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
177C2	Party brute force, dfs and similar, dsu, graphs	1500	x2656
177C1	Party dfs and similar, dsu, graphs	1500	x2657
177B2	Rectangular Game number theory	1200	x3101
177B1	Rectangular Game number theory	1000	x4379
177A2	Good Matrix Elements implementation	800	x7778
177A1	Good Matrix Elements implementation	800	x9700
176E	Archaeology data structures, dfs and similar, trees	3100	x1264
176D	Hyper String dp	2500	x334
176C	Playing with Superglue combinatorics, constructive algorithms	2000	x490
176B	Word Cut dp	1700	x1912
176A	Trading Business greedy, sortings	1200	x1536
175F	Gnomes of Might and Magic data structures, graphs, implementation, shortest paths	3000	x67
175E	Power Defence brute force, dp, geometry, greedy	2600	x273
175D	Plane of Tanks: Duel brute force, dp, math, probabilities	2400	x302
175C	Geometry Horse greedy, implementation, sortings, two pointers	1600	x1366
175B	Plane of Tanks: Pro implementation	1400	x1441
175A	Robot Bicorn Attack brute force, implementation	1400	x2431
174C	Range Increments data structures, greedy	1800	x1175
174B	File List dp, greedy, implementation	1400	x2321
174A	Problem About Equation math	1100	x3020
173E	Camping Groups data structures, sortings	2600	x579
173D	Deputies constructive algorithms, graphs, greedy, implementation	2500	x257
173C	Spiral Maximum brute force, dp	1900	x1014
173B	Chamber of Secrets dfs and similar, shortest paths	1800	x3345
173A	Rock-Paper-Scissors implementation, math	1300	x2348
172E	BHTML+BCSS *special problem, dfs and similar, expression parsing	2200	x273
172D	Calendar Reform *special problem, number theory	1500	x1415
172C	Bus *special problem, implementation, sortings	1500	x1155
172B	Pseudorandom Sequence Period *special problem, implementation, number theory	1200	x2808
172A	Phone Code *special problem, brute force, implementation	800	x6466
171H	A polyline *special problem, implementation	1700	x288
171G	Mysterious numbers - 2 *special problem	1600	x953
171F	ucyhf *special problem, brute force, implementation, number theory	1600	x1308
171E	MYSTERIOUS LANGUAGE *special problem	2000	x1491
171D	Broken checker *special problem, brute force	1300	x2617
171C	A Piece of Cake *special problem, implementation	2000	x1111
171B	Star *special problem, combinatorics	1300	x4131
171A	Mysterious numbers - 1 *special problem, constructive algorithms	1200	x4567
169B	Replacing Digits greedy	1100	x3402
169A	Chores sortings	800	x7168
168B	Wizards and Minimal Spell implementation, strings	1700	x1227
168A	Wizards and Demonstration implementation, math	900	x10788
167E	Wizards and Bets dfs and similar, graphs, math, matrices	2900	x585
167D	Wizards and Roads data structures, divide and conquer, graph matchings, graphs, greedy	3000	x201
167C	Wizards and Numbers games, math	2300	x687
167B	Wizards and Huge Prize dp, math, probabilities	1800	x2217
167A	Wizards and Trolleybuses implementation, math	1600	x2055
166E	Tetrahedron dp, math, matrices	1500	x22023
166D	Shoe Store dp, graph matchings, greedy, sortings, two pointers	2500	x369
166C	Median greedy, math, sortings	1500	x6632
166B	Polygons geometry, sortings	2100	x2558
166A	Rank List binary search, implementation, sortings	1100	x18327
165E	Compatible Numbers bitmasks, brute force, dfs and similar, dp	2200	x7336
165D	Beard Graph data structures, dsu, trees	2100	x1729
165C	Another Problem on Strings binary search, brute force, dp, math, strings, two pointers	1600	x12733
165B	Burning Midnight Oil binary search, implementation	1500	x19238
165A	Supercentral Point implementation	1000	x24274
164E	Polycarpus and Tasks	3100	x70
164D	Minimum Diameter binary search, brute force	3100	x251
164C	Machine Programming flows, graphs	2400	x909
164B	Ancient Berland Hieroglyphs two pointers	2000	x482
164A	Variable, or There and Back Again dfs and similar, graphs	1700	x1023
163E	e-Government data structures, dfs and similar, dp, strings, trees	2800	x1797
163D	Large Refrigerator brute force	2900	x523
163C	Conveyor sortings, two pointers	2100	x562
163B	Lemmings binary search	2000	x1074
163A	Substring and Subsequence dp	1700	x2766
162J	Brackets *special problem	1800	x99
162I	Truncatable primes *special problem	2000	x78
162H	Alternating case *special problem	1800	x222
162G	Non-decimal sum *special problem	2000	x68
162F	Factorial zeros *special problem	1800	x205
162E	HQ9+ *special problem	1800	x179
162D	Remove digits *special problem	1900	x229
162C	Prime factorization *special problem	1800	x865
162B	Binary notation *special problem	1800	x315
162A	Pentagonal numbers *special problem, implementation	1100	x818
161E	Polycarpus the Safecracker brute force, dp	2500	x477
161D	Distance in Tree dfs and similar, dp, trees	1800	x15823
161C	Abracadabra divide and conquer	2400	x658
161B	Discounts constructive algorithms, greedy, sortings	1700	x1971
161A	Dress'em in Vests! binary search, brute force, greedy, two pointers	1300	x4980
160E	Buses and People binary search, data structures, sortings	2400	x600
160D	Edges in MST dfs and similar, dsu, graphs, sortings	2300	x2891
160C	Find Pair implementation, math, sortings	1700	x3487
160B	Unlucky Ticket greedy, sortings	1100	x14357
160A	Twins greedy, sortings	900	x123719
159E	Zebra Tower *special problem, data structures, greedy, sortings	1700	x1010
159D	Palindrome pairs *special problem, brute force, dp, strings	1500	x4426
159C	String Manipulation 1.0 *special problem, binary search, brute force, data structures, strings	1400	x3041
159B	Matchmaker *special problem, greedy, sortings	1100	x3845
159A	Friends or Not *special problem, greedy, implementation	1400	x2505
158E	Phone Talks *special problem, dp, sortings	1900	x1469
158D	Ice Sculptures *special problem, brute force, number theory	1300	x6280
158C	Cd and pwd commands *special problem, data structures, implementation	1400	x9487
158B	Taxi *special problem, greedy, implementation	1100	x90521
158A	Next Round *special problem, implementation	800	x266641
157B	Trace geometry, sortings	1000	x13438
157A	Game Outcome brute force	800	x7808
156E	Mrs. Hudson's Pancakes brute force, dp	3000	x169