Problemset - Codeforces

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

#	Name
1703F	Yet Another Problem About Pairs Satisfying an Inequality binary search, data structures, dp, greedy, sortings	1300	x21258
1703E	Mirror Grid implementation	1200	x19480
1703D	Double Strings brute force, data structures, strings	1100	x26393
1703C	Cypher brute force, implementation, strings	800	x36774
1703B	ICPC Balloons data structures, implementation	800	x52266
1703A	YES or YES? brute force, implementation, strings	800	x74408
1702G2	Passable Paths (hard version) data structures, dfs and similar, trees	2000	x4816
1702G1	Passable Paths (easy version) dfs and similar, trees	1900	x5593
1702F	Equate Multisets constructive algorithms, data structures, greedy, math, number theory	1700	x8589
1702E	Split Into Two Sets dfs and similar, dsu, graphs	1600	x13921
1702D	Not a Cheap String greedy	1000	x24101
1702C	Train and Queries data structures, greedy	1100	x22830
1702B	Polycarp Writes a String from Memory greedy	800	x27912
1702A	Round Down the Price constructive algorithms	800	x35492
1701F	Points combinatorics, data structures, implementation, math, matrices	2500	x963
1701E	Text Editor brute force, dp, greedy, strings	2500	x1162
1701D	Permutation Restoration binary search, data structures, greedy, math, sortings, two pointers	1900	x5776
1701C	Schedule Management binary search, greedy, implementation, two pointers	1400	x17855
1701B	Permutation greedy	800	x20316
1701A	Grass Field implementation	800	x26555
1700F	Puzzle constructive algorithms, dp, greedy	2600	x958
1700E	Serega the Pirate brute force, constructive algorithms	2600	x888
1700D	River Locks binary search, dp, greedy, math	1900	x6222
1700C	Helping the Nature constructive algorithms, data structures, greedy	1700	x11153
1700B	Palindromic Numbers constructive algorithms, implementation, math	1100	x19009
1700A	Optimal Path constructive algorithms, greedy, math	800	x23083
1699E	Three Days Grace data structures, dp, greedy, math, number theory, two pointers	2600	x1237
1699D	Almost Triple Deletions data structures, dp, greedy	2300	x3202
1699C	The Third Problem combinatorics, constructive algorithms, math	1700	x9965
1699B	Almost Ternary Matrix bitmasks, constructive algorithms, matrices	900	x20093
1699A	The Third Three Number Problem constructive algorithms, math	800	x24182
1698G	Long Binary String bitmasks, math, matrices, meet-in-the-middle, number theory	2900	x326
1698F	Equal Reversal constructive algorithms, graphs, implementation, math	2800	x663
1698E	PermutationForces II brute force, combinatorics, greedy, sortings, trees, two pointers	2300	x1670
1698D	Fixed Point Guessing binary search, constructive algorithms, interactive	1600	x9828
1698C	3SUM Closure brute force, data structures	1300	x18781
1698B	Rising Sand constructive algorithms, greedy, implementation	800	x21041
1698A	XOR Mixup bitmasks, brute force	800	x29774
1697F	Too Many Constraints 2-sat, constructive algorithms, graphs, implementation	2800	x577
1697E	Coloring brute force, combinatorics, constructive algorithms, dp, geometry, graphs, greedy, implementation, math	2400	x1256
1697D	Guess The String binary search, constructive algorithms, interactive	1900	x4553
1697C	awoo's Favorite Problem binary search, constructive algorithms, data structures, greedy, implementation, strings, two pointers	1400	x14686
1697B	Promo greedy, sortings	900	x27294
1697A	Parkway Walk greedy, implementation	800	x25899
1696H	Maximum Product? brute force, combinatorics, dp, greedy, implementation, math, two pointers	3500	x166
1696G	Fishingprince Plays With Array Again brute force, data structures, geometry, math	3300	x281
1696F	Tree Recovery brute force, constructive algorithms, dfs and similar, dsu, graphs, trees	2600	x993
1696E	Placing Jinas combinatorics, math	2000	x4194
1696D	Permutation Graph binary search, constructive algorithms, data structures, divide and conquer, greedy, shortest paths	1900	x5565
1696C	Fishingprince Plays With Array constructive algorithms, greedy, implementation, math	1400	x11860
1696B	NIT Destroys the Universe greedy	900	x22875
1696A	NIT orz! bitmasks, greedy	800	x19044
1695E	Ambiguous Dominoes constructive algorithms, dfs and similar, graphs	2700	x454
1695D2	Tree Queries (Hard Version) constructive algorithms, dfs and similar, dp, greedy, trees	2300	x2059
1695D1	Tree Queries (Easy Version) brute force, constructive algorithms, dfs and similar, dp, greedy, trees	2200	x2226
1695C	Zero Path brute force, data structures, dp, graphs, greedy, shortest paths	1700	x11236
1695B	Circle Game games, greedy	1000	x18767
1695A	Subrectangle Guess games	800	x16442
1694B	Paranoid String constructive algorithms, greedy	1200	x19469
1694A	Creep greedy, implementation	800	x22908
1693F	I Might Be Wrong binary search, greedy, two pointers	3400	x427
1693E	Outermost Maximums data structures, greedy	3400	x438
1693D	Decinc Dividing brute force, data structures, divide and conquer, dp, greedy	2800	x956
1693C	Keshi in Search of AmShZ graphs, greedy, shortest paths	2300	x2700
1693B	Fake Plastic Trees dfs and similar, dp, greedy, trees	1700	x8718
1693A	Directional Increase greedy	1300	x16457
1692H	Gambling data structures, dp, greedy, math	1700	x7710
1692G	2^Sort data structures, dp, sortings, two pointers	1400	x18921
1692F	3SUM brute force, math	1300	x23650
1692E	Binary Deque binary search, implementation, two pointers	1200	x23502
1692D	The Clock brute force, implementation	1100	x19927
1692C	Where's the Bishop? implementation	800	x35288
1692B	All Distinct greedy, sortings	800	x35316
1692A	Marathon implementation	800	x68883
1691F	K-Set Tree combinatorics, dfs and similar, dp, math, trees	2500	x1008
1691E	Number of Groups data structures, dfs and similar, dsu, graphs, greedy, sortings	2300	x1879
1691D	Max GEQ Sum binary search, constructive algorithms, data structures, divide and conquer, implementation, two pointers	1800	x5965
1691C	Sum of Substrings brute force, constructive algorithms, greedy, math, strings	1400	x15997
1691B	Shoe Shuffling constructive algorithms, greedy, implementation, two pointers	1000	x24361
1691A	Beat The Odds brute force, greedy, math	800	x30863
1690G	Count the Trains binary search, data structures, greedy, sortings	2000	x3498
1690F	Shifting String graphs, math, number theory, strings	1700	x7339
1690E	Price Maximization binary search, greedy, math, two pointers	1500	x15563
1690D	Black and White Stripe implementation, two pointers	1000	x31722
1690C	Restoring the Duration of Tasks data structures, greedy, implementation	800	x26487
1690B	Array Decrements greedy, implementation	800	x25858
1690A	Print a Pedestal (Codeforces logo?) constructive algorithms, greedy	800	x34023
1689E	ANDfinity bitmasks, brute force, constructive algorithms, dfs and similar, dsu, graphs	2500	x1244
1689D	Lena and Matrix data structures, dp, geometry, shortest paths	1900	x4289
1689C	Infected Tree dfs and similar, dp, trees	1600	x11576
1689B	Mystic Permutation data structures, greedy	900	x17849
1689A	Lex String brute force, greedy, implementation, sortings, two pointers	800	x16900
1688C	Manipulating History constructive algorithms, greedy, strings	1700	x8293
1688B	Patchouli's Magical Talisman bitmasks, constructive algorithms, greedy, sortings	800	x18424
1688A	Cirno's Perfect Bitmasks Classroom bitmasks, brute force	800	x21974
1687F	Koishi's Unconscious Permutation fft, math	3500	x87
1687E	Become Big For Me combinatorics, constructive algorithms, greedy, math, number theory	3500	x235
1687D	Cute number binary search, brute force, data structures, dsu, implementation, math	2900	x619
1687C	Sanae and Giant Robot binary search, brute force, data structures, dsu, greedy, sortings	2500	x1496
1687B	Railway System constructive algorithms, graphs, greedy, interactive, sortings	1700	x3737