Problemset - Codeforces

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XIX Open Olympiad in Informatics - Final Stage, Day 1 (Unrated, Online Mirror, IOI rules)
2 days

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Problems

#	Name
198C	Delivering Carcinogen binary search, geometry	2400	x379
198B	Jumping on Walls shortest paths	1400	x4496
198A	About Bacteria implementation, math	1700	x3192
197B	Limit math	1400	x4699
197A	Plate Game constructive algorithms, games, math	1600	x6460
196E	Opening Portals dsu, graphs, shortest paths	2600	x1054
196D	The Next Good String data structures, greedy, hashing, strings	2800	x546
196C	Paint Tree constructive algorithms, divide and conquer, geometry, sortings, trees	2200	x973
196B	Infinite Maze dfs and similar, graphs	2000	x2259
196A	Lexicographically Maximum Subsequence greedy, strings	1100	x5504
195E	Building Forest data structures, dsu, graphs	2000	x738
195D	Analyzing Polyline geometry, math, sortings	1900	x1050
195C	Try and Catch expression parsing, implementation	1800	x1151
195B	After Training data structures, implementation, math	1300	x5246
195A	Let's Watch Football binary search, brute force, math	1000	x9255
194B	Square math	1200	x3608
194A	Exams implementation, math	900	x10106
193E	Fibonacci Number brute force, math, matrices	2900	x347
193D	Two Segments data structures	2900	x576
193C	Hamming Distance constructive algorithms, greedy, math, matrices	2400	x520
193B	Xor brute force	2000	x1029
193A	Cutting Figure constructive algorithms, graphs, trees	1700	x4099
192B	Walking in the Rain brute force, implementation	1100	x6356
192A	Funky Numbers binary search, brute force, implementation	1300	x10568
191E	Thwarting Demonstrations binary search, data structures, trees	2200	x874
191D	Metro Scheme graphs, greedy	2700	x371
191C	Fools and Roads data structures, dfs and similar, trees	1900	x7563
191B	Demonstration greedy	1700	x1022
191A	Dynasty Puzzles dp	1500	x4133
190E	Counter Attack data structures, dsu, graphs, hashing, sortings	2100	x1583
190D	Non-Secret Cypher two pointers	1900	x2387
190C	STL dfs and similar	1500	x2941
190B	Surrounded geometry	1800	x2917
190A	Vasya and the Bus greedy, math	1100	x5944
189B	Counting Rhombi brute force, math	1300	x3994
189A	Cut Ribbon brute force, dp	1300	x70151
188H	Stack *special problem, expression parsing, implementation	1800	x268
188G	Array Sorting *special problem, implementation	1600	x337
188F	Binary Notation *special problem, implementation	1400	x309
188E	HQ9+ *special problem, implementation	1400	x507
188D	Asterisks *special problem, implementation	1100	x688
188C	LCM *special problem, implementation, math	1400	x463
188B	A + Reverse B *special problem, implementation	1300	x744
188A	Hexagonal Numbers *special problem	1100	x787
187E	Heaven Tour data structures, greedy	2900	x107
187D	BRT Contract data structures	2800	x550
187C	Weak Memory dfs and similar, dsu	2000	x1395
187B	AlgoRace dp, shortest paths	1800	x2020
187A	Permutations greedy	1500	x2869
186B	Growing Mushrooms greedy, sortings	1200	x5722
186A	Comparing Strings implementation, strings	1100	x17451
185E	Soap Time! - 2 binary search, data structures	3000	x147
185D	Visit of the Great math, number theory	2600	x458
185C	Clever Fat Rat dp	2500	x142
185B	Mushroom Scientists math, ternary search	1800	x1684
185A	Plant math	1300	x6026
183E	Candy Shop greedy	2900	x140
183D	T-shirt dp, greedy, probabilities	2700	x411
183C	Cyclic Coloring dfs and similar	2200	x650
183B	Zoo brute force, geometry	1700	x706
183A	Headquarters constructive algorithms, math	1700	x567
182E	Wooden Fence dp	1800	x1501
182D	Common Divisors brute force, hashing, implementation, math, strings	1400	x8257
182C	Optimal Sum data structures, greedy	2000	x758
182B	Vasya's Calendar implementation	1000	x7012
182A	Battlefield geometry, graphs, implementation, shortest paths	2200	x292
181B	Number of Triplets binary search, brute force	1300	x3107
181A	Series of Crimes brute force, geometry, implementation	800	x7516
180F	Mathematical Analysis Rocks! constructive algorithms, implementation, math	1200	x2564
180E	Cubes binary search, dp, two pointers	1800	x1872
180D	Name greedy, strings	1900	x741
180C	Letter dp	1400	x7680
180B	Divisibility Rules math, number theory	2300	x369
180A	Defragmentation implementation	1800	x555
178F3	Representative Sampling	2500	x451
178F2	Representative Sampling dp, sortings, strings	2200	x362
178F1	Representative Sampling	1800	x417
178E3	The Beaver's Problem - 2	2300	x203
178E2	The Beaver's Problem - 2	2000	x234
178E1	The Beaver's Problem - 2	1900	x293
178D3	Magic Squares	2100	x251
178D2	Magic Squares	1900	x274
178D1	Magic Squares	1500	x656
178C3	Smart Beaver and Resolving Collisions	2000	x330
178C2	Smart Beaver and Resolving Collisions	1900	x311
178C1	Smart Beaver and Resolving Collisions	1600	x501
178B3	Greedy Merchants	1800	x1275
178B2	Greedy Merchants	1600	x689
178B1	Greedy Merchants	1600	x776
178A3	Educational Game greedy	1100	x1475
178A2	Educational Game greedy	1000	x1677
178A1	Educational Game	1000	x1660
177G2	Fibonacci Strings matrices, strings	2600	x207
177G1	Fibonacci Strings strings	2400	x192
177F2	Script Generation	2300	x213
177F1	Script Generation	1800	x307
177E2	Space Voyage binary search	1900	x442
177E1	Space Voyage binary search	1700	x634
177D2	Encrypting Messages data structures	1500	x2120
177D1	Encrypting Messages brute force	1200	x2265