Problemset - Codeforces

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Codeforces Round 1097 (Div. 1, Based on Zhili Cup 2026)
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Codeforces Round 1097 (Div. 2, Based on Zhili Cup 2026)
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Problems

#	Name
704A	Thor brute force, data structures, implementation	1600	x10213
703E	Mishka and Divisors dp, number theory	2600	x670
703D	Mishka and Interesting sum data structures	2100	x4062
703C	Chris and Road geometry, implementation	2100	x1972
703B	Mishka and trip implementation, math	1400	x6054
703A	Mishka and Game implementation	800	x66558
702F	T-Shirts data structures	2800	x1922
702E	Analysis of Pathes in Functional Graph data structures, graphs	2100	x3106
702D	Road to Post Office math	1900	x3736
702C	Cellular Network binary search, implementation, two pointers	1500	x22830
702B	Powers of Two brute force, data structures, implementation, math	1500	x13622
702A	Maximum Increase dp, greedy, implementation	800	x54986
701C	They Are Everywhere binary search, strings, two pointers	1500	x19782
701B	Cells Not Under Attack data structures, math	1200	x12541
701A	Cards greedy, implementation	800	x21203
700E	Cool Slogans string suffix structures, strings	3300	x1390
700D	Huffman Coding on Segment data structures, greedy	3100	x526
700C	Break Up dfs and similar, graphs	2600	x1463
700B	Connecting Universities dfs and similar, dp, graphs, trees	1800	x4641
700A	As Fast As Possible binary search, math	1900	x3351
699B	One Bomb implementation	1400	x7949
699A	Launch of Collider implementation	1000	x18791
698F	Coprime Permutation combinatorics, number theory	3000	x490
698E	Cron	2800	x140
698D	Limak and Shooting Points brute force, geometry, math	2600	x581
698C	LRU bitmasks, dp, math, probabilities	2400	x1443
698B	Fix a Tree constructive algorithms, dfs and similar, dsu, graphs, trees	1700	x6181
698A	Vacations dp	1400	x37925
697B	Barnicle brute force, implementation, math, strings	1400	x5988
697A	Pineapple Incident implementation, math	900	x13352
696F	...Dary! binary search, geometry, two pointers	3300	x136
696E	...Wait for it... data structures, dsu, trees	3000	x629
696D	Legen... data structures, dp, matrices, strings	2500	x1614
696C	PLEASE combinatorics, dp, implementation, math, matrices	2000	x2217
696B	Puzzles dfs and similar, math, probabilities, trees	1700	x3800
696A	Lorenzo Von Matterhorn brute force, data structures, implementation, trees	1500	x6458
691F	Couple Cover brute force, dp, number theory	2200	x1437
691E	Xor-sequences matrices	1900	x3089
691D	Swaps in Permutation dfs and similar, dsu, math	1700	x6554
691C	Exponential notation implementation, strings	1800	x2969
691B	s-palindrome implementation, strings	1600	x8197
691A	Fashion in Berland implementation	1000	x11121
690F3	Tree of Life (hard) trees	3200	x59
690F2	Tree of Life (medium) constructive algorithms, hashing, trees	2700	x93
690F1	Tree of Life (easy)	1300	x2422
690E2	Photographs (II)	2600	x148
690E1	Photographs (I)	1800	x735
690D3	The Wall (hard) dp	2100	x630
690D2	The Wall (medium) combinatorics	1800	x1461
690D1	The Wall (easy)	1200	x2904
690C3	Brain Network (hard) trees	2200	x1010
690C2	Brain Network (medium) dfs and similar, graphs, trees	1500	x5007
690C1	Brain Network (easy)	1300	x3164
690B3	Recover Polygon (hard) data structures	2600	x111
690B2	Recover Polygon (medium) geometry	2600	x232
690B1	Recover Polygon (easy)	1700	x1010
690A3	Collective Mindsets (hard)	2400	x672
690A2	Collective Mindsets (medium)	2300	x747
690A1	Collective Mindsets (easy)	1100	x3094
689E	Mike and Geometry Problem combinatorics, data structures, dp, geometry, implementation	2000	x2130
689D	Friends and Subsequences binary search, data structures	2100	x4101
689C	Mike and Chocolate Thieves binary search, combinatorics, math	1700	x6174
689B	Mike and Shortcuts dfs and similar, graphs, greedy, shortest paths	1600	x6609
689A	Mike and Cellphone brute force, constructive algorithms, implementation	1400	x5489
688B	Lovely Palindromes constructive algorithms, math	1000	x36019
688A	Opponents implementation	800	x14783
687E	TOF dfs and similar, graphs	2900	x437
687D	Dividing Kingdom II brute force, data structures, dsu, graphs, sortings	2500	x1051
687C	The Values You Can Make dp	1900	x8334
687B	Remainders Game chinese remainder theorem, math, number theory	1800	x6831
687A	NP-Hard Problem dfs and similar, graphs	1500	x16481
686B	Little Robber Girl's Zoo constructive algorithms, implementation, sortings	1100	x8011
686A	Free Ice Cream constructive algorithms, implementation	800	x43400
685E	Travelling Through the Snow Queen's Kingdom bitmasks, brute force, divide and conquer, graphs	2800	x611
685D	Kay and Eternity brute force, implementation, sortings	2600	x517
685C	Optimal Point binary search, math	2900	x648
685B	Kay and Snowflake data structures, dfs and similar, dp, trees	1900	x5355
685A	Robbers' watch brute force, combinatorics, dp, math	1700	x4501
683J	The Hero with Bombs *special problem	3000	x46
683I	Loader *special problem, graphs	2500	x48
683H	Exchange of Books *special problem	1900	x124
683G	The Fraction *special problem	1900	x144
683F	Reformat the String *special problem	1800	x168
683E	Hammer throwing *special problem	1800	x202
683D	Chocolate Bar *special problem, math	1400	x385
683C	Symmetric Difference *special problem	1600	x335
683B	The Teacher of Physical Education *special problem	1600	x337
683A	The Check of the Point *special problem, geometry	1200	x1238
682E	Alyona and Triangles geometry, two pointers	2600	x715
682D	Alyona and Strings dp, strings	1900	x3514
682C	Alyona and the Tree dfs and similar, dp, graphs, trees	1600	x8080
682B	Alyona and Mex sortings	1200	x12747
682A	Alyona and Numbers constructive algorithms, math, number theory	1100	x23991
681E	Runaway to a Shadow geometry, sortings	2500	x504
681D	Gifts by the List constructive algorithms, dfs and similar, graphs, trees	2000	x1875
681C	Heap Operations constructive algorithms, data structures, greedy	1600	x9784
681B	Economy Game brute force	1300	x9436
681A	A Good Contest implementation	800	x16865
680B	Bear and Finding Criminals constructive algorithms, implementation	1000	x26236
680A	Bear and Five Cards constructive algorithms, implementation	800	x13292

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