Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round (Div. 2)
5 days
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

constructive algorithms

Add tag

Problems

#	Name
1984G	Magic Trick II constructive algorithms, implementation, sortings	3200	x162
1984A	Strange Splitting constructive algorithms	800	x18481
1981D	Turtle and Multiplication constructive algorithms, dfs and similar, graphs, number theory	2400	x1242
1981C	Turtle and an Incomplete Sequence bitmasks, brute force, constructive algorithms, greedy, implementation, math	1800	x4214
1980E	Permutation of Rows and Columns constructive algorithms, data structures, greedy, hashing, implementation, math, matrices, sortings	1600	x8656
1980C	Sofia and the Lost Operations constructive algorithms, greedy	1300	x16091
1979F	Kostyanych's Theorem brute force, constructive algorithms, graphs, interactive	2900	x227
1979E	Manhattan Triangle binary search, constructive algorithms, data structures, geometry, implementation, two pointers	2400	x1111
1979D	Fixing a Binary String bitmasks, brute force, constructive algorithms, dp, greedy, hashing, strings	1800	x5437
1979C	Earning on Bets binary search, combinatorics, constructive algorithms, number theory	1200	x16137
1978C	Manhattan Permutations constructive algorithms, data structures, greedy, implementation, math	1300	x11914
1978A	Alice and Books constructive algorithms, greedy, sortings	800	x21512
1977E	Tensor constructive algorithms, graphs, interactive	2600	x532
1977B	Binary Colouring bitmasks, constructive algorithms, greedy, math	1100	x15797
1974D	Ingenuity-2 constructive algorithms, greedy, implementation	1400	x12894
1973C	Cat, Fox and Double Maximum constructive algorithms, greedy, implementation, math, sortings	1700	x7261
1970D2	Arithmancy (Medium) constructive algorithms, interactive, probabilities, strings	2600	x162
1970D1	Arithmancy (Easy) brute force, constructive algorithms, interactive, strings	2100	x487
1970B3	Exact Neighbours (Hard) constructive algorithms	2300	x377
1970B2	Exact Neighbours (Medium) constructive algorithms	2100	x609
1970B1	Exact Neighbours (Easy) constructive algorithms	1900	x865
1970A3	Balanced Unshuffle (Hard) constructive algorithms, trees	2400	x379
1970A2	Balanced Unshuffle (Medium) brute force, constructive algorithms, trees	2400	x378
1969B	Shifts and Sorting constructive algorithms, greedy	1000	x16887
1969A	Two Friends constructive algorithms, implementation, math	800	x18370
1968E	Cells Arrangement constructive algorithms	1600	x9189
1968C	Assembly via Remainders constructive algorithms, number theory	1000	x22368
1966B	Rectangle Filling constructive algorithms, implementation	1100	x13492
1966A	Card Exchange constructive algorithms, games, greedy	800	x16403
1965E	Connected Cubes constructive algorithms, games	3100	x207
1965D	Missing Subarray Sum constructive algorithms	2900	x315
1965C	Folding Strip constructive algorithms, greedy, strings	2300	x1620
1965B	Missing Subsequence Sum bitmasks, constructive algorithms, greedy, number theory	1800	x5835
1958E	Yet Another Permutation Constructive *special problem, constructive algorithms	1900	x220
1957B	A BIT of a Construction bitmasks, constructive algorithms, greedy, implementation	1100	x16525
1957A	Stickogon constructive algorithms, greedy	800	x21709
1956F	Nene and the Passing Game constructive algorithms, data structures, dsu, graphs, sortings	3000	x304
1956D	Nene and the Mex Operator bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math	2000	x3518
1956C	Nene's Magical Matrix constructive algorithms, greedy, math	1600	x11747
1955H	The Most Reckless Defense bitmasks, brute force, constructive algorithms, dp, flows, graph matchings, shortest paths	2300	x1123
1955B	Progressive Square constructive algorithms, data structures, implementation, sortings	1000	x25640
1954A	Painting the Ribbon constructive algorithms, greedy, math	900	x22141
1952J	Help, what does it mean to be "Based" brute force, constructive algorithms, expression parsing, implementation, sortings		x722
1951I	Growing Trees binary search, constructive algorithms, flows, graphs, greedy	3200	x70
1951F	Inversion Composition constructive algorithms, data structures, greedy	2500	x696
1951E	No Palindromes brute force, constructive algorithms, divide and conquer, greedy, hashing, implementation, math, strings	2000	x3272
1951D	Buying Jewels constructive algorithms, greedy, math	2000	x5045
1951A	Dual Trigger constructive algorithms, greedy, math	900	x18124
1949K	Make Triangle constructive algorithms, math	2800	x263
1949D	Funny or Scary? constructive algorithms	2600	x326
1948E	Clique Partition brute force, constructive algorithms, graphs, greedy, implementation	2100	x2753
1948C	Arrow Path brute force, constructive algorithms, dfs and similar, dp, graphs, shortest paths	1300	x15404
1948A	Special Characters brute force, constructive algorithms	800	x27290
1946D	Birthday Gift bitmasks, brute force, constructive algorithms, greedy, implementation	1900	x4292
1945G	Cook and Porridge binary search, constructive algorithms, data structures, implementation	2500	x676
1945E	Binary Search binary search, constructive algorithms, greedy	1700	x7451
1944B	Equal XOR bitmasks, constructive algorithms	1100	x15173
1943C	Tree Compass constructive algorithms, dfs and similar, greedy, trees	2300	x1908
1942B	Bessie and MEX constructive algorithms, math	1100	x13027
1942A	Farmer John's Challenge constructive algorithms, math	800	x16436
1941G	Rudolf and Subway constructive algorithms, dfs and similar, graphs, shortest paths	2000	x3193
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	x6884
1935F	Andrey's Tree binary search, constructive algorithms, data structures, dfs and similar, dsu, greedy, implementation, trees	2800	x412
1935C	Messenger in MAC binary search, brute force, constructive algorithms, data structures, dp, greedy, sortings	1800	x7513
1935B	Informatics in MAC constructive algorithms	1200	x17318
1935A	Entertainment in MAC constructive algorithms, strings	800	x26520
1934E	Weird LCM Operations brute force, constructive algorithms, number theory	3000	x199
1934D1	XOR Break --- Solo Version bitmasks, constructive algorithms, greedy	2100	x3222
1934C	Find a Mine binary search, constructive algorithms, geometry, greedy, interactive, math	1700	x6288
1933G	Turtle Magic: Royal Turtle Shell Pattern bitmasks, brute force, combinatorics, constructive algorithms, dfs and similar, math	2300	x911
1933D	Turtle Tenacity: Continual Mods constructive algorithms, greedy, math, number theory, sortings	1200	x18743
1930H	Interactive Mex Tree constructive algorithms, dfs and similar, interactive, trees	3300	x143
1930C	Lexicographically Largest binary search, constructive algorithms, data structures, greedy, sortings	1700	x6640
1930B	Permutation Printing brute force, constructive algorithms, math	1000	x14281
1929C	Sasha and the Casino binary search, brute force, constructive algorithms, games, greedy, math	1400	x13833
1929B	Sasha and the Drawing constructive algorithms, greedy, math	800	x24354
1929A	Sasha and the Beautiful Array constructive algorithms, greedy, math, sortings	800	x30021
1928E	Modular Sequence brute force, constructive algorithms, dp, graphs, greedy, math, number theory	2300	x1601
1927E	Klever Permutation constructive algorithms, math, two pointers	1400	x13026
1927B	Following the String constructive algorithms, greedy, strings	900	x31409
1925A	We Got Everything Covered! constructive algorithms, greedy, strings	800	x27828
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	x12909
1923D	Slimes binary search, constructive algorithms, data structures, greedy, two pointers	1800	x6214
1923C	Find B constructive algorithms, greedy	1400	x13903
1922E	Increasing Subsequences bitmasks, constructive algorithms, divide and conquer, greedy, math	1800	x7283
1922B	Forming Triangles combinatorics, constructive algorithms, math, sortings	1200	x19624
1922A	Tricky Template constructive algorithms, implementation, strings	800	x26322
1919G	Tree LGM constructive algorithms, divide and conquer, games, trees	3500	x175
1919E	Counting Prefixes combinatorics, constructive algorithms, dp, implementation, math	2600	x801
1919D	01 Tree constructive algorithms, data structures, dsu, greedy, sortings, trees	2100	x3675
1918G	Permutation of Given constructive algorithms, math	2700	x434
1918E	ace5 and Task Order constructive algorithms, divide and conquer, implementation, interactive, probabilities, sortings	2200	x1620
1918B	Minimize Inversions constructive algorithms, data structures, greedy, implementation, sortings	900	x22752
1918A	Brick Wall constructive algorithms, greedy, implementation, math	800	x29306

←