Problemset - Codeforces

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Codeforces Round (Div. 3)
7 days

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Problems

#	Name
23E	Tree dp	2500	x593
23D	Tetragon geometry, math	2600	x327
23C	Oranges and Apples constructive algorithms, sortings	2500	x1367
23B	Party constructive algorithms, graphs, math	1600	x3222
23A	You're Given a String... brute force, greedy	1200	x5114
22E	Scheme dfs and similar, graphs, trees	2300	x1560
22D	Segments greedy, sortings	1900	x2637
22C	System Administrator graphs	1700	x2978
22B	Bargaining Table brute force, dp	1500	x4107
22A	Second Order Statistics brute force	800	x21188
21D	Traveling Graph bitmasks, graph matchings, graphs	2400	x810
21C	Stripe 2 binary search, dp, sortings	2000	x2039
21B	Intersection implementation, math	2000	x1312
21A	Jabber ID implementation, strings	1900	x1797
20C	Dijkstra? graphs, shortest paths	1900	x30831
20B	Equation math	2000	x3696
20A	BerOS file system implementation	1700	x6002
19E	Fairy dfs and similar, divide and conquer, dsu	2900	x1653
19D	Points data structures	2800	x2175
19C	Deletion of Repeats greedy, hashing, string suffix structures	2200	x1055
19B	Checkout Assistant dp	1900	x4492
19A	World Football Cup implementation	1400	x2657
18E	Flag 2 dp	2000	x1028
18D	Seller Bob brute force, dp, greedy	2000	x1037
18C	Stripe data structures, implementation	1200	x12586
18B	Platforms brute force, math	1700	x2079
18A	Triangle brute force, geometry	1500	x5743
17E	Palisection strings	2900	x1519
17D	Notepad number theory	2400	x1041
17C	Balance dp	2500	x821
17B	Hierarchy dfs and similar, dsu, greedy, shortest paths	1500	x4540
17A	Noldbach problem brute force, math, number theory	1000	x15349
16E	Fish bitmasks, dp, probabilities	1900	x4736
16D	Logging implementation, strings	1900	x1523
16C	Monitor binary search, number theory	1800	x4569
16B	Burglar and Matches greedy, implementation, sortings	900	x17125
16A	Flag implementation	800	x13744
15E	Triangles combinatorics, dp	2600	x561
15D	Map data structures, implementation, sortings	2500	x727
15C	Industrial Nim games	2000	x2174
15B	Laser math	1800	x1307
15A	Cottage Village implementation, sortings	1200	x3639
14E	Camels dp	1900	x1625
14D	Two Paths dfs and similar, dp, graphs, shortest paths, trees, two pointers	1900	x4342
14C	Four Segments brute force, constructive algorithms, geometry, implementation, math	1700	x3165
14B	Young Photographer implementation	1000	x6758
14A	Letter implementation	800	x10172
13E	Holes data structures, dsu	2700	x5459
13D	Triangles dp, geometry	2600	x601
13C	Sequence dp, sortings	2200	x4225
13B	Letter A geometry, implementation	2000	x888
13A	Numbers implementation, math	1000	x7466
12E	Start of the session constructive algorithms	2100	x1169
12D	Ball data structures, sortings	2400	x2078
12C	Fruits greedy, implementation, sortings	1100	x5881
12B	Correct Solution? implementation, sortings	1100	x8178
12A	Super Agent implementation	800	x12542
11E	Forward, march! binary search, dp, greedy	2800	x348
11D	A Simple Task bitmasks, dp, graphs	2200	x4532
11C	How Many Squares? implementation	2200	x595
11B	Jumping Jack math	1600	x4441
11A	Increasing Sequence constructive algorithms, implementation, math	900	x12648
10E	Greedy Change constructive algorithms	2600	x809
10D	LCIS dp	2800	x4100
10C	Digital Root number theory	2000	x1408
10B	Cinema Cashier dp, implementation	1500	x1730
10A	Power Consumption Calculation implementation	900	x6920
9E	Interestring graph and Apples dfs and similar, dsu, graphs	2300	x997
9D	How many trees? combinatorics, divide and conquer, dp	1900	x3696
9C	Hexadecimal's Numbers brute force, implementation, math	1200	x12600
9B	Running Student brute force, geometry, implementation	1200	x5363
9A	Die Roll math, probabilities	800	x53500
8E	Beads dp, graphs	2600	x669
8D	Two Friends binary search, geometry	2600	x513
8C	Looking for Order bitmasks, dp	2000	x3396
8B	Obsession with Robots constructive algorithms, graphs, implementation	1400	x4234
8A	Train and Peter strings	1200	x5677
7E	Defining Macros dp, expression parsing, implementation	2600	x693
7D	Palindrome Degree hashing, strings	2200	x3543
7C	Line math, number theory	1800	x4412
7B	Memory Manager implementation	1600	x2530
7A	Kalevitch and Chess brute force, constructive algorithms	1100	x7038
6E	Exposition binary search, data structures, dsu, trees, two pointers	1900	x3159
6D	Lizards and Basements 2 brute force, dp	2600	x1952
6C	Alice, Bob and Chocolate greedy, two pointers	1200	x13262
6B	President's Office implementation	1100	x12400
6A	Triangle brute force, geometry	900	x19249
5E	Bindian Signalizing data structures	2400	x2024
5D	Follow Traffic Rules implementation, math	2100	x1655
5C	Longest Regular Bracket Sequence constructive algorithms, data structures, dp, greedy, sortings, strings	1900	x13002
5B	Center Alignment implementation, strings	1200	x5709
5A	Chat Servers Outgoing Traffic implementation	1000	x9461
4D	Mysterious Present dp, sortings	1700	x9911
4C	Registration System data structures, hashing, implementation	1300	x78637
4B	Before an Exam constructive algorithms, greedy	1200	x23959
4A	Watermelon brute force, math	800	x490036
3D	Least Cost Bracket Sequence greedy	2600	x3177
3C	Tic-tac-toe brute force, games, implementation	1800	x7083
3B	Lorry greedy, sortings	1900	x4405
3A	Shortest path of the king greedy, shortest paths	1000	x18699