Problemset - Codeforces

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

#	Name
1100A	Roman and Browser implementation	1000	x10674
1099F	Cookies binary search, data structures, dfs and similar, dp, games, trees	2400	x1035
1099C	Postcard constructive algorithms, implementation	1200	x10420
1099B	Squares and Segments binary search, constructive algorithms, math	1100	x11476
1099A	Snowball implementation	800	x13348
1098F	Ж-function string suffix structures, strings	3500	x277
1098E	Fedya the Potter binary search, implementation, math, number theory	3400	x273
1098D	Eels data structures	2800	x882
1098C	Construct a tree binary search, constructive algorithms, dfs and similar, graphs, greedy, trees	2400	x1161
1098B	Nice table brute force, constructive algorithms, greedy, math	2100	x1797
1098A	Sum in the tree constructive algorithms, dfs and similar, greedy, trees	1600	x9547
1097H	Mateusz and an Infinite Sequence bitmasks, brute force, dp, strings	3400	x139
1097G	Vladislav and a Great Legend combinatorics, dp, trees	3000	x1054
1097F	Alex and a TV Show bitmasks, combinatorics, number theory	2500	x1472
1097E	Egor and an RPG game constructive algorithms, greedy	3400	x534
1097D	Makoto and a Blackboard dp, math, number theory, probabilities	2200	x3169
1097C	Yuhao and a Parenthesis greedy, implementation	1400	x8783
1097B	Petr and a Combination Lock bitmasks, brute force, dp	1200	x35928
1097A	Gennady and a Card Game brute force, implementation	800	x43794
1096G	Lucky Tickets divide and conquer, dp, fft	2400	x1965
1096F	Inversion Expectation dp, math, probabilities	2300	x2060
1096E	The Top Scorer combinatorics, dp, math, probabilities	2500	x1278
1096D	Easy Problem dp	1800	x9397
1096C	Polygon for the Angle brute force, geometry	1600	x7238
1096B	Substring Removal combinatorics, math, strings	1300	x11679
1096A	Find Divisible greedy, implementation, math	800	x19629
1095F	Make It Connected dsu, graphs, greedy	1900	x7544
1095E	Almost Regular Bracket Sequence implementation	1900	x4481
1095D	Circular Dance implementation	1600	x8092
1095C	Powers Of Two bitmasks, greedy	1400	x19581
1095B	Array Stabilization implementation	900	x24336
1095A	Repeating Cipher implementation	800	x36478
1093G	Multidimensional Queries bitmasks, data structures	2300	x2222
1093F	Vasya and Array dp	2400	x1359
1093E	Intersection of Permutations data structures	2400	x1858
1093D	Beautiful Graph dfs and similar, graphs	1700	x11322
1093C	Mishka and the Last Exam greedy	1300	x9718
1093B	Letters Rearranging constructive algorithms, greedy, sortings, strings	900	x17700
1093A	Dice Rolling math	800	x18356
1092F	Tree with Maximum Cost dfs and similar, dp, trees	1900	x10834
1092E	Minimal Diameter Forest constructive algorithms, dfs and similar, greedy, trees	2000	x1985
1092D2	Great Vova Wall (Version 2) data structures, implementation	2200	x3377
1092D1	Great Vova Wall (Version 1) greedy, implementation, math	2200	x5670
1092C	Prefixes and Suffixes strings	1700	x6346
1092B	Teams Forming sortings	800	x29203
1092A	Uniform String implementation	800	x17271
1091H	New Year and the Tricolore Recreation games	3200	x497
1091G	New Year and the Factorisation Collaboration interactive, math, number theory	3200	x227
1091F	New Year and the Mallard Expedition constructive algorithms, greedy	2600	x892
1091E	New Year and the Acquaintance Estimation binary search, data structures, graphs, greedy, implementation, math, sortings	2400	x1086
1091D	New Year and the Permutation Concatenation combinatorics, dp, math	1700	x7474
1091C	New Year and the Sphere Transmission math, number theory	1400	x10556
1091B	New Year and the Treasure Geolocation brute force, constructive algorithms, greedy, implementation	1200	x11011
1091A	New Year and the Christmas Ornament brute force, implementation, math	800	x18563
1090M	The Pleasant Walk implementation	1000	x7163
1090L	Berland University greedy, math	2000	x1420
1090K	Right Expansion Of The Mind math	2000	x1197
1090J	Two Prefixes strings	2600	x604
1090I	Minimal Product	2000	x1178
1090H	Linearization graphs	2900	x108
1090G	Combostone games, implementation	2500	x123
1090F	How to Learn You Score constructive algorithms, interactive	2600	x375
1090E	Horseback Riding flows, graphs	2300	x676
1090D	Similar Arrays constructive algorithms	1800	x2364
1090C	New Year Presents constructive algorithms, data structures	2400	x571
1090B	LaTeX Expert	1900	x1550
1090A	Company Merging greedy	1300	x4937
1089M	Minegraphed constructive algorithms, graphs	2400	x654
1089L	Lazyland	900	x4717
1089K	King Kog's Reception data structures	2400	x1244
1089J	JS Minification greedy, implementation	3200	x147
1089I	Interval-Free Permutations combinatorics	2600	x459
1089H	Harder Satisfiability 2-sat, dfs and similar, graphs	3400	x127
1089G	Guest Student math	1500	x3223
1089F	Fractions math	1900	x2150
1089E	Easy Chess constructive algorithms	1700	x2139
1089D	Distance Sum graphs	3100	x111
1089C	Cactus Search interactive	2500	x458
1089B	Bimatching graphs	3200	x249
1089A	Alice the Fan dp	2200	x1273
1088F	Ehab and a weird weight formula data structures, trees	2800	x597
1088E	Ehab and a component choosing problem dp, greedy, math, trees	2400	x1616
1088D	Ehab and another another xor problem bitmasks, constructive algorithms, implementation, interactive	2000	x3168
1088C	Ehab and a 2-operation task constructive algorithms, greedy, math	1400	x8517
1088B	Ehab and subtraction implementation, sortings	1000	x13584
1088A	Ehab and another construction problem brute force, constructive algorithms	800	x17635
1086F	Forest Fires math	3500	x316
1085G	Beautiful Matrix combinatorics, data structures, dp	2900	x709
1085F	Rock-Paper-Scissors Champion	2500	x710
1085E	Vasya and Templates greedy, implementation, strings	2300	x1122
1085D	Minimum Diameter Tree constructive algorithms, implementation, trees	1700	x5907
1085C	Connect Three implementation, math	1600	x5643
1085B	Div Times Mod math	1100	x10086
1085A	Right-Left Cipher implementation, strings	800	x12697
1084C	The Fair Nut and String combinatorics, dp, implementation	1500	x11647
1084B	Kvass and the Fair Nut greedy, implementation	1200	x8285
1084A	The Fair Nut and Elevator brute force, implementation	1000	x8229
1083F	The Fair Nut and Amusing Xor data structures	3300	x315
1083E	The Fair Nut and Rectangles data structures, dp, geometry	2400	x5611
1083D	The Fair Nut's getting crazy data structures, implementation	3500	x356

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