Problemset - Codeforces

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Codeforces Round (Div. 3)
4 days

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Difficulty: —

constructive algorithms

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Problems

#	Name
1984G	Magic Trick II constructive algorithms, implementation, sortings	3200	x190
1984A	Strange Splitting constructive algorithms	800	x18788
1983D	Swap Dilemma constructive algorithms, divide and conquer, greedy, math, sortings		x3943
1983B	Corner Twist constructive algorithms, greedy, implementation, math		x10096
1983A	Array Divisibility constructive algorithms, math		x18144
1981D	Turtle and Multiplication constructive algorithms, dfs and similar, graphs, number theory	2400	x1279
1981C	Turtle and an Incomplete Sequence bitmasks, brute force, constructive algorithms, greedy, implementation, math	1800	x4343
1980E	Permutation of Rows and Columns constructive algorithms, data structures, greedy, hashing, implementation, math, matrices, sortings	1600	x8809
1980C	Sofia and the Lost Operations constructive algorithms, greedy	1300	x16307
1979F	Kostyanych's Theorem brute force, constructive algorithms, graphs, interactive	2900	x235
1979E	Manhattan Triangle binary search, constructive algorithms, data structures, geometry, implementation, two pointers	2400	x1157
1979D	Fixing a Binary String bitmasks, brute force, constructive algorithms, dp, greedy, hashing, strings	1800	x5578
1979C	Earning on Bets binary search, combinatorics, constructive algorithms, number theory	1200	x16428
1978C	Manhattan Permutations constructive algorithms, data structures, greedy, implementation, math	1300	x12340
1978A	Alice and Books constructive algorithms, greedy, sortings	800	x22140
1977E	Tensor constructive algorithms, graphs, interactive	2600	x539
1977B	Binary Colouring bitmasks, constructive algorithms, greedy, math	1100	x15978
1974D	Ingenuity-2 constructive algorithms, greedy, implementation	1400	x13047
1973C	Cat, Fox and Double Maximum constructive algorithms, greedy, implementation, math, sortings	1700	x7343
1970D2	Arithmancy (Medium) constructive algorithms, interactive, probabilities, strings	2600	x164
1970D1	Arithmancy (Easy) brute force, constructive algorithms, interactive, strings	2100	x493
1970B3	Exact Neighbours (Hard) constructive algorithms	2300	x382
1970B2	Exact Neighbours (Medium) constructive algorithms	2100	x618
1970B1	Exact Neighbours (Easy) constructive algorithms	1900	x879
1970A3	Balanced Unshuffle (Hard) constructive algorithms, trees	2400	x384
1970A2	Balanced Unshuffle (Medium) brute force, constructive algorithms, trees	2400	x383
1969B	Shifts and Sorting constructive algorithms, greedy	1000	x17027
1969A	Two Friends constructive algorithms, implementation, math	800	x18488
1968E	Cells Arrangement constructive algorithms	1600	x9261
1968C	Assembly via Remainders constructive algorithms, number theory	1000	x22533
1966B	Rectangle Filling constructive algorithms, implementation	1100	x13626
1966A	Card Exchange constructive algorithms, games, greedy	800	x16541
1965E	Connected Cubes constructive algorithms, games	3100	x207
1965D	Missing Subarray Sum constructive algorithms	2900	x320
1965C	Folding Strip constructive algorithms, greedy, strings	2300	x1642
1965B	Missing Subsequence Sum bitmasks, constructive algorithms, greedy, number theory	1800	x5898
1958E	Yet Another Permutation Constructive *special problem, constructive algorithms	1900	x220
1957B	A BIT of a Construction bitmasks, constructive algorithms, greedy, implementation	1100	x16655
1957A	Stickogon constructive algorithms, greedy	800	x21830
1956F	Nene and the Passing Game constructive algorithms, data structures, dsu, graphs, sortings	3000	x306
1956D	Nene and the Mex Operator bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math	2000	x3543
1956C	Nene's Magical Matrix constructive algorithms, greedy, math	1600	x11823
1955H	The Most Reckless Defense bitmasks, brute force, constructive algorithms, dp, flows, graph matchings, shortest paths	2300	x1136
1955B	Progressive Square constructive algorithms, data structures, implementation, sortings	1000	x25769
1954A	Painting the Ribbon constructive algorithms, greedy, math	900	x22293
1952J	Help, what does it mean to be "Based" brute force, constructive algorithms, expression parsing, implementation, sortings		x723
1951I	Growing Trees binary search, constructive algorithms, flows, graphs, greedy	3200	x70
1951F	Inversion Composition constructive algorithms, data structures, greedy	2500	x700
1951E	No Palindromes brute force, constructive algorithms, divide and conquer, greedy, hashing, implementation, math, strings	2000	x3290
1951D	Buying Jewels constructive algorithms, greedy, math	2000	x5067
1951A	Dual Trigger constructive algorithms, greedy, math	900	x18256
1949K	Make Triangle constructive algorithms, math	2800	x268
1949D	Funny or Scary? constructive algorithms	2600	x332
1948E	Clique Partition brute force, constructive algorithms, graphs, greedy, implementation	2100	x2767
1948C	Arrow Path brute force, constructive algorithms, dfs and similar, dp, graphs, shortest paths	1300	x15476
1948A	Special Characters brute force, constructive algorithms	800	x27363
1946D	Birthday Gift bitmasks, brute force, constructive algorithms, greedy, implementation	1900	x4316
1945G	Cook and Porridge binary search, constructive algorithms, data structures, implementation	2500	x682
1945E	Binary Search binary search, constructive algorithms, greedy	1700	x7483
1944B	Equal XOR bitmasks, constructive algorithms	1100	x15258
1943C	Tree Compass constructive algorithms, dfs and similar, greedy, trees	2300	x1916
1942B	Bessie and MEX constructive algorithms, math	1100	x13088
1942A	Farmer John's Challenge constructive algorithms, math	800	x16495
1941G	Rudolf and Subway constructive algorithms, dfs and similar, graphs, shortest paths	2000	x3216
1940D	Almost Certainly *special problem, constructive algorithms, data structures, sortings		x126
1940B	Three Arrays *special problem, constructive algorithms, implementation, sortings		x181
1940A	Parallel Universes *special problem, constructive algorithms, dfs and similar, dsu, graphs		x81
1939B	Evidence Board *special problem, constructive algorithms, dfs and similar, graphs, trees		x214
1939A	Draw Polygon Lines *special problem, constructive algorithms, dp, geometry, interactive		x20
1936A	Bitwise Operation Wizard bitmasks, constructive algorithms, greedy, interactive, math	1700	x6908
1935F	Andrey's Tree binary search, constructive algorithms, data structures, dfs and similar, dsu, greedy, implementation, trees	2800	x413
1935C	Messenger in MAC binary search, brute force, constructive algorithms, data structures, dp, greedy, sortings	1800	x7554
1935B	Informatics in MAC constructive algorithms	1200	x17399
1935A	Entertainment in MAC constructive algorithms, strings	800	x26610
1934E	Weird LCM Operations brute force, constructive algorithms, number theory	3000	x201
1934D1	XOR Break --- Solo Version bitmasks, constructive algorithms, greedy	2100	x3229
1934C	Find a Mine binary search, constructive algorithms, geometry, greedy, interactive, math	1700	x6324
1933G	Turtle Magic: Royal Turtle Shell Pattern bitmasks, brute force, combinatorics, constructive algorithms, dfs and similar, math	2300	x913
1933D	Turtle Tenacity: Continual Mods constructive algorithms, greedy, math, number theory, sortings	1200	x18848
1930H	Interactive Mex Tree constructive algorithms, dfs and similar, interactive, trees	3300	x144
1930C	Lexicographically Largest binary search, constructive algorithms, data structures, greedy, sortings	1700	x6669
1930B	Permutation Printing brute force, constructive algorithms, math	1000	x14341
1929C	Sasha and the Casino binary search, brute force, constructive algorithms, games, greedy, math	1400	x13900
1929B	Sasha and the Drawing constructive algorithms, greedy, math	800	x24421
1929A	Sasha and the Beautiful Array constructive algorithms, greedy, math, sortings	800	x30131
1928E	Modular Sequence brute force, constructive algorithms, dp, graphs, greedy, math, number theory	2300	x1606
1927E	Klever Permutation constructive algorithms, math, two pointers	1400	x13085
1927B	Following the String constructive algorithms, greedy, strings	900	x31512
1925A	We Got Everything Covered! constructive algorithms, greedy, strings	800	x27873
1924F	Anti-Proxy Attendance constructive algorithms, dp, interactive, ternary search	3500	x139
1924A	Did We Get Everything Covered? constructive algorithms, dp, greedy, shortest paths, strings	1500	x12975
1923D	Slimes binary search, constructive algorithms, data structures, greedy, two pointers	1800	x6252
1923C	Find B constructive algorithms, greedy	1400	x13984
1922E	Increasing Subsequences bitmasks, constructive algorithms, divide and conquer, greedy, math	1800	x7303
1922B	Forming Triangles combinatorics, constructive algorithms, math, sortings	1200	x19671
1922A	Tricky Template constructive algorithms, implementation, strings	800	x26362
1919G	Tree LGM constructive algorithms, divide and conquer, games, trees	3500	x175
1919E	Counting Prefixes combinatorics, constructive algorithms, dp, implementation, math	2600	x804
1919D	01 Tree constructive algorithms, data structures, dsu, greedy, sortings, trees	2100	x3683
1918G	Permutation of Given constructive algorithms, math	2700	x435

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