Problemset - Codeforces

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Before contest
Codeforces Round (Div. 1)
3 days

Before contest
Codeforces Round (Div. 2)
3 days

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Problems

#	Name
34E	Collisions brute force, implementation, math	2000	x604
34D	Road Map dfs and similar, graphs	1600	x5390
34C	Page Numbers expression parsing, implementation, sortings, strings	1300	x4356
34B	Sale greedy, sortings	900	x55985
34A	Reconnaissance 2 implementation	800	x31298
33E	Helper	2600	x135
33D	Knights geometry, graphs, shortest paths, sortings	2000	x1257
33C	Wonderful Randomized Sum greedy	1800	x3107
33B	String Problem shortest paths	1800	x4830
33A	What is for dinner? greedy, implementation	1200	x4261
32E	Hide-and-Seek geometry, implementation	2400	x351
32D	Constellation implementation	1600	x1319
32C	Flea math	1700	x2227
32B	Borze expression parsing, implementation	800	x68269
32A	Reconnaissance brute force	800	x13140
31E	TV Game dp	2400	x1146
31D	Chocolate dfs and similar, implementation	2000	x1059
31C	Schedule implementation	1700	x1851
31B	Sysadmin Bob greedy, implementation, strings	1500	x4406
31A	Worms Evolution implementation	1200	x10616
30E	Tricky and Clever Password binary search, constructive algorithms, data structures, greedy, hashing, strings	2800	x762
30D	King's Problem? geometry, greedy	2600	x464
30C	Shooting Gallery dp, probabilities	1800	x2028
30B	Codeforces World Finals implementation	1700	x1221
30A	Accounting brute force, math	1400	x3575
29E	Quarrel graphs, shortest paths	2400	x962
29D	Ant on the Tree constructive algorithms, dfs and similar, trees	2000	x2537
29C	Mail Stamps data structures, dfs and similar, graphs, implementation	1700	x5271
29B	Traffic Lights implementation	1500	x3044
29A	Spit Problem brute force	1000	x7355
28E	DravDe saves the world geometry, math	2800	x97
28D	Don't fear, DravDe is kind binary search, data structures, dp, hashing	2400	x625
28C	Bath Queue combinatorics, dp, probabilities	2200	x1082
28B	pSort dfs and similar, dsu, graphs	1600	x4834
28A	Bender Problem implementation	1600	x819
27E	Number With The Given Amount Of Divisors brute force, dp, number theory	2000	x4382
27D	Ring Road 2 2-sat, dfs and similar, dsu, graphs	2200	x2681
27C	Unordered Subsequence constructive algorithms, greedy	1900	x2848
27B	Tournament bitmasks, brute force, dfs and similar, greedy	1300	x5475
27A	Next Test implementation, sortings	1200	x21029
26E	Multithreading constructive algorithms	2400	x384
26D	Tickets combinatorics, math, probabilities	2400	x817
26C	Parquet combinatorics, constructive algorithms, greedy, implementation	2000	x885
26B	Regular Bracket Sequence greedy	1400	x21032
26A	Almost Prime number theory	900	x33893
25E	Test hashing, strings	2200	x2625
25D	Roads not only in Berland dsu, graphs, trees	1900	x12303
25C	Roads in Berland graphs, shortest paths	1900	x6702
25B	Phone numbers implementation	1100	x10030
25A	IQ test brute force	1300	x91096
24E	Berland collider binary search	2300	x927
24D	Broken robot dp, math, probabilities	2400	x2158
24C	Sequence of points geometry, implementation, math	1800	x1277
24B	F1 Champions implementation	1500	x1833
24A	Ring road graphs	1400	x5507
23E	Tree dp	2500	x648
23D	Tetragon geometry, math	2600	x343
23C	Oranges and Apples constructive algorithms, sortings	2500	x1502
23B	Party constructive algorithms, graphs, math	1600	x3465
23A	You're Given a String... brute force, greedy	1200	x5572
22E	Scheme dfs and similar, graphs, trees	2300	x1762
22D	Segments greedy, sortings	1900	x2835
22C	System Administrator graphs	1700	x3268
22B	Bargaining Table brute force, dp	1500	x4332
22A	Second Order Statistics brute force	800	x23519
21D	Traveling Graph bitmasks, graph matchings, graphs	2400	x956
21C	Stripe 2 binary search, dp, sortings	2000	x2210
21B	Intersection implementation, math	2000	x1395
21A	Jabber ID implementation, strings	1900	x1915
20C	Dijkstra? graphs, shortest paths	1900	x35303
20B	Equation math	2000	x4095
20A	BerOS file system implementation	1700	x6411
19E	Fairy dfs and similar, divide and conquer, dsu	2900	x2060
19D	Points data structures	2800	x2601
19C	Deletion of Repeats greedy, hashing, string suffix structures	2200	x1131
19B	Checkout Assistant dp	1900	x5065
19A	World Football Cup implementation	1400	x2835
18E	Flag 2 dp	2000	x1134
18D	Seller Bob brute force, dp, greedy	2000	x1098
18C	Stripe data structures, implementation	1200	x13711
18B	Platforms brute force, math	1700	x2189
18A	Triangle brute force, geometry	1500	x6280
17E	Palisection strings	2900	x1668
17D	Notepad number theory	2400	x1127
17C	Balance dp	2500	x954
17B	Hierarchy dfs and similar, dsu, greedy, shortest paths	1500	x5142
17A	Noldbach problem brute force, math, number theory	1000	x17642
16E	Fish bitmasks, dp, probabilities	1900	x5448
16D	Logging implementation, strings	1900	x1655
16C	Monitor binary search, number theory	1800	x4909
16B	Burglar and Matches greedy, implementation, sortings	900	x18719
16A	Flag implementation	800	x15075
15E	Triangles combinatorics, dp	2600	x603
15D	Map data structures, implementation, sortings	2500	x794
15C	Industrial Nim games	2000	x2409
15B	Laser math	1800	x1491
15A	Cottage Village implementation, sortings	1200	x4002
14E	Camels dp	1900	x1756
14D	Two Paths dfs and similar, dp, graphs, shortest paths, trees, two pointers	1900	x4718
14C	Four Segments brute force, constructive algorithms, geometry, implementation, math	1700	x3466