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
38B	Chess brute force, implementation, math	1200	x4026
38A	Army implementation	800	x26441
37E	Trial for Chief graphs, greedy, shortest paths	2600	x678
37D	Lesson Timetable combinatorics, dp, math	2300	x553
37C	Old Berland Language data structures, greedy, trees	1900	x2143
37B	Computer Game greedy, implementation	1800	x1093
37A	Towers sortings	1000	x27660
36E	Two Paths constructive algorithms, dsu, graphs, implementation	2600	x614
36D	New Game with a Chess Piece games	2300	x769
36C	Bowls geometry, implementation	2200	x380
36B	Fractal implementation	1600	x2034
36A	Extra-terrestrial Intelligence implementation	1300	x3544
35E	Parade data structures, sortings	2100	x879
35D	Animals dp, greedy	1700	x3857
35C	Fire Again brute force, dfs and similar, shortest paths	1500	x8606
35B	Warehouse implementation	1700	x1194
35A	Shell Game implementation	1000	x7576
34E	Collisions brute force, implementation, math	2000	x652
34D	Road Map dfs and similar, graphs	1600	x6484
34C	Page Numbers expression parsing, implementation, sortings, strings	1300	x4765
34B	Sale greedy, sortings	900	x65956
34A	Reconnaissance 2 implementation	800	x34652
33E	Helper	2600	x152
33D	Knights geometry, graphs, shortest paths, sortings	2000	x1558
33C	Wonderful Randomized Sum greedy	1800	x3577
33B	String Problem shortest paths	1800	x5720
33A	What is for dinner? greedy, implementation	1200	x4848
32E	Hide-and-Seek geometry, implementation	2400	x423
32D	Constellation implementation	1600	x1491
32C	Flea math	1700	x2560
32B	Borze expression parsing, implementation	800	x79666
32A	Reconnaissance brute force	800	x14884
31E	TV Game dp	2400	x1296
31D	Chocolate dfs and similar, implementation	2000	x1228
31C	Schedule implementation	1700	x2026
31B	Sysadmin Bob greedy, implementation, strings	1500	x4741
31A	Worms Evolution implementation	1200	x12643
30E	Tricky and Clever Password binary search, constructive algorithms, data structures, greedy, hashing, strings	2800	x920
30D	King's Problem? geometry, greedy	2600	x498
30C	Shooting Gallery dp, probabilities	1800	x2391
30B	Codeforces World Finals implementation	1700	x1386
30A	Accounting brute force, math	1400	x3984
29E	Quarrel graphs, shortest paths	2400	x1132
29D	Ant on the Tree constructive algorithms, dfs and similar, trees	2000	x2938
29C	Mail Stamps data structures, dfs and similar, graphs, implementation	1700	x6470
29B	Traffic Lights implementation	1500	x3349
29A	Spit Problem brute force	1000	x8271
28E	DravDe saves the world geometry, math	2800	x109
28D	Don't fear, DravDe is kind binary search, data structures, dp, hashing	2400	x676
28C	Bath Queue combinatorics, dp, probabilities	2200	x1283
28B	pSort dfs and similar, dsu, graphs	1600	x5514
28A	Bender Problem implementation	1600	x969
27E	Number With The Given Amount Of Divisors brute force, dp, number theory	2000	x4905
27D	Ring Road 2 2-sat, dfs and similar, dsu, graphs	2200	x3090
27C	Unordered Subsequence constructive algorithms, greedy	1900	x3063
27B	Tournament bitmasks, brute force, dfs and similar, greedy	1300	x5882
27A	Next Test implementation, sortings	1200	x22991
26E	Multithreading constructive algorithms	2400	x413
26D	Tickets combinatorics, math, probabilities	2400	x930
26C	Parquet combinatorics, constructive algorithms, greedy, implementation	2000	x1012
26B	Regular Bracket Sequence greedy	1400	x25815
26A	Almost Prime number theory	900	x42655
25E	Test hashing, strings	2200	x3155
25D	Roads not only in Berland dsu, graphs, trees	1900	x15561
25C	Roads in Berland graphs, shortest paths	1900	x8007
25B	Phone numbers implementation	1100	x11248
25A	IQ test brute force	1300	x103776
24E	Berland collider binary search	2300	x1023
24D	Broken robot dp, math, probabilities	2400	x2641
24C	Sequence of points geometry, implementation, math	1800	x1443
24B	F1 Champions implementation	1500	x2032
24A	Ring road graphs	1400	x6844
23E	Tree dp	2500	x725
23D	Tetragon geometry, math	2600	x380
23C	Oranges and Apples constructive algorithms, sortings	2500	x1690
23B	Party constructive algorithms, graphs, math	1600	x3858
23A	You're Given a String... brute force, greedy	1200	x6302
22E	Scheme dfs and similar, graphs, trees	2300	x2076
22D	Segments greedy, sortings	1900	x3409
22C	System Administrator graphs	1700	x3803
22B	Bargaining Table brute force, dp	1500	x4781
22A	Second Order Statistics brute force	800	x27060
21D	Traveling Graph bitmasks, graph matchings, graphs	2400	x1293
21C	Stripe 2 binary search, dp, sortings	2000	x2537
21B	Intersection implementation, math	2000	x1583
21A	Jabber ID implementation, strings	1900	x2270
20C	Dijkstra? graphs, shortest paths	1900	x46759
20B	Equation math	2000	x4795
20A	BerOS file system implementation	1700	x7120
19E	Fairy dfs and similar, divide and conquer, dsu	2900	x2512
19D	Points data structures	2800	x3167
19C	Deletion of Repeats greedy, hashing, string suffix structures	2200	x1321
19B	Checkout Assistant dp	1900	x5821
19A	World Football Cup implementation	1400	x3141
18E	Flag 2 dp	2000	x1269
18D	Seller Bob brute force, dp, greedy	2000	x1290
18C	Stripe data structures, implementation	1200	x15411
18B	Platforms brute force, math	1700	x2428
18A	Triangle brute force, geometry	1500	x6945
17E	Palisection strings	2900	x1990

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