Problemset - Codeforces

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Codeforces Round 940 (Div. 2) and CodeCraft-23
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Problems

#	Name
1689C	Infected Tree dfs and similar, dp, trees	1600	x10418
1686B	Odd Subarrays dp, greedy	800	x17866
1681F	Unique Occurrences data structures, dfs and similar, divide and conquer, dp, dsu, trees	2300	x1522
1681E	Labyrinth Adventures data structures, dp, matrices, shortest paths	2600	x696
1681D	Required Length brute force, dfs and similar, dp, hashing, shortest paths	1700	x9226
1680E	Moving Chips bitmasks, dp, greedy	2000	x3619
1679F	Formalism for Formalism bitmasks, dp, math	2600	x492
1679E	Typical Party in Dorm bitmasks, combinatorics, dp, strings	2400	x1089
1679D	Toss a Coin to Your Graph... binary search, dfs and similar, dp, graphs	1900	x4542
1678B2	Tokitsukaze and Good 01-String (hard version) dp, greedy, implementation	1800	x6370
1677F	Tokitsukaze and Gems dp, math	3500	x85
1677D	Tokitsukaze and Permutations dp, math	2500	x1186
1677A	Tokitsukaze and Strange Inequality brute force, data structures, dp	1600	x8085
1676G	White-Black Balanced Subtrees dfs and similar, dp, graphs, trees	1300	x14021
1675G	Sorting Pancakes dp	2300	x1591
1675F	Vlad and Unfinished Business dfs and similar, dp, greedy, trees	1800	x4980
1674G	Remove Directed Edges dfs and similar, dp, graphs	2000	x2369
1673C	Palindrome Basis brute force, dp, math, number theory	1500	x11606
1671F	Permutation Counting brute force, combinatorics, dp, fft, math	2700	x313
1671E	Preorder combinatorics, divide and conquer, dp, dsu, hashing, sortings, trees	2100	x2635
1670F	Jee, You See? bitmasks, combinatorics, dp	2400	x912
1667E	Centroid Probabilities combinatorics, dp, fft, math	3000	x617
1667D	Edge Elimination constructive algorithms, dfs and similar, dp, trees	2900	x631
1667B	Optimal Partition data structures, dp	2100	x3458
1666J	Job Lookup constructive algorithms, dp, shortest paths, trees	2100	x1287
1666F	Fancy Stack combinatorics, dp, implementation	2200	x1099
1663D	Is it rated - 3 *special problem, combinatorics, dp, math		x1378
1662L	Il Derby della Madonnina data structures, dp, math		x988
1662G	Gastronomic Event dp, greedy, trees		x443
1662C	European Trip dp, graphs, math, matrices		x288
1661E	Narrow Components brute force, data structures, dp, dsu, math, trees	2500	x908
1661B	Getting Zero bitmasks, brute force, dfs and similar, dp, graphs, greedy, shortest paths	1300	x16898
1660C	Get an Even String dp, greedy, strings	1300	x18666
1659C	Line Empire binary search, brute force, dp, greedy, implementation, math	1500	x9572
1658E	Gojou and Matrix Game data structures, dp, games, hashing, implementation, math, number theory, sortings	2500	x1000
1657E	Star MST combinatorics, dp, graph matchings, math	2200	x1974
1654H	Three Minimums combinatorics, constructive algorithms, divide and conquer, dp, fft, math	3500	x68
1650G	Counting Shortcuts data structures, dfs and similar, dp, graphs, shortest paths	2100	x2322
1650F	Vitaly and Advanced Useless Algorithms dp, greedy, implementation	2200	x1370
1648D	Serious Business data structures, divide and conquer, dp, implementation, shortest paths	2800	x771
1647F	Madoka and Laziness dp, greedy	3100	x375
1647D	Madoka and the Best School in Russia constructive algorithms, dp, math, number theory	1900	x5090
1646E	Power Board brute force, dp, math, number theory	2200	x2287
1646D	Weight the Tree constructive algorithms, dfs and similar, dp, implementation, trees	2000	x3517
1646C	Factorials and Powers of Two bitmasks, brute force, constructive algorithms, dp, math	1500	x13051
1644C	Increase Subarray Sums brute force, dp, greedy, implementation	1400	x13297
1637F	Towers constructive algorithms, dfs and similar, dp, greedy, trees	2500	x1688
1637D	Yet Another Minimization Problem dp, greedy, math	1800	x7335
1637B	MEX and Array brute force, dp, greedy, math	1100	x14589
1635D	Infinite Set bitmasks, dp, math, matrices, number theory, strings	1800	x5972
1633D	Make Them Equal dp, greedy	1600	x12888
1632C	Strange Test binary search, bitmasks, brute force, dp, math	1600	x12197
1631B	Fun with Even Subarrays dp, greedy	1100	x19212
1630D	Flipping Range constructive algorithms, dp, greedy, number theory	2400	x1502
1630C	Paint the Middle dp, greedy, sortings, two pointers	2200	x2816
1628D2	Game on Sum (Hard Version) combinatorics, dp, games, math	2400	x1966
1628D1	Game on Sum (Easy Version) combinatorics, dp, games, math	2100	x3004
1627E	Not Escaping data structures, dp, implementation, shortest paths, two pointers	2200	x2213
1627D	Not Adding brute force, dp, math, number theory	1900	x7788
1626F	A Random Code Problem combinatorics, dp, math, number theory, probabilities	2800	x699
1626C	Monsters And Spells binary search, data structures, dp, greedy, implementation, math, two pointers	1700	x10569
1625E1	Cats on the Upgrade (easy version) brute force, data structures, dfs and similar, divide and conquer, dp, graphs, trees	2500	x970
1625C	Road Optimization dp	1700	x9990
1624E	Masha-forgetful brute force, constructive algorithms, dp, hashing, implementation, strings	2000	x3915
1621G	Weighted Increasing Subsequences data structures, dp, math	3200	x616
1621E	New School binary search, data structures, dp, greedy, implementation, sortings	2300	x1709
1620G	Subsequences Galore bitmasks, combinatorics, dp	2400	x850
1620F	Bipartite Array dp, greedy	2800	x565
1620C	BA-String brute force, dp, greedy, implementation, math	1800	x6330
1619E	MEX and Increments constructive algorithms, data structures, dp, greedy, implementation, math, sortings	1700	x8615
1618D	Array and Operations dp, greedy, math	1300	x18202
1617E	Christmas Chocolates dfs and similar, dp, games, graphs, implementation, math, number theory, shortest paths, trees	2700	x826
1616H	Keep XOR Low bitmasks, combinatorics, data structures, divide and conquer, dp, math	3000	x770
1616G	Just Add an Edge dfs and similar, dp, graphs	3500	x232
1616D	Keep the Average High dp, greedy, math	2000	x4687
1615F	LEGOndary Grandmaster combinatorics, dp, math	2800	x728
1614D2	Divan and Kostomuksha (hard version) dp, number theory	2300	x2166
1614D1	Divan and Kostomuksha (easy version) dp, number theory	2100	x3639
1614C	Divan and bitwise operations bitmasks, combinatorics, constructive algorithms, dp, math	1500	x9888
1613D	MEX Sequences dp, math	1900	x4421
1612F	Armor and Weapons brute force, dp, greedy, shortest paths	2800	x559
1612E	Messages brute force, dp, greedy, probabilities, sortings	2000	x2381
1611E2	Escape The Maze (hard version) dfs and similar, dp, greedy, shortest paths, trees	1900	x3623
1610D	Not Quite Lee combinatorics, dp, math, number theory	2000	x2572
1609E	William The Oblivious bitmasks, data structures, dp, matrices	2400	x1831
1609C	Complex Market Analysis binary search, dp, implementation, number theory, schedules, two pointers	1400	x9447
1608F	MEX counting combinatorics, dp, implementation	3200	x513
1608C	Game Master data structures, dfs and similar, dp, graphs, greedy, two pointers	1700	x6399
1606F	Tree Queries brute force, dp, trees	2800	x509
1606E	Arena combinatorics, dp, math	2100	x3320
1605F	PalindORme combinatorics, dp	2900	x283
1603F	October 18, 2017 combinatorics, dp, implementation, math	2700	x260
1603E	A Perfect Problem combinatorics, dp, math	3200	x393
1603D	Artistic Partition divide and conquer, dp, number theory	3000	x607
1603C	Extreme Extension dp, greedy, math, number theory	2300	x1967
1601E	Phys Ed Online data structures, dp, greedy	2900	x460
1601D	Difficult Mountain data structures, dp, greedy, sortings	2700	x1360
1601C	Optimal Insertion data structures, divide and conquer, dp, greedy, sortings	2300	x1909
1601B	Frog Traveler data structures, dfs and similar, dp, graphs, shortest paths, two pointers	1900	x4741
1598F	RBS binary search, bitmasks, brute force, data structures, dp	2400	x1318