Problemset - Codeforces

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IAEPC Preliminary Contest (Codeforces Round 999, Div. 1 + Div. 2)
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Problems

#	Name
470D	Caesar Cipher *special problem	1900	x155
470C	Eval *special problem	1900	x258
470B	Hexakosioihexekontahexaphobia *special problem	1800	x262
470A	Crystal Ball Sequence *special problem, implementation	1400	x680
469B	Chat Online implementation	1300	x12814
469A	I Wanna Be the Guy greedy, implementation	800	x101727
468E	Permanent dp, graph matchings, math, meet-in-the-middle	3100	x342
468D	Tree graph matchings	3100	x372
468C	Hack it! binary search, constructive algorithms, math	2500	x2440
468B	Two Sets 2-sat, dfs and similar, dsu, graph matchings, greedy	2000	x4336
468A	24 Game constructive algorithms, greedy, math	1500	x8056
467E	Alex and Complicated Task data structures, dp, greedy	2300	x802
467D	Fedor and Essay dfs and similar, dp, graphs, hashing, strings	2400	x1871
467C	George and Job dp, implementation	1700	x14929
467B	Fedor and New Game bitmasks, brute force, constructive algorithms, implementation	1100	x38502
467A	George and Accommodation implementation	800	x127866
466E	Information Graph dfs and similar, dsu, graphs, trees	2100	x2291
466D	Increase Sequence combinatorics, dp	2100	x3292
466C	Number of Ways binary search, brute force, data structures, dp, two pointers	1700	x37061
466B	Wonder Room brute force, math	2000	x4972
466A	Cheap Travel implementation	1200	x65649
465B	Inbox (100500) implementation	1000	x10482
465A	inc ARG implementation	900	x10108
464E	The Classic Problem data structures, graphs, shortest paths	3000	x1533
464D	World of Darkraft - 2 dp, probabilities	2700	x675
464C	Substitutes in Number dp	2100	x1862
464B	Restore Cube brute force, geometry	2000	x1714
464A	No to Palindromes! greedy, strings	1700	x5941
463E	Caisa and Tree brute force, dfs and similar, math, number theory, trees	2100	x1630
463D	Gargari and Permutations dfs and similar, dp, graphs, implementation	1900	x6637
463C	Gargari and Bishops greedy, hashing, implementation	1900	x8813
463B	Caisa and Pylons brute force, implementation, math	1100	x27832
463A	Caisa and Sugar brute force, implementation	1200	x9300
462B	Appleman and Card Game greedy	1300	x14661
462A	Appleman and Easy Task brute force, implementation	1000	x17039
461E	Appleman and a Game binary search, shortest paths, strings	3000	x455
461D	Appleman and Complicated Task dsu, math	2800	x376
461C	Appleman and a Sheet of Paper data structures, implementation	2200	x1338
461B	Appleman and Tree dfs and similar, dp, trees	2000	x5895
461A	Appleman and Toastman greedy, sortings	1200	x15609
460E	Roland and Rose brute force, geometry, math, sortings	2700	x344
460D	Little Victor and Set brute force, constructive algorithms, math	2300	x1008
460C	Present binary search, data structures, greedy	1700	x6297
460B	Little Dima and Equation brute force, implementation, math, number theory	1500	x12529
460A	Vasya and Socks brute force, implementation, math	900	x47151
459E	Pashmak and Graph dp, sortings	1900	x5582
459D	Pashmak and Parmida's problem data structures, divide and conquer, sortings	1800	x10479
459C	Pashmak and Buses combinatorics, constructive algorithms, math	1900	x6221
459B	Pashmak and Flowers combinatorics, implementation, sortings	1300	x41444
459A	Pashmak and Garden implementation	1200	x33478
457F	An easy problem about trees dp, games, greedy, trees	3200	x109
457E	Flow Optimality constructive algorithms, flows, math	3000	x97
457D	Bingo! combinatorics, math, probabilities	2700	x282
457C	Elections brute force	2100	x890
457B	Distributed Join greedy	1900	x1141
457A	Golden System math, meet-in-the-middle	1700	x1285
456B	Fedya and Maths math, number theory	1200	x17034
456A	Laptops sortings	1100	x49558
455E	Function data structures	2900	x697
455D	Serega and Fun data structures	2700	x3077
455C	Civilization dfs and similar, dp, dsu, ternary search, trees	2100	x5868
455B	A Lot of Games dfs and similar, dp, games, implementation, strings, trees	1900	x6080
455A	Boredom dp	1500	x60721
454B	Little Pony and Sort by Shift implementation	1200	x18327
454A	Little Pony and Crystal Mine implementation	800	x14987
453E	Little Pony and Lord Tirek data structures	3100	x759
453D	Little Pony and Elements of Harmony dp, matrices	3000	x472
453C	Little Pony and Summer Sun Celebration constructive algorithms, dfs and similar, graphs	2200	x1658
453B	Little Pony and Harmony Chest bitmasks, brute force, dp	2000	x4807
453A	Little Pony and Expected Maximum probabilities	1600	x10869
452F	Permutation data structures, divide and conquer, hashing	2700	x1561
452E	Three strings data structures, dsu, string suffix structures, strings	2400	x1073
452D	Washer, Dryer, Folder greedy, implementation	1900	x1531
452C	Magic Trick combinatorics, math, probabilities	2100	x1650
452B	4-point polyline brute force, constructive algorithms, geometry, trees	1800	x2021
452A	Eevee brute force, implementation, strings	1000	x8073
451E	Devu and Flowers bitmasks, combinatorics, number theory	2300	x3745
451D	Count Good Substrings math	2000	x4810
451C	Predict Outcome of the Game brute force, implementation, math	1700	x3404
451B	Sort the Array implementation, sortings	1300	x46676
451A	Game With Sticks implementation	900	x67400
450B	Jzzhu and Sequences implementation, math	1300	x26758
450A	Jzzhu and Children implementation	1000	x35763
449E	Jzzhu and Squares dp, math, number theory	2900	x289
449D	Jzzhu and Numbers bitmasks, combinatorics, dp	2400	x4675
449C	Jzzhu and Apples constructive algorithms, number theory	2500	x2296
449B	Jzzhu and Cities graphs, greedy, shortest paths	2000	x8860
449A	Jzzhu and Chocolate greedy, math	1700	x3963
448E	Divisors brute force, dfs and similar, implementation, number theory	2200	x1551
448D	Multiplication Table binary search, brute force	1800	x14476
448C	Painting Fence divide and conquer, dp, greedy	1900	x8405
448B	Suffix Structures implementation, strings	1400	x16273
448A	Rewards implementation	800	x24647
447B	DZY Loves Strings greedy, implementation	1000	x20403
447A	DZY Loves Hash implementation	800	x9724
446E	DZY Loves Bridges math, matrices	3100	x134
446D	DZY Loves Games math, matrices, probabilities	2800	x420
446C	DZY Loves Fibonacci Numbers data structures, math, number theory	2400	x3433
446B	DZY Loves Modification brute force, data structures, greedy	2000	x3614
446A	DZY Loves Sequences dp, implementation, two pointers	1600	x12714