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
793B	Igor and his way to work dfs and similar, graphs, implementation, shortest paths	1600	x4828
793A	Oleg and shares implementation, math	900	x8014
792F	Mages and Monsters data structures, geometry	3100	x235
792E	Colored Balls greedy, math, number theory	2500	x1264
792D	Paths in a Complete Binary Tree bitmasks, trees	1900	x3396
792C	Divide by Three dp, greedy, math, number theory	2000	x4998
792B	Counting-out Rhyme implementation	1300	x6553
792A	New Bus Route implementation, sortings	1100	x9708
791A	Bear and Big Brother implementation	800	x257091
789B	Masha and geometric depression brute force, implementation, math	1700	x4927
789A	Anastasia and pebbles implementation, math	1100	x9822
788E	New task data structures	2900	x391
788D	Finding lines constructive algorithms, divide and conquer, interactive	3000	x409
788C	The Great Mixing dfs and similar, graphs, shortest paths	2300	x2579
788B	Weird journey combinatorics, constructive algorithms, dfs and similar, dsu, graphs	2100	x2887
788A	Functions again dp, two pointers	1600	x10202
787B	Not Afraid greedy, implementation, math	1300	x5768
787A	The Monster brute force, math, number theory	1200	x12184
786E	ALT data structures, flows, graphs, trees	3200	x753
786D	Rap God data structures, dfs and similar, hashing, strings, trees	3400	x168
786C	Till I Collapse data structures, divide and conquer	2400	x3699
786B	Legacy data structures, graphs, shortest paths	2300	x8015
786A	Berzerk dfs and similar, dp, games	2000	x2842
785E	Anton and Permutation brute force, data structures	2200	x2206
785D	Anton and School - 2 combinatorics, dp, math, number theory	2300	x3683
785C	Anton and Fairy Tale binary search, math	1600	x7818
785B	Anton and Classes greedy, sortings	1100	x10632
785A	Anton and Polyhedrons implementation, strings	800	x110905
784G	BF Calculator *special problem	2000	x773
784F	Crunching Numbers Just for You *special problem, implementation	1900	x1144
784E	Twisted Circuit *special problem, brute force, implementation	2000	x2039
784D	Touchy-Feely Palindromes *special problem, implementation	1900	x513
784C	INTERCALC *special problem, implementation	1800	x773
784B	Kids' Riddle *special problem	2000	x925
784A	Numbers Joke *special problem	1700	x3344
780H	Intranet of Buses binary search, geometry, implementation, two pointers	3100	x133
780G	Andryusha and Nervous Barriers data structures, dp	2700	x707
780F	Axel and Marston in Bitland bitmasks, dp, graphs, matrices	2400	x1270
780E	Underground Lab constructive algorithms, dfs and similar, graphs	2100	x2972
780D	Innokenty and a Football League 2-sat, graphs, greedy, implementation, shortest paths, strings	1900	x3043
780C	Andryusha and Colored Balloons dfs and similar, graphs, greedy, trees	1600	x10017
780B	The Meeting Place Cannot Be Changed binary search	1600	x12642
780A	Andryusha and Socks implementation	800	x22774
779C	Dishonest Sellers constructive algorithms, greedy, sortings	1200	x12774
779B	Weird Rounding brute force, greedy	1100	x10709
779A	Pupils Redistribution constructive algorithms, math	1000	x9702
778E	Selling Numbers dp, sortings	3000	x353
778D	Parquet Re-laying constructive algorithms	2700	x588
778C	Peterson Polyglot brute force, dfs and similar, dsu, hashing, strings, trees	2500	x983
778B	Bitwise Formula bitmasks, brute force, dfs and similar, expression parsing, implementation	1800	x2538
778A	String Game binary search, greedy, strings	1700	x12825
777E	Hanoi Factory brute force, data structures, dp, greedy, sortings	2000	x4750
777D	Cloud of Hashtags binary search, greedy, implementation, strings	1800	x5250
777C	Alyona and Spreadsheet binary search, data structures, dp, greedy, implementation, two pointers	1600	x6817
777B	Game of Credit Cards data structures, dp, greedy, sortings	1300	x9968
777A	Shell Game constructive algorithms, implementation, math	1000	x10884
776G	Sherlock and the Encrypted Data bitmasks, combinatorics, dp	2900	x368
776F	Sherlock's bet to Moriarty constructive algorithms, data structures, divide and conquer, geometry, graphs, implementation, trees	2800	x511
776E	The Holmes Children math, number theory	2100	x2439
776D	The Door Problem 2-sat, dfs and similar, dsu, graphs	2000	x6210
776C	Molly's Chemicals binary search, brute force, data structures, implementation, math	1800	x6246
776B	Sherlock and his girlfriend constructive algorithms, number theory	1200	x25710
776A	A Serial Killer brute force, implementation, strings	900	x12886
775A	University Schedule *special problem	2900
774L	Bars *special problem, binary search	2000	x389
774K	Stepan and Vowels *special problem, implementation, strings	1600	x1397
774J	Stepan's Series *special problem, dp	2000	x430
774I	Composing Of String *special problem, dp	2300	x157
774H	Repairing Of String *special problem, constructive algorithms	2200	x276
774G	Perfectionist Arkadiy *special problem, number theory	2700	x199
774F	Pens And Days Of Week *special problem, binary search, number theory	2700	x153
774E	Big Number and Remainder *special problem, math, number theory	2300	x262
774D	Lie or Truth *special problem, constructive algorithms, implementation, sortings	1500	x2113
774C	Maximum Number *special problem, constructive algorithms, greedy, implementation	1200	x4382
774B	Significant Cups *special problem, binary search, data structures, two pointers	2100	x295
774A	Amusement Park *special problem, ternary search	2100	x387
773F	Test Data Generation combinatorics, divide and conquer, dp, fft, math, number theory	3400	x218
773E	Blog Post Rating data structures, sortings	3000	x509
773D	Perishable Roads dp, graphs, shortest paths	2700	x801
773C	Prairie Partition binary search, constructive algorithms, greedy, math	2200	x996
773B	Dynamic Problem Scoring brute force, greedy	2000	x1216
773A	Success Rate binary search, math	1700	x4788
772E	Verifying Kingdom binary search, divide and conquer, interactive, trees	3200	x220
772D	Varying Kibibits bitmasks, dp	2700	x752
772C	Vulnerable Kerbals constructive algorithms, dp, graphs, math, number theory	2300	x1447
772B	Volatile Kite geometry	1800	x3478
772A	Voltage Keepsake binary search, math	1800	x4989
771F	Bear and Isomorphic Points geometry, two pointers	3300	x89
771E	Bear and Rectangle Strips dp, greedy	3000	x620
771D	Bear and Company dp	2500	x1621
771C	Bear and Tree Jumps dfs and similar, dp, trees	2100	x3552
771B	Bear and Different Names constructive algorithms, greedy	1500	x7183
771A	Bear and Friendship Condition dfs and similar, dsu, graphs	1500	x17727
770D	Draw Brackets! *special problem, implementation	1400	x1629
770C	Online Courses In BSU *special problem, dfs and similar, graphs, implementation	1500	x2931
770B	Maximize Sum of Digits *special problem, implementation, math	1300	x3065
770A	New Password *special problem, implementation	800	x21731
769D	k-Interesting Pairs Of Integers *special problem, bitmasks, brute force, meet-in-the-middle	1700	x2554
769C	Cycle In Maze *special problem, dfs and similar, graphs, greedy, shortest paths	1700	x3023
769B	News About Credit *special problem, greedy, two pointers	1200	x3442

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