Problemset - Codeforces

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Codeforces Round 977 (Div. 2)
2 days
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Problems

#	Name
1884B	Haunted House binary search, greedy, math, two pointers	1100	x12658
1882B	Sets and Union bitmasks, brute force, constructive algorithms, greedy	1300	x15381
1881D	Divide and Equalize math, number theory	1300	x17107
1881C	Perfect Square brute force, implementation	1200	x17052
1879C	Make it Alternating combinatorics, dp, greedy	1300	x16923
1877C	Joyboard math, number theory	1200	x10928
1874A	Jellyfish and Game brute force, games, greedy, implementation	1200	x17009
1873F	Money Trees binary search, greedy, math, two pointers	1300	x15449
1873E	Building an Aquarium binary search, sortings	1100	x26593
1872D	Plus Minus Permutation math	1200	x23923
1872C	Non-coprime Split math, number theory	1100	x23368
1870C	Colorful Table binary search, data structures, dp, implementation, math, two pointers	1300	x11467
1870B	Friendly Arrays bitmasks, greedy, math	1200	x14141
1869B	2D Traveling geometry, math, shortest paths, sortings	1100	x16066
1868A	Fill in the Matrix constructive algorithms, implementation	1300	x11981
1867C	Salyg1n and the MEX Game constructive algorithms, data structures, games, greedy, interactive	1300	x11218
1867B	XOR Palindromes bitmasks, constructive algorithms, strings	1100	x16715
1864C	Divisor Chain bitmasks, constructive algorithms, math, number theory	1300	x13467
1864B	Swap and Reverse constructive algorithms, greedy, sortings, strings	1100	x15351
1863C	MEX Repetition implementation, math	1100	x14009
1863B	Split Sort greedy, math, sortings	1100	x15260
1862D	Ice Cream Balls binary search, combinatorics, constructive algorithms, math	1300	x17172
1862C	Flower City Fence binary search, data structures, implementation, sortings	1100	x20784
1860B	Fancy Coins binary search, brute force, greedy, math	1200	x16920
1859C	Another Permutation Problem brute force, dp, greedy, math	1200	x16980
1857D	Strong Vertices math, sortings, trees	1300	x19511
1857C	Assembly via Minimums greedy, sortings	1200	x25987
1857B	Maximum Rounding greedy, implementation, math	1100	x22977
1853B	Fibonaccharsis binary search, brute force, math	1200	x17407
1851D	Prefix Permutation Sums implementation, math	1300	x15192
1850F	We Were Both Children brute force, implementation, math, number theory	1300	x19111
1850E	Cardboard for Pictures binary search, geometry, implementation, math	1100	x23168
1848B	Vika and the Bridge binary search, data structures, greedy, implementation, math, sortings	1200	x14940
1846E1	Rudolf and Snowflakes (simple version) brute force, implementation, math	1300	x16895
1846D	Rudolph and Christmas Tree constructive algorithms, geometry, math	1200	x19374
1846C	Rudolf and the Another Competition constructive algorithms, data structures, dp, greedy, sortings	1200	x18904
1844C	Particles dp, greedy, implementation, math	1300	x15645
1843D	Apple Tree combinatorics, dfs and similar, dp, math, trees	1200	x18025
1842B	Tenzing and Books bitmasks, greedy, math	1100	x17050
1840B	Binary Cafe bitmasks, combinatorics, math	1100	x22437
1839C	Insert Zero and Invert Prefix constructive algorithms	1300	x11962
1839B	Lamps greedy, sortings	1100	x15121
1838B	Minimize Permutation Subarrays constructive algorithms, math	1100	x16396
1836B	Astrophysicists greedy, math	1100	x12637
1834C	Game with Reversing games, greedy, math, strings	1200	x13274
1832C	Contrast Value greedy, implementation	1200	x20733
1832B	Maximum Sum brute force, sortings, two pointers	1100	x21941
1829F	Forever Winter dfs and similar, graphs, math	1300	x17525
1829E	The Lakes dfs and similar, dsu, graphs, implementation	1100	x19996
1827A	Counting Orders combinatorics, math, sortings, two pointers	1100	x19016
1826C	Dreaming of Freedom greedy, math, number theory	1300	x13557
1826B	Lunatic Never Content math, number theory	1100	x17638
1826A	Trust Nobody brute force, greedy, implementation, sortings	1200	x15183
1823C	Strongly Composite greedy, math, number theory	1300	x12281
1822D	Super-Permutation constructive algorithms, math	1200	x16718
1821C	Tear It Apart brute force, implementation, math, strings	1300	x14279
1821B	Sort the Subarray brute force, greedy	1100	x18539
1820B	JoJo's Incredible Adventures math, strings, two pointers	1100	x14659
1819A	Constructive Problem brute force, greedy	1300	x12672
1815A	Ian and Array Sorting greedy, math	1300	x14106
1811C	Restore the Array constructive algorithms, greedy	1100	x19846
1810C	Make It Permutation brute force, greedy, sortings	1300	x14491
1808B	Playing in a Casino math, sortings	1200	x16872
1807G2	Subsequence Addition (Hard Version) bitmasks, dp, greedy, implementation, sortings	1100	x19308
1807G1	Subsequence Addition (Easy Version) brute force, data structures, dp, greedy, implementation, sortings	1100	x18878
1807E	Interview binary search, implementation, interactive	1300	x12972
1800D	Remove Two Letters data structures, greedy, hashing, strings	1200	x23556
1800C2	Powering the Hero (hard version) data structures, greedy	1100	x22455
1799B	Equalize by Divide brute force, constructive algorithms, greedy, math	1200	x11352
1797B	Li Hua and Pattern constructive algorithms, greedy	1100	x15966
1794C	Scoring Subsequences binary search, greedy, math, two pointers	1300	x13813
1793C	Dora and Search constructive algorithms, data structures, two pointers	1200	x20289
1793B	Fedya and Array constructive algorithms, math	1100	x15809
1792B	Stand-up Comedian greedy, math	1200	x21349
1791G1	Teleporters (Easy Version) greedy, sortings	1100	x22582
1791E	Negatives and Positives dp, greedy, sortings	1100	x28340
1790D	Matryoshkas data structures, greedy, sortings	1200	x20171
1788C	Matching Numbers constructive algorithms, greedy, math	1300	x17217
1788B	Sum of Two Numbers constructive algorithms, greedy, implementation, math, probabilities	1100	x20027
1787B	Number Factorization greedy, math, number theory	1100	x13246
1786B	Cake Assembly Line brute force, sortings	1300	x8967
1783B	Matrix of Differences constructive algorithms, math	1100	x17766
1780B	GCD Partition brute force, greedy, math, number theory	1100	x18074
1778B	The Forbidden Permutation greedy, math	1300	x13295
1776H	Beppa and SwerChat two pointers	1300	x6390
1775B	Gardener and the Array bitmasks, constructive algorithms	1300	x13878
1774C	Ice and Fire constructive algorithms, dp, greedy	1300	x12005
1769C2	Подкрутка II *special problem, dp	1300	x965
1769C1	Подкрутка I *special problem, brute force, dp, greedy	1200	x969
1768C	Elemental Decompress constructive algorithms, greedy, implementation, sortings	1300	x14182
1766C	Hamiltonian Wall dp, implementation	1300	x13651
1763B	Incinerate binary search, brute force, data structures, implementation, math, sortings	1200	x14600
1762B	Make Array Good constructive algorithms, implementation, number theory, sortings	1100	x16939
1760E	Binary Inversions data structures, greedy, math	1100	x20282
1759C	Thermostat greedy, math, shortest paths	1100	x17620
1753A1	Make Nonzero Sum (easy version) constructive algorithms, dp, greedy	1300	x14904
1747C	Swap Game games	1200	x21210
1746C	Permutation Operations constructive algorithms, greedy, implementation, math	1300	x12797
1744D	Divisibility by 2^n greedy, math, sortings	1200	x21394
1743C	Save the Magazines constructive algorithms, dp, greedy	1100	x19158