Problemset - Codeforces

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Codeforces Round 940 (Div. 2)
3 days
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Problems

#	Name
1824C	LuoTianyi and XOR-Tree data structures, dfs and similar, dp, dsu, greedy, trees	2500	x1232
1845E	Boxes and Balls dp, implementation, math	2500	x1252
804D	Expected diameter of a tree binary search, brute force, dfs and similar, dp, sortings, trees	2500	x1254
1120D	Power Tree dfs and similar, dp, dsu, graphs, greedy, trees	2500	x1255
757E	Bash Plays with Functions brute force, combinatorics, dp, number theory	2500	x1263
1710C	XOR Triangle bitmasks, brute force, constructive algorithms, dp, greedy, math	2500	x1265
1562E	Rescue Niwen! dp, greedy, string suffix structures, strings	2500	x1323
1467E	Distinctive Roots in a Tree data structures, dfs and similar, dp, trees	2500	x1328
1838E	Count Supersequences combinatorics, dp, math	2500	x1344
1174E	Ehab and the Expected GCD Problem combinatorics, dp, math, number theory	2500	x1344
543C	Remembering Strings bitmasks, dp	2500	x1345
95E	Lucky Country dp, dsu, graphs	2500	x1379
1854C	Expected Destruction combinatorics, dp, math, probabilities	2500	x1381
416E	President's Path dp, graphs, shortest paths	2500	x1386
1041F	Ray in the tube data structures, divide and conquer, dp, math	2500	x1435
1550E	Stringforces binary search, bitmasks, brute force, dp, strings, two pointers	2500	x1436
1497D	Genius bitmasks, dp, graphs, number theory	2500	x1478
1452E	Two Editorials brute force, dp, greedy, sortings, two pointers	2500	x1479
348D	Turtles dp, matrices	2500	x1552
1497E2	Square-free division (hard version) data structures, dp, greedy, math, number theory, two pointers	2500	x1555
704B	Ant Man dp, graphs, greedy	2500	x1555
1407E	Egor in the Republic of Dagestan constructive algorithms, dfs and similar, dp, graphs, greedy, shortest paths	2500	x1597
1327F	AND Segments bitmasks, combinatorics, data structures, dp, two pointers	2500	x1599
840C	On the Bench combinatorics, dp	2500	x1630
1859E	Maximum Monogonosity brute force, dp, math	2500	x1649
1637F	Towers constructive algorithms, dfs and similar, dp, greedy, trees	2500	x1688
1188C	Array Beauty dp	2500	x1699
1548C	The Three Little Pigs combinatorics, dp, fft, math	2500	x1732
1521D	Nastia Plays with a Tree constructive algorithms, data structures, dfs and similar, dp, dsu, greedy, implementation, trees	2500	x1793
1209E2	Rotate Columns (hard version) bitmasks, dp, greedy, sortings	2500	x1844
1481E	Sorting Books data structures, dp, greedy	2500	x1993
1527E	Partition Game binary search, data structures, divide and conquer, dp	2500	x2066
1043F	Make It One bitmasks, combinatorics, dp, math, number theory, shortest paths	2500	x2164
868F	Yet Another Minimization Problem divide and conquer, dp	2500	x3387
55D	Beautiful numbers dp, number theory	2500	x3581
38H	The Great Marathon dp	2400	x262
802L	Send the Fool Further! (hard) dfs and similar, dp, math, trees	2400	x276
175D	Plane of Tanks: Duel brute force, dp, math, probabilities	2400	x288
332E	Binary Key dp, greedy, implementation	2400	x293
335D	Rectangles and Square brute force, dp	2400	x303
58E	Expression dp	2400	x345
107C	Arrangement bitmasks, dp	2400	x360
331C2	The Great Julya Calendar dp	2400	x361
856D	Masha and Cactus dp, trees	2400	x366
273D	Dima and Figure dp	2400	x383
204D	Little Elephant and Retro Strings dp	2400	x390
593E	Strange Calculation and Cats dp, matrices	2400	x397
107D	Crime Management dp, graphs, matrices	2400	x398
534F	Simplified Nonogram bitmasks, dp, hashing, meet-in-the-middle	2400	x435
354B	Game with Strings bitmasks, dp, games	2400	x447
283D	Cows and Cool Sequences dp, math, number theory	2400	x518
856C	Eleventh Birthday combinatorics, dp, math	2400	x521
316D3	PE Lesson dp, math	2400	x525
946F	Fibonacci String Subsequences combinatorics, dp, matrices	2400	x527
567F	Mausoleum dp	2400	x556
665F	Four Divisors data structures, dp, math, number theory, sortings, two pointers	2400	x574
28D	Don't fear, DravDe is kind binary search, data structures, dp, hashing	2400	x580
979E	Kuro and Topological Parity dp	2400	x583
922F	Divisibility constructive algorithms, dp, greedy, number theory	2400	x614
796E	Exam Cheating binary search, dp	2400	x617
513G2	Inversions problem dp, probabilities	2400	x623
295D	Greg and Caves combinatorics, dp	2400	x633
853D	Michael and Charging Stations binary search, dp, greedy	2400	x651
441E	Valera and Number bitmasks, dp, math, probabilities	2400	x666
1866M	Mighty Rock Tower brute force, combinatorics, dp, math, probabilities	2400	x682
920D	Tanks dp, greedy, implementation	2400	x682
1423J	Bubble Cup hypothesis bitmasks, constructive algorithms, dp, math	2400	x726
822E	Liar binary search, dp, hashing, string suffix structures	2400	x738
913E	Logical Expression bitmasks, dp, shortest paths	2400	x741
1809E	Two Tanks binary search, dp, implementation, math	2400	x785
1182D	Complete Mirror constructive algorithms, dfs and similar, dp, hashing, implementation, trees	2400	x798
983C	Elevator dp, graphs, shortest paths	2400	x800
865C	Gotta Go Fast binary search, dp	2400	x808
83D	Numbers dp, math, number theory	2400	x814
1905E	One-X combinatorics, dfs and similar, dp, math, trees	2400	x826
1263F	Economic Difficulties data structures, dfs and similar, dp, flows, graphs, trees	2400	x831
581F	Zublicanes and Mumocrates dp, trees, two pointers	2400	x839
1620G	Subsequences Galore bitmasks, combinatorics, dp	2400	x850
939F	Cutlet data structures, dp	2400	x864
990F	Flow Control dfs and similar, dp, greedy, trees	2400	x868
1032F	Vasya and Maximum Matching dp, trees	2400	x890
1129C	Morse Code binary search, data structures, dp, hashing, sortings, string suffix structures, strings	2400	x895
1099F	Cookies binary search, data structures, dfs and similar, dp, games, trees	2400	x904
1670F	Jee, You See? bitmasks, combinatorics, dp	2400	x912
1784D	Wooden Spoon combinatorics, dp	2400	x942
1132G	Greedy Subsequences data structures, dp, trees	2400	x944
1038E	Maximum Matching bitmasks, brute force, dfs and similar, dp, graphs	2400	x950
1930E	2..3...4.... Wonderful! Wonderful! combinatorics, dp, math	2400	x961
1194F	Crossword Expert combinatorics, dp, number theory, probabilities, two pointers	2400	x962
1093F	Vasya and Array dp	2400	x969
886E	Maximum Element combinatorics, dp, math	2400	x971
756D	Bacterial Melee brute force, combinatorics, dp, string suffix structures	2400	x972
1107G	Vasya and Maximum Profit binary search, constructive algorithms, data structures, dp, dsu	2400	x983
1794E	Labeling the Tree with Distances data structures, dp, greedy, hashing, implementation, trees	2400	x997
744C	Hongcow Buys a Deck of Cards bitmasks, brute force, dp	2400	x997
1004E	Sonya and Ice Cream binary search, data structures, dp, greedy, shortest paths, trees	2400	x1006
31E	TV Game dp	2400	x1008
780F	Axel and Marston in Bitland bitmasks, dp, graphs, matrices	2400	x1017
641D	Little Artem and Random Variable dp, implementation, math, probabilities	2400	x1044
1874B	Jellyfish and Math bitmasks, brute force, dfs and similar, dp, graphs, shortest paths	2400	x1046