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
321C	Ciel the Commander constructive algorithms, dfs and similar, divide and conquer, greedy, trees	2100	x7805
321B	Ciel and Duel dp, flows, greedy	1900	x3252
321A	Ciel and Robot binary search, implementation, math	1700	x3664
320B	Ping-Pong (Easy Version) dfs and similar, graphs	1500	x7389
320A	Magic Numbers brute force, greedy	900	x40430
319E	Ping-Pong data structures	3000	x672
319D	Have You Ever Heard About the Word? greedy, hashing, string suffix structures, strings	2800	x678
319C	Kalila and Dimna in the Logging Industry dp, geometry	2100	x5458
319B	Psychos in a Line data structures, implementation	1900	x4292
319A	Malek Dance Club combinatorics, math	1600	x2859
318B	Strings of Power implementation, strings, two pointers	1300	x7825
318A	Even Odds math	900	x121143
317E	Princess and Her Shadow constructive algorithms, shortest paths	3100	x160
317D	Game with Powers dp, games	2300	x1101
317C	Balance constructive algorithms, dfs and similar, graphs, trees	2500	x516
317B	Ants brute force, implementation	2000	x1612
317A	Perfect Pair brute force	1600	x4717
316G3	Good Substrings string suffix structures	2400	x508
316G2	Good Substrings string suffix structures	2200	x487
316G1	Good Substrings hashing, strings	1700	x1016
316F3	Suns and Rays constructive algorithms, dfs and similar, implementation	2200	x184
316F2	Suns and Rays	2300	x167
316F1	Suns and Rays dfs and similar, implementation	2200	x181
316E3	Summer Homework data structures, math	2300	x535
316E2	Summer Homework data structures, math	2300	x401
316E1	Summer Homework brute force, data structures	1500	x1491
316D3	PE Lesson dp, math	2400	x614
316D2	PE Lesson dp	2300	x468
316D1	PE Lesson brute force, dp	2300	x538
316C2	Tidying Up flows, graph matchings	2300	x639
316C1	Tidying Up flows	2200	x563
316B2	EKG dfs and similar, dp	1600	x1610
316B1	EKG brute force, dfs and similar	1500	x1398
316A2	Special Task math	1400	x2168
316A1	Special Task greedy	1100	x2705
315B	Sereja and Array implementation	1200	x7119
315A	Sereja and Bottles brute force	1400	x11456
314E	Sereja and Squares dp	2900	x373
314D	Sereja and Straight Lines binary search, data structures, geometry, sortings, two pointers	2500	x537
314C	Sereja and Subsequences data structures, dp	2000	x1862
314B	Sereja and Periods binary search, dfs and similar, strings	2000	x1548
314A	Sereja and Contest implementation	1600	x2106
313E	Ilya and Two Numbers constructive algorithms, data structures, dsu, greedy	2300	x562
313D	Ilya and Roads dp	2100	x1513
313C	Ilya and Matrix constructive algorithms, greedy, implementation, sortings	1400	x5697
313B	Ilya and Queries dp, implementation	1100	x46537
313A	Ilya and Bank Account implementation, number theory	900	x58642
312B	Archer math, probabilities	1300	x11990
312A	Whose sentence is it? implementation, strings	1100	x5093
311E	Biologist flows	2300	x1288
311D	Interval Cubing data structures, math	2600	x682
311C	Fetch the Treasure brute force, data structures, graphs, shortest paths	2500	x493
311B	Cats Transport data structures, dp	2400	x3625
311A	The Closest Pair constructive algorithms, implementation	1300	x4092
309E	Sheep binary search, greedy	2900	x235
309D	Tennis Rackets brute force, geometry	2700	x176
309C	Memory for Arrays binary search, bitmasks, greedy	1900	x1381
309B	Context Advertising dp, two pointers	2100	x738
309A	Morning run binary search, math, two pointers	2000	x494
306D	Polygon constructive algorithms, geometry	2300	x298
306C	White, Black and White Again combinatorics, number theory	2100	x514
306B	Optimizer data structures, greedy, sortings	2100	x462
306A	Candies implementation	800	x7293
305E	Playing with String games	2300	x656
305D	Olya and Graph combinatorics, math	2200	x517
305C	Ivan and Powers of Two greedy, implementation	1600	x2488
305B	Continued Fractions brute force, implementation, math	1700	x2166
305A	Strange Addition brute force, constructive algorithms, implementation	1600	x4918
304B	Calendar brute force, implementation	1300	x3009
304A	Pythagorean Theorem II brute force, math	1200	x11087
303E	Random Ranking dp, math, probabilities	3000	x331
303D	Rotatable Number math, number theory	2600	x303
303C	Minimum Modular brute force, graphs, math, number theory	2400	x901
303B	Rectangle Puzzle II implementation, math	1700	x1348
303A	Lucky Permutation Triple constructive algorithms, implementation, math	1300	x8087
302B	Eugeny and Play List binary search, implementation, two pointers	1200	x8606
302A	Eugeny and Array implementation	800	x9217
301E	Yaroslav and Arrangements dp	2800	x371
301D	Yaroslav and Divisors data structures	2200	x2543
301C	Yaroslav and Algorithm constructive algorithms	2500	x479
301B	Yaroslav and Time binary search, graphs, shortest paths	2100	x2448
301A	Yaroslav and Sequence constructive algorithms	1800	x3106
300E	Empire Strikes Back binary search, math, number theory	2300	x1053
300D	Painting Square dp, fft	2300	x771
300C	Beautiful Numbers brute force, combinatorics	1800	x9996
300B	Coach brute force, dfs and similar, graphs	1500	x6543
300A	Array brute force, constructive algorithms, implementation	1100	x23713
299B	Ksusha the Squirrel brute force, implementation	900	x5571
299A	Ksusha and Array brute force, number theory, sortings	1000	x8365
298B	Sail brute force, greedy, implementation	1200	x14602
298A	Snow Footprints greedy, implementation	1300	x11129
297E	Mystic Carvings data structures	3000	x387
297D	Color the Carpet constructive algorithms	2500	x597
297C	Splitting the Uniqueness constructive algorithms	2400	x974
297B	Fish Weight constructive algorithms, greedy	1600	x3571
297A	Parity Game constructive algorithms	1700	x3684
296B	Yaroslav and Two Strings combinatorics, dp	2000	x2372
296A	Yaroslav and Permutations greedy, math	1100	x24018
295E	Yaroslav and Points data structures	2500	x716
295D	Greg and Caves combinatorics, dp	2400	x673