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
222D	Olympiad binary search, greedy, sortings, two pointers	1900	x2188
222C	Reducing Fractions implementation, math, number theory, sortings	1800	x2443
222B	Cosmic Tables data structures, implementation	1300	x6218
222A	Shooshuns and Sequence brute force, implementation	1200	x11055
221B	Little Elephant and Numbers implementation	1300	x4645
221A	Little Elephant and Function implementation, math	1000	x15641
220E	Little Elephant and Inversions data structures, two pointers	2400	x1455
220D	Little Elephant and Triangle geometry, math	2500	x290
220C	Little Elephant and Shifts data structures	2100	x960
220B	Little Elephant and Array constructive algorithms, data structures	1800	x10798
220A	Little Elephant and Problem implementation, sortings	1300	x12141
219E	Parking Lot data structures	2200	x628
219D	Choosing Capital for Treeland dfs and similar, dp, graphs, trees	1700	x10039
219C	Color Stripe brute force, dp, greedy	1600	x6759
219B	Special Offer! Super Price 999 Bourles! implementation	1400	x5882
219A	k-String implementation, strings	1000	x29122
218B	Airport implementation	1100	x17032
218A	Mountain Scenery brute force, constructive algorithms, implementation	1100	x9745
217E	Alien DNA data structures, dsu, trees	2800	x331
217D	Bitonix' Patrol bitmasks, brute force, combinatorics, dfs and similar, math	2900	x253
217C	Formurosa divide and conquer, dp, expression parsing	2600	x342
217B	Blackboard Fibonacci brute force, math	2100	x919
217A	Ice Skating brute force, dfs and similar, dsu, graphs	1200	x21725
216E	Martian Luck math, number theory	2000	x595
216D	Spider's Web binary search, sortings, two pointers	1700	x1367
216C	Hiring Staff greedy	1800	x1863
216B	Forming Teams dfs and similar, implementation	1700	x6537
216A	Tiling with Hexagons implementation, math	1200	x5071
215E	Periodical Numbers combinatorics, dp, number theory	2100	x585
215D	Hot Days greedy	1900	x1617
215C	Crosses brute force, implementation	2100	x682
215B	Olympic Medal greedy, math	1300	x5684
215A	Bicycle Chain brute force, implementation	900	x14956
214B	Hometask brute force, constructive algorithms, greedy, math	1600	x5048
214A	System of Equations brute force	800	x37087
213E	Two Permutations data structures, hashing, strings	2700	x851
213D	Stars constructive algorithms, geometry	2300	x345
213C	Relay Race dp	2000	x2961
213B	Numbers combinatorics, dp	1900	x1804
213A	Game dfs and similar, greedy	1700	x1739
212E	IT Restaurants dfs and similar, dp, trees	1500	x1832
212D	Cutting a Fence binary search, data structures, dsu	2500	x528
212C	Cowboys combinatorics, dp, math	2100	x401
212B	Polycarpus is Looking for Good Substrings bitmasks, hashing, implementation	2300	x339
212A	Privatization flows, graphs	3000	x207
209C	Trails and Glades constructive algorithms, dsu, graphs, greedy	2400	x787
209B	Pixels constructive algorithms, math	2100	x421
209A	Multicolored Marbles dp, math	1600	x2449
208E	Blood Cousins binary search, data structures, dfs and similar, trees	2100	x7200
208D	Prizes, Prizes, more Prizes implementation	1200	x7695
208C	Police Station dp, graphs, shortest paths	1900	x1929
208B	Solitaire dfs and similar, dp	1900	x1382
208A	Dubstep strings	900	x92714
207D9	The Beaver's Problem - 3	1800	x91
207D8	The Beaver's Problem - 3	2300	x95
207D7	The Beaver's Problem - 3	1600	x102
207D6	The Beaver's Problem - 3	2100	x84
207D5	The Beaver's Problem - 3	1600	x148
207D4	The Beaver's Problem - 3	2100	x155
207D3	The Beaver's Problem - 3	2000	x136
207D2	The Beaver's Problem - 3	2000	x111
207D10	The Beaver's Problem - 3	2100	x82
207D1	The Beaver's Problem - 3	1800	x117
207C3	Game with Two Trees data structures	2700	x144
207C2	Game with Two Trees	2200	x93
207C1	Game with Two Trees	2100	x110
207B3	Military Trainings	1700	x184
207B2	Military Trainings	1900	x198
207B1	Military Trainings	1600	x290
207A3	Beaver's Calculator 1.0 greedy	2000	x224
207A2	Beaver's Calculator 1.0 greedy	1800	x245
207A1	Beaver's Calculator 1.0 greedy	1600	x307
205B	Little Elephant and Sorting brute force, greedy	1400	x6085
205A	Little Elephant and Rozdil brute force, implementation	900	x23136
204E	Little Elephant and Strings data structures, implementation, string suffix structures, two pointers	2800	x1223
204D	Little Elephant and Retro Strings dp	2400	x591
204C	Little Elephant and Furik and Rubik math, probabilities	2000	x1142
204B	Little Elephant and Cards binary search, data structures	1500	x5389
204A	Little Elephant and Interval binary search, combinatorics, dp	1500	x5933
203E	Transportation greedy, sortings, two pointers	2300	x289
203D	Hit Ball geometry, implementation, math	1700	x1422
203C	Photographer greedy, sortings	1400	x5758
203B	Game on Paper brute force, implementation	1300	x2631
203A	Two Problems brute force, implementation	1200	x4226
202B	Brand New Easy Problem brute force	1700	x822
202A	LLPS binary search, bitmasks, brute force, greedy, implementation, strings	800	x17476
201E	Thoroughly Bureaucratic Organization binary search, combinatorics	2600	x433
201D	Brand New Problem bitmasks, brute force, dp	2600	x423
201C	Fragile Bridges dp	2000	x1389
201B	Guess That Car! math, ternary search	1800	x1322
201A	Clear Symmetry constructive algorithms, dp, math	1700	x3030
200E	Tractor College implementation, math, number theory, ternary search	2400	x349
200D	Programming Language binary search, brute force, expression parsing, implementation	1800	x920
200C	Football Championship brute force, implementation	1800	x1066
200B	Drinks implementation, math	800	x124533
200A	Cinema brute force, data structures	2400	x696
199B	Special Olympics geometry	1900	x809
199A	Hexadecimal's theorem brute force, constructive algorithms, implementation, number theory	900	x27490
198E	Gripping Story binary search, data structures, sortings	2400	x453
198D	Cube Snake constructive algorithms	2700	x107