Problemset - Codeforces

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Codeforces Round 945 (Div. 2)
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Problems

#	Name
1971F	Circle Perimeter binary search, brute force, dfs and similar, geometry, implementation, math		x5222
1971D	Binary Cut greedy, implementation, sortings, strings		x16704
1971C	Clock and Strings implementation		x21355
1971B	Different String implementation, strings		x24669
1971A	My First Sorting Problem implementation, sortings		x29834
1970F3	Playing Quidditch (Hard) implementation	2300	x214
1970F2	Playing Quidditch (Medium) implementation	2300	x222
1970F1	Playing Quidditch (Easy) implementation	2300	x292
1970A1	Balanced Shuffle (Easy) implementation, sortings	1000	x1835
1969F	Card Pairing dp, greedy, hashing, implementation	3000	x105
1969C	Minimizing the Sum dp, implementation	1700	x5849
1969A	Two Friends constructive algorithms, implementation, math	800	x15410
1967F	Next and Prev brute force, data structures, implementation	3200	x27
1967D	Long Way to be Non-decreasing binary search, dfs and similar, graphs, implementation, shortest paths, two pointers	2800	x409
1967A	Permutation Counting binary search, greedy, implementation, math, sortings	1400	x8747
1966B	Rectangle Filling constructive algorithms, implementation	1100	x11187
1957B	A BIT of a Construction bitmasks, constructive algorithms, greedy, implementation	1100	x14842
1956E2	Nene vs. Monsters (Hard Version) brute force, greedy, implementation, math	2700	x657
1956E1	Nene vs. Monsters (Easy Version) brute force, implementation, math	2500	x1205
1956D	Nene and the Mex Operator bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math	2000	x3196
1955G	GCD on a grid brute force, dfs and similar, dp, implementation, math, number theory	1900	x3449
1955E	Long Inversions brute force, greedy, implementation, sortings	1700	x7140
1955C	Inhabitant of the Deep Sea greedy, implementation, math	1300	x17789
1955B	Progressive Square constructive algorithms, data structures, implementation, sortings	1000	x23779
1954E	Chain Reaction binary search, data structures, dsu, greedy, implementation, math, number theory	2200	x1787
1954B	Make It Ugly implementation, math	1200	x15434
1952J	Help, what does it mean to be "Based" brute force, constructive algorithms, expression parsing, implementation, sortings		x692
1952H	Palindrome implementation, strings		x354
1952D	Are You a Procrastinator? implementation		x4161
1951E	No Palindromes brute force, constructive algorithms, divide and conquer, greedy, hashing, implementation, math, strings	2000	x3013
1950G	Shuffling Songs bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings	1900	x3498
1950F	0, 1, 2, Tree! bitmasks, brute force, greedy, implementation, trees	1700	x7614
1950E	Nearly Shortest Repeating Substring brute force, implementation, number theory, strings	1500	x12001
1950D	Product of Binary Decimals brute force, dp, implementation, number theory	1100	x20366
1950C	Clock Conversion implementation, math	800	x35149
1950B	Upscaling implementation	800	x33585
1950A	Stair, Peak, or Neither? implementation	800	x44094
1949J	Amanda the Amoeba graphs, implementation, trees, two pointers	2600	x314
1948E	Clique Partition brute force, constructive algorithms, graphs, greedy, implementation	2100	x2628
1948B	Array Fix brute force, dp, greedy, implementation	1100	x20486
1946D	Birthday Gift bitmasks, brute force, constructive algorithms, greedy, implementation	1900	x4030
1946C	Tree Cutting binary search, dp, greedy, implementation, trees	1600	x9119
1946A	Median of an Array greedy, implementation, sortings	800	x23536
1945G	Cook and Porridge binary search, constructive algorithms, data structures, implementation	2500	x625
1943B	Non-Palindromic Substring hashing, implementation, math, strings	2000	x3294
1942F	Farmer John's Favorite Function brute force, data structures, implementation, math	2700	x558
1942D	Learning to Paint binary search, data structures, dfs and similar, dp, greedy, implementation, sortings	2100	x2423
1941D	Rudolf and the Ball Game dfs and similar, dp, implementation	1200	x16635
1940B	Three Arrays *special problem, constructive algorithms, implementation, sortings		x174
1937B	Binary Path dp, greedy, implementation	1300	x13103
1937A	Shuffle Party implementation, math	800	x21462
1936C	Pokémon Arena data structures, graphs, greedy, implementation, shortest paths, sortings	2400	x1097
1936B	Pinball binary search, data structures, implementation, math, two pointers	2000	x2453
1935F	Andrey's Tree binary search, constructive algorithms, data structures, dfs and similar, dsu, greedy, implementation, trees	2800	x392
1935D	Exam in MAC binary search, combinatorics, implementation, math	1800	x7337
1933E	Turtle vs. Rabbit Race: Optimal Trainings binary search, implementation, math, ternary search	1500	x9725
1933C	Turtle Fingers: Count the Values of k brute force, implementation, math, number theory	1100	x20512
1933B	Turtle Math: Fast Three Task implementation, math, number theory	800	x29966
1932E	Final Countdown implementation, math, number theory	1600	x6810
1932D	Card Game greedy, implementation	1400	x9914
1932C	LR-remainders brute force, data structures, implementation, math, two pointers	1400	x13703
1932A	Thorns and Coins dp, greedy, implementation	800	x26759
1930D2	Sum over all Substrings (Hard Version) bitmasks, divide and conquer, dp, dsu, greedy, implementation, strings	2100	x2368
1928F	Digital Patterns combinatorics, data structures, implementation, math	2900	x210
1927F	Microcycle data structures, dfs and similar, dsu, graphs, greedy, implementation, sortings, trees	1900	x3808
1926G	Vlad and Trouble at MIT dfs and similar, dp, flows, graphs, greedy, implementation, trees	1900	x2963
1926F	Vlad and Avoiding X bitmasks, brute force, dfs and similar, dp, implementation	2200	x1495
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x10067
1926C	Vlad and a Sum of Sum of Digits dp, implementation	1200	x23253
1926B	Vlad and Shapes geometry, implementation	800	x29863
1926A	Vlad and the Best of Five implementation	800	x42191
1924B	Space Harbour data structures, implementation, math, sortings	2100	x2280
1923F	Shrink-Reverse binary search, brute force, greedy, hashing, implementation, string suffix structures, strings	2800	x332
1923B	Monsters Attack! dp, greedy, implementation	1100	x16167
1923A	Moving Chips greedy, implementation	800	x23262
1922D	Berserk Monsters brute force, data structures, dsu, implementation, math	1900	x5231
1922C	Closest Cities greedy, implementation, math	1300	x16883
1922A	Tricky Template constructive algorithms, implementation, strings	800	x25880
1921G	Mischievous Shooter brute force, data structures, divide and conquer, dp, implementation	2200	x1128
1921F	Sum of Progression brute force, data structures, dp, implementation, math	1900	x3456
1921B	Arranging Cats greedy, implementation	800	x32012
1920D	Array Repetition binary search, brute force, dsu, implementation, math	1900	x5098
1919E	Counting Prefixes combinatorics, constructive algorithms, dp, implementation, math	2600	x777
1918F	Caterpillar on a Tree dfs and similar, graphs, greedy, implementation, sortings, trees	2500	x774
1918E	ace5 and Task Order constructive algorithms, divide and conquer, implementation, interactive, probabilities, sortings	2200	x1556
1918D	Blocking Elements binary search, data structures, dp, implementation, two pointers	1900	x4272
1918C	XOR-distance bitmasks, greedy, implementation, math	1400	x12574
1918B	Minimize Inversions constructive algorithms, data structures, greedy, implementation, sortings	900	x22141
1918A	Brick Wall constructive algorithms, greedy, implementation, math	800	x28766
1917D	Yet Another Inversions Problem combinatorics, data structures, dp, implementation, math, number theory	2300	x1658
1917C	Watering an Array brute force, greedy, implementation, math	1600	x9400
1916C	Training Before the Olympiad constructive algorithms, games, greedy, implementation, math	1200	x16688
1916A	2023 constructive algorithms, implementation, math, number theory	800	x24563
1915G	Bicycles graphs, greedy, implementation, shortest paths, sortings	1800	x5437
1915D	Unnatural Language Processing greedy, implementation, strings	900	x27772
1915C	Can I Square? binary search, implementation	800	x37668
1915B	Not Quite Latin Square bitmasks, brute force, implementation	800	x38646
1915A	Odd One Out bitmasks, implementation	800	x49912
1914D	Three Activities brute force, dp, greedy, implementation, sortings	1200	x18214
1914A	Problemsolving Log implementation, strings	800	x29780

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