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Codeforces Round (Div. 2)
3 days
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combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
constructive algorithms
data structures
dfs and similar
divide and conquer
dp
dsu
expression parsing
fft
flows
games
geometry
graph matchings
graphs
greedy
hashing
implementation
interactive
math
matrices
meet-in-the-middle
number theory
probabilities
schedules
shortest paths
sortings
string suffix structures
strings
ternary search
trees
two pointers
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Status
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Custom test
Problems
#
Name
1986E
Beautiful Array
greedy
,
math
,
number theory
,
sortings
1700
x6373
1985H1
Maximize the Largest Component (Easy Version)
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
implementation
1700
x4212
1984C2
Magnitude (Hard Version)
combinatorics
,
dp
,
greedy
,
math
1700
x6101
1982D
Beauty of the mountains
brute force
,
data structures
,
implementation
,
math
,
number theory
1700
x5379
1975D
Paint the Tree
brute force
,
dfs and similar
,
dp
,
greedy
,
shortest paths
,
trees
1700
x5026
1973C
Cat, Fox and Double Maximum
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
1700
x7292
1971G
XOUR
data structures
,
dsu
,
sortings
1700
x8007
1970C2
Game on Tree (Medium)
dfs and similar
,
dp
,
games
,
trees
1700
x1922
1969C
Minimizing the Sum
dp
,
implementation
1700
x7406
1955E
Long Inversions
brute force
,
greedy
,
implementation
,
sortings
1700
x7826
1950F
0, 1, 2, Tree!
bitmasks
,
brute force
,
greedy
,
implementation
,
trees
1700
x8309
1948D
Tandem Repeats?
brute force
,
strings
,
two pointers
1700
x8666
1945E
Binary Search
binary search
,
constructive algorithms
,
greedy
1700
x7461
1942C2
Bessie's Birthday Cake (Hard Version)
geometry
,
greedy
,
math
1700
x5785
1936A
Bitwise Operation Wizard
bitmasks
,
constructive algorithms
,
greedy
,
interactive
,
math
1700
x6892
1934C
Find a Mine
binary search
,
constructive algorithms
,
geometry
,
greedy
,
interactive
,
math
1700
x6298
1931F
Chat Screenshots
combinatorics
,
dfs and similar
,
graphs
1700
x7343
1930C
Lexicographically Largest
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
1700
x6654
1916D
Mathematical Problem
brute force
,
constructive algorithms
,
geometry
,
math
1700
x8119
1906M
Triangle Construction
greedy
,
math
1700
x2438
1903D1
Maximum And Queries (easy version)
binary search
,
bitmasks
,
brute force
,
greedy
1700
x5308
1901D
Yet Another Monster Fight
binary search
,
dp
,
greedy
,
implementation
,
math
1700
x6448
1898C
Colorful Grid
constructive algorithms
1700
x5137
1896D
Ones and Twos
binary search
,
data structures
,
divide and conquer
,
math
,
two pointers
1700
x5404
1893B
Neutral Tonality
constructive algorithms
,
greedy
,
sortings
,
two pointers
1700
x8333
1889B
Doremy's Connecting Plan
constructive algorithms
,
greedy
,
math
,
sortings
1700
x6986
1884C
Medium Design
brute force
,
data structures
,
dp
,
greedy
,
sortings
1700
x5709
1883E
Look Back
bitmasks
,
greedy
1700
x7463
1881F
Minimum Maximum Distance
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
1700
x6309
1879D
Sum of XOR Functions
bitmasks
,
combinatorics
,
divide and conquer
,
dp
,
math
1700
x6949
1873H
Mad City
dfs and similar
,
dsu
,
games
,
graphs
,
shortest paths
,
trees
1700
x6880
1868B1
Candy Party (Easy Version)
bitmasks
,
constructive algorithms
,
graphs
,
greedy
,
implementation
,
math
1700
x6677
1864D
Matrix Cascade
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
math
1700
x6502
1850H
The Third Letter
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
1700
x7797
1849D
Array Painting
constructive algorithms
,
greedy
,
two pointers
1700
x8078
1835A
k-th equality
brute force
,
implementation
,
math
1700
x7591
1833F
Ira and Flamenco
combinatorics
,
constructive algorithms
,
data structures
,
implementation
,
math
,
sortings
,
two pointers
1700
x6966
1829H
Don't Blame Me
bitmasks
,
combinatorics
,
dp
,
math
1700
x7343
1826D
Running Miles
brute force
,
dp
,
greedy
1700
x8998
1822G1
Magic Triples (Easy Version)
brute force
,
data structures
,
math
,
number theory
1700
x6776
1822F
Gardening Friends
brute force
,
dfs and similar
,
dp
,
graphs
,
trees
1700
x5784
1814B
Long Legs
brute force
,
math
1700
x9728
1810D
Climbing the Tree
binary search
,
math
1700
x7245
1807F
Bouncy Ball
brute force
,
dfs and similar
,
implementation
1700
x6032
1799C
Double Lexicographically Minimum
greedy
,
strings
1700
x5635
1798C
Candy Store
greedy
,
math
,
number theory
1700
x7946
1792D
Fixed Prefix Permutations
binary search
,
bitmasks
,
data structures
,
hashing
,
math
,
sortings
1700
x6016
1783C
Yet Another Tournament
binary search
,
greedy
,
sortings
1700
x9022
1779D
Boris and His Amazing Haircut
constructive algorithms
,
data structures
,
dp
,
dsu
,
greedy
,
sortings
1700
x7649
1777C
Quiz Master
binary search
,
math
,
number theory
,
sortings
,
two pointers
1700
x8078
1776F
Train Splitting
constructive algorithms
,
graphs
,
greedy
1700
x3314
1772E
Permutation Game
games
1700
x6559
1770C
Koxia and Number Theory
brute force
,
chinese remainder theorem
,
math
,
number theory
1700
x8392
1765D
Watch the Videos
binary search
,
constructive algorithms
,
two pointers
1700
x4010
1760G
SlavicG's Favorite Problem
bitmasks
,
dfs and similar
,
graphs
1700
x7088
1743D
Problem with Random Tests
brute force
,
dp
,
greedy
,
probabilities
1700
x7426
1735D
Meta-set
brute force
,
combinatorics
,
data structures
,
hashing
,
math
1700
x5382
1731D
Valiant's New Map
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x6902
1731C
Even Subarrays
bitmasks
,
brute force
,
hashing
,
math
,
number theory
1700
x9193
1722F
L-shapes
dfs and similar
,
implementation
1700
x6686
1715C
Monoblock
combinatorics
,
data structures
,
implementation
,
math
1700
x8464
1714G
Path Prefixes
binary search
,
data structures
,
dfs and similar
,
trees
1700
x7326
1709D
Rorororobot
binary search
,
data structures
,
greedy
,
math
1700
x8212
1706D1
Chopping Carrots (Easy Version)
binary search
,
brute force
,
constructive algorithms
,
greedy
,
number theory
1700
x6762
1702F
Equate Multisets
constructive algorithms
,
data structures
,
greedy
,
math
,
number theory
1700
x8119
1700C
Helping the Nature
constructive algorithms
,
data structures
,
greedy
1700
x10630
1699C
The Third Problem
combinatorics
,
constructive algorithms
,
math
1700
x9530
1695C
Zero Path
brute force
,
data structures
,
dp
,
graphs
,
greedy
,
shortest paths
1700
x10615
1693B
Fake Plastic Trees
dfs and similar
,
dp
,
greedy
,
trees
1700
x8201
1692H
Gambling
data structures
,
dp
,
greedy
,
math
1700
x7218
1690F
Shifting String
graphs
,
math
,
number theory
,
strings
1700
x6942
1688C
Manipulating History
constructive algorithms
,
greedy
,
strings
1700
x8011
1687B
Railway System
constructive algorithms
,
graphs
,
greedy
,
interactive
,
sortings
1700
x3527
1684D
Traps
constructive algorithms
,
greedy
,
sortings
1700
x9448
1681D
Required Length
brute force
,
dfs and similar
,
dp
,
hashing
,
shortest paths
1700
x9413
1677B
Tokitsukaze and Meeting
data structures
,
implementation
,
math
1700
x4086
1672D
Cyclic Rotation
constructive algorithms
,
greedy
,
implementation
,
two pointers
1700
x6110
1670D
Very Suspicious
binary search
,
brute force
,
geometry
,
greedy
,
implementation
,
math
1700
x5015
1661C
Water the Trees
binary search
,
greedy
,
math
1700
x9128
1660F1
Promising String (easy version)
brute force
,
implementation
,
math
,
strings
1700
x7098
1658C
Shinju and the Lost Permutation
constructive algorithms
,
math
1700
x9184
1644D
Cross Coloring
data structures
,
implementation
,
math
1700
x7068
1628B
Peculiar Movie Preferences
greedy
,
strings
1700
x11344
1626C
Monsters And Spells
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
math
,
two pointers
1700
x10733
1625C
Road Optimization
dp
1700
x10296
1621C
Hidden Permutations
dfs and similar
,
interactive
,
math
1700
x6803
1619E
MEX and Increments
constructive algorithms
,
data structures
,
dp
,
greedy
,
implementation
,
math
,
sortings
1700
x8829
1618E
Singers' Tour
constructive algorithms
,
math
1700
x7039
1611E1
Escape The Maze (easy version)
dfs and similar
,
greedy
,
shortest paths
,
trees
,
two pointers
1700
x7073
1608C
Game Master
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
two pointers
1700
x6499
1598D
Training Session
combinatorics
,
data structures
,
geometry
,
implementation
,
math
1700
x8481
1594D
The Number of Imposters
constructive algorithms
,
dfs and similar
,
dp
,
dsu
,
graphs
1700
x7225
1592C
Bakry and Partitioning
bitmasks
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
trees
1700
x7747
1583C
Omkar and Determination
data structures
,
dp
1700
x6856
1580A
Portal
brute force
,
data structures
,
dp
,
greedy
,
implementation
1700
x3596
1579F
Array Stabilization (AND version)
brute force
,
graphs
,
math
,
number theory
,
shortest paths
1700
x4650
1579E2
Array Optimization by Deque
data structures
,
greedy
1700
x6504
1578H
Higher Order Functions
implementation
,
strings
1700
x2002
1571E
Fix the String
*special problem
,
bitmasks
,
dp
,
greedy
1700
x331
1562D1
Two Hundred Twenty One (easy version)
data structures
,
dp
,
math
1700
x6238
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