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Codeforces Round 952 (Div. 4)
11:44:55
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Difficulty:
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dp
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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Problems
#
Name
1984C2
Magnitude (Hard Version)
combinatorics
,
dp
,
greedy
1700
x4483
1984C1
Magnitude (Easy Version)
dp
,
greedy
,
math
1300
x9769
1977C
Nikita and LCM
brute force
,
data structures
,
dp
,
greedy
,
math
,
number theory
,
sortings
1900
x5225
1976C
Job Interview
binary search
,
dp
,
greedy
,
implementation
,
two pointers
1600
x7871
1975D
Paint the Tree
brute force
,
dfs and similar
,
dp
,
greedy
,
shortest paths
,
trees
1700
x4617
1974E
Money Buys Happiness
dp
1800
x6146
1970E2
Trails (Medium)
dp
,
matrices
2000
x832
1970E1
Trails (Easy)
dp
1800
x1311
1970C3
Game on Tree (Hard)
dfs and similar
,
dp
,
games
,
trees
1900
x970
1970C2
Game on Tree (Medium)
dfs and similar
,
dp
,
games
,
trees
1700
x1673
1969C
Minimizing the Sum
dp
,
implementation
1700
x6927
1968G1
Division + LCP (easy version)
binary search
,
data structures
,
dp
,
hashing
,
string suffix structures
,
strings
1900
x3499
1957D
A BIT of an Inequality
bitmasks
,
brute force
,
dp
,
math
1900
x3908
1957C
How Does the Rook Move?
combinatorics
,
dp
,
math
1600
x8274
1956D
Nene and the Mex Operator
bitmasks
,
brute force
,
constructive algorithms
,
divide and conquer
,
dp
,
greedy
,
implementation
,
math
2000
x3420
1955G
GCD on a grid
brute force
,
dfs and similar
,
dp
,
implementation
,
math
,
number theory
1900
x3787
1955F
Unfair Game
dp
,
games
,
greedy
,
math
,
schedules
1800
x6230
1954D
Colored Balls
combinatorics
,
dp
,
math
,
sortings
1800
x5260
1950G
Shuffling Songs
bitmasks
,
dfs and similar
,
dp
,
graphs
,
hashing
,
implementation
,
strings
1900
x3724
1949C
Annual Ants' Gathering
dfs and similar
,
dp
,
greedy
,
trees
1900
x1352
1948C
Arrow Path
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
shortest paths
1300
x15039
1946C
Tree Cutting
binary search
,
dp
,
greedy
,
implementation
,
trees
1600
x9537
1945D
Seraphim the Owl
dp
,
greedy
1300
x12805
1941E
Rudolf and k Bridges
binary search
,
data structures
,
dp
,
two pointers
1600
x8519
1941D
Rudolf and the Ball Game
dfs and similar
,
dp
,
implementation
1200
x17062
1937B
Binary Path
dp
,
greedy
,
implementation
1300
x13560
1935C
Messenger in MAC
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1800
x7363
1934B
Yet Another Coin Problem
brute force
,
dp
,
greedy
,
math
1200
x17191
1932F
Feed Cats
data structures
,
dp
,
sortings
1900
x3545
1930D1
Sum over all Substrings (Easy Version)
brute force
,
dp
,
greedy
,
strings
1800
x3784
1929D
Sasha and a Walk in the City
combinatorics
,
dp
,
math
,
trees
1900
x4284
1927D
Find the Different Ones!
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
two pointers
1300
x18887
1926G
Vlad and Trouble at MIT
dfs and similar
,
dp
,
flows
,
graphs
,
greedy
,
implementation
,
trees
1900
x3093
1926E
Vlad and an Odd Ordering
binary search
,
bitmasks
,
data structures
,
dp
,
implementation
,
math
,
number theory
1500
x10551
1926C
Vlad and a Sum of Sum of Digits
dp
,
implementation
1200
x24002
1925D
Good Trip
combinatorics
,
dp
,
math
,
probabilities
1900
x3314
1924A
Did We Get Everything Covered?
constructive algorithms
,
dp
,
greedy
,
shortest paths
,
strings
1500
x12669
1923E
Count Paths
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
,
trees
2000
x3313
1921F
Sum of Progression
brute force
,
data structures
,
dp
,
implementation
,
math
1900
x3535
1919C
Grouping Increases
data structures
,
dp
,
greedy
1400
x17207
1918D
Blocking Elements
binary search
,
data structures
,
dp
,
implementation
,
two pointers
1900
x4369
1914F
Programming Competition
dfs and similar
,
dp
,
graph matchings
,
greedy
,
trees
1900
x3763
1914D
Three Activities
brute force
,
dp
,
greedy
,
implementation
,
sortings
1200
x18861
1912K
Kim's Quest
bitmasks
,
combinatorics
,
dp
1800
x2126
1909I
Short Permutation Problem
combinatorics
,
dp
,
fft
,
math
1900
x98
1906E
Merge Not Sort
constructive algorithms
,
dp
1900
x1341
1902D
Robot Queries
binary search
,
data structures
,
dp
,
implementation
1900
x3758
1901D
Yet Another Monster Fight
binary search
,
dp
,
greedy
,
implementation
,
math
1700
x6336
1900D
Small GCD
bitmasks
,
brute force
,
dp
,
math
,
number theory
2000
x3808
1900C
Anji's Binary Tree
dfs and similar
,
dp
,
trees
1300
x10661
1895C
Torn Lucky Ticket
brute force
,
dp
,
hashing
,
implementation
,
math
1400
x10305
1889C1
Doremy's Drying Plan (Easy Version)
brute force
,
data structures
,
dp
,
greedy
,
sortings
2000
x3068
1884C
Medium Design
brute force
,
data structures
,
dp
,
greedy
,
sortings
1700
x5592
1882D
Tree XOR
bitmasks
,
dfs and similar
,
dp
,
greedy
,
trees
1900
x5071
1881F
Minimum Maximum Distance
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
1700
x6189
1881E
Block Sequence
dp
1500
x12170
1879D
Sum of XOR Functions
bitmasks
,
combinatorics
,
divide and conquer
,
dp
,
math
1700
x6741
1879C
Make it Alternating
combinatorics
,
dp
,
greedy
1300
x15343
1875D
Jellyfish and Mex
dp
1600
x7797
1872E
Data Structures Fan
binary search
,
bitmasks
,
data structures
,
dp
1500
x12336
1870C
Colorful Table
binary search
,
data structures
,
dp
,
implementation
,
math
,
two pointers
1300
x10920
1866C
Completely Searching for Inversions
dfs and similar
,
dp
,
graphs
1900
x2893
1864D
Matrix Cascade
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
math
1700
x6436
1862F
Magic Will Save the World
binary search
,
bitmasks
,
brute force
,
dp
1800
x5803
1861D
Sorting By Multiplication
dp
,
greedy
1800
x6382
1860C
Game on Permutation
data structures
,
dp
,
games
,
greedy
1400
x12617
1859D
Andrey and Escape from Capygrad
binary search
,
data structures
,
dp
,
dsu
,
greedy
,
sortings
1800
x6639
1859C
Another Permutation Problem
brute force
,
dp
,
greedy
,
math
1200
x16471
1858B
The Walkway
brute force
,
dp
,
greedy
,
math
,
number theory
1500
x10799
1856E1
PermuTree (easy version)
dfs and similar
,
dp
,
trees
1800
x4981
1856C
To Become Max
binary search
,
brute force
,
data structures
,
dp
1600
x11307
1851E
Nastya and Potions
dfs and similar
,
dp
,
graphs
,
sortings
1500
x9607
1847C
Vampiric Powers, anyone?
bitmasks
,
brute force
,
dp
,
greedy
1400
x12349
1846G
Rudolf and CodeVid-23
bitmasks
,
dp
,
graphs
,
greedy
,
shortest paths
1900
x4133
1846C
Rudolf and the Another Competition
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1200
x18168
1845D
Rating System
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
math
,
two pointers
1800
x7422
1845C
Strong Password
binary search
,
dp
,
greedy
,
strings
1400
x13522
1844C
Particles
dp
,
greedy
,
implementation
,
math
1300
x15041
1843F1
Omsk Metro (simple version)
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
trees
1800
x5048
1843D
Apple Tree
combinatorics
,
dfs and similar
,
dp
,
math
,
trees
1200
x17235
1842C
Tenzing and Balls
dp
1500
x11908
1841C
Ranom Numbers
brute force
,
dp
,
greedy
,
math
,
strings
1800
x7395
1833G
Ksyusha and Chinchilla
constructive algorithms
,
dfs and similar
,
dp
,
dsu
,
greedy
,
implementation
,
trees
1800
x5009
1830A
Copil Copac Draws Trees
dfs and similar
,
dp
,
graphs
,
trees
1400
x12653
1829H
Don't Blame Me
bitmasks
,
combinatorics
,
dp
,
math
1700
x7215
1829G
Hits Different
data structures
,
dp
,
implementation
,
math
1600
x9621
1827B1
Range Sorting (Easy Version)
binary search
,
dp
,
dsu
,
greedy
,
trees
,
two pointers
2000
x3703
1826D
Running Miles
brute force
,
dp
,
greedy
1700
x8801
1822F
Gardening Friends
brute force
,
dfs and similar
,
dp
,
graphs
,
trees
1700
x5688
1811E
Living Sequence
binary search
,
dp
,
math
,
number theory
1500
x11719
1808C
Unlucky Numbers
brute force
,
dp
,
greedy
,
implementation
1900
x3621
1805D
A Wide, Wide Graph
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
1800
x6180
1804D
Accommodation
brute force
,
dp
,
greedy
,
implementation
2000
x4460
1801C
Music Festival
binary search
,
data structures
,
dp
,
greedy
,
sortings
1900
x3266
1799D1
Hot Start Up (easy version)
dp
1900
x4181
1797D
Li Hua and Tree
brute force
,
data structures
,
dfs and similar
,
dp
,
implementation
,
trees
1900
x3742
1796D
Maximum Subarray
data structures
,
dp
,
greedy
,
two pointers
2000
x4033
1794D
Counting Factorizations
combinatorics
,
divide and conquer
,
dp
,
math
,
number theory
1900
x3402
1793D
Moscow Gorillas
binary search
,
dp
,
greedy
,
implementation
,
math
,
two pointers
1800
x5841
1789C
Serval and Toxel's Arrays
combinatorics
,
dp
,
implementation
,
math
1500
x8175
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