Problemset - Codeforces

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IAEPC Preliminary Contest (Codeforces Round 999, Div. 1 + Div. 2)
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Problems

#	Name
21B	Intersection implementation, math	2000	x1378
21A	Jabber ID implementation, strings	1900	x1898
20C	Dijkstra? graphs, shortest paths	1900	x34406
20B	Equation math	2000	x4007
20A	BerOS file system implementation	1700	x6338
19E	Fairy dfs and similar, divide and conquer, dsu	2900	x2029
19D	Points data structures	2800	x2521
19C	Deletion of Repeats greedy, hashing, string suffix structures	2200	x1124
19B	Checkout Assistant dp	1900	x4977
19A	World Football Cup implementation	1400	x2817
18E	Flag 2 dp	2000	x1121
18D	Seller Bob brute force, dp, greedy	2000	x1086
18B	Platforms brute force, math	1700	x2173
18A	Triangle brute force, geometry	1500	x6194
17E	Palisection strings	2900	x1614
17D	Notepad number theory	2400	x1117
17C	Balance dp	2500	x947
17B	Hierarchy dfs and similar, dsu, greedy, shortest paths	1500	x5039
16E	Fish bitmasks, dp, probabilities	1900	x5341
16D	Logging implementation, strings	1900	x1641
16C	Monitor binary search, number theory	1800	x4867
15E	Triangles combinatorics, dp	2600	x593
15D	Map data structures, implementation, sortings	2500	x779
15C	Industrial Nim games	2000	x2371
15B	Laser math	1800	x1486
14E	Camels dp	1900	x1739
14D	Two Paths dfs and similar, dp, graphs, shortest paths, trees, two pointers	1900	x4654
14C	Four Segments brute force, constructive algorithms, geometry, implementation, math	1700	x3444
13E	Holes data structures, dsu	2700	x6285
13D	Triangles dp, geometry	2600	x669
13C	Sequence dp, sortings	2200	x4766
13B	Letter A geometry, implementation	2000	x1010
12E	Start of the session constructive algorithms	2100	x1255
12D	Ball data structures, sortings	2400	x2383
11E	Forward, march! binary search, dp, greedy	2800	x372
11D	A Simple Task bitmasks, dp, graphs	2200	x5078
11C	How Many Squares? implementation	2200	x623
11B	Jumping Jack math	1600	x4871
10E	Greedy Change constructive algorithms	2600	x843
10D	LCIS dp	2800	x4606
10C	Digital Root number theory	2000	x1479
10B	Cinema Cashier dp, implementation	1500	x1810
9E	Interestring graph and Apples dfs and similar, dsu, graphs	2300	x1060
9D	How many trees? combinatorics, divide and conquer, dp	1900	x3956
8E	Beads dp, graphs	2600	x702
8D	Two Friends binary search, geometry	2600	x535
8C	Looking for Order bitmasks, dp	2000	x3650
8B	Obsession with Robots constructive algorithms, graphs, implementation	1400	x4431
7E	Defining Macros dp, expression parsing, implementation	2600	x727
7D	Palindrome Degree hashing, strings	2200	x3841
7C	Line math, number theory	1800	x4725
7B	Memory Manager implementation	1600	x2640
6E	Exposition binary search, data structures, dsu, trees, two pointers	1900	x3379
6D	Lizards and Basements 2 brute force, dp	2600	x2036
5E	Bindian Signalizing data structures	2400	x2200
5D	Follow Traffic Rules implementation, math	2100	x1750
5C	Longest Regular Bracket Sequence constructive algorithms, data structures, dp, greedy, sortings, strings	1900	x14445
4D	Mysterious Present dp, sortings	1700	x10576
3D	Least Cost Bracket Sequence greedy	2600	x3452
3C	Tic-tac-toe brute force, games, implementation	1800	x7479
3B	Lorry greedy, sortings	1900	x4661
2C	Commentator problem geometry	2600	x1789
2B	The least round way dp, math	2000	x11167
2A	Winner hashing, implementation	1500	x27097
1C	Ancient Berland Circus geometry, math	2100	x5802
1B	Spreadsheet implementation, math	1600	x23283

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