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Before contest
Codeforces Round 941 (Div. 1)
19:15:09
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*has extra registration
Before contest
Codeforces Round 941 (Div. 2)
19:15:09
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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
1736C2
Good Subarrays (Hard Version)
binary search
,
data structures
,
dp
,
two pointers
2400
x1229
1343F
Restore the Permutation by Sorted Segments
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x1229
1443E
Long Permutation
brute force
,
math
,
two pointers
2400
x1223
962F
Simple Cycles Edges
dfs and similar
,
graphs
,
trees
2400
x1207
1005E2
Median on Segments (General Case Edition)
sortings
2400
x1205
1943D1
Counting Is Fun (Easy Version)
brute force
,
combinatorics
,
dp
,
math
2400
x1183
1542E1
Abnormal Permutation Pairs (easy version)
combinatorics
,
dp
,
fft
,
math
2400
x1180
1879E
Interactive Game with Coloring
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
implementation
,
interactive
,
trees
2400
x1179
906C
Party
bitmasks
,
brute force
,
dp
,
graphs
2400
x1179
593D
Happy Tree Party
data structures
,
dfs and similar
,
graphs
,
math
,
trees
2400
x1178
1764E
Doremy's Number Line
dp
,
greedy
,
sortings
2400
x1176
1739E
Cleaning Robot
bitmasks
,
dp
2400
x1165
1934D2
XOR Break --- Game Version
bitmasks
,
games
,
greedy
,
interactive
2400
x1164
1142C
U2
geometry
2400
x1164
524E
Rooks and Rectangles
data structures
,
sortings
2400
x1151
1585F
Non-equal Neighbours
combinatorics
,
dp
,
math
2400
x1149
498B
Name That Tune
dp
,
probabilities
,
two pointers
2400
x1147
1935E
Distance Learning Courses in MAC
bitmasks
,
brute force
,
data structures
,
greedy
,
math
2400
x1146
1738F
Connectivity Addicts
constructive algorithms
,
dsu
,
graphs
,
greedy
,
interactive
,
shortest paths
,
trees
2400
x1146
1839E
Decreasing Game
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
interactive
2400
x1141
1697E
Coloring
brute force
,
combinatorics
,
constructive algorithms
,
dp
,
geometry
,
graphs
,
greedy
,
implementation
,
math
2400
x1135
679C
Bear and Square Grid
dfs and similar
,
dsu
,
implementation
2400
x1129
835E
The penguin's game
binary search
,
constructive algorithms
,
interactive
2400
x1123
1028E
Restore Array
constructive algorithms
2400
x1121
1264C
Beautiful Mirrors with queries
data structures
,
probabilities
2400
x1120
1205C
Palindromic Paths
implementation
,
interactive
2400
x1115
1680D
Dog Walking
brute force
,
greedy
,
math
2400
x1110
1632E1
Distance Tree (easy version)
binary search
,
data structures
,
dfs and similar
,
graphs
,
shortest paths
,
trees
2400
x1107
1679E
Typical Party in Dorm
bitmasks
,
combinatorics
,
dp
,
strings
2400
x1093
605C
Freelancer's Dreams
geometry
2400
x1093
802N
April Fools' Problem (medium)
binary search
,
flows
,
graphs
2400
x1088
601D
Acyclic Organic Compounds
data structures
,
dfs and similar
,
dsu
,
hashing
,
strings
,
trees
2400
x1088
377D
Developing Game
data structures
2400
x1079
1089K
King Kog's Reception
data structures
2400
x1078
808F
Card Game
binary search
,
flows
,
graphs
2400
x1067
1619H
Permutation and Queries
brute force
,
data structures
,
divide and conquer
,
two pointers
2400
x1065
1868C
Travel Plan
combinatorics
,
dp
,
implementation
,
math
,
trees
2400
x1063
498D
Traffic Jams in the Land
data structures
,
dp
,
number theory
2400
x1061
1874B
Jellyfish and Math
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
shortest paths
2400
x1055
1936C
Pokémon Arena
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
2400
x1054
526E
Transmitting Levels
dp
,
implementation
2400
x1052
1578L
Labyrinth
binary search
,
dsu
,
greedy
2400
x1049
641D
Little Artem and Random Variable
dp
,
implementation
,
math
,
probabilities
2400
x1046
1795F
Blocking Chips
binary search
,
constructive algorithms
,
dfs and similar
,
greedy
,
trees
2400
x1042
17D
Notepad
number theory
2400
x1029
1924C
Fractal Origami
geometry
,
math
,
matrices
2400
x1027
258E
Little Elephant and Tree
data structures
,
dfs and similar
,
trees
2400
x1026
749E
Inversions After Shuffle
data structures
,
probabilities
2400
x1025
452E
Three strings
data structures
,
dsu
,
string suffix structures
,
strings
2400
x1025
1735E
House Planning
constructive algorithms
,
data structures
,
graph matchings
,
greedy
2400
x1021
632F
Magic Matrix
brute force
,
divide and conquer
,
graphs
,
matrices
,
trees
2400
x1019
780F
Axel and Marston in Bitland
bitmasks
,
dp
,
graphs
,
matrices
2400
x1018
1774F1
Magician and Pigs (Easy Version)
brute force
,
data structures
,
implementation
2400
x1017
31E
TV Game
dp
2400
x1017
1526E
Oolimry and Suffix Array
combinatorics
,
constructive algorithms
,
math
2400
x1016
1585E
Frequency Queries
data structures
,
dfs and similar
,
trees
2400
x1011
1004E
Sonya and Ice Cream
binary search
,
data structures
,
dp
,
greedy
,
shortest paths
,
trees
2400
x1007
125E
MST Company
binary search
,
graphs
2400
x1005
1794E
Labeling the Tree with Distances
data structures
,
dp
,
greedy
,
hashing
,
implementation
,
trees
2400
x1003
744C
Hongcow Buys a Deck of Cards
bitmasks
,
brute force
,
dp
2400
x1002
707E
Garlands
data structures
2400
x999
1605E
Array Equalizer
binary search
,
greedy
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2400
x995
1282E
The Cake Is a Lie
constructive algorithms
,
data structures
,
dfs and similar
,
graphs
2400
x990
1107G
Vasya and Maximum Profit
binary search
,
constructive algorithms
,
data structures
,
dp
,
dsu
2400
x986
1930E
2..3...4.... Wonderful! Wonderful!
combinatorics
,
dp
,
math
2400
x974
1091E
New Year and the Acquaintance Estimation
binary search
,
data structures
,
graphs
,
greedy
,
implementation
,
math
,
sortings
2400
x974
756D
Bacterial Melee
brute force
,
combinatorics
,
dp
,
string suffix structures
2400
x974
1221F
Choose a Square
binary search
,
data structures
,
sortings
2400
x973
886E
Maximum Element
combinatorics
,
dp
,
math
2400
x972
1093F
Vasya and Array
dp
2400
x970
1044D
Deduction Queries
data structures
,
dsu
2400
x968
1194F
Crossword Expert
combinatorics
,
dp
,
number theory
,
probabilities
,
two pointers
2400
x965
621D
Rat Kwesh and Cheese
brute force
,
constructive algorithms
,
math
2400
x961
585C
Alice, Bob, Oranges and Apples
number theory
2400
x961
1132G
Greedy Subsequences
data structures
,
dp
,
trees
2400
x951
1038E
Maximum Matching
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
2400
x951
1882E1
Two Permutations (Easy Version)
brute force
,
constructive algorithms
,
greedy
,
number theory
2400
x950
1784D
Wooden Spoon
combinatorics
,
dp
2400
x948
1106F
Lunar New Year and a Recursive Sequence
math
,
matrices
,
number theory
2400
x945
767E
Change-free
greedy
2400
x944
1152E
Neko and Flashback
constructive algorithms
,
dfs and similar
,
graphs
2400
x932
1016E
Rest In The Shades
binary search
,
geometry
2400
x928
297C
Splitting the Uniqueness
constructive algorithms
2400
x927
1007B
Pave the Parallelepiped
bitmasks
,
brute force
,
combinatorics
,
math
,
number theory
2400
x921
1817C
Similar Polynomials
combinatorics
,
math
2400
x918
1670F
Jee, You See?
bitmasks
,
combinatorics
,
dp
2400
x915
1099F
Cookies
binary search
,
data structures
,
dfs and similar
,
dp
,
games
,
trees
2400
x907
416D
Population Size
greedy
,
implementation
,
math
2400
x902
1129C
Morse Code
binary search
,
data structures
,
dp
,
hashing
,
sortings
,
string suffix structures
,
strings
2400
x896
1913E
Matrix Problem
flows
,
graphs
2400
x895
1032F
Vasya and Maximum Matching
dp
,
trees
2400
x894
1902F
Trees and XOR Queries Again
data structures
,
dfs and similar
,
divide and conquer
,
graphs
,
implementation
,
math
,
trees
2400
x886
1080E
Sonya and Matrix Beauty
strings
2400
x886
676E
The Last Fight Between Human and AI
math
2400
x882
329C
Graph Reconstruction
constructive algorithms
2400
x877
164C
Machine Programming
flows
,
graphs
2400
x874
939F
Cutlet
data structures
,
dp
2400
x872
990F
Flow Control
dfs and similar
,
dp
,
greedy
,
trees
2400
x869
1252F
Regular Forestation
hashing
,
trees
2400
x868
1098C
Construct a tree
binary search
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2400
x865
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