Problemset - Codeforces

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Codeforces Round 1097 (Div. 1, Based on Zhili Cup 2026)
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Before contest
Codeforces Round 1097 (Div. 2, Based on Zhili Cup 2026)
4 days
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binary search

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Problems

#	Name
2227G	Drowning binary search, data structures, math		x1082
2227F	It Just Keeps Going Sideways binary search, data structures, data structures, dp, dp, greedy, greedy, math, math		x2412
2227E	It All Went Sideways binary search, data structures, dp, greedy		x5380
2227D	Palindromex binary search, brute force, constructive algorithms, data structures, greedy, implementation, two pointers		x7730
2226C	Mental Monumental (Easy Version) binary search, data structures, greedy, math, two pointers		x5337
2225F	String Cutting binary search, brute force, brute force, greedy, hashing, string suffix structures, string suffix structures, strings, strings		x581
2222G	Statistics on Tree binary search, brute force, dfs and similar, dfs and similar, divide and conquer, graphs, trees, trees		x148
2222E	Seek the Truth binary search, bitmasks, constructive algorithms, interactive		x1884
2219B2	Unique Values (Hard version) binary search, bitmasks, constructive algorithms, interactive		x3160
2219B1	Unique Values (Easy version) binary search, constructive algorithms, divide and conquer, interactive, math		x3548
2218E	The 67th XOR Problem binary search, bitmasks, brute force	1200	x13864
2217E	Definitely Larger binary search, constructive algorithms, data structures, graphs, greedy, sortings	2000	x2031
2215B	RReeppeettiittiioonn binary search, brute force, implementation, math, number theory	2000	x968
2211C1	Equal Multisets (Easy Version) binary search, brute force, greedy, two pointers	1300	x9019
2210F	A Simple Problem binary search, data structures, greedy, math, trees	2700	x211
2207H1	Bowser's Castle (Easy Version) binary search, constructive algorithms, divide and conquer, greedy, interactive, trees		x51
2207F	Hanabi binary search, data structures, dp, dsu, flows, graph matchings, graphs, greedy	2900	x268
2206K	Time Display Stickers binary search	1300	x1386
2206B	Subtree Removal Game binary search, games, trees	2500	x345
2204F	Sum of Fractions binary search, brute force, combinatorics, data structures, greedy, math, number theory, two pointers	2200	x1218
2203F	Binary Search with One Swap binary search, divide and conquer, dp, hashing, math, two pointers	2600	x413
2203E	Probabilistic Card Game binary search, data structures, games, greedy, math, ternary search	2200	x1411
2203C	Test Generator binary search, bitmasks, greedy, math	1500	x6979
2199E	Supersequence *special problem, binary search, greedy	2100	x181
2197A	Friendly Numbers binary search, brute force, expression parsing, math, schedules	800	x22824
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
2196C1	Interactive Graph (Simple Version) binary search, combinatorics, dfs and similar, dp, graphs, interactive	1800	x3575
2195G	Idiot First Search and Queries binary search, data structures, dp, graphs, trees	2300	x1040
2193D	Monster Game binary search, sortings, two pointers	1100	x21528
2192C	All-in-one Gun binary search, greedy, math	1300	x10966
2187F1	Al Fine (Maximizing Version) binary search, data structures, divide and conquer, trees	3100	x212
2185H	BattleCows 2 binary search, brute force, data structures, dp, greedy	2500	x679
2185E	The Robotic Rush binary search, greedy, implementation, two pointers	1500	x10189
2184G	Nastiness of Segments binary search, data structures	1900	x2951
2184C	Huge Pile binary search, dfs and similar, dp, graphs, math	1100	x21815
2183H	Minimise Cost binary search, dp, greedy, sortings	3500	x159
2183C	War Strategy binary search, greedy, math, two pointers	1500	x10649
2182E	New Year's Gifts binary search, data structures, greedy, sortings, two pointers	1800	x5560
2181G	Greta's Game binary search, dp, graphs, greedy, math	2400	x647
2181D	Doorway binary search, data structures, sortings	2000	x1353
2181C	Cacti Classification binary search, constructive algorithms, interactive, math	3200	x147
2181A	Alphabet City binary search, math, strings	1300	x3715
2178E	Flatten or Concatenate binary search, divide and conquer, interactive	2000	x3684
2174E2	Game of Scientists (Version 2) binary search, chinese remainder theorem, dfs and similar, interactive, math	3200	x97
2173F	Isla's Memory Thresholds binary search, brute force, data structures, divide and conquer, math	2600	x560
2172C	Circles Are Far from Each Other binary search, greedy	3100	x95
2171H	Shiori Miyagi and Maximum Array Score binary search, data structures, dp, sortings	2400	x1012
2171F	Rae Taylor and Trees (hard version) binary search, constructive algorithms, data structures, dp, dsu, greedy, implementation, trees	1600	x7112
2171D	Rae Taylor and Trees (easy version) binary search, data structures, dp, dsu, greedy, implementation, trees	1400	x11556
2170C	Quotient and Remainder binary search, greedy, two pointers	1300	x11225
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	x8527
2168B	Locate binary search, combinatorics, communication, constructive algorithms, greedy, interactive		x1550
2167E	khba Loves to Sleep! binary search, data structures, geometry, greedy, implementation	1600	x9047
2164F2	Chain Prefix Rank (Hard Version) binary search, combinatorics, data structures, dfs and similar, dp, graphs, math, trees	2900	x422
2164C	Dungeon binary search, brute force, data structures, greedy, sortings	1400	x10678
2163D2	Diadrash (Hard Version) binary search, interactive, math, sortings	2500	x1495
2163D1	Diadrash (Easy Version) binary search, brute force, divide and conquer, implementation, interactive	2100	x2727
2162D	Beautiful Permutation binary search, interactive	1400	x12346
2161D	Locked Out binary search, data structures, dp, greedy	2100	x2766
2159F	Grand Finale: Snakes binary search, interactive, ternary search	3500	x134
2159D1	Inverse Minimum Partition (Easy Version) binary search, brute force, dp, geometry, greedy, math, two pointers	2500	x1017
2157E	Adjusting Drones binary search, brute force, data structures, dp, dsu, greedy, implementation, sortings	1900	x3564
2157D	Billion Players Game binary search, greedy, math, sortings, ternary search, two pointers	1600	x5992
2156E	Best Time to Buy and Sell Stock binary search, brute force, data structures, dp, games, graphs, greedy	2500	x959
2156D	Find the Last Number binary search, bitmasks, constructive algorithms, interactive	1900	x5368
2156B	Strange Machine binary search, brute force, greedy, implementation	1000	x20741
2154E	No Mind To Think binary search, divide and conquer, greedy, sortings, ternary search, two pointers	2500	x1202
2150E2	Hidden Single (Version 2) binary search, divide and conquer, interactive, math, probabilities	2800	x597
2149G	Buratsuta 3 binary search, brute force, data structures, divide and conquer, probabilities	2100	x2665
2149F	Nezuko in the Clearing binary search, math, ternary search	1900	x4801
2148G	Farmer John's Last Wish binary search, data structures, math, number theory	1900	x4188
2148E	Split binary search, data structures, two pointers	1200	x14026
2147E	Maximum OR Popcount binary search, bitmasks, brute force, data structures, greedy	2300	x2117
2146C	Wrong Binary Search binary search, constructive algorithms	1300	x13296
2145E	Predicting Popularity binary search, data structures, greedy, sortings	2100	x3062
2145C	Monocarp's String binary search, greedy, strings	1300	x15382
2143D2	Inversion Graph Coloring (Hard Version) binary search, combinatorics, data structures, dp, two pointers	2200	x2767
2137F	Prefix Maximum Invariance binary search, combinatorics, data structures, sortings	1900	x4052
2135C	By the Assignment binary search, bitmasks, combinatorics, dfs and similar, dsu, graphs, math	2000	x3881
2132E	Arithmetics Competition binary search, data structures, greedy, sortings, ternary search	1700	x7580
2132D	From 1 to Infinity binary search, dp, implementation, math	1600	x8811
2132C2	The Cunning Seller (hard version) binary search, greedy, math	1400	x13321
2131F	Unjust Binary Life binary search, data structures, greedy, greedy, math, sortings, two pointers	1900	x4715
2129C3	Interactive RBS (Hard Version) binary search, bitmasks, constructive algorithms, dp, interactive	2300	x1661
2129C2	Interactive RBS (Medium Version) binary search, bitmasks, constructive algorithms, interactive	2000	x2500
2129C1	Interactive RBS (Easy Version) binary search, bitmasks, constructive algorithms, interactive	1900	x3854
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	x6540
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
2126G2	Big Wins! (hard version) binary search, data structures, divide and conquer, dsu, trees, two pointers	2400	x1160
2126G1	Big Wins! (easy version) binary search, data structures, dp, dsu, two pointers	2200	x2479
2125F	Timofey and Docker binary search, divide and conquer, dp	3000	x397
2124G	Maximise Sum binary search, data structures	3200	x302
2123E	MEX Count binary search, data structures, greedy, sortings, two pointers	1400	x14888
2121H	Ice Baby binary search, brute force, data structures, dp, implementation, sortings	2300	x2237
2121F	Yamakasi binary search, brute force, data structures, greedy, two pointers	1800	x8115
2120E	Lanes of Cars binary search, dp, ternary search	2300	x1868

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