Problemset - Codeforces

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Codeforces Round 1002 (Div. 2)
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Problems

#	Name
1957D	A BIT of an Inequality bitmasks, brute force, dp, math	1900	x4687
1957C	How Does the Rook Move? combinatorics, dp, math	1600	x10138
1957B	A BIT of a Construction bitmasks, constructive algorithms, greedy, implementation	1100	x18461
1957A	Stickogon constructive algorithms, greedy	800	x23918
1956F	Nene and the Passing Game constructive algorithms, data structures, dsu, graphs, sortings	3000	x392
1956E2	Nene vs. Monsters (Hard Version) brute force, greedy, implementation, math	2700	x920
1956E1	Nene vs. Monsters (Easy Version) brute force, implementation, math	2500	x1507
1956D	Nene and the Mex Operator bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math	2000	x4092
1956C	Nene's Magical Matrix constructive algorithms, greedy, math	1600	x13530
1956B	Nene and the Card Game games, greedy	800	x21763
1956A	Nene's Game binary search, brute force, data structures, games, greedy	800	x22317
1955H	The Most Reckless Defense bitmasks, brute force, constructive algorithms, dp, flows, graph matchings, shortest paths	2300	x1305
1955G	GCD on a grid brute force, dfs and similar, dp, implementation, math, number theory	1900	x4785
1955F	Unfair Game dp, games, greedy, math, schedules	1800	x7431
1955E	Long Inversions brute force, greedy, implementation, sortings	1700	x8986
1955D	Inaccurate Subsequence Search data structures, two pointers	1400	x16122
1955C	Inhabitant of the Deep Sea greedy, implementation, math	1300	x22070
1955B	Progressive Square constructive algorithms, data structures, implementation, sortings	1000	x28929
1955A	Yogurt Sale math	800	x45588
1954F	Unique Strings combinatorics, dp, math	3100	x271
1954E	Chain Reaction binary search, data structures, dsu, greedy, implementation, math, number theory	2200	x2443
1954D	Colored Balls combinatorics, dp, math, sortings	1800	x6532
1954C	Long Multiplication greedy, math, number theory	1200	x20263
1954B	Make It Ugly implementation, math	1200	x19330
1954A	Painting the Ribbon constructive algorithms, greedy, math	900	x24970
1953A	Accuracy-Preserving Summation Algorithm *special problem
1952J	Help, what does it mean to be "Based" *special problem, brute force, constructive algorithms, expression parsing, implementation, sortings		x792
1952I	Dark Matter bitmasks, geometry		x551
1952H	Palindrome *special problem, implementation, strings		x716
1952G	Mathematician Takeover *special problem, binary search, dfs and similar, math		x1054
1952F	Grid *special problem, brute force		x1779
1952E	Sweep Line *special problem, combinatorics, games, math		x268
1952D	Are You a Procrastinator? *special problem, implementation		x4729
1952C	They Have Fooled *special problem, brute force, schedules		x2965
1952B	Is it stated? *special problem, strings		x11323
1952A	Are You a Robot, Again? *special problem, strings		x12730
1951I	Growing Trees binary search, constructive algorithms, flows, graphs, greedy	3200	x82
1951H	Thanos Snap binary search, dp, games, greedy, trees	3200	x289
1951G	Clacking Balls combinatorics, math, probabilities	3100	x348
1951F	Inversion Composition constructive algorithms, data structures, greedy	2500	x799
1951E	No Palindromes brute force, constructive algorithms, divide and conquer, greedy, hashing, implementation, math, strings	2000	x3782
1951D	Buying Jewels constructive algorithms, greedy, math	2000	x5607
1951C	Ticket Hoarding greedy, math, sortings	1400	x12229
1951B	Battle Cows binary search, data structures, greedy	1200	x15260
1951A	Dual Trigger constructive algorithms, greedy, math	900	x20474
1950G	Shuffling Songs bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings	1900	x4654
1950F	0, 1, 2, Tree! bitmasks, brute force, greedy, implementation, trees	1700	x9623
1950E	Nearly Shortest Repeating Substring brute force, implementation, number theory, strings	1500	x15170
1950D	Product of Binary Decimals brute force, dp, implementation, number theory	1100	x24059
1950C	Clock Conversion implementation, math	800	x41647
1950B	Upscaling implementation	800	x39680
1950A	Stair, Peak, or Neither? implementation	800	x56762
1949K	Make Triangle constructive algorithms, math	2800	x343
1949J	Amanda the Amoeba graphs, implementation, trees, two pointers	2600	x421
1949I	Disks dfs and similar, geometry, graph matchings, graphs	1800	x2011
1949H	Division Avoidance greedy, math	3100	x131
1949G	Scooter graphs, greedy	2300	x830
1949F	Dating greedy, sortings, trees	2200	x1073
1949E	Damage per Second brute force, math	2900	x110
1949D	Funny or Scary? constructive algorithms	2600	x437
1949C	Annual Ants' Gathering dfs and similar, dp, greedy, trees	1900	x1896
1949B	Charming Meals binary search, brute force, greedy, sortings	1500	x3663
1949A	Grove brute force, dfs and similar, dp, geometry, probabilities	3300	x124
1948G	MST with Matching bitmasks, brute force, dsu, graph matchings, trees	3100	x723
1948F	Rare Coins combinatorics, math, probabilities	2500	x1385
1948E	Clique Partition brute force, constructive algorithms, graphs, greedy, implementation	2100	x3105
1948D	Tandem Repeats? brute force, strings, two pointers	1700	x9826
1948C	Arrow Path brute force, constructive algorithms, dfs and similar, dp, graphs, shortest paths	1300	x17644
1948B	Array Fix brute force, dp, greedy, implementation	1100	x23648
1948A	Special Characters brute force, constructive algorithms	800	x29289
1946F	Nobody is needed 2-sat, data structures, dfs and similar, dp	2500	x1045
1946E	Girl Permutation combinatorics, dp, math, number theory	2200	x2665
1946D	Birthday Gift bitmasks, brute force, constructive algorithms, greedy, implementation	1900	x4919
1946C	Tree Cutting binary search, dp, greedy, implementation, trees	1600	x11545
1946B	Maximum Sum dp, greedy, math	1100	x21093
1946A	Median of an Array greedy, implementation, sortings	800	x26738
1945H	GCD is Greater brute force, data structures, math, number theory	2600	x714
1945G	Cook and Porridge binary search, constructive algorithms, data structures, implementation	2500	x772
1945F	Kirill and Mushrooms data structures, sortings	1900	x4411
1945E	Binary Search binary search, constructive algorithms, greedy	1700	x8549
1945D	Seraphim the Owl dp, greedy	1300	x15136
1945C	Left and Right Houses brute force	1200	x15519
1945B	Fireworks math, number theory	900	x23485
1945A	Setting up Camp greedy, math	800	x28362
1944B	Equal XOR bitmasks, constructive algorithms	1100	x16671
1944A	Destroying Bridges graphs, greedy, math	800	x24527
1943F	Minimum Hamming Distance dp	3500	x118
1943E2	MEX Game 2 (Hard Version) binary search, greedy, two pointers	3300	x309
1943E1	MEX Game 2 (Easy Version) binary search, brute force, greedy	2900	x450
1943D2	Counting Is Fun (Hard Version) combinatorics, dp	2800	x858
1943D1	Counting Is Fun (Easy Version) brute force, combinatorics, dp, math	2400	x1586
1943C	Tree Compass constructive algorithms, dfs and similar, greedy, trees	2300	x2215
1943B	Non-Palindromic Substring hashing, implementation, math, strings	2000	x4004
1943A	MEX Game 1 games, greedy	1300	x18780
1942H	Farmer John's Favorite Intern data structures, dp, flows, trees	3500	x114
1942G	Bessie and Cards combinatorics, dp, math	2800	x495
1942F	Farmer John's Favorite Function brute force, data structures, implementation, math	2700	x725
1942E	Farm Game combinatorics, games	2300	x1749
1942D	Learning to Paint binary search, data structures, dfs and similar, dp, greedy, implementation, sortings	2100	x2906
1942C2	Bessie's Birthday Cake (Hard Version) geometry, greedy, math	1700	x6332