Problemset - Codeforces

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

#	Name
293E	Close Vertices data structures, divide and conquer, trees	2700	x1483
293D	Ksusha and Square geometry, math, probabilities, two pointers	2700	x240
293C	Cube Problem brute force, math, number theory	2400	x580
293B	Distinct Paths brute force, combinatorics	2700	x883
293A	Weird Game games, greedy	1500	x2936
292E	Copying Data data structures	1900	x4255
292D	Connected Components data structures, dfs and similar, dp, dsu	1900	x2466
292C	Beautiful IP Addresses brute force	2000	x1176
292B	Network Topology graphs, implementation	1200	x8673
292A	SMSC implementation	1100	x2721
291E	Tree-String Problem *special problem, dfs and similar, hashing, strings	2000	x1329
291D	Parallel Programming *special problem, greedy	1600	x1486
291C	Network Mask *special problem, bitmasks, brute force, implementation	1600	x1688
291B	Command Line Arguments *special problem, implementation, strings	1300	x3038
291A	Spyke Talks *special problem, implementation, sortings	800	x6166
290F	Greedy Petya *special problem, dfs and similar, graphs, greedy	2800	x134
290E	HQ *special problem, constructive algorithms	2500	x206
290D	Orange *special problem, implementation	1400	x1818
290C	WTF? *special problem, graph matchings, implementation, trees	1700	x1555
290B	QR code *special problem, implementation	1500	x2458
290A	Mysterious strings *special problem, implementation	1400	x3016
289B	Polo the Penguin and Matrix brute force, dp, implementation, sortings, ternary search	1400	x17629
289A	Polo the Penguin and Segments brute force, implementation	1100	x9439
288E	Polo the Penguin and Lucky Numbers dp, implementation, math	2800	x301
288D	Polo the Penguin and Trees combinatorics, dfs and similar, trees	2400	x760
288C	Polo the Penguin and XOR operation implementation, math	1700	x2347
288B	Polo the Penguin and Houses combinatorics	1500	x2958
288A	Polo the Penguin and Strings greedy	1300	x6529
287B	Pipeline binary search, math	1700	x10148
287A	IQ Test brute force, implementation	1100	x20255
286E	Ladies' Shop constructive algorithms, fft, math	2800	x835
286D	Tourists data structures, sortings	2600	x379
286C	Main Sequence greedy, implementation	2100	x1534
286B	Shifting implementation	2200	x1127
286A	Lucky Permutation constructive algorithms, math	1400	x3204
285E	Positions in Permutations combinatorics, dp, math	2600	x1014
285D	Permutation Sum bitmasks, combinatorics, dp, implementation, meet-in-the-middle	1900	x1565
285C	Building Permutation greedy, implementation, sortings	1200	x23616
285B	Find Marble implementation	1200	x15160
285A	Slightly Decreasing Permutations greedy, implementation	1100	x13489
284B	Cows and Poker Game brute force, implementation	1000	x6944
284A	Cows and Primitive Roots implementation, math, number theory	1400	x6653
283E	Cow Tennis Tournament combinatorics, data structures, math	2800	x781
283D	Cows and Cool Sequences dp, math, number theory	2400	x555
283C	Coin Troubles dp	2100	x1469
283B	Cow Program dfs and similar, dp, graphs	1700	x3681
283A	Cows and Sequence constructive algorithms, data structures, implementation	1600	x6612
282E	Sausage Maximization bitmasks, data structures, trees	2200	x3701
282D	Yet Another Number Game dp, games	2100	x1452
282C	XOR and OR constructive algorithms, implementation, math	1500	x9531
282B	Painting Eggs greedy, math	1500	x13148
282A	Bit++ implementation	800	x277945
281B	Nearest Fraction brute force, implementation, two pointers	1700	x3049
281A	Word Capitalization implementation, strings	800	x222244
280E	Sequence Transformation brute force, data structures, dp, implementation, math	3000	x208
280D	k-Maximum Subsequence Sum data structures, flows, graphs, implementation	2800	x1364
280C	Game on Tree implementation, math, probabilities, trees	2200	x4222
280B	Maximum Xor Secondary data structures, implementation, two pointers	1800	x4792
280A	Rectangle Puzzle geometry	2000	x1476
279E	Beautiful Decomposition dp, games, greedy, number theory	1900	x1459
279D	The Minimum Number of Variables bitmasks, dp	2200	x784
279C	Ladder dp, implementation, two pointers	1700	x8345
279B	Books binary search, brute force, implementation, two pointers	1400	x55785
279A	Point on Spiral brute force, geometry, implementation	1400	x5645
278B	New Problem brute force, strings	1500	x3475
278A	Circle Line implementation	800	x11960
277E	Binary Tree on Plane flows, trees	2400	x1339
277D	Google Code Jam dp, probabilities	2800	x341
277C	Game games, implementation	2400	x458
277B	Set of Points constructive algorithms, geometry	2300	x818
277A	Learning Languages dfs and similar, dsu	1400	x19329
276E	Little Girl and Problem on Trees data structures, graphs, trees	2100	x1652
276D	Little Girl and Maximum XOR bitmasks, dp, greedy, implementation, math	1700	x14188
276C	Little Girl and Maximum Sum data structures, greedy, implementation, sortings	1500	x28626
276B	Little Girl and Game games, greedy	1300	x29177
276A	Lunch Rush implementation	900	x28072
275B	Convex Shape constructive algorithms, implementation	1700	x2847
275A	Lights Out implementation	900	x30965
274E	Mirror Room data structures, implementation	3000	x313
274D	Lovely Matrix dfs and similar, graphs, greedy, sortings	2200	x1048
274C	The Last Hole! brute force, geometry	2600	x350
274B	Zero Tree dfs and similar, dp, greedy, trees	1800	x5085
274A	k-Multiple Free Set binary search, greedy, sortings	1500	x10153
273E	Dima and Game dp, games	2600	x368
273D	Dima and Figure dp	2400	x425
272E	Dima and Horses combinatorics, constructive algorithms, graphs	2200	x1234
272D	Dima and Two Sequences combinatorics, math, sortings	1600	x2645
272C	Dima and Staircase data structures, implementation	1500	x6838
272B	Dima and Sequence implementation, math	1400	x4060
272A	Dima and Friends implementation, math	1000	x25139
271E	Three Horses constructive algorithms, math, number theory	2200	x518
271D	Good Substrings data structures, strings	1800	x11720
271C	Secret constructive algorithms, implementation	1500	x3010
271B	Prime Matrix binary search, brute force, math, number theory	1300	x13379
271A	Beautiful Year brute force	800	x145550
270B	Multithreading data structures, greedy, implementation	1400	x4204
270A	Fancy Fence geometry, implementation, math	1100	x46404
269E	String Theory geometry, math, strings	3100	x109
269D	Maximum Waterfall data structures, dp, graphs, sortings	2600	x453
269C	Flawed Flow constructive algorithms, flows, graphs, greedy	2100	x1695