Problemset - Codeforces

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Educational Codeforces Round 173 (Rated for Div. 2)
21:53:57
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Problems

#	Name
1863D	Two-Colored Dominoes constructive algorithms, greedy	1400	x9689
1863C	MEX Repetition implementation, math	1100	x14305
1863B	Split Sort greedy, math, sortings	1100	x15479
1863A	Channel greedy, implementation	800	x18026
1862G	The Great Equalizer binary search, data structures, math, sortings	2000	x2946
1862F	Magic Will Save the World binary search, bitmasks, brute force, dp	1800	x6453
1862E	Kolya and Movie Theatre constructive algorithms, data structures, greedy	1600	x11012
1862D	Ice Cream Balls binary search, combinatorics, constructive algorithms, math	1300	x17576
1862C	Flower City Fence binary search, data structures, implementation, sortings	1100	x21134
1862B	Sequence Game constructive algorithms	800	x33687
1862A	Gift Carpet dp, greedy, implementation, strings	800	x32945
1861F	Four Suits binary search, bitmasks, flows, greedy	3200	x212
1861E	Non-Intersecting Subpermutations combinatorics, dp, implementation, math	2300	x1772
1861D	Sorting By Multiplication dp, greedy	1800	x6954
1861C	Queries for the Array data structures, dfs and similar, implementation, strings, trees	1600	x10374
1861B	Two Binary Strings constructive algorithms, dp, greedy	1000	x21752
1861A	Prime Deletion constructive algorithms, math	800	x24102
1860F	Evaluate RBS data structures, geometry, implementation, math, sortings	2900	x282
1860E	Fast Travel Text Editor data structures, dfs and similar, graphs, shortest paths	2400	x1473
1860D	Balanced String dp	2200	x3079
1860C	Game on Permutation data structures, dp, games, greedy	1400	x13645
1860B	Fancy Coins binary search, brute force, greedy, math	1200	x17253
1860A	Not a Substring constructive algorithms, strings	900	x22056
1859F	Teleportation in Byteland data structures, dfs and similar, divide and conquer, graphs, shortest paths, trees	3200	x415
1859E	Maximum Monogonosity brute force, dp, math	2500	x1823
1859D	Andrey and Escape from Capygrad binary search, data structures, dp, dsu, greedy, sortings	1800	x7165
1859C	Another Permutation Problem brute force, dp, greedy, math	1200	x17248
1859B	Olya and Game with Arrays constructive algorithms, greedy, math, sortings	1000	x28420
1859A	United We Stand constructive algorithms, math, number theory	800	x34135
1858E2	Rollbacks (Hard Version) data structures, interactive, trees	2600	x1082
1858E1	Rollbacks (Easy Version) brute force, data structures, dfs and similar, trees	2500	x1355
1858D	Trees and Segments brute force, data structures, dp, greedy, two pointers	2200	x2869
1858C	Yet Another Permutation Problem constructive algorithms, greedy, math, number theory	1000	x23442
1858B	The Walkway brute force, dp, greedy, math, number theory	1500	x11545
1858A	Buttons games, greedy, math	800	x40631
1857G	Counting Graphs combinatorics, divide and conquer, dsu, graphs, greedy, sortings, trees	2000	x4600
1857F	Sum and Product binary search, data structures, math	1600	x11955
1857E	Power of Points math, sortings	1500	x12778
1857D	Strong Vertices math, sortings, trees	1300	x20330
1857C	Assembly via Minimums greedy, sortings	1200	x27334
1857B	Maximum Rounding greedy, implementation, math	1100	x23275
1857A	Array Coloring greedy, math	800	x50545
1856E2	PermuTree (hard version) bitmasks, dfs and similar, dp, fft, greedy, implementation, math, trees	2700	x1455
1856E1	PermuTree (easy version) dfs and similar, dp, trees	1800	x5477
1856D	More Wrong divide and conquer, interactive	2100	x3320
1856C	To Become Max binary search, brute force, data structures, dp	1600	x12850
1856B	Good Arrays implementation, math	900	x24735
1856A	Tales of a Sort implementation	800	x26803
1855B	Longest Divisors Interval brute force, combinatorics, greedy, math, number theory	900	x28023
1855A	Dalton the Teacher greedy, math	800	x28346
1854F	Mark and Spaceship brute force, dp	3500	x125
1854E	Game Bundles brute force, constructive algorithms, dp, greedy, math	3000	x439
1854D	Michael and Hotel binary search, interactive, trees	3000	x556
1854C	Expected Destruction combinatorics, dp, math, probabilities	2500	x1550
1854B	Earn or Unlock bitmasks, brute force, dp	2200	x3615
1854A2	Dual (Hard Version) constructive algorithms, math	1900	x7114
1854A1	Dual (Easy Version) constructive algorithms, math	1400	x14403
1853B	Fibonaccharsis binary search, brute force, math	1200	x17701
1853A	Desorting brute force, greedy, math	800	x33565
1852F	Panda Meetups data structures, dp, flows	3500	x109
1852E	Rivalries constructive algorithms, data structures, greedy	3400	x171
1852D	Miriany and Matchstick constructive algorithms, dp, greedy	2800	x487
1852C	Ina of the Mountain data structures, dp, greedy, math	2400	x1654
1852B	Imbalanced Arrays constructive algorithms, graphs, greedy, math, sortings, two pointers	1800	x4585
1852A	Ntarsis' Set binary search, math, number theory	1800	x8219
1851G	Vlad and the Mountains binary search, data structures, dsu, graphs, implementation, sortings, trees, two pointers	2000	x3336
1851F	Lisa and the Martians bitmasks, greedy, math, strings, trees	1800	x6029
1851E	Nastya and Potions dfs and similar, dp, graphs, sortings	1500	x10667
1851D	Prefix Permutation Sums implementation, math	1300	x15534
1851C	Tiles Comeback greedy	1000	x23741
1851B	Parity Sort greedy, sortings, two pointers	800	x29734
1851A	Escalator Conversations brute force, constructive algorithms, math	800	x29860
1850H	The Third Letter dfs and similar, dsu, graphs, greedy, implementation	1700	x8474
1850G	The Morning Star combinatorics, data structures, geometry, implementation, math, sortings	1500	x12915
1850F	We Were Both Children brute force, implementation, math, number theory	1300	x19999
1850E	Cardboard for Pictures binary search, geometry, implementation, math	1100	x24363
1850D	Balanced Round brute force, greedy, implementation, sortings	900	x38943
1850C	Word on the Paper implementation, strings	800	x45715
1850B	Ten Words of Wisdom implementation, sortings	800	x43884
1850A	To My Critics implementation, sortings	800	x58895
1849F	XOR Partition binary search, bitmasks, data structures, divide and conquer, greedy, trees	2700	x734
1849E	Max to the Right of Min binary search, data structures, divide and conquer, dp, dsu, two pointers	2300	x1697
1849D	Array Painting constructive algorithms, greedy, two pointers	1700	x8787
1849C	Binary String Copying binary search, brute force, data structures, hashing, strings	1600	x10821
1849B	Monsters greedy, math, sortings	1000	x27234
1849A	Morning Sandwich implementation, math	800	x29966
1848F	Vika and Wiki binary search, bitmasks, combinatorics, divide and conquer, dp, math	2400	x1659
1848E	Vika and Stone Skipping brute force, implementation, math, number theory	2600	x807
1848D	Vika and Bonuses binary search, brute force, math, ternary search	2200	x2661
1848C	Vika and Price Tags math, number theory	1800	x6428
1848B	Vika and the Bridge binary search, data structures, greedy, implementation, math, sortings	1200	x15777
1848A	Vika and Her Friends games, math	900	x17037
1847F	The Boss's Identity binary search, bitmasks, data structures, dfs and similar, greedy, math, sortings	2500	x921
1847E	Triangle Platinum? brute force, combinatorics, implementation, interactive, math, probabilities	2900	x335
1847D	Professor Higashikata data structures, dsu, greedy, implementation, strings	1900	x3862
1847C	Vampiric Powers, anyone? bitmasks, brute force, dp, greedy	1400	x13124
1847B	Hamon Odyssey bitmasks, greedy, two pointers	1000	x20297
1847A	The Man who became a God greedy, sortings	800	x22111
1846G	Rudolf and CodeVid-23 bitmasks, dp, graphs, greedy, shortest paths	1900	x4524
1846F	Rudolph and Mimic constructive algorithms, implementation, interactive	1800	x3200