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
1198D	Rectangle Painting 1 dp	2300	x3743
1198C	Matching vs Independent Set constructive algorithms, graphs, greedy, sortings	2000	x4054
1198B	Welfare State binary search, brute force, data structures, sortings	1600	x9987
1198A	MP3 sortings, two pointers	1600	x10130
1197F	Coloring Game dp, games, matrices	2700	x342
1197E	Culture Code binary search, combinatorics, data structures, dp, shortest paths, sortings	2300	x1851
1197D	Yet Another Subarray Problem dp, greedy, math	1900	x5778
1197C	Array Splitting greedy, sortings	1400	x15242
1197B	Pillars greedy, implementation	1000	x14507
1197A	DIY Wooden Ladder greedy, math, sortings	900	x14034
1196F	K-th Path brute force, constructive algorithms, shortest paths, sortings	2200	x3151
1196E	Connected Component on a Chessboard constructive algorithms, implementation	1800	x3915
1196D2	RGB Substring (hard version) data structures, dp, implementation, two pointers	1600	x10434
1196D1	RGB Substring (easy version) implementation	1500	x11131
1196C	Robot Breakout implementation	1500	x9772
1196B	Odd Sum Segments constructive algorithms, math	1200	x17538
1196A	Three Piles of Candies brute force, constructive algorithms, math	800	x29124
1195F	Geometers Anonymous Club data structures, geometry, math, sortings	2500	x1037
1195E	OpenStreetMap data structures, two pointers	2100	x3549
1195D2	Submarine in the Rybinsk Sea (hard edition) combinatorics, math, number theory	1800	x4898
1195D1	Submarine in the Rybinsk Sea (easy edition) combinatorics, math, number theory	1500	x8197
1195C	Basketball Exercise dp	1400	x34787
1195B	Sport Mafia binary search, brute force, math	1000	x21956
1195A	Drinks Choosing greedy, math	1000	x14197
1194G	Another Meme Problem dp	2700	x331
1194F	Crossword Expert combinatorics, dp, number theory, probabilities, two pointers	2400	x1219
1194E	Count The Rectangles bitmasks, brute force, data structures, geometry, sortings	2200	x2057
1194D	1-2-K Game games, math	1700	x7176
1194C	From S To T implementation, strings	1300	x14597
1194B	Yet Another Crosses Problem implementation	1300	x10711
1194A	Remove a Progression math	800	x17372
1193C	Scissors and Tape *special problem, constructive algorithms, geometry		x48
1193B	Magic Tree *special problem, data structures, dp, trees		x508
1193A	Amusement Park *special problem, dp, math		x465
1192C	Cubeword *special problem, brute force, dp, meet-in-the-middle		x367
1192B	Dynamic Diameter *special problem, data structures, dfs and similar, divide and conquer, trees		x1550
1192A	Building Skyscrapers *special problem		x80
1191B	Tokitsukaze and Mahjong brute force, implementation	1200	x9864
1191A	Tokitsukaze and Enhancement brute force	800	x18980
1190F	Tokitsukaze and Powers number theory, probabilities	3400	x108
1190E	Tokitsukaze and Explosion binary search, greedy	3100	x262
1190D	Tokitsukaze and Strange Rectangle data structures, divide and conquer, sortings, two pointers	2000	x2684
1190C	Tokitsukaze and Duel brute force, games, greedy	2300	x2225
1190B	Tokitsukaze, CSL and Stone Game games	1800	x6830
1190A	Tokitsukaze and Discard Items implementation, two pointers	1400	x9806
1189C	Candies! data structures, dp, implementation, math	1400	x11067
1189B	Number Circle greedy, math, sortings	1100	x15306
1189A	Keanu Reeves strings	800	x16105
1188E	Problem from Red Panda combinatorics	3300	x288
1188D	Make Equal dp	3100	x909
1188C	Array Beauty dp	2500	x2133
1188B	Count Pairs math, matrices, number theory, two pointers	2300	x5165
1188A2	Add on a Tree: Revolution constructive algorithms, dfs and similar, implementation, trees	2500	x1296
1188A1	Add on a Tree trees	1600	x8933
1187G	Gang Up flows, graphs	2500	x688
1187F	Expected Square Beauty dp, math, probabilities	2500	x1111
1187E	Tree Painting dfs and similar, dp, trees	2100	x11268
1187D	Subarray Sorting data structures, sortings	2400	x3000
1187C	Vasya And Array constructive algorithms, greedy, implementation	1800	x6764
1187B	Letters Shop binary search, implementation, strings	1300	x12894
1187A	Stickers and Toys math	900	x15539
1186F	Vus the Cossack and a Graph dfs and similar, graphs, greedy, implementation	2400	x996
1186E	Vus the Cossack and a Field divide and conquer, implementation, math	2500	x680
1186D	Vus the Cossack and Numbers constructive algorithms, greedy, math	1500	x9320
1186C	Vus the Cossack and Strings implementation, math	1800	x6545
1186A	Vus the Cossack and a Contest implementation	800	x42437
1185G2	Playlist for Polycarp (hard version) combinatorics, dp	2600	x919
1185G1	Playlist for Polycarp (easy version) bitmasks, combinatorics, dp	2100	x3197
1185F	Two Pizzas bitmasks, brute force	2100	x2237
1185E	Polycarp and Snakes brute force, implementation	2000	x2807
1185D	Extra Element implementation, math	1700	x7058
1185C2	Exam in BerSU (hard version) brute force, data structures, greedy, math	1700	x7817
1185C1	Exam in BerSU (easy version) greedy, sortings	1200	x11897
1185B	Email from Polycarp implementation, strings	1200	x14217
1185A	Ropewalkers math	800	x15381
1184E3	Daleks' Invasion (hard) data structures, dsu, graphs, trees	2400	x666
1184E2	Daleks' Invasion (medium) dfs and similar, graphs, shortest paths, trees	2100	x1057
1184E1	Daleks' Invasion (easy) graphs, trees	1900	x1862
1184D2	Parallel Universes (Hard) math, matrices	3100	x128
1184D1	Parallel Universes (Easy) implementation	1600	x2789
1184C3	Heidi and the Turing Test (Hard)	3200	x45
1184C2	Heidi and the Turing Test (Medium) data structures	2200	x767
1184C1	Heidi and the Turing Test (Easy) implementation	1600	x2938
1184B3	The Doctor Meets Vader (Hard) flows, shortest paths	2700	x246
1184B2	The Doctor Meets Vader (Medium) flows, graph matchings, graphs, shortest paths, sortings	2200	x688
1184B1	The Doctor Meets Vader (Easy) binary search, sortings	1400	x6221
1184A3	Heidi Learns Hashing (Hard) fft, math, number theory	3100	x155
1184A2	Heidi Learns Hashing (Medium) brute force, number theory	2100	x1123
1184A1	Heidi Learns Hashing (Easy) brute force, math, number theory	1200	x6584
1183H	Subsequences (hard version) dp, strings	1900	x3641
1183G	Candy Box (hard version) greedy, implementation, sortings	2000	x2665
1183F	Topforces Strikes Back brute force, math, sortings	2100	x2252
1183E	Subsequences (easy version) dp, graphs, implementation, shortest paths	2000	x5421
1183D	Candy Box (easy version) greedy, sortings	1400	x20397
1183C	Computer Game binary search, math	1400	x15039
1183B	Equalize Prices math	900	x19694
1183A	Nearest Interesting Number implementation	800	x27019
1182F	Maximum Sine binary search, data structures, number theory	2700	x399
1182E	Product Oriented Recurrence dp, math, matrices, number theory	2300	x3327
1182D	Complete Mirror constructive algorithms, dfs and similar, dp, hashing, implementation, trees	2400	x1002

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