Problemset - Codeforces

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Codeforces Round 1097 (Div. 1, Based on Zhili Cup 2026)
22:44:41
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Before contest
Codeforces Round 1097 (Div. 2, Based on Zhili Cup 2026)
22:44:41
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Problems

#	Name
303C	Minimum Modular brute force, graphs, math, number theory	2400	x967
303B	Rectangle Puzzle II implementation, math	1700	x1424
301E	Yaroslav and Arrangements dp	2800	x406
301D	Yaroslav and Divisors data structures	2200	x3022
301C	Yaroslav and Algorithm constructive algorithms	2500	x488
301B	Yaroslav and Time binary search, graphs, shortest paths	2100	x2795
301A	Yaroslav and Sequence constructive algorithms	1800	x3256
300E	Empire Strikes Back binary search, math, number theory	2300	x1105
300D	Painting Square dp, fft	2300	x855
300C	Beautiful Numbers brute force, combinatorics	1800	x11753
300B	Coach brute force, dfs and similar, graphs	1500	x7148
297E	Mystic Carvings data structures	3000	x433
297D	Color the Carpet constructive algorithms	2500	x628
297C	Splitting the Uniqueness constructive algorithms	2400	x1020
297B	Fish Weight constructive algorithms, greedy	1600	x3766
297A	Parity Game constructive algorithms	1700	x3860
296B	Yaroslav and Two Strings combinatorics, dp	2000	x2680
295E	Yaroslav and Points data structures	2500	x818
295D	Greg and Caves combinatorics, dp	2400	x740
295C	Greg and Friends combinatorics, dp, graphs, shortest paths	2100	x1939
295B	Greg and Graph dp, graphs, shortest paths	1700	x17654
295A	Greg and Array data structures, implementation	1400	x25998
294E	Shaass the Great dp, trees	2300	x1114
294D	Shaass and Painter Robot brute force, implementation, number theory	2500	x378
294C	Shaass and Lights combinatorics, number theory	1900	x4353
294B	Shaass and Bookshelf dp, greedy	1700	x5036
293E	Close Vertices data structures, divide and conquer, trees	2700	x1979
293D	Ksusha and Square geometry, math, probabilities, two pointers	2700	x261
293C	Cube Problem brute force, math, number theory	2400	x635
293B	Distinct Paths brute force, combinatorics	2700	x941
293A	Weird Game games, greedy	1500	x3196
292E	Copying Data data structures	1900	x4883
292D	Connected Components data structures, dfs and similar, dp, dsu	1900	x2770
292C	Beautiful IP Addresses brute force	2000	x1312
291E	Tree-String Problem *special problem, dfs and similar, hashing, strings	2000	x1577
291D	Parallel Programming *special problem, greedy	1600	x1539
291C	Network Mask *special problem, bitmasks, brute force, implementation	1600	x1852
290F	Greedy Petya *special problem, dfs and similar, graphs, greedy	2800	x153
290E	HQ *special problem, constructive algorithms	2500	x226
290D	Orange *special problem, implementation	1400	x1904
290C	WTF? *special problem, graph matchings, implementation, trees	1700	x1672
290B	QR code *special problem, implementation	1500	x2617
290A	Mysterious strings *special problem, implementation	1400	x3236
289B	Polo the Penguin and Matrix brute force, dp, implementation, sortings, ternary search	1400	x18962
288E	Polo the Penguin and Lucky Numbers dp, implementation, math	2800	x347
288D	Polo the Penguin and Trees combinatorics, dfs and similar, trees	2400	x838
288C	Polo the Penguin and XOR operation implementation, math	1700	x2457
288B	Polo the Penguin and Houses combinatorics	1500	x3211
287B	Pipeline binary search, math	1700	x11535
286E	Ladies' Shop constructive algorithms, fft, math	2800	x1020
286D	Tourists data structures, sortings	2600	x457
286C	Main Sequence greedy, implementation	2100	x1602
286B	Shifting implementation	2200	x1172
286A	Lucky Permutation constructive algorithms, math	1400	x3450
285E	Positions in Permutations combinatorics, dp, math	2600	x1294
285D	Permutation Sum bitmasks, combinatorics, dp, implementation, meet-in-the-middle	1900	x1675
284A	Cows and Primitive Roots implementation, math, number theory	1400	x7344
283E	Cow Tennis Tournament combinatorics, data structures, math	2800	x856
283D	Cows and Cool Sequences dp, math, number theory	2400	x641
283C	Coin Troubles dp	2100	x1566
283B	Cow Program dfs and similar, dp, graphs	1700	x3930
283A	Cows and Sequence constructive algorithms, data structures, implementation	1600	x6872
282E	Sausage Maximization bitmasks, data structures, trees	2200	x4327
282D	Yet Another Number Game dp, games	2100	x1614
282C	XOR and OR constructive algorithms, implementation, math	1500	x10180
282B	Painting Eggs greedy, math	1500	x13971
281B	Nearest Fraction brute force, implementation, two pointers	1700	x3412
280E	Sequence Transformation brute force, data structures, dp, implementation, math	3000	x261
280D	k-Maximum Subsequence Sum data structures, flows, graphs, implementation	2800	x1653
280C	Game on Tree implementation, math, probabilities, trees	2200	x5130
280B	Maximum Xor Secondary data structures, implementation, two pointers	1800	x5251
280A	Rectangle Puzzle geometry	2000	x1586
279E	Beautiful Decomposition dp, games, greedy, number theory	1900	x1603
279D	The Minimum Number of Variables bitmasks, dp	2200	x856
279C	Ladder dp, implementation, two pointers	1700	x8923
279B	Books binary search, brute force, implementation, two pointers	1400	x72397
279A	Point on Spiral brute force, geometry, implementation	1400	x5915
278B	New Problem brute force, strings	1500	x3639
277E	Binary Tree on Plane flows, trees	2400	x1479
277D	Google Code Jam dp, probabilities	2800	x372
277C	Game games, implementation	2400	x491
277B	Set of Points constructive algorithms, geometry	2300	x847
277A	Learning Languages dfs and similar, dsu	1400	x21575
276E	Little Girl and Problem on Trees data structures, graphs, trees	2100	x1859
276D	Little Girl and Maximum XOR bitmasks, dp, greedy, implementation, math	1700	x16366
276C	Little Girl and Maximum Sum data structures, greedy, implementation, sortings	1500	x39539
275B	Convex Shape constructive algorithms, implementation	1700	x3049
274E	Mirror Room data structures, implementation	3000	x341
274D	Lovely Matrix dfs and similar, graphs, greedy, sortings	2200	x1155
274C	The Last Hole! brute force, geometry	2600	x376
274B	Zero Tree dfs and similar, dp, greedy, trees	1800	x5571
274A	k-Multiple Free Set binary search, greedy, sortings	1500	x10812
273E	Dima and Game dp, games	2600	x401
273D	Dima and Figure dp	2400	x479
272E	Dima and Horses combinatorics, constructive algorithms, graphs	2200	x1296
272D	Dima and Two Sequences combinatorics, math, sortings	1600	x2834
272C	Dima and Staircase data structures, implementation	1500	x7200
272B	Dima and Sequence implementation, math	1400	x4289
271E	Three Horses constructive algorithms, math, number theory	2200	x598
271D	Good Substrings data structures, strings	1800	x14006

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