Problemset - Codeforces

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Codeforces Round (Div. 2)
7 days

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Problems

#	Name
1956B	Nene and the Card Game games, greedy	800	x21067
1956A	Nene's Game binary search, brute force, data structures, games, greedy	800	x21384
1955H	The Most Reckless Defense bitmasks, brute force, constructive algorithms, dp, flows, graph matchings, shortest paths	2300	x1233
1955G	GCD on a grid brute force, dfs and similar, dp, implementation, math, number theory	1900	x4437
1955F	Unfair Game dp, games, greedy, math, schedules	1800	x6964
1955E	Long Inversions brute force, greedy, implementation, sortings	1700	x8469
1955D	Inaccurate Subsequence Search data structures, two pointers	1400	x15116
1955C	Inhabitant of the Deep Sea greedy, implementation, math	1300	x20900
1955B	Progressive Square constructive algorithms, data structures, implementation, sortings	1000	x27396
1955A	Yogurt Sale math	800	x42506
1954F	Unique Strings combinatorics, dp, math	3100	x248
1954E	Chain Reaction binary search, data structures, dsu, greedy, implementation, math, number theory	2200	x2208
1954D	Colored Balls combinatorics, dp, math, sortings	1800	x6011
1954C	Long Multiplication greedy, math, number theory	1200	x19124
1954B	Make It Ugly implementation, math	1200	x18303
1954A	Painting the Ribbon constructive algorithms, greedy, math	900	x23799
1953A	Accuracy-Preserving Summation Algorithm *special problem
1952J	Help, what does it mean to be "Based" brute force, constructive algorithms, expression parsing, implementation, sortings		x770
1952I	Dark Matter bitmasks, geometry		x533
1952H	Palindrome implementation, strings		x693
1952G	Mathematician Takeover binary search, dfs and similar, math		x1014
1952F	Grid brute force		x1736
1952E	Sweep Line combinatorics, games, math		x251
1952D	Are You a Procrastinator? implementation		x4543
1952C	They Have Fooled brute force, schedules		x2885
1952B	Is it stated? strings		x11089
1952A	Are You a Robot, Again? strings		x12351
1951I	Growing Trees binary search, constructive algorithms, flows, graphs, greedy	3200	x75
1951H	Thanos Snap binary search, dp, games, greedy, trees	3200	x267
1951G	Clacking Balls combinatorics, math, probabilities	3100	x329
1951F	Inversion Composition constructive algorithms, data structures, greedy	2500	x755
1951E	No Palindromes brute force, constructive algorithms, divide and conquer, greedy, hashing, implementation, math, strings	2000	x3578
1951D	Buying Jewels constructive algorithms, greedy, math	2000	x5342
1951C	Ticket Hoarding greedy, math, sortings	1400	x11467
1951B	Battle Cows binary search, data structures, greedy	1200	x14364
1951A	Dual Trigger constructive algorithms, greedy, math	900	x19403
1950G	Shuffling Songs bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings	1900	x4281
1950F	0, 1, 2, Tree! bitmasks, brute force, greedy, implementation, trees	1700	x9002
1950E	Nearly Shortest Repeating Substring brute force, implementation, number theory, strings	1500	x14199
1950D	Product of Binary Decimals brute force, dp, implementation, number theory	1100	x22926
1950C	Clock Conversion implementation, math	800	x39226
1950B	Upscaling implementation	800	x37510
1950A	Stair, Peak, or Neither? implementation	800	x51380
1949K	Make Triangle constructive algorithms, math	2800	x315
1949J	Amanda the Amoeba graphs, implementation, trees, two pointers	2600	x375
1949I	Disks dfs and similar, geometry, graph matchings, graphs	1800	x1776
1949H	Division Avoidance greedy, math	3100	x118
1949G	Scooter graphs, greedy	2300	x755
1949F	Dating greedy, sortings, trees	2200	x946
1949E	Damage per Second brute force, math	2900	x102
1949D	Funny or Scary? constructive algorithms	2600	x392
1949C	Annual Ants' Gathering dfs and similar, dp, greedy, trees	1900	x1681
1949B	Charming Meals binary search, brute force, greedy, sortings	1500	x3097
1949A	Grove brute force, dfs and similar, dp, geometry, probabilities	3300	x105
1948G	MST with Matching bitmasks, brute force, dsu, graph matchings, trees	3100	x681
1948F	Rare Coins combinatorics, math, probabilities	2500	x1293
1948E	Clique Partition brute force, constructive algorithms, graphs, greedy, implementation	2100	x2944
1948D	Tandem Repeats? brute force, strings, two pointers	1700	x9285
1948C	Arrow Path brute force, constructive algorithms, dfs and similar, dp, graphs, shortest paths	1300	x16593
1948B	Array Fix brute force, dp, greedy, implementation	1100	x22707
1948A	Special Characters brute force, constructive algorithms	800	x28337
1946F	Nobody is needed 2-sat, data structures, dfs and similar, dp	2500	x947
1946E	Girl Permutation combinatorics, dp, math, number theory	2200	x2512
1946D	Birthday Gift bitmasks, brute force, constructive algorithms, greedy, implementation	1900	x4657
1946C	Tree Cutting binary search, dp, greedy, implementation, trees	1600	x10742
1946B	Maximum Sum dp, greedy, math	1100	x20199
1946A	Median of an Array greedy, implementation, sortings	800	x25842
1945H	GCD is Greater brute force, data structures, math, number theory	2600	x648
1945G	Cook and Porridge binary search, constructive algorithms, data structures, implementation	2500	x736
1945F	Kirill and Mushrooms data structures, sortings	1900	x4147
1945E	Binary Search binary search, constructive algorithms, greedy	1700	x8008
1945D	Seraphim the Owl dp, greedy	1300	x14252
1945C	Left and Right Houses brute force	1200	x14734
1945B	Fireworks math, number theory	900	x22353
1945A	Setting up Camp greedy, math	800	x27334
1944B	Equal XOR bitmasks, constructive algorithms	1100	x16058
1944A	Destroying Bridges graphs, greedy, math	800	x23528
1943F	Minimum Hamming Distance dp	3500	x105
1943E2	MEX Game 2 (Hard Version) binary search, greedy, two pointers	3300	x295
1943E1	MEX Game 2 (Easy Version) binary search, brute force, greedy	2900	x430
1943D2	Counting Is Fun (Hard Version) combinatorics, dp	2800	x745
1943D1	Counting Is Fun (Easy Version) brute force, combinatorics, dp, math	2400	x1449
1943C	Tree Compass constructive algorithms, dfs and similar, greedy, trees	2300	x2068
1943B	Non-Palindromic Substring hashing, implementation, math, strings	2000	x3796
1943A	MEX Game 1 games, greedy	1300	x17674
1942H	Farmer John's Favorite Intern data structures, dp, flows, trees	3500	x90
1942G	Bessie and Cards combinatorics, dp, math	2800	x436
1942F	Farmer John's Favorite Function brute force, data structures, implementation, math	2700	x688
1942E	Farm Game combinatorics, games	2300	x1655
1942D	Learning to Paint binary search, data structures, dfs and similar, dp, greedy, implementation, sortings	2100	x2756
1942C2	Bessie's Birthday Cake (Hard Version) geometry, greedy, math	1700	x6092
1942C1	Bessie's Birthday Cake (Easy Version) geometry, greedy, math	1300	x10839
1942B	Bessie and MEX constructive algorithms, math	1100	x13760
1942A	Farmer John's Challenge constructive algorithms, math	800	x17133
1941G	Rudolf and Subway constructive algorithms, dfs and similar, graphs, shortest paths	2000	x3473
1941F	Rudolf and Imbalance binary search, greedy, sortings, two pointers	1800	x5927
1941E	Rudolf and k Bridges binary search, data structures, dp, two pointers	1600	x9566
1941D	Rudolf and the Ball Game dfs and similar, dp, implementation	1200	x18243
1941C	Rudolf and the Ugly String dp, greedy, strings	900	x33028
1941B	Rudolf and 121 brute force, dp, greedy, math	1000	x29517