Problemset - Codeforces

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Codeforces Round (Div. 2)
6 days

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Problems

#	Name
808E	Selling Souvenirs binary search, dp, greedy, ternary search	2300	x1773
804F	Fake bullions combinatorics, dfs and similar, dp, graphs, number theory	3400	x143
804D	Expected diameter of a tree binary search, brute force, dfs and similar, dp, sortings, trees	2500	x1263
803E	Roma and Poker dp, graphs	2000	x2119
802L	Send the Fool Further! (hard) dfs and similar, dp, math, trees	2400	x291
802K	Send the Fool Further! (medium) dp, trees	2100	x607
799D	Field expansion brute force, dp, meet-in-the-middle	2100	x1987
797F	Mice and Holes data structures, dp, greedy, sortings	2600	x1128
797E	Array Queries brute force, data structures, dp	2000	x4151
796E	Exam Cheating binary search, dp	2400	x639
796D	Police Stations constructive algorithms, dfs and similar, dp, graphs, shortest paths, trees	2100	x5303
794G	Replace All combinatorics, dp, math	3400	x328
793F	Julia the snail data structures, divide and conquer, dp	3000	x524
793E	Problem of offices constructive algorithms, dfs and similar, dp, trees	2900	x245
793D	Presents in Bankopolis dp, graphs, shortest paths	2100	x1586
792C	Divide by Three dp, greedy, math, number theory	2000	x4278
786A	Berzerk dfs and similar, dp, games	2000	x2367
785D	Anton and School - 2 combinatorics, dp, math, number theory	2300	x2709
780G	Andryusha and Nervous Barriers data structures, dp	2700	x652
780F	Axel and Marston in Bitland bitmasks, dp, graphs, matrices	2400	x1030
778E	Selling Numbers dp, sortings	3000	x303
777E	Hanoi Factory brute force, data structures, dp, greedy, sortings	2000	x3918
776G	Sherlock and the Encrypted Data bitmasks, combinatorics, dp	2900	x334
774J	Stepan's Series *special problem, dp	2000	x355
774I	Composing Of String *special problem, dp	2300	x101
773F	Test Data Generation combinatorics, divide and conquer, dp, fft, math, number theory	3400	x185
773D	Perishable Roads dp, graphs, shortest paths	2700	x580
772D	Varying Kibibits bitmasks, dp	2700	x574
772C	Vulnerable Kerbals constructive algorithms, dp, graphs, math, number theory	2300	x1211
771E	Bear and Rectangle Strips dp, greedy	3000	x444
771D	Bear and Company dp	2500	x1114
771C	Bear and Tree Jumps dfs and similar, dp, trees	2100	x2834
768E	Game of Stones bitmasks, dp, games	2100	x2712
768D	Jon and Orbs dp, math, probabilities	2200	x2798
766E	Mahmoud and a xor trip bitmasks, constructive algorithms, data structures, dfs and similar, dp, math, trees	2100	x2893
766D	Mahmoud and a Dictionary data structures, dfs and similar, dp, dsu, graphs	2000	x3292
765G	Math, math everywhere brute force, dp, math, meet-in-the-middle, number theory	3200	x83
765E	Tree Folding dfs and similar, dp, greedy, implementation, trees	2200	x1254
762D	Maximum path dp, greedy, implementation	2300	x1351
761F	Dasha and Photos brute force, data structures, dp, implementation	2600	x408
758E	Broken Tree dfs and similar, dp, graphs, greedy, trees	2600	x445
758D	Ability To Convert constructive algorithms, dp, greedy, math, strings	2000	x2692
757E	Bash Plays with Functions brute force, combinatorics, dp, number theory	2500	x1275
757D	Felicity's Big Secret Revealed bitmasks, dp	2200	x1279
756E	Byteland coins combinatorics, dp, math	3200	x158
756D	Bacterial Melee brute force, combinatorics, dp, string suffix structures	2400	x984
755G	PolandBall and Many Other Balls combinatorics, divide and conquer, dp, fft, math, number theory	3200	x888
755F	PolandBall and Gifts bitmasks, dp, greedy	2600	x1290
754C	Vladik and chat brute force, constructive algorithms, dp, implementation, strings	2200	x916
750G	New Year and Binary Tree Paths bitmasks, brute force, combinatorics, dp	3200	x444
750E	New Year and Old Subsequence data structures, divide and conquer, dp, matrices	2600	x1473
747F	Igor and Interesting Numbers brute force, combinatorics, dp, math	2500	x415
744C	Hongcow Buys a Deck of Cards bitmasks, brute force, dp	2400	x1021
743E	Vladik and cards binary search, bitmasks, brute force, dp	2200	x1484
739E	Gosha is hunting brute force, data structures, dp, flows, math, probabilities, sortings	3000	x2088
735E	Ostap and Tree dp, trees	2500	x853
734E	Anton and Tree dfs and similar, dp, trees	2100	x3876
731E	Funny Game dp, games	2200	x1449
730I	Olympiad in Programming and Sports dp, flows, graphs, greedy	2000	x1976
729F	Financiers Game dp	2500	x938
727F	Polycarp's problems binary search, dp, greedy	2300	x771
724F	Uniformly Branched Trees combinatorics, dp, trees	2700	x393
724E	Goods transportation dp, flows, greedy	2900	x1258
722E	Research Rover combinatorics, dp	2900	x805
721E	Road to Home binary search, dp	2700	x303
720D	Slalom data structures, dp, sortings	3100	x226
718D	Andrew and Chemistry dp, hashing, trees	2900	x392
717B	R3D3’s Summer Adventure dp, greedy	2700	x139
713E	Sonya Partymaker binary search, dp	3300	x348
713C	Sonya and Problem Wihtout a Legend dp, sortings	2300	x5025
712D	Memory and Scores combinatorics, dp, math	2200	x1798
710E	Generate a String dfs and similar, dp	2000	x5043
708E	Student's Camp dp, math	3100	x946
708C	Centroids data structures, dfs and similar, dp, graphs, greedy, trees	2300	x3074
704C	Black Widow dp, graphs, implementation, math	2900	x458
704B	Ant Man dp, graphs, greedy	2500	x1604
703E	Mishka and Divisors dp, number theory	2600	x590
698C	LRU bitmasks, dp, math, probabilities	2400	x1284
696D	Legen... data structures, dp, matrices, strings	2500	x1245
696C	PLEASE combinatorics, dp, implementation, math, matrices	2000	x2058
691F	Couple Cover brute force, dp, number theory	2200	x1274
690D3	The Wall (hard) dp	2100	x496
689E	Mike and Geometry Problem combinatorics, data structures, dp, geometry, implementation	2000	x1830
679B	Bear and Tower of Cubes binary search, dp, greedy	2200	x2120
678E	Another Sith Tournament bitmasks, dp, math, probabilities	2200	x1989
677E	Vanya and Balloons binary search, brute force, dp, implementation	2300	x592
677D	Vanya and Treasure data structures, dp, graphs, shortest paths	2300	x1541
675E	Trains and Statistic data structures, dp, greedy	2300	x2641
671D	Roads in Yusland data structures, dp, greedy	2900	x1116
665F	Four Divisors data structures, dp, math, number theory, sortings, two pointers	2400	x587
662E	To Hack or not to Hack brute force, dp, greedy	3100	x134
662C	Binary Table bitmasks, brute force, divide and conquer, dp, fft, math	2600	x1972
659G	Fence Divercity combinatorics, dp, number theory	2300	x1011
650D	Zip-line binary search, data structures, dp, hashing	2600	x1246
650C	Table Compression dfs and similar, dp, dsu, graphs, greedy	2200	x1948
645E	Intellectual Inquiry dp, greedy, strings	2200	x1227
643F	Bears and Juice dp, math, meet-in-the-middle	2900	x695
643E	Bear and Destroying Subtrees dp, math, probabilities, trees	2700	x584
643C	Levels and Regions dp	2400	x1324
641D	Little Artem and Random Variable dp, implementation, math, probabilities	2400	x1058