Problemset - Codeforces

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Codeforces Round 1097 (Div. 1, Based on Zhili Cup 2026)
20:47:19
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Before contest
Codeforces Round 1097 (Div. 2, Based on Zhili Cup 2026)
20:47:19
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constructive algorithms

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Problems

#	Name
2227D	Palindromex binary search, brute force, constructive algorithms, data structures, greedy, implementation, two pointers		x8547
2227C	Snowfall constructive algorithms, math		x14802
2226D	Reserved Reversals constructive algorithms, dp, greedy, math		x2157
2225E	Covering Points with Circles constructive algorithms, geometry, math		x1101
2222E	Seek the Truth binary search, bitmasks, constructive algorithms, interactive		x1933
2222D	Permutation Construction constructive algorithms, data structures, sortings		x3167
2219E	Weird Chessboard constructive algorithms, math		x95
2219B2	Unique Values (Hard version) binary search, bitmasks, constructive algorithms, interactive		x3199
2219B1	Unique Values (Easy version) binary search, constructive algorithms, divide and conquer, interactive, math		x3592
2219A	Grid L brute force, constructive algorithms, math, number theory		x8965
2218F	The 67th Tree Problem constructive algorithms, implementation, trees	1500	x7249
2218D	The 67th OEIS Problem constructive algorithms, greedy, greedy, greedy, math, math, number theory	1100	x18369
2218C	The 67th Permutation Problem constructive algorithms, greedy, math	800	x26369
2217F	Interval Game bitmasks, combinatorics, constructive algorithms, dp, games, games, greedy, greedy, math, probabilities	2300	x701
2217E	Definitely Larger binary search, constructive algorithms, data structures, graphs, greedy, sortings	2000	x2065
2215E	Star Map constructive algorithms, data structures, geometry, greedy, sortings	2700	x162
2215C	Oriented Journey bitmasks, brute force, communication, constructive algorithms, graphs, interactive, trees	2200	x620
2215A	Interval Mod constructive algorithms, dp, greedy, math	1700	x2472
2211G	Rational Bubble Sort constructive algorithms, geometry, greedy	2900	x278
2211C2	Equal Multisets (Hard Version) constructive algorithms, dsu, greedy	1800	x3668
2211B	Mickey Mouse Constructive constructive algorithms, dp, greedy, math	1100	x11607
2210E	Binary Strings are Simple? constructive algorithms, implementation, interactive, number theory	2700	x316
2210D	A Simple RBS Problem constructive algorithms, math, strings, trees	2100	x2026
2210A	A Simple Sequence constructive algorithms, dp, greedy, number theory	800	x22203
2209D	Ghostfires constructive algorithms, greedy	1800	x5316
2209C	Find the Zero constructive algorithms, interactive	1400	x10628
2208D1	Tree Orientation (Easy Version) constructive algorithms, dfs and similar, dsu, graphs, greedy, matrices, trees	1800	x4196
2208A	Bingo Candies constructive algorithms, math	800	x20188
2207H3	Bowser's Castle (Hard Version) constructive algorithms, divide and conquer, interactive, trees, two pointers		x56
2207H2	Bowser's Castle (Medium Version) constructive algorithms, divide and conquer, interactive, trees, two pointers		x39
2207H1	Bowser's Castle (Easy Version) binary search, constructive algorithms, divide and conquer, greedy, interactive, trees		x51
2207G	Toothless constructive algorithms, dfs and similar, dsu	3300	x155
2207E2	N-MEX (Counting Version) combinatorics, constructive algorithms, math	2400	x861
2207E1	N-MEX (Constructive Version) constructive algorithms, greedy	2100	x1660
2205F	Simons and Reconstructing His Roads constructive algorithms, constructive algorithms, constructive algorithms, constructive algorithms, data structures, data structures, dsu, graphs	2400	x637
2205A	Simons and Making It Beautiful brute force, constructive algorithms, constructive algorithms, constructive algorithms, constructive algorithms, constructive algorithms, constructive algorithms	800	x17284
2204E	Sum of Digits (and Again) brute force, constructive algorithms, math	1800	x4775
2204D	Alternating Path constructive algorithms, dfs and similar, graph matchings, graphs, graphs, graphs, graphs	1400	x8905
2201G	Codeforces Heuristic Contest 1001 constructive algorithms	3500	x65
2201F2	Monotone Monochrome Matrices (Hard Version) constructive algorithms, data structures, hashing, math	2800	x398
2201B	Recollect Numbers constructive algorithms	1700	x4948
2199C	Minesweeper *special problem, constructive algorithms, greedy	1600	x409
2196F	Indivisible brute force, constructive algorithms, graphs	3300	x107
2195H	Codeforces Heuristic Contest 001 brute force, constructive algorithms, geometry, implementation	2400	x464
2194D	Table Cut constructive algorithms, greedy, implementation	1600	x7845
2192E	Swap to Rearrange constructive algorithms, dfs and similar, graph matchings, graphs, graphs, graphs, greedy, strings	2100	x2076
2192B	Flipping Binary String constructive algorithms, strings	1000	x14542
2191B	MEX Reordering constructive algorithms, sortings	1000	x19899
2191A	Array Coloring constructive algorithms	800	x27767
2190B1	Sub-RBS (Easy Version) combinatorics, constructive algorithms, dp, greedy, strings, two pointers	1400	x10668
2190A	Sorting Game constructive algorithms, games, greedy	1200	x17127
2189E	Majority Wins? constructive algorithms, greedy, math, strings	2600	x818
2189C2	XOR-convenience (Hard Version) bitmasks, constructive algorithms, math	1800	x6206
2189C1	XOR Convenience (Easy Version) bitmasks, constructive algorithms, math	1300	x13892
2189B	The Curse of the Frog constructive algorithms, greedy, math	1200	x15307
2188A	Divisible Permutation constructive algorithms	800	x25901
2187B	Shortest Statement Ever bitmasks, constructive algorithms, dp, greedy	1800	x5283
2185A	Perfect Root constructive algorithms, math	800	x43058
2183I2	Pairs Flipping (Hard Version) constructive algorithms	3500	x69
2183I1	Pairs Flipping (Easy Version) constructive algorithms	3500	x82
2183G	Snake Instructions constructive algorithms, greedy, interactive	3200	x222
2183D2	Tree Coloring (Hard Version) combinatorics, constructive algorithms, data structures, dfs and similar, greedy, implementation, trees	2100	x2497
2183D1	Tree Coloring (Easy Version) constructive algorithms, dfs and similar, greedy, trees	1500	x8849
2183B	Yet Another MEX Problem constructive algorithms, greedy	1100	x16169
2182A	New Year String constructive algorithms, greedy, implementation, strings	800	x25323
2181K	Knit the Grid 2-sat, constructive algorithms, graphs, matrices	3500	x68
2181E	Elevator Against Humanity brute force, constructive algorithms, greedy, sortings	2900	x144
2181C	Cacti Classification binary search, constructive algorithms, interactive, math	3200	x148
2180C	XOR-factorization bitmasks, constructive algorithms, dp, greedy, number theory	1900	x6462
2179F	Blackslex and Another RGB Walking communication, constructive algorithms, graphs, interactive, number theory, trees	2000	x2747
2179E	Blackslex and Girls constructive algorithms, geometry, math	1800	x5777
2179D	Blackslex and Penguin Civilization bitmasks, constructive algorithms, greedy, math	1300	x13509
2178D	Xmas or Hysteria constructive algorithms, greedy, implementation, math	1700	x6697
2175B	XOR Array constructive algorithms, math	1300	x12216
2174E1	Game of Scientists (Version 1) chinese remainder theorem, constructive algorithms, interactive, math	3100	x134
2173E	Shiro's Mirror Duel constructive algorithms, greedy, interactive, probabilities, sortings	2200	x1534
2173C	Kanade's Perfect Multiples brute force, constructive algorithms, greedy, number theory	1400	x12375
2172N	New Kingdom constructive algorithms, graphs, implementation	2800	x163
2171F	Rae Taylor and Trees (hard version) binary search, constructive algorithms, data structures, dp, dsu, greedy, implementation, trees	1600	x7124
2171E	Anisphia Wynn Palettia and Good Permutations constructive algorithms, greedy, number theory	2000	x3651
2170D	Almost Roman constructive algorithms, greedy, implementation	2200	x1680
2168C	Intercepting Butterflies bitmasks, communication, constructive algorithms, graphs, interactive		x876
2168B	Locate binary search, combinatorics, communication, constructive algorithms, greedy, interactive		x1550
2168A1	Encode and Decode (Easy Version) communication, constructive algorithms, interactive		x5025
2167C	Isamatdin and His Magic Wand! constructive algorithms, greedy, implementation, sortings	800	x36048
2165E	Rainbow Branch constructive algorithms, dp, greedy, trees	3200	x255
2165A	Cyclic Merging constructive algorithms, greedy	1300	x14102
2164G	Pointless Machine constructive algorithms, graphs, interactive, trees	3300	x203
2163B	Siga ta Kymata constructive algorithms, greedy, implementation, math	1700	x9128
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	x9332
2162C	Beautiful XOR bitmasks, constructive algorithms, greedy	1100	x21319
2162B	Beautiful String brute force, constructive algorithms	1000	x27905
2161C	Loyalty constructive algorithms, greedy, sortings, two pointers	1200	x12544
2159A	MAD Interactive Problem constructive algorithms, implementation, interactive	1700	x8130
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
2158D	Palindrome Flipping brute force, constructive algorithms, graphs, implementation, shortest paths, strings	2000	x3281
2158B	Split constructive algorithms, greedy, math	1200	x13944

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