Problemset - Codeforces

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Codeforces Round (Div. 2)
7 days

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Problems

#	Name
1866M	Mighty Rock Tower brute force, combinatorics, dp, math, probabilities	2400	x768
1866L	Lihmuf Balling binary search, brute force, math	2400	x707
1866K	Keen Tree Calculation binary search, data structures, dp, geometry, graphs, implementation, trees	2500	x442
1866J	Jackets and Packets dp	2800	x288
1866I	Imagination Castle dp, games, two pointers	2300	x765
1866H	Happy Sets combinatorics	2100	x1650
1866G	Grouped Carriages binary search, data structures, dp, flows, greedy	2100	x1688
1866F	Freak Joker Process binary search, data structures, sortings	3100	x136
1866E	Elevators of Tamem dp	2700	x403
1866D	Digital Wallet dp, greedy	2300	x1311
1866C	Completely Searching for Inversions dfs and similar, dp, graphs	1900	x3046
1866B	Battling with Numbers combinatorics, math, number theory	1400	x7724
1866A	Ambitious Kid math	800	x22052
1864I	Future Dominators graphs, greedy	3500	x88
1864H	Asterism Stream dp, math, matrices	3200	x280
1864G	Magic Square combinatorics, constructive algorithms, implementation	3100	x271
1864F	Exotic Queries data structures, implementation, sortings	2300	x1436
1864E	Guess Game bitmasks, data structures, games, math, probabilities, sortings, strings, trees	2100	x2635
1864D	Matrix Cascade brute force, constructive algorithms, data structures, dp, greedy, math	1700	x6763
1864C	Divisor Chain bitmasks, constructive algorithms, math, number theory	1300	x13488
1864B	Swap and Reverse constructive algorithms, greedy, sortings, strings	1100	x15357
1864A	Increasing and Decreasing constructive algorithms, greedy, implementation, math	800	x20283
1863I	Redundant Routes constructive algorithms, dp, trees	3500	x77
1863H	Goldberg Machine 3 dp, trees	3500	x77
1863G	Swaps combinatorics, dp, graphs, math	2800	x623
1863F	Divide, XOR, and Conquer bitmasks, dp, math	2600	x1128
1863E	Speedrun brute force, dfs and similar, dp, graphs, greedy, math, sortings, two pointers	2100	x2771
1863D	Two-Colored Dominoes constructive algorithms, greedy	1400	x9504
1863C	MEX Repetition implementation, math	1100	x14024
1863B	Split Sort greedy, math, sortings	1100	x15275
1863A	Channel greedy, implementation	800	x17918
1862G	The Great Equalizer binary search, data structures, math, sortings	2000	x2871
1862F	Magic Will Save the World binary search, bitmasks, brute force, dp	1800	x6249
1862E	Kolya and Movie Theatre constructive algorithms, data structures, greedy	1600	x10702
1862D	Ice Cream Balls binary search, combinatorics, constructive algorithms, math	1300	x17183
1862C	Flower City Fence binary search, data structures, implementation, sortings	1100	x20802
1862B	Sequence Game constructive algorithms	800	x32174
1862A	Gift Carpet dp, greedy, implementation, strings	800	x32433
1861F	Four Suits binary search, bitmasks, flows, greedy	3200	x203
1861E	Non-Intersecting Subpermutations combinatorics, dp, implementation, math	2300	x1724
1861D	Sorting By Multiplication dp, greedy	1800	x6765
1861C	Queries for the Array data structures, dfs and similar, implementation, strings, trees	1600	x10121
1861B	Two Binary Strings constructive algorithms, dp, greedy	1000	x21334
1861A	Prime Deletion constructive algorithms, math	800	x23851
1860F	Evaluate RBS data structures, geometry, implementation, math, sortings	2900	x274
1860E	Fast Travel Text Editor data structures, dfs and similar, graphs, shortest paths	2400	x1403
1860D	Balanced String dp	2200	x2984
1860C	Game on Permutation data structures, dp, games, greedy	1400	x13321
1860B	Fancy Coins binary search, brute force, greedy, math	1200	x16938
1860A	Not a Substring constructive algorithms, strings	900	x21684
1859F	Teleportation in Byteland data structures, dfs and similar, divide and conquer, graphs, shortest paths, trees	3200	x398
1859E	Maximum Monogonosity brute force, dp, math	2500	x1770
1859D	Andrey and Escape from Capygrad binary search, data structures, dp, dsu, greedy, sortings	1800	x6991
1859C	Another Permutation Problem brute force, dp, greedy, math	1200	x16997
1859B	Olya and Game with Arrays constructive algorithms, greedy, math, sortings	1000	x27195
1859A	United We Stand constructive algorithms, math, number theory	800	x32621
1858E2	Rollbacks (Hard Version) data structures, interactive, trees	2600	x1064
1858E1	Rollbacks (Easy Version) brute force, data structures, dfs and similar, trees	2500	x1329
1858D	Trees and Segments brute force, data structures, dp, greedy, two pointers	2200	x2825
1858C	Yet Another Permutation Problem constructive algorithms, greedy, math, number theory	1000	x23073
1858B	The Walkway brute force, dp, greedy, math, number theory	1500	x11314
1858A	Buttons games, greedy, math	800	x38507
1857G	Counting Graphs combinatorics, divide and conquer, dsu, graphs, greedy, sortings, trees	2000	x4446
1857F	Sum and Product binary search, data structures, math	1600	x11531
1857E	Power of Points math, sortings	1500	x12443
1857D	Strong Vertices math, sortings, trees	1300	x19542
1857C	Assembly via Minimums greedy, sortings	1200	x26034
1857B	Maximum Rounding greedy, implementation, math	1100	x22994
1857A	Array Coloring greedy, math	800	x48238
1856E2	PermuTree (hard version) bitmasks, dfs and similar, dp, fft, greedy, implementation, math, trees	2700	x1388
1856E1	PermuTree (easy version) dfs and similar, dp, trees	1800	x5309
1856D	More Wrong divide and conquer, interactive	2100	x3255
1856C	To Become Max binary search, brute force, data structures, dp	1600	x12350
1856B	Good Arrays implementation, math	900	x24302
1856A	Tales of a Sort implementation	800	x26500
1855B	Longest Divisors Interval brute force, combinatorics, greedy, math, number theory	900	x26739
1855A	Dalton the Teacher greedy, math	800	x27946
1854F	Mark and Spaceship brute force, dp	3500	x120
1854E	Game Bundles brute force, constructive algorithms, dp, greedy, math	3000	x431
1854D	Michael and Hotel binary search, interactive, trees	3000	x543
1854C	Expected Destruction combinatorics, dp, math, probabilities	2500	x1497
1854B	Earn or Unlock bitmasks, brute force, dp	2200	x3527
1854A2	Dual (Hard Version) constructive algorithms, math	1900	x6999
1854A1	Dual (Easy Version) constructive algorithms, math	1400	x14109
1853B	Fibonaccharsis binary search, brute force, math	1200	x17420
1853A	Desorting brute force, greedy, math	800	x31903
1852F	Panda Meetups data structures, dp, flows	3500	x106
1852E	Rivalries constructive algorithms, data structures, greedy	3400	x166
1852D	Miriany and Matchstick constructive algorithms, dp, greedy	2800	x459
1852C	Ina of the Mountain data structures, dp, greedy, math	2400	x1561
1852B	Imbalanced Arrays constructive algorithms, graphs, greedy, math, sortings, two pointers	1800	x4468
1852A	Ntarsis' Set binary search, math, number theory	1800	x8052
1851G	Vlad and the Mountains binary search, data structures, dsu, graphs, implementation, sortings, trees, two pointers	2000	x3225
1851F	Lisa and the Martians bitmasks, greedy, math, strings, trees	1800	x5833
1851E	Nastya and Potions dfs and similar, dp, graphs, sortings	1500	x10333
1851D	Prefix Permutation Sums implementation, math	1300	x15207
1851C	Tiles Comeback greedy	1000	x23371
1851B	Parity Sort greedy, sortings, two pointers	800	x29266
1851A	Escalator Conversations brute force, constructive algorithms, math	800	x29505
1850H	The Third Letter dfs and similar, dsu, graphs, greedy, implementation	1700	x8200