Problemset - Codeforces

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Codeforces Round (Div. 2)
4 days
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Problems

#	Name
1822E	Making Anti-Palindromes greedy, math, strings	1600	x10424
1822D	Super-Permutation constructive algorithms, math	1200	x16705
1822C	Bun Lover math	800	x22996
1822B	Karina and Array greedy, math, sortings	800	x24723
1822A	TubeTube Feed brute force, implementation	800	x24248
1821F	Timber combinatorics, dp, fft, math	2600	x751
1821E	Rearrange Brackets brute force, dp, greedy, sortings, strings	2100	x2368
1821D	Black Cells binary search, brute force, greedy, math	1900	x4960
1821C	Tear It Apart brute force, implementation, math, strings	1300	x14267
1821B	Sort the Subarray brute force, greedy	1100	x18518
1821A	Matching combinatorics, math	800	x19772
1820B	JoJo's Incredible Adventures math, strings, two pointers	1100	x14641
1820A	Yura's New Name implementation, strings	800	x16668
1819F	Willy-nilly, Crack, Into Release! data structures, dp	3500	x131
1819E	Roads in E City interactive, math, probabilities, trees	3200	x282
1819D	Misha and Apples brute force, data structures, dp, two pointers	2800	x636
1819C	The Fox and the Complete Tree Traversal constructive algorithms, dp, implementation, math, trees	2400	x1471
1819B	The Butcher geometry, greedy, implementation, sortings, two pointers	1900	x3571
1819A	Constructive Problem brute force, greedy	1300	x12665
1818B	Indivisible constructive algorithms	900	x14958
1818A	Politics greedy, implementation	800	x12955
1817F	Entangled Substrings string suffix structures, strings	3500	x206
1817E	Half-sum brute force, divide and conquer, greedy	3400	x260
1817D	Toy Machine constructive algorithms, games, implementation	2700	x775
1817C	Similar Polynomials combinatorics, math	2400	x979
1817B	Fish Graph brute force, constructive algorithms, dfs and similar, graphs	1900	x4123
1817A	Almost Increasing Subsequence binary search, data structures, greedy	1500	x11002
1816B	Grid Reconstruction constructive algorithms, greedy	1000	x15253
1816A	Ian Visits Mary constructive algorithms, geometry, number theory	800	x17570
1815F	OH NO1 (-2-3-4) constructive algorithms, graphs, math	3500	x226
1815E	Bosco and Particle dp, math, number theory, strings	3100	x348
1815D	XOR Counting bitmasks, combinatorics, dp, math	2600	x1158
1815C	Between constructive algorithms, dfs and similar, graphs, greedy	2200	x1968
1815B	Sum Graph brute force, constructive algorithms, graphs, implementation, interactive, shortest paths, trees	2000	x3033
1815A	Ian and Array Sorting greedy, math	1300	x14100
1814F	Communication Towers brute force, divide and conquer, dsu	2700	x620
1814E	Chain Chips data structures, dp, matrices	2300	x1341
1814D	Balancing Weapons binary search, brute force, data structures, math, two pointers	2500	x865
1814C	Search in Parallel constructive algorithms, greedy, sortings	1500	x10796
1814B	Long Legs brute force, math	1700	x9996
1814A	Coins implementation, math	800	x28784
1812J	Unmysterious Language *special problem, constructive algorithms, strings		x5903
1812I	Mountain Climber *special problem		x268
1812H	Expected Twist *special problem, interactive		x148
1812G	Colour Vision *special problem, implementation		x552
1812F	Factorization *special problem, number theory		x1254
1812E	Not a Geometry Problem special problem, special problem, constructive algorithms, geometry, math		x4010
1812D	Trivial Conjecture *special problem, constructive algorithms, math, number theory		x4659
1812C	Digits *special problem		x1267
1812B	Was it Rated? special problem, special problem, *special problem, brute force, implementation		x5691
1812A	Are You a Robot? special problem, special problem, *special problem, expression parsing, strings		x13283
1811G2	Vlad and the Nice Paths (hard version) binary search, combinatorics, data structures, dp, math, two pointers	2200	x1757
1811G1	Vlad and the Nice Paths (easy version) combinatorics, dp, math	2100	x2069
1811F	Is It Flower? dfs and similar, graphs, implementation	2100	x1832
1811E	Living Sequence binary search, dp, math, number theory	1500	x12292
1811D	Umka and a Long Flight constructive algorithms, implementation, math	1600	x7480
1811C	Restore the Array constructive algorithms, greedy	1100	x19827
1811B	Conveyor Belts implementation, math	1000	x20347
1811A	Insert Digit greedy, math, strings	800	x31070
1810H	Last Number combinatorics, math	2900	x140
1810G	The Maximum Prefix dp	3200	x710
1810F	M-tree data structures, math, sortings, trees	2800	x572
1810E	Monsters brute force, data structures, dfs and similar, dsu, graphs, greedy	2100	x3177
1810D	Climbing the Tree binary search, math	1700	x7430
1810C	Make It Permutation brute force, greedy, sortings	1300	x14485
1810B	Candies constructive algorithms, math, number theory	800	x17488
1810A	Beautiful Sequence brute force, greedy	800	x20688
1809G	Prediction combinatorics, dp, math	2800	x442
1809F	Traveling in Berland binary search, data structures, graphs, greedy, implementation	2500	x767
1809E	Two Tanks binary search, dp, implementation, math	2400	x837
1809D	Binary String Sorting constructive algorithms, greedy	1800	x6285
1809C	Sum on Subarrays constructive algorithms, greedy, math	1500	x12740
1809B	Points on Plane binary search, greedy, math	1000	x19745
1809A	Garland implementation	800	x23841
1808E3	Minibuses on Venus (hard version) brute force, combinatorics, dp, math	2800	x442
1808E2	Minibuses on Venus (medium version) combinatorics, divide and conquer, dp, matrices	2500	x691
1808E1	Minibuses on Venus (easy version) combinatorics, divide and conquer, dp	2200	x1332
1808D	Petya, Petya, Petr, and Palindromes binary search, brute force, data structures, two pointers	2100	x2310
1808C	Unlucky Numbers brute force, dp, greedy, implementation	1900	x3785
1808B	Playing in a Casino math, sortings	1200	x16845
1808A	Lucky Numbers brute force, implementation	900	x18165
1807G2	Subsequence Addition (Hard Version) bitmasks, dp, greedy, implementation, sortings	1100	x19293
1807G1	Subsequence Addition (Easy Version) brute force, data structures, dp, greedy, implementation, sortings	1100	x18871
1807F	Bouncy Ball brute force, dfs and similar, implementation	1700	x6264
1807E	Interview binary search, implementation, interactive	1300	x12958
1807D	Odd Queries data structures, implementation	900	x32483
1807C	Find and Replace greedy, implementation, strings	800	x30383
1807B	Grab the Candies greedy	800	x41806
1807A	Plus or Minus implementation	800	x61325
1806F2	GCD Master (hard version) greedy, math, sortings	2900	x295
1806F1	GCD Master (easy version) greedy, math, number theory, sortings	2900	x352
1806E	Tree Master brute force, data structures, dfs and similar, trees	2200	x2834
1806D	DSU Master combinatorics, dp, dsu, math	2500	x910
1806C	Sequence Master brute force, constructive algorithms, math	1600	x7602
1806B	Mex Master constructive algorithms, greedy	900	x17710
1806A	Walking Master geometry, greedy, math	800	x24672
1805F2	Survival of the Weakest (hard version) greedy, math, sortings, two pointers	3100	x349
1805F1	Survival of the Weakest (easy version) binary search, brute force, implementation, math, sortings	2600	x900
1805E	There Should Be a Lot of Maximums brute force, data structures, dfs and similar, dp, trees, two pointers	2300	x1610
1805D	A Wide, Wide Graph dfs and similar, dp, graphs, greedy, trees	1800	x6551