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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Problems

#	Name
2103A	Common Multiple brute force, greedy, implementation, math	800	x24938
2102B	The Picky Cat implementation, sortings	900	x19823
2102A	Dinner Time constructive algorithms, math	900	x21441
2101F	Shoo Shatters the Sunshine combinatorics, dp, trees	3300	x155
2101E	Kia Bakes a Cake data structures, dp, greedy, trees	3100	x273
2101D	Mani and Segments data structures, implementation, sortings, two pointers	2500	x1018
2101C	23 Kingdom binary search, brute force, data structures, greedy, ternary search, two pointers	2200	x2260
2101B	Quartet Swapping brute force, data structures, divide and conquer, greedy, sortings	1800	x6820
2101A	Mex in the Grid constructive algorithms, implementation	1300	x13415
2098B	Sasha and the Apartment Purchase math, sortings	1400	x7870
2098A	Vadim's Collection brute force, greedy	800	x14742
2097F	Lost Luggage dp, flows	3500	x185
2097E	Clearing the Snowdrift data structures, dfs and similar, dp, greedy	3100	x277
2097D	Homework bitmasks, math, matrices	2800	x554
2097C	Bermuda Triangle chinese remainder theorem, geometry, implementation, math, number theory	2400	x1024
2097B	Baggage Claim combinatorics, dfs and similar, dp, dsu, graphs, implementation, math, trees	2300	x1930
2097A	Sports Betting 2-sat, brute force, math, sortings	1400	x8573
2096H	Wonderful XOR Problem bitmasks, combinatorics, dp, fft, math	3200	x223
2096G	Wonderful Guessing Game bitmasks, constructive algorithms, interactive	3200	x420
2096F	Wonderful Impostors data structures, implementation, two pointers	3100	x458
2096E	Wonderful Teddy Bears greedy, implementation, sortings	2400	x2046
2096D	Wonderful Lightbulbs combinatorics, constructive algorithms, math	2000	x5596
2096C	Wonderful City dp, implementation	1700	x8222
2096B	Wonderful Gloves greedy, math, sortings	1100	x16563
2096A	Wonderful Sticks constructive algorithms, greedy	800	x20555
2095J	Premiere at a Wrong Time *special problem		x542
2095I	Mysterious Script *special problem, expression parsing, number theory		x639
2095H	Blurry Vision *special problem, fft, math		x840
2095G	Definitely a Geometry Problem *special problem, geometry		x960
2095F	⅓ оf а Рrоblеm *special problem, math		x837
2095E	Pair Count *special problem, number theory		x784
2095D	Where Am I? *special problem, geometry		x5301
2095C	Would It Be Unrated? *special problem, binary search, brute force		x3743
2095B	Plinko *special problem, games, interactive		x5992
2095A	Piecing It Together *special problem, string suffix structures		x13814
2094H	La Vaca Saturno Saturnita binary search, brute force, math, number theory	1900	x3785
2094G	Chimpanzini Bananini data structures, implementation, math	1700	x7843
2094F	Trulimero Trulicina constructive algorithms	1600	x11405
2094E	Boneca Ambalabu bitmasks	1200	x18547
2094D	Tung Tung Sahur greedy, strings, two pointers	1100	x23843
2094C	Brr Brrr Patapim math	900	x30469
2094B	Bobritto Bandito brute force, constructive algorithms	800	x33112
2094A	Trippi Troppi strings	800	x56209
2093G	Shorten the Array binary search, bitmasks, data structures, dfs and similar, greedy, strings, trees, two pointers	1900	x3796
2093F	Hackers and Neural Networks bitmasks, brute force, greedy	1800	x5881
2093E	Min Max MEX binary search, brute force, greedy	1500	x13425
2093D	Skibidi Table bitmasks, implementation	1400	x12264
2093C	Simple Repetition math, number theory	1000	x30824
2093B	Expensive Number greedy, math	900	x30820
2093A	Ideal Generator math	800	x40810
2092F	Andryusha and CCB brute force, constructive algorithms, greedy, math, number theory, strings	2900	x432
2092E	She knows... combinatorics, constructive algorithms, graphs, math	2100	x3841
2092D	Mishkin Energizer brute force, constructive algorithms, greedy, implementation, strings	1800	x6879
2092C	Asuna and the Mosquitoes constructive algorithms, greedy, math	1200	x22568
2092B	Lady Bug brute force, constructive algorithms, implementation, math	1000	x24797
2092A	Kamilka and the Sheep greedy, math, number theory, sortings	800	x28307
2091G	Gleb and Boating brute force, constructive algorithms, data structures, dp, graphs, greedy, math, number theory, shortest paths	2300	x1522
2091F	Igor and Mountain binary search, brute force, dp	1800	x6155
2091E	Interesting Ratio brute force, math, number theory, two pointers	1300	x19620
2091D	Place of the Olympiad binary search, greedy, math	1200	x23474
2091C	Combination Lock constructive algorithms, greedy	1000	x28809
2091B	Team Training dp, greedy, sortings	800	x32687
2091A	Olympiad Date greedy, strings	800	x39009
2090C	Dining Hall data structures, greedy, implementation, sortings	1700	x6304
2090B	Pushing Balls brute force, dp, implementation	1000	x16455
2090A	Treasure Hunt implementation, math	800	x21365
2089E	Black Cat Collapse	3500	x127
2089D	Conditional Operators constructive algorithms	3200	x188
2089C2	Key of Like (Hard Version) dp, math, probabilities	3100	x259
2089C1	Key of Like (Easy Version) dp, games, math, probabilities	2200	x1458
2089B2	Canteen (Hard Version) binary search, data structures, dp, flows, greedy, two pointers	2300	x1280
2089B1	Canteen (Easy Version) binary search, data structures, flows, greedy, two pointers	1900	x3231
2089A	Simple Permutation constructive algorithms, number theory	1700	x7187
2087I	Hamiltonian Partition special problem, special problem		x26
2087H	Nim with Special Numbers special problem, special problem		x28
2087G	Esports in Berland special problem, special problem, greedy, greedy		x89
2087F	Weapon Upgrade special problem, special problem, dp		x70
2087E	Color the Arrows special problem, special problem, dp, dp		x163
2087D	Uppercase or Lowercase? special problem, special problem, interactive		x267
2087C	Coin Game *special problem, greedy		x488
2087B	Showmatch *special problem		x570
2087A	Password Generator *special problem		x1053
2086F	Online Palindrome brute force, constructive algorithms, interactive	3000	x142
2086E	Zebra-like Numbers bitmasks, brute force, constructive algorithms, dfs and similar, dp, greedy, math	2400	x1664
2086D	Even String brute force, combinatorics, dp, math, strings	1700	x8359
2086C	Disappearing Permutation dfs and similar, dp, dsu, graphs, greedy, implementation	1300	x16113
2086B	Large Array and Segments binary search, brute force, greedy	1100	x18977
2086A	Cloudberry Jam math	800	x33521
2085F2	Serval and Colorful Array (Hard Version) data structures, greedy	2900	x521
2085F1	Serval and Colorful Array (Easy Version) data structures, greedy	2600	x781
2085E	Serval and Modulo constructive algorithms, math, number theory	2200	x3150
2085D	Serval and Kaitenzushi Buffet data structures, graph matchings, greedy	2000	x5301
2085C	Serval and The Formula bitmasks, constructive algorithms, dp, greedy	1600	x13547
2085B	Serval and Final MEX constructive algorithms, implementation	1200	x17085
2085A	Serval and String Theory constructive algorithms, implementation	900	x23539
2084H	Turtle and Nediam 2 dp, greedy	3500	x112
2084G2	Wish Upon a Satellite (Hard Version) data structures, dp	3500	x108
2084G1	Wish Upon a Satellite (Easy Version) dp, games	2600	x755
2084F	Skyscape constructive algorithms, data structures, greedy	2900	x508
2084E	Blossom binary search, combinatorics, dp, implementation, math, two pointers	2400	x1790

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