Problemset - Codeforces

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Codeforces Round 987 (Div. 2)
00:07:39

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Problems

#	Name
470F	Pairwise Sums *special problem	2300	x106
470E	Chessboard *special problem	1900	x198
470D	Caesar Cipher *special problem	1900	x153
470C	Eval *special problem	1900	x255
470B	Hexakosioihexekontahexaphobia *special problem	1800	x260
470A	Crystal Ball Sequence *special problem, implementation	1400	x677
469B	Chat Online implementation	1300	x12698
469A	I Wanna Be the Guy greedy, implementation	800	x98891
468E	Permanent dp, graph matchings, math, meet-in-the-middle	3100	x323
468D	Tree graph matchings	3100	x367
468C	Hack it! binary search, constructive algorithms, math	2500	x2420
468B	Two Sets 2-sat, dfs and similar, dsu, graph matchings, greedy	2000	x4247
468A	24 Game constructive algorithms, greedy, math	1500	x8005
467E	Alex and Complicated Task data structures, dp, greedy	2300	x788
467D	Fedor and Essay dfs and similar, dp, graphs, hashing, strings	2400	x1859
467C	George and Job dp, implementation	1700	x14768
467B	Fedor and New Game bitmasks, brute force, constructive algorithms, implementation	1100	x37887
467A	George and Accommodation implementation	800	x123902
466E	Information Graph dfs and similar, dsu, graphs, trees	2100	x2239
466D	Increase Sequence combinatorics, dp	2100	x3229
466C	Number of Ways binary search, brute force, data structures, dp, two pointers	1700	x36474
466B	Wonder Room brute force, math	2000	x4925
466A	Cheap Travel implementation	1200	x64126
465B	Inbox (100500) implementation	1000	x10447
465A	inc ARG implementation	900	x10070
464E	The Classic Problem data structures, graphs, shortest paths	3000	x1502
464D	World of Darkraft - 2 dp, probabilities	2700	x670
464C	Substitutes in Number dp	2100	x1853
464B	Restore Cube brute force, geometry	2000	x1712
464A	No to Palindromes! greedy, strings	1700	x5920
463E	Caisa and Tree brute force, dfs and similar, math, number theory, trees	2100	x1606
463D	Gargari and Permutations dfs and similar, dp, graphs, implementation	1900	x6556
463C	Gargari and Bishops greedy, hashing, implementation	1900	x8762
463B	Caisa and Pylons brute force, implementation, math	1100	x27436
463A	Caisa and Sugar brute force, implementation	1200	x9269
462B	Appleman and Card Game greedy	1300	x14516
462A	Appleman and Easy Task brute force, implementation	1000	x16922
461E	Appleman and a Game binary search, shortest paths, strings	3000	x400
461D	Appleman and Complicated Task dsu, math	2800	x366
461C	Appleman and a Sheet of Paper data structures, implementation	2200	x1336
461B	Appleman and Tree dfs and similar, dp, trees	2000	x5706
461A	Appleman and Toastman greedy, sortings	1200	x15554
460E	Roland and Rose brute force, geometry, math, sortings	2700	x343
460D	Little Victor and Set brute force, constructive algorithms, math	2300	x1000
460C	Present binary search, data structures, greedy	1700	x6245
460B	Little Dima and Equation brute force, implementation, math, number theory	1500	x12418
460A	Vasya and Socks brute force, implementation, math	900	x46381
459E	Pashmak and Graph dp, sortings	1900	x5538
459D	Pashmak and Parmida's problem data structures, divide and conquer, sortings	1800	x10244
459C	Pashmak and Buses combinatorics, constructive algorithms, math	1900	x6191
459B	Pashmak and Flowers combinatorics, implementation, sortings	1300	x40675
459A	Pashmak and Garden implementation	1200	x33098
457F	An easy problem about trees dp, games, greedy, trees	3200	x107
457E	Flow Optimality constructive algorithms, flows, math	3000	x96
457D	Bingo! combinatorics, math, probabilities	2700	x281
457C	Elections brute force	2100	x881
457B	Distributed Join greedy	1900	x1135
457A	Golden System math, meet-in-the-middle	1700	x1284
456B	Fedya and Maths math, number theory	1200	x16813
456A	Laptops sortings	1100	x48639
455E	Function data structures	2900	x682
455D	Serega and Fun data structures	2700	x3028
455C	Civilization dfs and similar, dp, dsu, ternary search, trees	2100	x5767
455B	A Lot of Games dfs and similar, dp, games, implementation, strings, trees	1900	x6013
455A	Boredom dp	1500	x59275
454B	Little Pony and Sort by Shift implementation	1200	x18236
454A	Little Pony and Crystal Mine implementation	800	x14891
453E	Little Pony and Lord Tirek data structures	3100	x736
453D	Little Pony and Elements of Harmony dp, matrices	3000	x471
453C	Little Pony and Summer Sun Celebration constructive algorithms, dfs and similar, graphs	2200	x1639
453B	Little Pony and Harmony Chest bitmasks, brute force, dp	2000	x4744
453A	Little Pony and Expected Maximum probabilities	1600	x10649
452F	Permutation data structures, divide and conquer, hashing	2700	x1520
452E	Three strings data structures, dsu, string suffix structures, strings	2400	x1067
452D	Washer, Dryer, Folder greedy, implementation	1900	x1522
452C	Magic Trick combinatorics, math, probabilities	2100	x1630
452B	4-point polyline brute force, constructive algorithms, geometry, trees	1800	x2001
452A	Eevee brute force, implementation, strings	1000	x8023
451E	Devu and Flowers bitmasks, combinatorics, number theory	2300	x3655
451D	Count Good Substrings math	2000	x4777
451C	Predict Outcome of the Game brute force, implementation, math	1700	x3387
451B	Sort the Array implementation, sortings	1300	x45793
451A	Game With Sticks implementation	900	x66207
450B	Jzzhu and Sequences implementation, math	1300	x26459
450A	Jzzhu and Children implementation	1000	x35008
449E	Jzzhu and Squares dp, math, number theory	2900	x285
449D	Jzzhu and Numbers bitmasks, combinatorics, dp	2400	x4522
449C	Jzzhu and Apples constructive algorithms, number theory	2500	x2278
449B	Jzzhu and Cities graphs, greedy, shortest paths	2000	x8700
449A	Jzzhu and Chocolate greedy, math	1700	x3951
448E	Divisors brute force, dfs and similar, implementation, number theory	2200	x1543
448D	Multiplication Table binary search, brute force	1800	x14224
448C	Painting Fence divide and conquer, dp, greedy	1900	x8279
448B	Suffix Structures implementation, strings	1400	x16164
448A	Rewards implementation	800	x24398
447B	DZY Loves Strings greedy, implementation	1000	x20327
447A	DZY Loves Hash implementation	800	x9613
446E	DZY Loves Bridges math, matrices	3100	x134
446D	DZY Loves Games math, matrices, probabilities	2800	x395
446C	DZY Loves Fibonacci Numbers data structures, math, number theory	2400	x3368