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
509A	Maximum in Table brute force, implementation	800	x44117
508E	Arthur and Brackets dp, greedy	2200	x1956
508D	Tanya and Password dfs and similar, graphs	2500	x4222
508C	Anya and Ghosts constructive algorithms, greedy	1600	x4667
508B	Anton and currency you all know greedy, math, strings	1300	x23986
508A	Pasha and Pixels brute force	1100	x8454
507E	Breaking Good dfs and similar, dp, graphs, shortest paths	2100	x3242
507D	The Maths Lecture dp, implementation	2200	x2125
507C	Guess Your Way Out! implementation, math, trees	1700	x4560
507B	Amr and Pins geometry, math	1400	x26678
507A	Amr and Music greedy, implementation, sortings	1000	x21737
506E	Mr. Kitayuta's Gift combinatorics, dp, matrices, strings	3000	x917
506D	Mr. Kitayuta's Colorful Graph brute force, dfs and similar, dsu, graphs	2400	x2535
505E	Mr. Kitayuta vs. Bamboos binary search, greedy	2900	x1559
505D	Mr. Kitayuta's Technology dfs and similar	2200	x2925
505C	Mr. Kitayuta, the Treasure Hunter dfs and similar, dp, two pointers	1900	x7300
505B	Mr. Kitayuta's Colorful Graph dfs and similar, dp, dsu, graphs	1400	x14975
505A	Mr. Kitayuta's Gift brute force, implementation, strings	1100	x6921
504E	Misha and LCP on Tree binary search, dfs and similar, hashing, string suffix structures, trees	3000	x1063
504D	Misha and XOR bitmasks	2700	x348
501E	Misha and Palindrome Degree binary search, combinatorics, implementation	2500	x951
501D	Misha and Permutations Summation data structures	2000	x2687
501C	Misha and Forest constructive algorithms, data structures, greedy, sortings, trees	1500	x6060
501B	Misha and Changing Handles data structures, dsu, strings	1100	x19417
501A	Contest implementation	900	x24286
500G	New Year Running number theory, trees	3200	x168
500F	New Year Shopping divide and conquer, dp	2700	x829
500E	New Year Domino data structures, dp, dsu	2300	x1582
500D	New Year Santa Network combinatorics, dfs and similar, graphs, trees	1900	x3277
500C	New Year Book Reading constructive algorithms, greedy, implementation, math	1600	x6032
500B	New Year Permutation dfs and similar, dsu, graphs, greedy, math, sortings	1600	x9599
500A	New Year Transportation dfs and similar, graphs, implementation	1000	x62660
499B	Lecture implementation, strings	1000	x44819
499A	Watching a movie greedy, implementation	1000	x14717
498E	Stairs and Lines dp, matrices	2700	x565
498D	Traffic Jams in the Land data structures, dp, number theory	2400	x1245
498C	Array and Operations flows, graph matchings, number theory	2100	x4185
498B	Name That Tune dp, probabilities, two pointers	2400	x1298
498A	Crazy Town geometry	1700	x6873
497E	Subsequences Return dp, matrices	2900	x317
497D	Gears brute force, geometry, math	2900	x247
496E	Distributing Parts greedy, sortings	2100	x1759
496D	Tennis Game binary search	1900	x3200
496C	Removing Columns brute force, constructive algorithms, implementation	1500	x8153
496B	Secret Combination brute force, constructive algorithms, implementation	1500	x6207
496A	Minimum Difficulty brute force, implementation, math	900	x17171
495B	Modular Equations math, number theory	1600	x8262
495A	Digital Counter implementation	1100	x8962
494E	Sharti data structures, games	3200	x374
494D	Birthday data structures, dfs and similar, dp, trees	2700	x668
494C	Helping People dp, probabilities	2600	x958
494B	Obsessive String dp, strings	2000	x3111
494A	Treasure greedy	1500	x6548
493E	Vasya and Polynomial math	2800	x517
493D	Vasya and Chess constructive algorithms, games, math	1700	x10199
493C	Vasya and Basketball binary search, brute force, data structures, implementation, sortings, two pointers	1600	x7504
493B	Vasya and Wrestling implementation	1400	x14068
493A	Vasya and Football implementation	1300	x6447
492E	Vanya and Field math	2000	x1755
492D	Vanya and Computer Game binary search, implementation, math, sortings	1800	x3322
492C	Vanya and Exams greedy, sortings	1400	x15463
492B	Vanya and Lanterns binary search, implementation, math, sortings	1200	x90146
492A	Vanya and Cubes implementation	800	x63522
491C	Deciphering flows, graph matchings	2300	x519
491B	New York Hotel greedy, math	2100	x655
491A	Up the hill constructive algorithms, implementation	1000	x3485
490F	Treeland Tour data structures, dfs and similar, dp, trees	2200	x1912
490E	Restoring Increasing Sequence binary search, brute force, greedy, implementation	2000	x1699
490D	Chocolate brute force, dfs and similar, math, meet-in-the-middle, number theory	1900	x2314
490C	Hacking Cypher brute force, math, number theory, strings	1700	x9472
490B	Queue dsu, implementation	1500	x6422
490A	Team Olympiad greedy, implementation, sortings	800	x70942
489F	Special Matrices combinatorics, dp	2100	x1939
489E	Hiking binary search, dp	2300	x1146
489D	Unbearable Controversy of Being brute force, combinatorics, dfs and similar, graphs	1700	x7048
489C	Given Length and Sum of Digits... dp, greedy, implementation	1400	x51664
489B	BerSU Ball dfs and similar, dp, graph matchings, greedy, sortings, two pointers	1200	x56718
489A	SwapSort greedy, implementation, sortings	1200	x10585
488B	Candy Boxes brute force, constructive algorithms, math	1900	x2263
488A	Giga Tower brute force	1100	x14943
487E	Tourists data structures, dfs and similar, graphs, trees	3200	x2839
487D	Conveyor Belts data structures	2700	x1005
487C	Prefix Product Sequence constructive algorithms, math, number theory	2300	x3079
487B	Strip binary search, data structures, dp, two pointers	2000	x4209
487A	Fight the Monster binary search, brute force, implementation	1800	x3952
486E	LIS of Sequence data structures, dp, greedy, hashing, math	2200	x2627
486D	Valid Sets dfs and similar, dp, math, trees	2100	x4380
486C	Palindrome Transformation brute force, greedy, implementation	1700	x12369
486B	OR in Matrix greedy, hashing, implementation	1300	x19167
486A	Calculating Function implementation, math	800	x154075
485B	Valuable Resources brute force, greedy	1300	x6791
485A	Factory implementation, math, matrices	1400	x8767
484E	Sign on Fence binary search, constructive algorithms, data structures	2500	x3029
484D	Kindergarten data structures, dp, greedy	2400	x3038
484C	Strange Sorting implementation, math	2600	x629
484B	Maximum Value binary search, math, sortings, two pointers	2100	x7731
484A	Bits bitmasks, constructive algorithms	1700	x13375
483B	Friends and Presents binary search, math	1800	x4341
483A	Counterexample brute force, implementation, math, number theory	1100	x24880
482E	ELCA data structures, trees	3200	x190

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