Problemset - Codeforces

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Problems

#	Name
30E	Tricky and Clever Password binary search, constructive algorithms, data structures, greedy, hashing, strings	2800	x674
30D	King's Problem? geometry, greedy	2600	x410
30C	Shooting Gallery dp, probabilities	1800	x1853
30B	Codeforces World Finals implementation	1700	x1150
30A	Accounting brute force, math	1400	x3321
29E	Quarrel graphs, shortest paths	2400	x864
29D	Ant on the Tree constructive algorithms, dfs and similar, trees	2000	x2322
29C	Mail Stamps data structures, dfs and similar, graphs, implementation	1700	x4574
29B	Traffic Lights implementation	1500	x2839
29A	Spit Problem brute force	1000	x6847
28E	DravDe saves the world geometry, math	2800	x85
28D	Don't fear, DravDe is kind binary search, data structures, dp, hashing	2400	x589
28C	Bath Queue combinatorics, dp, probabilities	2200	x985
28B	pSort dfs and similar, dsu, graphs	1600	x4424
28A	Bender Problem implementation	1600	x769
27E	Number With The Given Amount Of Divisors brute force, dp, number theory	2000	x4004
27D	Ring Road 2 2-sat, dfs and similar, dsu, graphs	2200	x2370
27C	Unordered Subsequence constructive algorithms, greedy	1900	x2696
27B	Tournament bitmasks, brute force, dfs and similar, greedy	1300	x5158
27A	Next Test implementation, sortings	1200	x19394
26E	Multithreading constructive algorithms	2400	x362
26D	Tickets combinatorics, math, probabilities	2400	x758
26C	Parquet combinatorics, constructive algorithms, greedy, implementation	2000	x824
26B	Regular Bracket Sequence greedy	1400	x17592
26A	Almost Prime number theory	900	x28770
25E	Test hashing, strings	2200	x2204
25D	Roads not only in Berland dsu, graphs, trees	1900	x10418
25C	Roads in Berland graphs, shortest paths	1900	x5895
25B	Phone numbers implementation	1100	x9342
25A	IQ test brute force	1300	x81549
24E	Berland collider binary search	2300	x859
24D	Broken robot dp, math, probabilities	2400	x1804
24C	Sequence of points geometry, implementation, math	1800	x1216
24B	F1 Champions implementation	1500	x1715
24A	Ring road graphs	1400	x4788
23E	Tree dp	2500	x589
23D	Tetragon geometry, math	2600	x325
23C	Oranges and Apples constructive algorithms, sortings	2500	x1357
23B	Party constructive algorithms, graphs, math	1600	x3202
23A	You're Given a String... brute force, greedy	1200	x5088
22E	Scheme dfs and similar, graphs, trees	2300	x1550
22D	Segments greedy, sortings	1900	x2625
22C	System Administrator graphs	1700	x2957
22B	Bargaining Table brute force, dp	1500	x4083
22A	Second Order Statistics brute force	800	x20973
21D	Traveling Graph bitmasks, graph matchings, graphs	2400	x796
21C	Stripe 2 binary search, dp, sortings	2000	x2023
21B	Intersection implementation, math	2000	x1303
21A	Jabber ID implementation, strings	1900	x1784
20C	Dijkstra? graphs, shortest paths	1900	x30078
20B	Equation math	2000	x3665
20A	BerOS file system implementation	1700	x5957
19E	Fairy dfs and similar, divide and conquer, dsu	2900	x1620
19D	Points data structures	2800	x2127
19C	Deletion of Repeats greedy, hashing, string suffix structures	2200	x1048
19B	Checkout Assistant dp	1900	x4445
19A	World Football Cup implementation	1400	x2629
18E	Flag 2 dp	2000	x1022
18D	Seller Bob brute force, dp, greedy	2000	x1032
18C	Stripe data structures, implementation	1200	x12512
18B	Platforms brute force, math	1700	x2065
18A	Triangle brute force, geometry	1500	x5706
17E	Palisection strings	2900	x1514
17D	Notepad number theory	2400	x1038
17C	Balance dp	2500	x818
17B	Hierarchy dfs and similar, dsu, greedy, shortest paths	1500	x4488
17A	Noldbach problem brute force, math, number theory	1000	x15159
16E	Fish bitmasks, dp, probabilities	1900	x4672
16D	Logging implementation, strings	1900	x1514
16C	Monitor binary search, number theory	1800	x4522
16B	Burglar and Matches greedy, implementation, sortings	900	x16954
16A	Flag implementation	800	x13618
15E	Triangles combinatorics, dp	2600	x557
15D	Map data structures, implementation, sortings	2500	x717
15C	Industrial Nim games	2000	x2165
15B	Laser math	1800	x1299
15A	Cottage Village implementation, sortings	1200	x3617
14E	Camels dp	1900	x1620
14D	Two Paths dfs and similar, dp, graphs, shortest paths, trees, two pointers	1900	x4320
14C	Four Segments brute force, constructive algorithms, geometry, implementation, math	1700	x3097
14B	Young Photographer implementation	1000	x6679
14A	Letter implementation	800	x10078
13E	Holes data structures, dsu	2700	x5397
13D	Triangles dp, geometry	2600	x595
13C	Sequence dp, sortings	2200	x4140
13B	Letter A geometry, implementation	2000	x834
13A	Numbers implementation, math	1000	x7380
12E	Start of the session constructive algorithms	2100	x1163
12D	Ball data structures, sortings	2400	x2008
12C	Fruits greedy, implementation, sortings	1100	x5790
12B	Correct Solution? implementation, sortings	1100	x8087
12A	Super Agent implementation	800	x12414
11E	Forward, march! binary search, dp, greedy	2800	x346
11D	A Simple Task bitmasks, dp, graphs	2200	x4482
11C	How Many Squares? implementation	2200	x590
11B	Jumping Jack math	1600	x4342
11A	Increasing Sequence constructive algorithms, implementation, math	900	x12455
10E	Greedy Change constructive algorithms	2600	x803
10D	LCIS dp	2800	x4066
10C	Digital Root number theory	2000	x1394