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
219D	Choosing Capital for Treeland dfs and similar, dp, graphs, trees	1700	x12478
219C	Color Stripe brute force, dp, greedy	1600	x7156
217C	Formurosa divide and conquer, dp, expression parsing	2600	x368
215E	Periodical Numbers combinatorics, dp, number theory	2100	x672
213C	Relay Race dp	2000	x3253
213B	Numbers combinatorics, dp	1900	x1979
212E	IT Restaurants dfs and similar, dp, trees	1500	x2196
212C	Cowboys combinatorics, dp, math	2100	x486
209A	Multicolored Marbles dp, math	1600	x2845
208C	Police Station dp, graphs, shortest paths	1900	x2151
208B	Solitaire dfs and similar, dp	1900	x1496
204D	Little Elephant and Retro Strings dp	2400	x637
204A	Little Elephant and Interval binary search, combinatorics, dp	1500	x6589
201D	Brand New Problem bitmasks, brute force, dp	2600	x454
201C	Fragile Bridges dp	2000	x1513
201A	Clear Symmetry constructive algorithms, dp, math	1700	x3246
191A	Dynasty Puzzles dp	1500	x4553
189A	Cut Ribbon brute force, dp	1300	x80829
187B	AlgoRace dp, shortest paths	1800	x2343
185C	Clever Fat Rat dp	2500	x151
183D	T-shirt dp, greedy, probabilities	2700	x481
182E	Wooden Fence dp	1800	x1665
180E	Cubes binary search, dp, two pointers	1800	x2067
180C	Letter dp	1400	x8558
178F2	Representative Sampling dp, sortings, strings	2200	x384
176D	Hyper String dp	2500	x381
176B	Word Cut dp	1700	x2387
175E	Power Defence brute force, dp, geometry, greedy	2600	x288
175D	Plane of Tanks: Duel brute force, dp, math, probabilities	2400	x319
174B	File List dp, greedy, implementation	1400	x2513
173C	Spiral Maximum brute force, dp	1900	x1111
167B	Wizards and Huge Prize dp, math, probabilities	1800	x2450
166E	Tetrahedron dp, math, matrices	1500	x25609
166D	Shoe Store dp, graph matchings, greedy, sortings, two pointers	2500	x391
165E	Compatible Numbers bitmasks, brute force, dfs and similar, dp	2200	x9375
165C	Another Problem on Strings binary search, brute force, dp, math, strings, two pointers	1600	x13819
163E	e-Government data structures, dfs and similar, dp, strings, trees	2800	x2184
163A	Substring and Subsequence dp	1700	x2995
161E	Polycarpus the Safecracker brute force, dp	2500	x507
161D	Distance in Tree dfs and similar, dp, trees	1800	x19166
159D	Palindrome pairs *special problem, brute force, dp, strings	1500	x4685
158E	Phone Talks *special problem, dp, sortings	1900	x1538
156E	Mrs. Hudson's Pancakes brute force, dp	3000	x176
156C	Cipher combinatorics, dp	2000	x2624
152E	Garden bitmasks, dp, graphs, trees	2500	x569
150D	Mission Impassable dp, strings	2600	x738
149D	Coloring Brackets dp	1900	x4607
148E	Porcelain dp	1900	x4868
148D	Bag of mice dp, games, math, probabilities	1800	x8896
145C	Lucky Subsequence combinatorics, dp, math	2100	x2174
142C	Help Caretaker brute force, dp	2300	x997
141E	Clearing Up constructive algorithms, dp, dsu, graphs	2300	x1366
140E	New Year Garland combinatorics, dp	2600	x1037
138E	Hellish Constraints brute force, dp, two pointers	2900	x188
138D	World of Darkraft dp, games	2500	x592
137D	Palindromes dp, strings	1900	x1722
132D	Constants in the language of Shakespeare constructive algorithms, dp, greedy	2100	x724
132C	Logo Turtle dp	1800	x2643
128C	Games with Rectangle combinatorics, dp	2000	x3244
126D	Fibonacci Sums dp, math	2300	x946
126B	Password binary search, dp, hashing, string suffix structures, strings	1700	x24734
123E	Maze dfs and similar, dp, probabilities, trees	2500	x803
123C	Brackets combinatorics, dp, greedy	2300	x721
120F	Spiders dp, greedy, trees	1400	x4128
119C	Education Reform dp	2000	x1044
118D	Caesar's Legions dp	1700	x20466
115E	Linear Kingdom Races data structures, dp	2400	x2200
115D	Unambiguous Arithmetic Expression dp, expression parsing	2600	x454
111D	Petya and Coloring combinatorics, dp	2300	x901
111C	Petya and Spiders bitmasks, dp, dsu	2100	x1583
109C	Lucky Tree dp, dsu, trees	1900	x4117
107D	Crime Management dp, graphs, matrices	2400	x487
107C	Arrangement bitmasks, dp	2400	x460
107B	Basketball Team combinatorics, dp, math, probabilities	1600	x4272
106C	Buns dp	1700	x7059
101E	Candies and Stones divide and conquer, dp	2500	x604
101D	Castle dp, greedy, probabilities, sortings, trees	2300	x790
101B	Buses binary search, data structures, dp	1700	x3193
98E	Help Shrek and Donkey dp, games, math, probabilities	2700	x558
95E	Lucky Country dp, dsu, graphs	2500	x1902
95D	Horse Races dp, math	2500	x502
95B	Lucky Numbers dp, greedy	1800	x1399
93E	Lostborn dp, math, number theory	2600	x540
93D	Flags dp, math, matrices	2500	x444
89B	Widget Library dp, expression parsing, graphs, implementation	2300	x610
87D	Beautiful Road dfs and similar, dp, dsu, graphs, implementation, sortings, trees	2300	x1055
87C	Interesting Game dp, games, math	2000	x1686
86C	Genetic engineering dp, string suffix structures, trees	2500	x863
83E	Two Subsequences bitmasks, dp	2800	x539
83D	Numbers dp, math, number theory	2400	x1033
82D	Two out of Three dp	2000	x2300
81E	Pairs dfs and similar, dp, dsu, graphs, implementation, trees	2700	x399
79D	Password bitmasks, dp, shortest paths	2800	x1341
79C	Beaver data structures, dp, greedy, hashing, strings, two pointers	1800	x2111
78C	Beaver Game dp, games, number theory	2000	x2174
77D	Domino Carpet dp, implementation	2300	x363
77C	Beavermuncher-0xFF dfs and similar, dp, dsu, greedy, trees	2100	x1172
76F	Tourist binary search, data structures, dp	2300	x771
76D	Plus and xor dp, greedy, math	1700	x2403
76C	Mutation bitmasks, dp, math	2700	x369

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