Problemset - Codeforces

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Codeforces Round 1097 (Div. 1, Based on Zhili Cup 2026)
32:57:15
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Before contest
Codeforces Round 1097 (Div. 2, Based on Zhili Cup 2026)
32:57:15
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Problems

#	Name
2171H	Shiori Miyagi and Maximum Array Score binary search, data structures, dp, sortings	2400	x1014
2171G	Sakura Adachi and Optimal Sequences bitmasks, combinatorics, greedy, math	2000	x2324
2171F	Rae Taylor and Trees (hard version) binary search, constructive algorithms, data structures, dp, dsu, greedy, implementation, trees	1600	x7122
2171E	Anisphia Wynn Palettia and Good Permutations constructive algorithms, greedy, number theory	2000	x3651
2171D	Rae Taylor and Trees (easy version) binary search, data structures, dp, dsu, greedy, implementation, trees	1400	x11570
2171C2	Renako Amaori and XOR Game (hard version) bitmasks, games, greedy	1400	x11839
2170F	Build XOR on a Segment bitmasks, dp	2600	x779
2170E	Binary Strings and Blocks combinatorics, data structures, dp	2100	x2318
2170D	Almost Roman constructive algorithms, greedy, implementation	2200	x1680
2169F	Subsequence Problem combinatorics, dp, fft, math	2700	x333
2169E	Points Selection dp, greedy	2400	x1041
2169D2	Removal of a Sequence (Hard Version) binary search, divide and conquer, greedy, implementation, math, number theory	2100	x2269
2169D1	Removal of a Sequence (Easy Version) binary search, implementation, math, number theory	1500	x8538
2167G	Mukhammadali and the Smooth Array data structures, dp	1600	x11014
2167F	Tree, TREE!!! dfs and similar, dp, math, trees	1600	x7129
2167E	khba Loves to Sleep! binary search, data structures, geometry, greedy, implementation	1600	x9061
2165F	Arctic Acquisition data structures, greedy	3500	x194
2165E	Rainbow Branch constructive algorithms, dp, greedy, trees	3200	x255
2165D	Path Split graph matchings, greedy	2500	x896
2165C	Binary Wine bitmasks, greedy, math	2000	x3517
2165B	Marble Council dp, math, sortings	1900	x4532
2164H	PalindromePalindrome data structures, strings	3400	x43
2164G	Pointless Machine constructive algorithms, graphs, interactive, trees	3300	x203
2164F2	Chain Prefix Rank (Hard Version) binary search, combinatorics, data structures, dfs and similar, dp, graphs, math, trees	2900	x423
2164F1	Chain Prefix Rank (Easy Version) combinatorics, dfs and similar, dp, math, trees	2600	x650
2164E	Journey data structures, dfs and similar, dsu, graphs, greedy	2300	x1579
2164D	Copy String greedy, implementation, strings, two pointers	1800	x4960
2164C	Dungeon binary search, brute force, data structures, greedy, sortings	1400	x10695
2163E	Plegma bitmasks, combinatorics, communication, interactive	2700	x637
2163D2	Diadrash (Hard Version) binary search, interactive, math, sortings	2500	x1499
2163D1	Diadrash (Easy Version) binary search, brute force, divide and conquer, implementation, interactive	2100	x2728
2163C	Monopati brute force, combinatorics, dp, math, two pointers	1500	x9020
2163B	Siga ta Kymata constructive algorithms, greedy, implementation, math	1700	x9127
2162H	Beautiful Problem dp	2900	x314
2162G	Beautiful Tree constructive algorithms, math, probabilities, trees	2200	x2811
2162F	Beautiful Intervals constructive algorithms, greedy	2100	x2914
2162E	Beautiful Palindromes constructive algorithms, greedy, schedules	1600	x9331
2162D	Beautiful Permutation binary search, interactive	1400	x12360
2161H	Cycle Sort data structures	3500	x63
2161G	Bitwise And Equals bitmasks, greedy	3500	x91
2161F	SubMST combinatorics, graphs, trees	3000	x345
2161E	Left is Always Right combinatorics, implementation, math	2400	x782
2161D	Locked Out binary search, data structures, dp, greedy	2100	x2772
2161B	Make Connected brute force, implementation	1700	x5370
2159F	Grand Finale: Snakes binary search, interactive, ternary search	3500	x134
2159E	Super-Short-Polynomial-San math, meet-in-the-middle	3500	x201
2159D2	Inverse Minimum Partition (Hard Version) dp, greedy, math	3200	x394
2159D1	Inverse Minimum Partition (Easy Version) binary search, brute force, dp, geometry, greedy, math, two pointers	2500	x1019
2159C	Twin Polynomials combinatorics, graph matchings, math	2300	x1687
2159B	Rectangles brute force, data structures, dp, dsu, greedy, implementation, two pointers	2100	x2308
2159A	MAD Interactive Problem constructive algorithms, implementation, interactive	1700	x8129
2158F2	Distinct GCDs (Hard Version) combinatorics, constructive algorithms, graphs, math, number theory, number theory	3000	x249
2158F1	Distinct GCDs (Easy Version) constructive algorithms, graphs, math, number theory	2600	x403
2158E	Sink data structures, divide and conquer, dsu, graphs, implementation	2600	x625
2158D	Palindrome Flipping brute force, constructive algorithms, graphs, implementation, shortest paths, strings	2000	x3279
2158C	Annoying Game dp, games, greedy	1400	x11056
2157I	Hyper Smawk Bros dp, dp, games	3500	x171
2157H	Keygen 3 brute force, combinatorics, constructive algorithms, dfs and similar, math	3200	x116
2157G	Isaac's Queries bitmasks, brute force, constructive algorithms, dfs and similar, divide and conquer, dp, greedy, interactive, math, probabilities	2800	x411
2157F	Git Gud brute force, constructive algorithms, divide and conquer, math, ternary search	2400	x1290
2157E	Adjusting Drones binary search, brute force, data structures, dp, dsu, greedy, implementation, sortings	1900	x3568
2157D	Billion Players Game binary search, greedy, math, sortings, ternary search, two pointers	1600	x5998
2157C	Meximum Array 2 constructive algorithms, greedy, implementation, math	1400	x9241
2156F2	Strange Operation (Hard Version) data structures, greedy, trees	3000	x243
2156F1	Strange Operation (Easy Version) brute force, data structures, greedy, implementation, sortings	2200	x1617
2156E	Best Time to Buy and Sell Stock binary search, brute force, data structures, dp, games, graphs, greedy	2500	x960
2156D	Find the Last Number binary search, bitmasks, constructive algorithms, interactive	1900	x5370
2156C	Maximum GCD on Whiteboard greedy, math, number theory	1400	x12274
2155F	Juan's Colorful Tree data structures, dfs and similar, dfs and similar, dsu, graphs, graphs, meet-in-the-middle, trees	2800	x637
2155E	Mimo & Yuyu games, greedy, math	2200	x2832
2155D	Batteries brute force, constructive algorithms, graph matchings, graphs, interactive, math	1800	x5862
2155C	The Ancient Wizards' Capes brute force, greedy, implementation	1500	x10248
2154F2	Bombing (Hard Version) combinatorics, dp	3300	x175
2154F1	Bombing (Easy Version) brute force, combinatorics, constructive algorithms, implementation, math	2700	x565
2154E	No Mind To Think binary search, divide and conquer, greedy, sortings, ternary search, two pointers	2500	x1202
2154D	Catshock constructive algorithms, dfs and similar, graphs, trees, two pointers	1900	x4762
2154C2	No Cost Too Great (Hard Version) greedy, math, number theory	2000	x5509
2154C1	No Cost Too Great (Easy Version) greedy, implementation, math, number theory	1400	x13535
2153F	Odd Queries on Odd Array bitmasks, brute force, data structures, implementation, trees	2900	x323
2153E	Zero Trailing Factorial brute force, math, number theory	2400	x985
2153D	Not Alone dp, greedy	1800	x6291
2153C	Symmetrical Polygons constructive algorithms, geometry, greedy, implementation, sortings	1500	x11770
2152H2	Victorious Coloring (Hard Version) data structures, greedy, schedules	3500	x199
2152H1	Victorious Coloring (Easy Version) dfs and similar, dp, greedy	2900	x610
2152G	Query Jungle data structures, implementation, math, matrices, trees	2900	x712
2152F	Triple Attack data structures, greedy	2500	x1035
2152E	Monotone Subsequence constructive algorithms, graphs, greedy, interactive, math	2100	x2778
2152D	Division Versus Addition games, greedy, math	1700	x6745
2152C	Triple Removal data structures, greedy, math	1400	x12211
2151C	Incremental Stay greedy, implementation, math	1400	x10261
2150G	Counting Is Fun: The Finale combinatorics, implementation	3500	x82
2150F	Cycle Closing constructive algorithms, graphs, implementation, shortest paths, trees	3000	x203
2150E2	Hidden Single (Version 2) binary search, divide and conquer, interactive, math, probabilities	2800	x598
2150E1	Hidden Single (Version 1) divide and conquer, interactive, math, probabilities, sortings	2600	x1026
2150D	Attraction Theory combinatorics, dp, math	2700	x752
2150C	Limited Edition Shop data structures, dp	2100	x2653
2150B	Grid Counting combinatorics, implementation, math	1700	x6048
2149G	Buratsuta 3 binary search, brute force, data structures, divide and conquer, probabilities	2100	x2666
2149F	Nezuko in the Clearing binary search, math, ternary search	1900	x4812
2149E	Hidden Knowledge of the Ancients data structures, two pointers	1500	x9270

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