Problemset - Codeforces

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

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Problems

#	Name
245H	Queries for Number of Palindromes dp, hashing, strings	1800	x7240
245G	Suggested Friends brute force, graphs	2200	x471
245F	Log Stream Analysis binary search, brute force, implementation, strings	2000	x904
245E	Mishap in Club greedy, implementation	1400	x3358
245D	Restoring Table constructive algorithms, greedy	1500	x2386
245C	Game with Coins greedy	1700	x1567
245B	Internet Address implementation, strings	1100	x5307
245A	System Administrator implementation	800	x8603
244B	Undoubtedly Lucky Numbers bitmasks, brute force, dfs and similar	1600	x4573
244A	Dividing Orange implementation	900	x8050
243E	Matrix data structures	3000	x199
243D	Cubes data structures, dp, geometry, two pointers	2700	x224
243C	Colorado Potato Beetle dfs and similar, implementation	2200	x533
243B	Hydra graphs, sortings	2000	x1250
243A	The Brand New Function bitmasks	1600	x4031
242E	XOR on Segment bitmasks, data structures	2000	x9974
242D	Dispute dfs and similar, graphs, greedy	2100	x1909
242C	King's Path dfs and similar, graphs, hashing, shortest paths	1800	x9107
242B	Big Segment implementation, sortings	1100	x16180
242A	Heads or Tails brute force, implementation	1100	x6470
241G	Challenging Balloons constructive algorithms	1900	x552
241F	Race brute force, implementation	2300	x267
241E	Flights graphs, shortest paths	2600	x1198
241D	Numbers	2900	x385
241C	Mirror Box geometry, implementation	2000	x514
241B	Friends binary search, bitmasks, data structures, math	2700	x893
241A	Old Peykan greedy	1300	x2269
240F	TorCoder data structures	2600	x2031
240E	Road Repairs dfs and similar, graphs, greedy	2800	x361
239B	Easy Tape Programming brute force, implementation	1500	x1379
239A	Two Bags of Potatoes greedy, implementation, math	1200	x19389
238E	Meeting Her dp, graphs, shortest paths	2600	x401
238D	Tape Programming data structures, implementation	2900	x256
238C	World Eater Brothers dfs and similar, dp, greedy, trees	2100	x1267
238B	Boring Partition constructive algorithms	1800	x1343
238A	Not Wool Sequences constructive algorithms, math	1300	x2061
237E	Build String flows, graphs	2000	x1800
237D	T-decomposition dfs and similar, graphs, greedy, trees	2000	x580
237C	Primes on Interval binary search, number theory, two pointers	1600	x5993
237B	Young Table implementation, sortings	1500	x2247
237A	Free Cash implementation	1000	x27515
236B	Easy Number Challenge implementation, number theory	1300	x14815
236A	Boy or Girl brute force, implementation, strings	800	x227824
235E	Number Challenge combinatorics, dp, implementation, math, number theory	2600	x798
235D	Graph Game graphs	3000	x513
235C	Cyclical Quest data structures, string suffix structures, strings	2700	x2190
235B	Let's Play Osu! dp, math, probabilities	2000	x3684
235A	LCM Challenge number theory	1600	x18454
234H	Merging Two Decks constructive algorithms, greedy	2000	x579
234G	Practice constructive algorithms, divide and conquer, implementation	1600	x1500
234F	Fence dp	1800	x1801
234E	Champions' League implementation	1600	x1008
234D	Cinema implementation	1600	x1555
234C	Weather dp, implementation	1300	x5640
234B	Reading sortings	1000	x7224
234A	Lefthanders and Righthanders implementation	1200	x4507
233B	Non-square Equation binary search, brute force, math	1400	x7640
233A	Perfect Permutation implementation, math	800	x44333
232E	Quick Tortoise bitmasks, divide and conquer, dp	3000	x711
232D	Fence binary search, data structures, string suffix structures	2900	x492
232C	Doe Graphs constructive algorithms, divide and conquer, dp, graphs, shortest paths	2600	x294
232B	Table bitmasks, combinatorics, dp, math	1900	x1496
232A	Cycles binary search, constructive algorithms, graphs, greedy	1600	x2614
231E	Cactus data structures, dfs and similar, dp, graphs, trees	2100	x1980
231D	Magic Box brute force, geometry	1600	x4161
231C	To Add or Not to Add binary search, sortings, two pointers	1600	x8840
231B	Magic, Wizardry and Wonders constructive algorithms, greedy	1500	x3673
231A	Team brute force, greedy	800	x351516
230B	T-primes binary search, implementation, math, number theory	1300	x80265
230A	Dragons greedy, sortings	1000	x83549
229E	Gifts combinatorics, dp, math, probabilities	2600	x476
229D	Towers dp, greedy, two pointers	2100	x2341
229C	Triangles combinatorics, graphs, math	1900	x1656
229B	Planets binary search, data structures, graphs, shortest paths	1700	x4849
229A	Shifts brute force, two pointers	1500	x3570
228E	The Road to Berland is Paved With Good Intentions 2-sat, dfs and similar, dsu, graphs	1900	x2561
228D	Zigzag data structures	2100	x391
228C	Fractal Detector dp, hashing	2000	x472
228B	Two Tables brute force, implementation	1400	x3489
228A	Is your horseshoe on the other hoof? implementation	800	x117400
227B	Effective Approach implementation	1100	x29247
227A	Where do I Turn? geometry	1300	x4327
226E	Noble Knight's Path data structures, trees	2900	x484
226D	The table constructive algorithms, greedy	2100	x993
226C	Anniversary data structures, implementation, math, matrices, number theory	2400	x924
226B	Naughty Stone Piles greedy	1900	x1590
226A	Flying Saucer Segments math	1400	x4064
225E	Unsolvable math, number theory	2100	x834
225D	Snake bitmasks, dfs and similar, graphs, implementation	2200	x957
225C	Barcode dp, matrices	1700	x9463
225B	Well-known Numbers binary search, greedy, number theory	1600	x3204
225A	Dice Tower constructive algorithms, greedy	1100	x12079
224B	Array bitmasks, implementation, two pointers	1500	x7470
224A	Parallelepiped brute force, geometry, math	1100	x27691
223E	Planar Graph flows, geometry, graphs	3000	x193
223D	Spider geometry, graphs	3000	x74
223C	Partial Sums combinatorics, math, number theory	1900	x1611
223B	Two Strings data structures, dp, strings	1900	x1843
223A	Bracket Sequence data structures, expression parsing, implementation	1700	x2565
222E	Decoding Genome dp, matrices	1900	x2936