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
725B	Food on the Plane implementation, math	1200	x5321
725A	Jumping Ball implementation	1000	x7483
724G	Xor-matic Number of the Graph bitmasks, graphs, math, number theory, trees	2600	x1515
724F	Uniformly Branched Trees combinatorics, dp, trees	2700	x522
724E	Goods transportation dp, flows, greedy	2900	x1661
724D	Dense Subsequence data structures, greedy, strings	1900	x2460
724C	Ray Tracing greedy, hashing, implementation, math, number theory, sortings	1800	x2281
724B	Batch Sort brute force, greedy, implementation, math	1500	x4243
724A	Checking the Calendar implementation	1000	x7555
723F	st-Spanning Tree dsu, graphs, greedy, implementation	2300	x1751
723E	One-Way Reform constructive algorithms, dfs and similar, flows, graphs, greedy	2200	x2259
723D	Lakes in Berland dfs and similar, dsu, graphs, greedy, implementation	1600	x7505
723C	Polycarp at the Radio greedy	1600	x5215
723B	Text Document Analysis expression parsing, implementation, strings	1100	x10856
723A	The New Year: Meeting Friends implementation, math, sortings	800	x100665
722F	Cyclic Cipher chinese remainder theorem, data structures, implementation, number theory, two pointers	2800	x607
722E	Research Rover combinatorics, dp	2900	x1083
722D	Generating Sets binary search, data structures, dfs and similar, greedy, strings, trees	1900	x3350
722C	Destroying Array data structures, dsu	1600	x11470
722B	Verse Pattern implementation, strings	1200	x6766
722A	Broken Clock brute force, implementation	1300	x6961
721E	Road to Home binary search, dp	2700	x356
721D	Maxim and Array constructive algorithms, data structures, greedy, math	2000	x2487
721C	Journey dp, graphs	1800	x6545
721B	Passwords implementation, math, sortings, strings	1100	x12465
721A	One-dimensional Japanese Crossword implementation	800	x19353
720F	Array Covering data structures	3100	x206
720E	Cipher implementation	3100	x72
720D	Slalom data structures, dp, sortings	3100	x331
720C	Homework constructive algorithms	3100	x157
720B	Cactusophobia dfs and similar, flows	2400	x465
720A	Closing ceremony greedy	2000	x958
719B	Anatoly and Cockroaches greedy	1400	x8816
719A	Vitya in the Countryside implementation	1100	x16390
718E	Matvey's Birthday bitmasks, graphs	3300	x430
718D	Andrew and Chemistry dp, hashing, trees	2900	x494
718C	Sasha and Array data structures, math, matrices	2300	x4618
718A	Efim and Strange Grade dp, implementation, math	1700	x4628
717I	Cowboy Beblop at his computer geometry	2800	x214
717H	Pokermon League challenge math, probabilities	2400	x471
717G	Underfail flows	2400	x732
717F	Heroes of Making Magic III data structures	2600	x382
717E	Paint it really, really dark gray dfs and similar	1900	x1584
717D	Dexterina’s Lab games, matrices, probabilities	1900	x1584
717C	Potions Homework implementation, sortings	1200	x4285
717B	R3D3’s Summer Adventure dp, greedy	2700	x181
717A	Festival Organization combinatorics, math, number theory	2900	x433
716B	Complete the Word greedy, two pointers	1300	x13002
716A	Crazy Computer implementation	800	x24041
715E	Complete the Permutations combinatorics, fft, graphs, math	3400	x454
715D	Create a Maze constructive algorithms	3100	x388
715C	Digit Tree dfs and similar, divide and conquer, dsu, trees	2700	x2583
715B	Complete The Graph binary search, constructive algorithms, graphs, shortest paths	2300	x3402
715A	Plus and Square Root constructive algorithms, math	1600	x5866
714B	Filya and Homework implementation, sortings	1200	x15521
714A	Meeting of Old Friends implementation, math	1100	x11144
713E	Sonya Partymaker binary search, dp	3300	x405
713D	Animals and Puzzle binary search, data structures	2700	x1359
713C	Sonya and Problem Wihtout a Legend dp, sortings	2300	x6532
713B	Searching Rectangles binary search, constructive algorithms, interactive	2200	x1506
713A	Sonya and Queries data structures, implementation	1400	x8865
712E	Memory and Casinos data structures, math, probabilities	2500	x697
712D	Memory and Scores combinatorics, dp, math	2200	x1993
712C	Memory and De-Evolution greedy, math	1600	x6198
712B	Memory and Trident implementation, strings	1100	x10313
712A	Memory and Crow implementation, math	800	x12587
711E	ZS and The Birthday Paradox math, number theory, probabilities	2300	x1367
711D	Directed Roads combinatorics, dfs and similar, graphs, math	1900	x4970
711C	Coloring Trees dp	1700	x9341
711B	Chris and Magic Square constructive algorithms, implementation	1400	x8639
711A	Bus to Udayland brute force, implementation	800	x30978
710F	String Set Queries brute force, data structures, hashing, interactive, string suffix structures, strings	2400	x2500
710E	Generate a String dfs and similar, dp	2000	x5772
710D	Two Arithmetic Progressions math, number theory	2500	x1844
710C	Magic Odd Square constructive algorithms, math	1500	x5552
710B	Optimal Point on a Line brute force, sortings	1400	x10593
710A	King Moves implementation	800	x14784
709B	Checkpoints greedy, implementation, sortings	1500	x5027
709A	Juicer implementation	900	x37950
708E	Student's Camp dp, math	3100	x1344
708D	Incorrect Flow flows	2900	x887
708C	Centroids data structures, dfs and similar, dp, graphs, greedy, trees	2300	x4360
708B	Recover the String constructive algorithms, greedy, implementation, math	1900	x3440
708A	Letters Cyclic Shift constructive algorithms, greedy, implementation, strings	1200	x9800
707E	Garlands data structures	2400	x1342
707D	Persistent Bookcase bitmasks, data structures, dfs and similar, implementation	2200	x2990
707C	Pythagorean Triples math, number theory	1500	x13479
707B	Bakery graphs	1300	x13601
707A	Brain's Photos implementation	800	x55770
706E	Working routine data structures, implementation	2500	x1262
706D	Vasiliy's Multiset binary search, bitmasks, data structures, trees	1800	x12576
706C	Hard problem dp, strings	1600	x19354
706B	Interesting drink binary search, dp, implementation	1100	x84318
706A	Beru-taxi brute force, geometry, implementation	900	x15340
705B	Spider Man games, math	1100	x9561
705A	Hulk implementation	800	x131997
704E	Iron Man data structures, geometry, trees	3300	x348
704D	Captain America flows, greedy	3100	x1010
704C	Black Widow dp, graphs, implementation, math	2900	x525
704B	Ant Man dp, graphs, greedy	2500	x2168

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