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)
2 days
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Problems

#	Name
557C	Arthur and Table brute force, data structures, dp, greedy, math, sortings	1900	x4213
557B	Pasha and Tea constructive algorithms, implementation, math, sortings	1500	x7485
557A	Ilya and Diplomas greedy, implementation, math	1100	x8506
556B	Case of Fake Numbers brute force, implementation	1100	x8189
556A	Case of the Zeros and Ones greedy	900	x46382
555E	Case of Computer Network dfs and similar, graphs, trees	2800	x2964
555D	Case of a Top Secret binary search, implementation, math	2500	x931
555C	Case of Chocolate data structures	2200	x2061
555B	Case of Fugitive data structures, greedy, sortings	2000	x4082
555A	Case of Matryoshkas implementation	1500	x6683
554B	Ohana Cleans Up brute force, greedy, strings	1200	x10859
554A	Kyoya and Photobooks brute force, math, strings	900	x14486
553E	Kyoya and Train dp, fft, graphs, math, probabilities	3200	x621
553D	Nudist Beach binary search, graphs, greedy	2300	x1084
553C	Love Triangles dfs and similar, dsu, graphs	2200	x1965
553B	Kyoya and Permutation binary search, combinatorics, constructive algorithms, greedy, implementation, math	1900	x2265
553A	Kyoya and Colored Balls combinatorics, dp, math	1500	x9830
552E	Vanya and Brackets brute force, dp, expression parsing, greedy, implementation, strings	2100	x1737
552D	Vanya and Triangles brute force, combinatorics, data structures, geometry, math, sortings	1900	x4850
552C	Vanya and Scales brute force, dp, greedy, math, meet-in-the-middle, number theory	1900	x5872
552B	Vanya and Books implementation, math	1200	x16070
552A	Vanya and Table implementation, math	1000	x10148
551E	GukiZ and GukiZiana binary search, data structures, implementation	2500	x2141
551D	GukiZ and Binary Operations combinatorics, implementation, math, matrices, number theory	2100	x2110
551C	GukiZ hates Boxes binary search, greedy	2200	x3988
551B	ZgukistringZ brute force, constructive algorithms, implementation, strings	1800	x4062
551A	GukiZ and Contest brute force, implementation, sortings	800	x17859
550E	Brackets in Implications constructive algorithms, greedy, implementation, math	2200	x1499
550D	Regular Bridge constructive algorithms, graphs, implementation	1900	x3781
550C	Divisibility by Eight brute force, dp, math	1500	x32125
550B	Preparing Olympiad bitmasks, brute force	1400	x27415
550A	Two Substrings brute force, dp, greedy, implementation, strings	1500	x43635
549H	Degenerate Matrix binary search, math	2100	x2092
549G	Happy Line constructive algorithms, greedy, sortings	2200	x2655
549F	Yura and Developers data structures, divide and conquer	2800	x1034
549E	Sasha Circle geometry, math	2700	x175
549D	Haar Features greedy, implementation	1900	x2253
549C	The Game Of Parity games	2200	x1826
549B	Looksery Party constructive algorithms, dfs and similar, graphs, greedy	2300	x1586
549A	Face Detection implementation, strings	900	x10155
548B	Mike and Fun brute force, dp, greedy, implementation	1400	x8988
548A	Mike and Fax brute force, implementation, strings	1100	x10330
547E	Mike and Friends data structures, string suffix structures, strings, trees	2800	x2603
547D	Mike and Fish constructive algorithms, dfs and similar, graphs	2600	x3117
547C	Mike and Foam bitmasks, combinatorics, dp, math, number theory	2300	x3401
547B	Mike and Feet binary search, data structures, dp, dsu	1900	x10891
547A	Mike and Frog brute force, greedy, implementation, math	2200	x2749
546E	Soldier and Traveling flows, graphs, math	2100	x4309
546D	Soldier and Number Game constructive algorithms, dp, math, number theory	1700	x13766
546C	Soldier and Cards brute force, dfs and similar, games	1400	x19431
546B	Soldier and Badges brute force, greedy, implementation, sortings	1200	x18606
546A	Soldier and Bananas brute force, implementation, math	800	x235083
545E	Paths and Trees graphs, greedy, shortest paths	2000	x5553
545D	Queue greedy, implementation, sortings	1300	x29497
545C	Woodcutters dp, greedy	1500	x32848
545B	Equidistant String greedy	1100	x12237
545A	Toy Cars implementation	900	x12152
544B	Sea and Islands constructive algorithms, implementation	1400	x8940
544A	Set of Strings implementation, strings	1100	x8810
543E	Listening to Music constructive algorithms, data structures	3200	x337
543D	Road Improvement dp, trees	2300	x3251
543C	Remembering Strings bitmasks, dp	2500	x1554
543B	Destroying Roads constructive algorithms, graphs, shortest paths	2100	x4578
543A	Writing Code dp	1800	x8836
542F	Quest dp, greedy	2100	x996
542E	Playing on Graph graphs, shortest paths	2600	x973
542D	Superhero's Job dfs and similar, dp, hashing, math, number theory	2600	x539
542C	Idempotent functions constructive algorithms, graphs, math	2000	x1265
542B	Duck Hunt data structures	3100	x230
542A	Place Your Ad Here data structures, sortings	2400	x620
540E	Infinite Inversions binary search, data structures, implementation, sortings, trees	2100	x2492
540D	Bad Luck Island dp, probabilities	1900	x6490
540C	Ice Cave dfs and similar	2000	x8232
540B	School Marks greedy, implementation	1700	x4980
540A	Combination Lock implementation	800	x35255
538H	Summer Dichotomy 2-sat, data structures, dfs and similar, greedy	3200	x735
538G	Berserk Robot constructive algorithms, math, sortings	3100	x576
538F	A Heap of Heaps brute force, data structures, math, sortings	2200	x1861
538E	Demiurges Play Again dfs and similar, dp, math, trees	2200	x1638
538D	Weird Chess brute force, constructive algorithms, implementation	1800	x2521
538C	Tourist's Notes binary search, brute force, greedy, implementation, math	1600	x6140
538B	Quasi Binary constructive algorithms, dp, greedy, implementation	1400	x19331
538A	Cutting Banner brute force, implementation	1400	x7377
536E	Tavas on the Path data structures, divide and conquer, trees	3100	x452
536D	Tavas in Kansas dp, games	2900	x788
535E	Tavas and Pashmaks geometry, math	2600	x864
535D	Tavas and Malekas greedy, hashing, string suffix structures, strings	1900	x4631
535C	Tavas and Karafs binary search, greedy, math	1900	x3988
535B	Tavas and SaDDas bitmasks, brute force, combinatorics, implementation	1100	x26657
535A	Tavas and Nafas brute force, implementation	1000	x13007
534F	Simplified Nonogram bitmasks, dp, hashing, meet-in-the-middle	2400	x533
534E	Berland Local Positioning System constructive algorithms, greedy, hashing, implementation	2400	x394
534D	Handshakes binary search, constructive algorithms, data structures, greedy	1900	x2575
534C	Polycarpus' Dice math	1600	x5274
534B	Covered Path dp, greedy, math	1400	x11343
534A	Exam constructive algorithms, implementation, math	1100	x12922
533F	Encoding hashing, string suffix structures, strings	2400	x955
533E	Correcting Mistakes constructive algorithms, dp, greedy, hashing, strings, two pointers	1800	x2433
533D	Landmarks data structures, dp	3000	x272
533C	Board Game games, greedy, implementation, math	1700	x2438

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