Problemset - Codeforces

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Codeforces Round 1123 (Div. 2)
15:23:57
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Problems

#	Name
2247D2	XOR Sorting (Hard Version) bitmasks, data structures, greedy	2000	x2538
2247D1	XOR Sorting (Easy Version) bitmasks, greedy	1500	x6920
2247C	Inversion of a Subsequence greedy, math	1100	x13422
2247B	Yet Another Constructive constructive algorithms	900	x16471
2247A	Zero Sum constructive algorithms, dp, number theory	800	x22687
2246F	Whoname and Unsorted Array constructive algorithms	2900	x339
2246E	lce4113 and Security Game bitmasks, interactive, interactive, math, probabilities	2600	x700
2246D	diss_quack and Array Game bitmasks, brute force, games, greedy	1900	x3350
2246C	0mar and Alternating Sums combinatorics, dp, math	1400	x9279
2246B	ezraft and Array constructive algorithms, number theory	900	x17621
2246A	farmpiggie and Subset Sum constructive algorithms	800	x19884
2245H	Connect Connect See brute force, brute force, data structures	3500	x107
2245G	NPC Challenge divide and conquer, interactive	3000	x191
2245F	Familiar? brute force, combinatorics, dp	2800	x430
2245E	Tom and Jerry dfs and similar, dsu, games, trees	2300	x1191
2245D2	Construct an Array (Hard Version) 2-sat, constructive algorithms, dfs and similar, graphs, implementation	2000	x2249
2245D1	Construct an Array (Easy Version) dfs and similar, implementation, sortings	1700	x3936
2245C	MEXOR bitmasks, constructive algorithms, math	1400	x7230
2245B	Delete and Concatenate greedy	1100	x11113
2245A	Who Watches the Watchpig? greedy	800	x14221
2244G	Yura and Deadlines data structures, dp	1900	x3021
2244F	Anya Loves Trees! dfs and similar, dp, greedy, trees, trees	1700	x4590
2244E	Masha and the Garland data structures, dp, greedy, implementation, math, number theory, strings	1400	x9272
2244D	Yaroslav and Productivity constructive algorithms, dp, greedy, math, number theory	1200	x13789
2244C	Stepan and Permutation constructive algorithms, dfs and similar, dsu, greedy, math, number theory, sortings, sortings, sortings	1100	x18041
2244B	Nikita and Books greedy, greedy, math, math, sortings, sortings	800	x25219
2244A	Iskander and Drawings dp, games, greedy, strings	800	x30645
2242F	Summer Vacation data structures, data structures, data structures, dp, dp, probabilities, trees	2800	x491
2242E	Product of Closures bitmasks, brute force, constructive algorithms, greedy, implementation, math, number theory	2200	x1617
2242D	Two Digit Strings dp, strings	1600	x8183
2242C	Unstable Elements brute force, brute force, data structures, implementation, sortings, two pointers, two pointers	1300	x11844
2242B	Predominant Frequency Division data structures, greedy, implementation, math	1000	x17996
2242A	Bigrams sortings, strings	800	x25241
2241G	Summmon binary search, data structures, greedy, implementation, math, number theory	2400	x1023
2241F	A Bit Odd data structures, games, greedy, math	1700	x5178
2241E	Fair and Square combinatorics, dp, graphs, math, number theory, trees	1600	x6776
2241D	An Alternative Way dp, greedy, math	1100	x16969
2241C	RemovevomeR greedy	1000	x22224
2241B	Good times Good times constructive algorithms, dfs and similar, math	1100	x21623
2241A	Divide and Conquer greedy, math, number theory	800	x35464
2240B	AI Finds Nothing Here combinatorics, math	1100	x11312
2240A	Another Popcount Problem greedy	800	x17289
2239F	Colorful Works dp, fft, games, implementation	3500	x249
2239E	The end of this world, data structures, divide and conquer, dsu, graphs	3300	x180
2239D	Hunting the Beast combinatorics, dp, graphs, math	2500	x700
2239C	Revival binary search, data structures, math, two pointers	2200	x1548
2239B	Decidophobia greedy, math, sortings, two pointers	1600	x7469
2239A	Nim Game Is XOR Game constructive algorithms, games, greedy, math	1300	x9620
2238F	Infinite Work combinatorics, graphs, greedy, math, trees	2600	x485
2238E	Cake Trial dp, greedy	2100	x2250
2238D	Storming Arasaka greedy, math, number theory	1500	x8067
2238C	Village Guilds dfs and similar, dp, trees	1400	x9687
2238B	Crimson Triples dp, math, number theory	900	x16718
2238A	Another Puzzle from Papyrus greedy, math, sortings	800	x20308
2237I2	DBFS Order (Hard Version) dp, trees	3500	x114
2237I1	DBFS Order (Easy Version) dp, trees	3500	x85
2237H	Slime and Queries data structures, greedy, trees	3500	x156
2237G	Send GCDs communication, constructive algorithms, interactive, math, number theory	2900	x455
2237F	Paint the Array data structures, dp, greedy	2400	x1123
2237E	Permutation Commutation data structures, graphs, greedy	2100	x2159
2237D	Fullmetal Bitchemist constructive algorithms, greedy, math	1600	x6654
2237C	Duck Surplus binary search, greedy	1000	x16554
2237B	Annoying the Ghost brute force, greedy	1000	x15347
2237A	Destroying Towers games, greedy, schedules	800	x22402
2236G	Criterion in Burlandia binary search, bitmasks, brute force, brute force, data structures, data structures, dfs and similar, divide and conquer, implementation, trees, two pointers	2600	x445
2236F2	Elections in Saransk (hard version) combinatorics, dp, dp, dp, math, number theory	2200	x1237
2236F1	Elections in Saransk (easy version) number theory	1700	x5283
2236E	Friendly Gifts brute force, dp	1700	x6792
2236D	Brand New Tatar TV Show binary search, constructive algorithms, dp, games, games, math	1300	x13348
2236C	Omsk Programmers brute force, greedy, greedy, math, math	1000	x21875
2236B	Tatar TV Show greedy, math, strings	800	x29385
2236A	Games on the Train greedy, math	800	x35905
2234G	Stripe, Token and Two Players data structures, dp, games	2700	x407
2234F	Vessels, Heights and Two Versions (Hard Version) data structures, dfs and similar, dsu, greedy, implementation, two pointers	2000	x2460
2234E	Vlad, Misha and Two Arrays brute force, combinatorics, dfs and similar, divide and conquer, math	2100	x2193
2234D	XOR, Expression and Two Binary Numbers bitmasks, divide and conquer, dp, math, number theory	1500	x9118
2234C	Vessels, Heights and Two Versions (Easy Version) dfs and similar, dsu, greedy, implementation, two pointers	1200	x12629
2234B	Palindrome, Twelve and Two Terms brute force, constructive algorithms, math	800	x22829
2234A	Euclid, Sequence and Two Numbers math, number theory, sortings	800	x24854
2233F	Shortest GCD Paths dp, graphs, math, number theory, shortest paths, shortest paths	2800	x536
2233E2	Permutation Transmission (Difficult Version) bitmasks, combinatorics, sortings	2300	x1367
2233E1	Permutation Transmission (Easy Version) bitmasks, combinatorics, sortings	2300	x1293
2233D	Goods on the Shelf brute force, data structures, implementation, two pointers	1900	x3696
2233C	Cost of a Bracket Sequence brute force, dp, greedy	1400	x9918
2233B	Different Distances constructive algorithms	900	x18587
2233A	AI Project Development brute force, math	800	x23596
2232F	The Cake Is a Lie greedy, math, number theory, number theory	3000	x318
2232E	Snaking Arrangement combinatorics, combinatorics, combinatorics, constructive algorithms	2600	x640
2232D	Magical Tiered Cake constructive algorithms, constructive algorithms, dfs and similar, dp, greedy	2000	x2836
2232C2	Seating Arrangement (Hard Version) binary search, binary search, binary search, greedy, greedy, greedy, math, two pointers	1600	x9071
2232C1	Seating Arrangement (Easy Version) binary search, binary search, dp, greedy, greedy, two pointers, two pointers	1300	x12547
2232B	Cake Leveling binary search, greedy, math	900	x21727
2232A	Convergence greedy, sortings, sortings, sortings	800	x23816
2231F	Quadratic Jumps brute force, constructive algorithms, greedy, math, number theory	2600	x850
2231E	Graph Cutting dfs and similar, dp, math, trees	2300	x1233
2231D	Maximum Prefix Sums constructive algorithms, greedy, implementation, two pointers	1900	x3988
2231C	Chipmunk Theo and Equality implementation, sortings	1400	x12423
2231B	Another Sorting Problem constructive algorithms	1100	x18655
2231A	Construct an Array constructive algorithms	800	x26106
2230F	Game on Growing Tree binary search, dfs and similar, divide and conquer, dp, games, implementation, trees	2700	x541

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