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
1237F	Balanced Domino Placements combinatorics, dp	2600	x1092
1237E	Balanced Binary Search Trees dp, math	2400	x1520
1237D	Balanced Playlist binary search, data structures, implementation	2000	x4778
1237C2	Balanced Removals (Harder) binary search, constructive algorithms, divide and conquer, greedy, implementation, sortings	1900	x4534
1237C1	Balanced Removals (Easier) constructive algorithms, geometry, greedy	1700	x6300
1237B	Balanced Tunnel data structures, sortings, two pointers	1300	x22738
1237A	Balanced Rating Changes implementation, math	1000	x22109
1236F	Alice and the Cactus dfs and similar, graphs, math, probabilities	3000	x213
1236E	Alice and the Unfair Game binary search, data structures, dp, dsu	2500	x731
1236D	Alice and the Doll brute force, data structures, greedy, implementation	2300	x1737
1236C	Labs constructive algorithms, greedy, implementation	1300	x10552
1236B	Alice and the List of Presents combinatorics, math	1500	x12051
1236A	Stones brute force, greedy, math	800	x17247
1234F	Yet Another Substring Reverse bitmasks, dp	2200	x2972
1234E	Special Permutations math	2000	x2976
1234D	Distinct Characters Queries data structures	1600	x18570
1234C	Pipes dp, implementation	1500	x13482
1234B2	Social Network (hard version) data structures, implementation	1300	x18441
1234B1	Social Network (easy version) implementation	1000	x19764
1234A	Equalize Prices Again math	800	x29546
1231E	Middle-Out constructive algorithms, greedy, strings	2200	x932
1231C	Increasing Matrix greedy	1100	x4361
1230B	Ania and Minimizing greedy, implementation	1000	x19630
1230A	Dawid and Bags of Candies brute force, implementation	800	x22919
1228F	One Node is Gone constructive algorithms, implementation, trees	2500	x479
1228E	Another Filling the Grid combinatorics, dp, math	2300	x3450
1228D	Complete Tripartite brute force, constructive algorithms, graphs, hashing, implementation	1900	x5418
1228C	Primes and Multiplication math, number theory	1700	x9634
1228B	Filling the Grid implementation, math	1400	x11888
1228A	Distinct Digits brute force, implementation	800	x23290
1227G	Not Same constructive algorithms	2600	x1188
1227F2	Wrong Answer on test 233 (Hard Version) combinatorics, math	2400	x1919
1227F1	Wrong Answer on test 233 (Easy Version) dp	2200	x2052
1227E	Arson In Berland Forest binary search, graphs, graphs, shortest paths	2200	x1640
1227D2	Optimal Subsequences (Hard Version) data structures, greedy	1800	x4725
1227D1	Optimal Subsequences (Easy Version) data structures, greedy	1600	x6828
1227C	Messy constructive algorithms	1700	x5789
1227B	Box constructive algorithms	1200	x10429
1227A	Math Problem math	1100	x10264
1225G	To Make 1 bitmasks, constructive algorithms, dp, greedy, number theory	3100	x659
1225F	Tree Factory constructive algorithms, greedy, trees	2500	x992
1225E	Rock Is Push binary search, dp	2200	x2085
1225D	Power Products hashing, math, number theory	1800	x10029
1225C	p-binary bitmasks, brute force, math	1600	x9786
1225B2	TV Subscriptions (Hard Version) implementation, two pointers	1300	x12194
1225B1	TV Subscriptions (Easy Version) implementation	1000	x12518
1225A	Forgetting Things math	900	x16619
1223G	Wooden Raft binary search, math, number theory	3200	x276
1223F	Stack Exterminable Arrays data structures, divide and conquer, dp, hashing	2600	x2268
1223E	Paint the Tree dp, sortings, trees	2100	x2891
1223D	Sequence Sorting dp, greedy, two pointers	2000	x4466
1223C	Save the Nature binary search, greedy	1600	x9759
1223B	Strings Equalization strings	1000	x15892
1223A	CME math	800	x22284
1221G	Graph And Numbers bitmasks, brute force, combinatorics, dp, meet-in-the-middle	2900	x876
1221F	Choose a Square binary search, data structures, sortings	2400	x1237
1221E	Game With String games	2500	x1169
1221D	Make The Fence Great Again dp	1800	x10195
1221C	Perfect Team binary search, math	1200	x24665
1221B	Knights constructive algorithms, greedy	1100	x12525
1221A	2048 Game brute force, greedy, math	1000	x18160
1220G	Geolocation geometry	3400	x74
1220F	Gardener Alex binary search, data structures	2700	x849
1220E	Tourism dfs and similar, dp, dsu, graphs, greedy, trees	2200	x3002
1220D	Alex and Julian bitmasks, math, number theory	1900	x4140
1220C	Substring Game in the Lesson games, greedy, strings	1300	x10811
1220B	Multiplication Table math, number theory	1300	x12135
1220A	Cards implementation, sortings, strings	800	x32789
1219G	Harvester implementation	2000	x821
1219C	Periodic integer number implementation, strings	1700	x2477
1218I	The Light Square 2-sat, dfs and similar, greedy	2100	x742
1218H	Function Composition dfs and similar	2900	x157
1218G	Alpha planetary system constructive algorithms, graphs, shortest paths	3000	x163
1218F	Workout plan data structures, greedy	1500	x3190
1218E	Product Tuples divide and conquer, fft	2500	x474
1218D	Xor Spanning Tree divide and conquer, fft, graphs	2400	x599
1218C	Jumping Transformers dp	2600	x217
1218B	Guarding warehouses data structures, geometry	3000	x95
1218A	BubbleReactor dp, graphs	2800	x180
1217F	Forced Online Queries Problem data structures, divide and conquer, dsu, graphs, trees	2600	x722
1217E	Sum Queries? data structures, greedy, implementation, math	2300	x2062
1217D	Coloring Edges constructive algorithms, dfs and similar, graphs	2100	x5939
1217C	The Number Of Good Substrings binary search, bitmasks, brute force	1700	x7855
1217B	Zmei Gorynich greedy, math	1600	x11853
1217A	Creating a Character binary search, math	1300	x15820
1216F	Wi-Fi data structures, dp, greedy	2100	x3100
1216E2	Numerical Sequence (hard version) binary search, math	2200	x1651
1216E1	Numerical Sequence (easy version) binary search, brute force, math	1900	x3730
1216D	Swords math	1300	x12213
1216C	White Sheet geometry, math	1700	x10353
1216B	Shooting greedy, implementation, sortings	900	x19677
1216A	Prefixes strings	800	x19545
1215F	Radio Stations 2-sat	2700	x1188
1215E	Marbles bitmasks, dp	2200	x3458
1215D	Ticket Game games, greedy, math	1700	x6561
1215C	Swap Letters constructive algorithms, greedy	1500	x11932
1215B	The Number of Products combinatorics, dp, implementation	1400	x18330
1215A	Yellow Cards greedy, implementation, math	1000	x12181
1214H	Tiles Placement constructive algorithms, dfs and similar, trees	2800	x458
1214G	Feeling Good bitmasks, data structures	3200	x330

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