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
119E	Alternative Reality geometry	2400	x123
119D	String Transformation hashing, strings	2500	x623
119C	Education Reform dp	2000	x1044
119B	Before Exam constructive algorithms, implementation, sortings	1900	x1137
119A	Epic Game implementation	800	x29575
118E	Bertown roads dfs and similar, graphs	2000	x8425
118D	Caesar's Legions dp	1700	x20454
118C	Fancy Number brute force, greedy, sortings, strings	1900	x2871
118B	Present from Lena constructive algorithms, implementation	1000	x34556
118A	String Task implementation, strings	1000	x231227
117E	Tree or not Tree data structures, divide and conquer, graphs, implementation, trees	2900	x414
117D	Not Quick Transformation divide and conquer, math	2500	x369
117C	Cycle dfs and similar, graphs	2000	x2962
117B	Very Interesting Game brute force, number theory	1800	x1743
117A	Elevator implementation, math	1300	x2225
116B	Little Pigs and Wolves greedy, implementation	1100	x14613
116A	Tram implementation	800	x176367
115E	Linear Kingdom Races data structures, dp	2400	x2197
115D	Unambiguous Arithmetic Expression dp, expression parsing	2600	x454
115C	Plumber math	2200	x676
115B	Lawnmower greedy, sortings	1500	x2840
115A	Party dfs and similar, graphs, trees	900	x43279
114B	PFAST Inc. bitmasks, brute force, graphs	1500	x4261
114A	Cifera math	1000	x15074
113E	Sleeping combinatorics, implementation, math	2700	x142
113D	Museum math, matrices, probabilities	2700	x816
113C	Double Happiness brute force, math, number theory	2200	x1450
113B	Petr# brute force, data structures, hashing, strings	2000	x3240
113A	Grammar Lessons implementation, strings	1600	x2603
112B	Petya and Square implementation, math	1200	x4539
112A	Petya and Strings implementation, strings	800	x286824
111E	Petya and Rectangle	2900	x74
111D	Petya and Coloring combinatorics, dp	2300	x901
111C	Petya and Spiders bitmasks, dp, dsu	2100	x1582
111B	Petya and Divisors binary search, data structures, number theory	1900	x4104
111A	Petya and Inequiations greedy	1400	x5168
110B	Lucky String constructive algorithms, strings	1100	x11018
110A	Nearly Lucky Number implementation	800	x199272
109E	Lucky Interval brute force, math	2700	x113
109D	Lucky Sorting constructive algorithms, sortings	2000	x894
109C	Lucky Tree dp, dsu, trees	1900	x4116
109B	Lucky Probability brute force, probabilities	1900	x1780
109A	Lucky Sum of Digits brute force, implementation	1000	x19815
108B	Datatypes math, sortings	1400	x2735
108A	Palindromic Times implementation, strings	1000	x10344
107E	Darts geometry, probabilities	2700	x151
107D	Crime Management dp, graphs, matrices	2400	x487
107C	Arrangement bitmasks, dp	2400	x460
107B	Basketball Team combinatorics, dp, math, probabilities	1600	x4271
107A	Dorm Water Supply dfs and similar, graphs	1400	x5904
106E	Space Rescuers geometry, ternary search	2100	x997
106D	Treasure Island brute force, implementation	1700	x1471
106C	Buns dp	1700	x7056
106B	Choosing Laptop brute force, implementation	1000	x6865
106A	Card Game implementation	1000	x8534
105E	Lift and Throw brute force	2500	x211
105D	Entertaining Geodetics brute force, dsu, implementation	2700	x145
105C	Item World brute force, implementation, sortings	2200	x390
105B	Dark Assembly brute force, probabilities	1800	x906
105A	Transmigration implementation	1700	x2022
104A	Blackjack implementation	800	x17147
103E	Buying Sets flows, graph matchings	2900	x1067
103D	Time to Raid Cowavans brute force, data structures, sortings	2100	x2526
103C	Russian Roulette constructive algorithms, greedy	1900	x1049
103B	Cthulhu dfs and similar, dsu, graphs	1500	x10622
103A	Testing Pants for Sadness greedy, implementation, math	1100	x6569
102B	Sum of Digits implementation	1000	x31913
102A	Clothes brute force	1200	x3420
101E	Candies and Stones divide and conquer, dp	2500	x604
101D	Castle dp, greedy, probabilities, sortings, trees	2300	x790
101C	Vectors implementation, math	2000	x821
101B	Buses binary search, data structures, dp	1700	x3193
101A	Homework greedy	1200	x4368
100J	Interval Coloring *special problem, greedy, math	2400	x76
100I	Rotation *special problem, geometry, math	1500	x430
100H	Battleship *special problem, dfs and similar, implementation	2100	x93
100G	Name the album *special problem, data structures, implementation	1800	x143
100F	Polynom *special problem, implementation	1800	x159
100E	Lamps in a Line *special problem, math	1600	x305
100D	World of Mouth *special problem, strings	1500	x365
100C	A+B *special problem, implementation	1400	x625
100B	Friendly Numbers *special problem, implementation	1500	x581
100A	Carpeting the Room *special problem, implementation	1100	x1024
99B	Help Chef Gerasim implementation, sortings	1300	x3212
99A	Help Far Away Kingdom strings	800	x7718
98E	Help Shrek and Donkey dp, games, math, probabilities	2700	x558
98D	Help Monks constructive algorithms	2500	x200
98C	Help Greg the Dwarf geometry, ternary search	2500	x347
98B	Help King implementation, probabilities, trees	2200	x152
98A	Help Victoria the Wise brute force, implementation	1700	x1342
97E	Leaders dfs and similar, dsu, graphs, trees	2200	x429
97D	Robot in Basement bitmasks, brute force, implementation	2700	x290
97C	Winning Strategy binary search, graphs, math, shortest paths	2400	x354
97B	Superset constructive algorithms, divide and conquer	2300	x1000
97A	Domino brute force, implementation	2400	x335
96B	Lucky Numbers (easy) binary search, bitmasks, brute force	1300	x19065
96A	Football implementation, strings	900	x193499
95E	Lucky Country dp, dsu, graphs	2500	x1902
95D	Horse Races dp, math	2500	x502
95C	Volleyball shortest paths	1900	x3386

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