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Codeforces Round 940 (Div. 2)
3 days
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data structures
combine-tags-by-or
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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
600E
Lomsat gelral
data structures
,
dfs and similar
,
dsu
,
trees
2300
x12531
438D
The Child and Sequence
data structures
,
math
2300
x7771
558E
A Simple Task
data structures
,
sortings
,
strings
2300
x5543
786B
Legacy
data structures
,
graphs
,
shortest paths
2300
x5371
1009F
Dominant Indices
data structures
,
dsu
,
trees
2300
x5054
915E
Physical Education Lessons
data structures
,
implementation
,
sortings
2300
x3963
888G
Xor-MST
bitmasks
,
constructive algorithms
,
data structures
2300
x3851
718C
Sasha and Array
data structures
,
math
,
matrices
2300
x3355
1699D
Almost Triple Deletions
data structures
,
dp
,
greedy
2300
x3013
825E
Minimal Labels
data structures
,
dfs and similar
,
graphs
,
greedy
2300
x2976
708C
Centroids
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2300
x2964
675E
Trains and Statistic
data structures
,
dp
,
greedy
2300
x2594
1528C
Trees of Tranquillity
data structures
,
dfs and similar
,
greedy
,
trees
2300
x2494
1494D
Dogeforces
constructive algorithms
,
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
greedy
,
sortings
,
trees
2300
x2483
1404C
Fixed Point Removal
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
2300
x2481
1658D2
388535 (Hard Version)
bitmasks
,
brute force
,
data structures
,
math
2300
x2425
817F
MEX Queries
binary search
,
data structures
,
trees
2300
x2389
1706E
Qpwoeirut and Vertices
binary search
,
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
greedy
,
trees
2300
x2337
1476E
Pattern Matching
bitmasks
,
data structures
,
dfs and similar
,
graphs
,
hashing
,
sortings
,
strings
2300
x2236
1385F
Removing Leaves
data structures
,
greedy
,
implementation
,
trees
2300
x2236
891C
Envy
data structures
,
dsu
,
graphs
2300
x2205
1553F
Pairwise Modulo
data structures
,
math
2300
x2094
1251E1
Voting (Easy Version)
data structures
,
dp
,
greedy
2300
x2085
1916E
Happy Life in University
data structures
,
dfs and similar
,
greedy
,
trees
2300
x2067
515E
Drazil and Park
data structures
2300
x2047
1834E
MEX of LCM
binary search
,
data structures
,
implementation
,
math
,
number theory
2300
x2021
1783E
Game of the Year
brute force
,
data structures
,
math
,
number theory
2300
x2008
1919F1
Wine Factory (Easy Version)
data structures
,
greedy
2300
x1993
1654E
Arithmetic Operations
brute force
,
data structures
,
graphs
,
math
2300
x1983
1705E
Mark and Professor Koro
binary search
,
bitmasks
,
brute force
,
combinatorics
,
data structures
,
greedy
2300
x1964
1625D
Binary Spiders
bitmasks
,
data structures
,
implementation
,
math
,
sortings
,
trees
2300
x1961
1601C
Optimal Insertion
data structures
,
divide and conquer
,
dp
,
greedy
,
sortings
2300
x1909
85D
Sum of Medians
binary search
,
brute force
,
data structures
,
implementation
2300
x1905
1380E
Merging Towers
data structures
,
dsu
,
implementation
,
trees
2300
x1894
884D
Boxes And Balls
data structures
,
greedy
2300
x1863
1093G
Multidimensional Queries
bitmasks
,
data structures
2300
x1817
1552E
Colors and Intervals
constructive algorithms
,
data structures
,
greedy
,
sortings
2300
x1764
1691E
Number of Groups
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
2300
x1727
995C
Leaving the Bar
brute force
,
data structures
,
geometry
,
greedy
,
math
,
sortings
2300
x1714
1621E
New School
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
sortings
2300
x1707
1062E
Company
binary search
,
data structures
,
dfs and similar
,
greedy
,
trees
2300
x1696
1748E
Yet Another Array Counting Problem
binary search
,
data structures
,
divide and conquer
,
dp
,
flows
,
math
,
trees
2300
x1693
1268C
K Integers
binary search
,
data structures
2300
x1659
1285E
Delete a Segment
brute force
,
constructive algorithms
,
data structures
,
dp
,
graphs
,
sortings
,
trees
,
two pointers
2300
x1647
893F
Subtree Minimum Query
data structures
,
trees
2300
x1644
1728E
Red-Black Pepper
brute force
,
data structures
,
greedy
,
math
,
number theory
2300
x1643
1236D
Alice and the Doll
brute force
,
data structures
,
greedy
,
implementation
2300
x1642
1217E
Sum Queries?
data structures
,
greedy
,
implementation
,
math
2300
x1635
1917D
Yet Another Inversions Problem
combinatorics
,
data structures
,
dp
,
implementation
,
math
,
number theory
2300
x1629
877F
Ann and Books
data structures
,
flows
,
hashing
2300
x1591
1929F
Sasha and the Wedding Binary Search Tree
brute force
,
combinatorics
,
data structures
,
dfs and similar
,
math
,
trees
2300
x1589
1399F
Yet Another Segments Subset
data structures
,
dp
,
graphs
,
sortings
2300
x1545
1681F
Unique Occurrences
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
dsu
,
trees
2300
x1522
1304F1
Animal Observation (easy version)
data structures
,
dp
2300
x1521
677D
Vanya and Treasure
data structures
,
dp
,
graphs
,
shortest paths
2300
x1518
1842E
Tenzing and Triangle
data structures
,
dp
,
geometry
,
greedy
,
math
2300
x1517
1805E
There Should Be a Lot of Maximums
brute force
,
data structures
,
dfs and similar
,
dp
,
trees
,
two pointers
2300
x1506
1849E
Max to the Right of Min
binary search
,
data structures
,
divide and conquer
,
dp
,
dsu
,
two pointers
2300
x1482
1276C
Beautiful Rectangle
brute force
,
combinatorics
,
constructive algorithms
,
data structures
,
greedy
,
math
2300
x1461
1927G
Paint Charges
data structures
,
dp
,
greedy
,
math
2300
x1459
1843F2
Omsk Metro (hard version)
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
math
,
trees
2300
x1453
1197E
Culture Code
binary search
,
combinatorics
,
data structures
,
dp
,
shortest paths
,
sortings
2300
x1447
1895E
Infinite Card Game
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
dsu
,
games
,
graphs
,
greedy
,
sortings
,
two pointers
2300
x1436
1167F
Scalar Queries
combinatorics
,
data structures
,
math
,
sortings
2300
x1426
610D
Vika and Segments
constructive algorithms
,
data structures
,
geometry
,
two pointers
2300
x1426
1743F
Intersection and Union
data structures
,
dp
,
matrices
,
probabilities
2300
x1401
500E
New Year Domino
data structures
,
dp
,
dsu
2300
x1387
425D
Sereja and Squares
binary search
,
data structures
,
hashing
2300
x1383
1780F
Three Chairs
bitmasks
,
brute force
,
combinatorics
,
data structures
,
dp
,
number theory
,
sortings
2300
x1360
1239C
Queue in the Train
data structures
,
greedy
,
implementation
2300
x1304
1864F
Exotic Queries
data structures
,
implementation
,
sortings
2300
x1303
803G
Periodic RMQ Problem
data structures
2300
x1288
1781E
Rectangle Shrinking
binary search
,
brute force
,
data structures
,
greedy
,
implementation
,
two pointers
2300
x1258
1814E
Chain Chips
data structures
,
dp
,
matrices
2300
x1212
1584E
Game with Stones
binary search
,
data structures
,
games
,
greedy
2300
x1212
1914G2
Light Bulbs (Hard Version)
combinatorics
,
data structures
,
dfs and similar
,
dp
,
graphs
,
hashing
2300
x1187
830C
Bamboo Partition
brute force
,
data structures
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2300
x1180
1797E
Li Hua and Array
brute force
,
data structures
,
dsu
,
math
,
number theory
,
two pointers
2300
x1174
901C
Bipartite Segments
binary search
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
two pointers
2300
x1128
1766E
Decomposition
binary search
,
brute force
,
data structures
,
divide and conquer
,
dp
,
two pointers
2300
x1119
727E
Games on a CD
data structures
,
hashing
,
string suffix structures
,
strings
2300
x1108
558D
Guess Your Way Out! II
data structures
,
implementation
,
sortings
2300
x1102
1878G
wxhtzdy ORO Tree
binary search
,
bitmasks
,
brute force
,
data structures
,
dfs and similar
,
implementation
,
trees
2300
x1079
1379D
New Passenger Trams
binary search
,
brute force
,
data structures
,
sortings
,
two pointers
2300
x1054
557E
Ann and Half-Palindrome
data structures
,
dp
,
graphs
,
string suffix structures
,
strings
,
trees
2300
x1044
878B
Teams Formation
data structures
,
implementation
2300
x1026
629E
Famil Door and Roads
combinatorics
,
data structures
,
dfs and similar
,
dp
,
probabilities
,
trees
2300
x965
895E
Eyes Closed
data structures
,
probabilities
2300
x906
1200F
Graph Traveler
brute force
,
data structures
,
dfs and similar
,
dp
,
graphs
,
implementation
,
math
,
number theory
2300
x904
1468M
Similar Sets
data structures
,
graphs
,
implementation
2300
x889
425C
Sereja and Two Sequences
data structures
,
dp
2300
x880
1575I
Illusions of the Desert
data structures
,
trees
2300
x832
628E
Zbazi in Zeydabad
data structures
,
implementation
2300
x825
1039A
Timetable
constructive algorithms
,
data structures
,
greedy
,
math
2300
x770
467E
Alex and Complicated Task
data structures
,
dp
,
greedy
2300
x759
414D
Mashmokh and Water Tanks
binary search
,
data structures
,
greedy
,
trees
,
two pointers
2300
x673
38G
Queue
data structures
2300
x672
89C
Chip Play
brute force
,
data structures
,
implementation
2300
x609
76F
Tourist
binary search
,
data structures
,
dp
2300
x598
424D
Biathlon Track
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
2300
x553
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