment binary search, bitmasks, combinatorics, dfs and similar, dsu, graphs, math	2000	x3882
2135B	For the Champion constructive algorithms, interactive, math	1700	x7335
2134F	Permutation Oddness combinatorics, dp, math	2900	x647
2134E	Power Boxes constructive algorithms, dp, implementation, interactive	2300	x2398
2134D	Sliding Tree constructive algorithms, dfs and similar, greedy, implementation, trees	2300	x3642
2133F	Flint and Steel data structures, dp, graphs	3000	x466
2133E	I Yearned For The Mines constructive algorithms, dfs and similar, dp, greedy, trees	2500	x1695
2133D	Chicken Jockey dp, greedy	1900	x7485
2133C	The Nether graphs, interactive	1400	x12793
2132G	Famous Choreographer hashing, implementation, strings	2600	x515
2132F	Rada and the Chamomile Valley dfs and similar, graphs, shortest paths	2100	x2769
2132E	Arithmetics Competition binary search, data structures, greedy, sortings, ternary search	1700	x7588
2132D	From 1 to Infinity binary search, dp, implementation, math	1600	x8819
2132C2	The Cunning Seller (hard version) binary search, greedy, math	1400	x13332
2131H	Sea, You & copriMe brute force, constructive algorithms, graphs, greedy, math, number theory	2600	x886
2131G	Wafu! bitmasks, brute force, data structures, dfs and similar, dp, math	2000	x3770
2131F	Unjust Binary Life binary search, data structures, greedy, greedy, math, sortings, two pointers	1900	x4720
2131E	Adjacent XOR brute force, greedy	1400	x17113
2131D	Arboris Contractio data structures, graphs, greedy, trees	1400	x14320
2129F2	Top-K Tracker (Hard Version) interactive, interactive	3500	x97
2129F1	Top-K Tracker (Easy Version) interactive	3500	x134
2129E	Induced Subgraph Queries data structures, graphs, sortings	3000	x476
2129D	Permutation Blackhole brute force, combinatorics, dp, implementation, math	2600	x945
2129C3	Interactive RBS (Hard Version) binary search, bitmasks, constructive algorithms, dp, interactive	2300	x1663
2129C2	Interactive RBS (Medium Version) binary search, bitmasks, constructive algorithms, interactive	2000	x2502
2129C1	Interactive RBS (Easy Version) binary search, bitmasks, constructive algorithms, interactive	1900	x3857
2129B	Stay or Mirror brute force, data structures, dp, greedy, sortings	1600	x13256
2128F	Strict Triangle graphs, greedy, shortest paths	3200	x378
2128E2	Submedians (Hard Version) binary search, constructive algorithms, data structures, math, two pointers	2600	x795
2128E1	Submedians (Easy Version) binary search, data structures, dp, greedy, math	1900	x6541
2128D	Sum of LDS brute force, combinatorics, dp, greedy, math	1600	x12283
2127H	23 Rises Again brute force, dfs and similar, dp, flows, graph matchings, graphs, greedy, implementation, probabilities, trees	3100	x570
2127G2	Inter Active (Hard Version) binary search, bitmasks, constructive algorithms, graphs, implementation, interactive, math, probabilities	3500	x107
2127G1	Inter Active (Easy Version) binary search, constructive algorithms, interactive, probabilities	3400	x101
2127F	Hamed and AghaBalaSar brute force, combinatorics, dp, math, probabilities	2800	x1057
2127E	Ancient Tree constructive algorithms, data structures, dfs and similar, dsu, greedy, trees	2100	x2737
2127D	Root was Built by Love, Broken by Destiny combinatorics, dfs and similar, graphs, trees	1800	x6186
2127C	Trip Shopping games, greedy, sortings	1400	x12380
2126G2	Big Wins! (hard version) binary search, data structures, divide and conquer, dsu, trees, two pointers	2400	x1161
2126G1	Big Wins! (easy version) binary search, data structures, dp, dsu, two pointers	2200	x2480
2126F	1-1-1, Free Tree! brute force, data structures, dfs and similar, graphs, implementation, trees	2000	x4302
2126E	G-C-D, Unlucky! math, number theory	1400	x17009
2125F	Timofey and Docker binary search, divide and conquer, dp	3000	x397
2125E	Sets of Complementary Sums brute force, combinatorics, dp, math, two pointers	2500	x1416
2125D	Segments Covering dp, math, probabilities	1600	x9271
2124I	Lexicographic Partition constructive algorithms, math, trees	3500	x203
2124H	Longest Good Subsequence dp, math, trees	3400	x188

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