Problemset - Codeforces

→ Pay attention

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

*has extra registration

→ Filter Problems

Difficulty: —

constructive algorithms

Add tag

Problems

#	Name
1992E	Novice's Mistake brute force, constructive algorithms, math, strings	1700	x5368
1992C	Gorilla and Permutation constructive algorithms, math	900	x21169
1992A	Only Pluses brute force, constructive algorithms, greedy, math, sortings	800	x28577
1984G	Magic Trick II constructive algorithms, implementation, sortings	3200	x195
1984A	Strange Splitting constructive algorithms	800	x19100
1983D	Swap Dilemma constructive algorithms, data structures, divide and conquer, greedy, math, sortings	1700	x6212
1983B	Corner Twist constructive algorithms, greedy, implementation, math	1200	x13189
1983A	Array Divisibility constructive algorithms, math	800	x21756
1981D	Turtle and Multiplication constructive algorithms, dfs and similar, graphs, number theory	2400	x1315
1981C	Turtle and an Incomplete Sequence bitmasks, brute force, constructive algorithms, greedy, implementation, math	1800	x4444
1980E	Permutation of Rows and Columns constructive algorithms, data structures, greedy, hashing, implementation, math, matrices, sortings	1600	x8984
1980C	Sofia and the Lost Operations constructive algorithms, greedy	1300	x16628
1979F	Kostyanych's Theorem brute force, constructive algorithms, graphs, interactive	2900	x243
1979E	Manhattan Triangle binary search, constructive algorithms, data structures, geometry, implementation, two pointers	2400	x1184
1979D	Fixing a Binary String bitmasks, brute force, constructive algorithms, dp, greedy, hashing, strings	1800	x5686
1979C	Earning on Bets binary search, combinatorics, constructive algorithms, number theory	1200	x16638
1978C	Manhattan Permutations constructive algorithms, data structures, greedy, implementation, math	1300	x12661
1978A	Alice and Books constructive algorithms, greedy, sortings	800	x22601
1977E	Tensor constructive algorithms, graphs, interactive	2600	x554
1977B	Binary Colouring bitmasks, constructive algorithms, greedy, math	1100	x16130
1974D	Ingenuity-2 constructive algorithms, greedy, implementation	1400	x13216
1973C	Cat, Fox and Double Maximum constructive algorithms, greedy, implementation, math, sortings	1700	x7438
1970D2	Arithmancy (Medium) constructive algorithms, interactive, probabilities, strings	2600	x164
1970D1	Arithmancy (Easy) brute force, constructive algorithms, interactive, strings	2100	x500
1970B3	Exact Neighbours (Hard) constructive algorithms	2300	x388
1970B2	Exact Neighbours (Medium) constructive algorithms	2100	x633
1970B1	Exact Neighbours (Easy) constructive algorithms	1900	x899
1970A3	Balanced Unshuffle (Hard) constructive algorithms, trees	2400	x385
1970A2	Balanced Unshuffle (Medium) brute force, constructive algorithms, trees	2400	x383
1969B	Shifts and Sorting constructive algorithms, greedy	1000	x17136
1969A	Two Friends constructive algorithms, implementation, math	800	x18588
1968E	Cells Arrangement constructive algorithms	1600	x9348
1968C	Assembly via Remainders constructive algorithms, number theory	1000	x22800
1966B	Rectangle Filling constructive algorithms, implementation	1100	x13734
1966A	Card Exchange constructive algorithms, games, greedy	800	x16637
1965E	Connected Cubes constructive algorithms, games	3100	x213
1965D	Missing Subarray Sum constructive algorithms	2900	x329
1965C	Folding Strip constructive algorithms, greedy, strings	2300	x1662
1965B	Missing Subsequence Sum bitmasks, constructive algorithms, greedy, number theory	1800	x5946
1958E	Yet Another Permutation Constructive *special problem, constructive algorithms	1900	x220
1957B	A BIT of a Construction bitmasks, constructive algorithms, greedy, implementation	1100	x16734
1957A	Stickogon constructive algorithms, greedy	800	x21936
1956F	Nene and the Passing Game constructive algorithms, data structures, dsu, graphs, sortings	3000	x308
1956D	Nene and the Mex Operator bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math	2000	x3560
1956C	Nene's Magical Matrix constructive algorithms, greedy, math	1600	x11896
1955H	The Most Reckless Defense bitmasks, brute force, constructive algorithms, dp, flows, graph matchings, shortest paths	2300	x1147
1955B	Progressive Square constructive algorithms, data structures, implementation, sortings	1000	x25935
1954A	Painting the Ribbon constructive algorithms, greedy, math	900	x22412
1952J	Help, what does it mean to be "Based" brute force, constructive algorithms, expression parsing, implementation, sortings		x726
1951I	Growing Trees binary search, constructive algorithms, flows, graphs, greedy	3200	x70
1951F	Inversion Composition constructive algorithms, data structures, greedy	2500	x714
1951E	No Palindromes brute force, constructive algorithms, divide and conquer, greedy, hashing, implementation, math, strings	2000	x3314
1951D	Buying Jewels constructive algorithms, greedy, math	2000	x5087
1951A	Dual Trigger constructive algorithms, greedy, math	900	x18354
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	x2788
1948C	Arrow Path brute force, constructive algorithms, dfs and similar, dp, graphs, shortest paths	1300	x15559
1948A	Special Characters brute force, constructive algorithms	800	x27436
1946D	Birthday Gift bitmasks, brute force, constructive algorithms, greedy, implementation	1900	x4350
1945G	Cook and Porridge binary search, constructive algorithms, data structures, implementation	2500	x686
1945E	Binary Search binary search, constructive algorithms, greedy	1700	x7528
1944B	Equal XOR bitmasks, constructive algorithms	1100	x15334
1943C	Tree Compass constructive algorithms, dfs and similar, greedy, trees	2300	x1925
1942B	Bessie and MEX constructive algorithms, math	1100	x13145
1942A	Farmer John's Challenge constructive algorithms, math	800	x16553
1941G	Rudolf and Subway constructive algorithms, dfs and similar, graphs, shortest paths	2000	x3235
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	x6932
1935F	Andrey's Tree binary search, constructive algorithms, data structures, dfs and similar, dsu, greedy, implementation, trees	2800	x415
1935C	Messenger in MAC binary search, brute force, constructive algorithms, data structures, dp, greedy, sortings	1800	x7585
1935B	Informatics in MAC constructive algorithms	1200	x17460
1935A	Entertainment in MAC constructive algorithms, strings	800	x26678
1934E	Weird LCM Operations brute force, constructive algorithms, number theory	3000	x203
1934D1	XOR Break --- Solo Version bitmasks, constructive algorithms, greedy	2100	x3244
1934C	Find a Mine binary search, constructive algorithms, geometry, greedy, interactive, math	1700	x6351
1933G	Turtle Magic: Royal Turtle Shell Pattern bitmasks, brute force, combinatorics, constructive algorithms, dfs and similar, math	2300	x915
1933D	Turtle Tenacity: Continual Mods constructive algorithms, greedy, math, number theory, sortings	1200	x18965
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	x6694
1930B	Permutation Printing brute force, constructive algorithms, math	1000	x14386
1929C	Sasha and the Casino binary search, brute force, constructive algorithms, games, greedy, math	1400	x13960
1929B	Sasha and the Drawing constructive algorithms, greedy, math	800	x24483
1929A	Sasha and the Beautiful Array constructive algorithms, greedy, math, sortings	800	x30202
1928E	Modular Sequence brute force, constructive algorithms, dp, graphs, greedy, math, number theory	2300	x1609
1927E	Klever Permutation constructive algorithms, math, two pointers	1400	x13152
1927B	Following the String constructive algorithms, greedy, strings	900	x31631
1925A	We Got Everything Covered! constructive algorithms, greedy, strings	800	x27937
1924F	Anti-Proxy Attendance constructive algorithms, dp, interactive, ternary search	3500	x141
1924A	Did We Get Everything Covered? constructive algorithms, dp, greedy, shortest paths, strings	1500	x13017
1923D	Slimes binary search, constructive algorithms, data structures, greedy, two pointers	1800	x6278
1923C	Find B constructive algorithms, greedy	1400	x14054
1922E	Increasing Subsequences bitmasks, constructive algorithms, divide and conquer, greedy, math	1800	x7318
1922B	Forming Triangles combinatorics, constructive algorithms, math, sortings	1200	x19729
1922A	Tricky Template constructive algorithms, implementation, strings	800	x26390
1919G	Tree LGM constructive algorithms, divide and conquer, games, trees	3500	x176

←