Problemset - Codeforces

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Educational Codeforces Round 81 (Rated for Div. 2)
33:01:22
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Problems

#	Name
1286D	LCC data structures, math, matrices, probabilities	2900	x145
1279D	Santa's Bot combinatorics, math, probabilities	1700	x2797
1278F	Cards combinatorics, dp, math, number theory, probabilities	2600	x393
1265E	Beautiful Mirrors data structures, dp, math, probabilities	2100	x1251
1264D2	Beautiful Bracket Sequence (hard version) combinatorics, probabilities	3000	x166
1264D1	Beautiful Bracket Sequence (easy version) combinatorics, dp, probabilities	2600	x445
1264C	Beautiful Mirrors with queries data structures, probabilities	2400	x632
1267G	Game Relics math, probabilities	3100	x98
1254D	Tree Queries data structures, probabilities, trees	2600	x375
1245E	Hyakugoku and Ladders dp, probabilities, shortest paths	2300	x725
1236F	Alice and the Cactus dfs and similar, graphs, math, probabilities	2900	x54
1210F2	Marek and Matching (hard version) brute force, probabilities	3100	x60
1210F1	Marek and Matching (easy version) brute force, probabilities	2900	x81
1198F	GCD Groups 2 greedy, number theory, probabilities	2900	x277
1194F	Crossword Expert combinatorics, dp, number theory, probabilities, two pointers	2500	x444
1190F	Tokitsukaze and Powers number theory, probabilities	3300	x35
1187F	Expected Square Beauty dp, math, probabilities	2600	x358
1172C2	Nauuo and Pictures (hard version) dp, probabilities	2700	x367
1172C1	Nauuo and Pictures (easy version) dp, probabilities	2500	x573
1148G	Gold Experience constructive algorithms, graphs, math, number theory, probabilities	3100	x82
1156F	Card Bag dp, math, probabilities	2500	x548
1151F	Sonya and Informatics combinatorics, dp, matrices, probabilities	2500	x540
1153F	Serval and Bonus Problem combinatorics, dp, math, probabilities	2800	x346
1139D	Steps to One dp, math, number theory, probabilities	2300	x832
1114E	Arithmetic Progression binary search, interactive, number theory, probabilities	2100	x1732
1097D	Makoto and a Blackboard dp, math, number theory, probabilities	2200	x1689
1096F	Inversion Expectation dp, math, probabilities	2300	x853
1096E	The Top Scorer combinatorics, dp, math, probabilities	2600	x323
1081G	Mergesort Strikes Back math, probabilities	3000	x88
1061F	Lost Root interactive, probabilities	2400	x342
1067D	Computer Game dp, greedy, math, probabilities	2800	x94
1045D	Interstellar battle math, probabilities, trees	2600	x332
1042E	Vasya and Magic Matrix dp, math, probabilities	2300	x784
1039B	Subway Pursuit binary search, interactive, probabilities	2100	x1452
1009E	Intercity Travelling combinatorics, math, probabilities	1900	x1785
989E	A Trance of Nightfall dp, geometry, matrices, probabilities	2900	x153
960E	Alternating Tree combinatorics, dfs and similar, divide and conquer, dp, probabilities, trees	2200	x794
952D	I'm Feeling Lucky! probabilities	2000	x1724
949F	Astronomy geometry, probabilities	3200	x29
930B	Game with String implementation, probabilities, strings	1800	x1825
935D	Fafa and Ancient Alphabet math, probabilities	1900	x1741
913H	Don't Exceed math, probabilities	3400	x58
913F	Strongly Connected Tournament dp, graphs, math, probabilities	2700	x297
912D	Fishes data structures, graphs, greedy, probabilities, shortest paths	2100	x1280
908D	New Year and Arbitrary Arrangement dp, math, probabilities	2200	x1360
896C	Willem, Chtholly and Seniorious data structures, probabilities	2700	x724
895E	Eyes Closed data structures, probabilities	2500	x466
870D	Something with XOR Queries brute force, interactive, probabilities	2100	x856
859D	Third Month Insanity dp, probabilities, trees	2100	x638
846F	Random Query data structures, math, probabilities, two pointers	2000	x1038
843B	Interactive LowerBound brute force, interactive, probabilities	2000	x1445
840D	Destiny data structures, probabilities	2400	x719
839C	Journey dfs and similar, dp, graphs, probabilities, trees	1500	x7112
802F	Marmots (hard) math, probabilities	2800	x80
768F	Barrels and boxes brute force, combinatorics, math, number theory, probabilities	2300	x666
768D	Jon and Orbs dp, math, probabilities	2100	x1477
749E	Inversions After Shuffle data structures, probabilities	2600	x512
739E	Gosha is hunting brute force, data structures, dp, flows, math, probabilities, sortings	2900	x634
717H	Pokermon League challenge math, probabilities	2400	x304
717D	Dexterina’s Lab games, matrices, probabilities	1900	x909
712E	Memory and Casinos data structures, math, probabilities	2700	x380
711E	ZS and The Birthday Paradox math, number theory, probabilities	2400	x1004
698C	LRU bitmasks, dp, math, probabilities	2700	x820
696B	Puzzles dfs and similar, math, probabilities, trees	1800	x2403
678E	Another Sith Tournament bitmasks, dp, math, probabilities	2200	x1004
679D	Bear and Chase brute force, dfs and similar, graphs, implementation, math, probabilities	2900	x221
643E	Bear and Destroying Subtrees dp, math, probabilities, trees	2600	x303
641D	Little Artem and Random Variable dp, implementation, math, probabilities	2300	x696
662A	Gambling Nim bitmasks, math, matrices, probabilities	2400	x219
633E	Startup Funding binary search, constructive algorithms, data structures, probabilities, two pointers	2400	x446
629E	Famil Door and Roads combinatorics, data structures, dfs and similar, dp, probabilities, trees	2400	x570
626D	Jerry's Protest brute force, combinatorics, dp, probabilities	1800	x2002
623D	Birthday greedy, math, probabilities	2600	x286
621C	Wet Shark and Flowers combinatorics, math, number theory, probabilities	1700	x3429
618G	Combining Slimes dp, math, matrices, probabilities	3300	x84
605E	Intergalaxy Trips probabilities, shortest paths	2600	x436
601C	Kleofáš and the n-thlon dp, math, probabilities	2400	x882
596D	Wilbur and Trees dp, math, probabilities, sortings	2500	x545
559D	Randomizer combinatorics, geometry, probabilities	2800	x264
553E	Kyoya and Train dp, fft, graphs, math, probabilities	3300	x232
540D	Bad Luck Island dp, probabilities	2100	x2940
518D	Ilya and Escalator combinatorics, dp, math, probabilities	1900	x3851
513G2	Inversions problem dp, probabilities	2400	x421
513C	Second price auction bitmasks, probabilities	2000	x1251
498B	Name That Tune dp, probabilities, two pointers	2500	x852
494C	Helping People dp, probabilities	2900	x409
482C	Game with Strings bitmasks, dp, probabilities	2800	x536
476B	Dreamoon and WiFi bitmasks, brute force, combinatorics, dp, math, probabilities	1300	x12208
464D	World of Darkraft - 2 dp, probabilities	2600	x369
457D	Bingo! combinatorics, math, probabilities	2700	x146
453A	Little Pony and Expected Maximum probabilities	1600	x5633
452C	Magic Trick combinatorics, math, probabilities	2100	x1060
446D	DZY Loves Games math, matrices, probabilities	2800	x179
444B	DZY Loves FFT probabilities	2400	x774
442B	Andrey and Problem greedy, math, probabilities	1800	x3379
441E	Valera and Number bitmasks, dp, math, probabilities	2700	x298
424E	Colored Jenga dfs and similar, dp, probabilities	2500	x73
417E	Square Table constructive algorithms, math, probabilities	2400	x569
398B	Painting The Wall dp, probabilities		x666
364D	Ghd brute force, math, probabilities	2600	x713

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