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Before contest
Codeforces Round 941 (Div. 1)
13:56:02
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Before contest
Codeforces Round 941 (Div. 2)
13:56:02
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data structures
combine-tags-by-or
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2-sat
binary search
bitmasks
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combinatorics
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data structures
dfs and similar
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Name
1428F
Fruit Sequences
binary search
,
data structures
,
divide and conquer
,
dp
,
two pointers
2400
x2160
915F
Imbalance Value of a Tree
data structures
,
dsu
,
graphs
,
trees
2400
x2299
1251E2
Voting (Hard Version)
binary search
,
data structures
,
greedy
2400
x2352
484D
Kindergarten
data structures
,
dp
,
greedy
2400
x2410
1709E
XOR Tree
bitmasks
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
trees
2400
x2426
1187D
Subarray Sorting
data structures
,
sortings
2400
x2448
786C
Till I Collapse
data structures
,
divide and conquer
2400
x2509
444C
DZY Loves Colors
data structures
2400
x2773
145E
Lucky Queries
data structures
2400
x2893
246E
Blood Cousins Return
binary search
,
data structures
,
dfs and similar
,
dp
,
sortings
2400
x2947
446C
DZY Loves Fibonacci Numbers
data structures
,
math
,
number theory
2400
x3168
311B
Cats Transport
data structures
,
dp
2400
x3178
1000F
One Occurrence
data structures
,
divide and conquer
2400
x3500
1083E
The Fair Nut and Rectangles
data structures
,
dp
,
geometry
2400
x3776
865D
Buy Low Sell High
constructive algorithms
,
data structures
,
greedy
2400
x4714
375D
Tree and Queries
data structures
,
dfs and similar
,
trees
2400
x6171
342E
Xenia and Tree
data structures
,
divide and conquer
,
trees
2400
x7593
1488F
Dogecoin
*special problem
,
*special problem
,
binary search
,
data structures
2300
x167
1403B
Spring cleaning
*special problem
,
data structures
,
dfs and similar
,
graphs
,
trees
2300
x358
316E2
Summer Homework
data structures
,
math
2300
x380
873E
Awards For Contestants
brute force
,
data structures
,
dp
2300
x488
316E3
Summer Homework
data structures
,
math
2300
x504
313E
Ilya and Two Numbers
constructive algorithms
,
data structures
,
dsu
,
greedy
2300
x540
424D
Biathlon Track
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
2300
x554
76F
Tourist
binary search
,
data structures
,
dp
2300
x601
89C
Chip Play
brute force
,
data structures
,
implementation
2300
x609
414D
Mashmokh and Water Tanks
binary search
,
data structures
,
greedy
,
trees
,
two pointers
2300
x673
38G
Queue
data structures
2300
x673
467E
Alex and Complicated Task
data structures
,
dp
,
greedy
2300
x761
1039A
Timetable
constructive algorithms
,
data structures
,
greedy
,
math
2300
x771
628E
Zbazi in Zeydabad
data structures
,
implementation
2300
x830
1575I
Illusions of the Desert
data structures
,
trees
2300
x837
425C
Sereja and Two Sequences
data structures
,
dp
2300
x881
1468M
Similar Sets
data structures
,
graphs
,
implementation
2300
x904
895E
Eyes Closed
data structures
,
probabilities
2300
x907
1200F
Graph Traveler
brute force
,
data structures
,
dfs and similar
,
dp
,
graphs
,
implementation
,
math
,
number theory
2300
x909
629E
Famil Door and Roads
combinatorics
,
data structures
,
dfs and similar
,
dp
,
probabilities
,
trees
2300
x966
878B
Teams Formation
data structures
,
implementation
2300
x1027
557E
Ann and Half-Palindrome
data structures
,
dp
,
graphs
,
string suffix structures
,
strings
,
trees
2300
x1050
1379D
New Passenger Trams
binary search
,
brute force
,
data structures
,
sortings
,
two pointers
2300
x1058
1878G
wxhtzdy ORO Tree
binary search
,
bitmasks
,
brute force
,
data structures
,
dfs and similar
,
implementation
,
trees
2300
x1086
558D
Guess Your Way Out! II
data structures
,
implementation
,
sortings
2300
x1105
727E
Games on a CD
data structures
,
hashing
,
string suffix structures
,
strings
2300
x1112
1766E
Decomposition
binary search
,
brute force
,
data structures
,
divide and conquer
,
dp
,
two pointers
2300
x1123
901C
Bipartite Segments
binary search
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
two pointers
2300
x1131
1797E
Li Hua and Array
brute force
,
data structures
,
dsu
,
math
,
number theory
,
two pointers
2300
x1179
830C
Bamboo Partition
brute force
,
data structures
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2300
x1181
1914G2
Light Bulbs (Hard Version)
combinatorics
,
data structures
,
dfs and similar
,
dp
,
graphs
,
hashing
2300
x1209
1584E
Game with Stones
binary search
,
data structures
,
games
,
greedy
2300
x1216
1814E
Chain Chips
data structures
,
dp
,
matrices
2300
x1232
1781E
Rectangle Shrinking
binary search
,
brute force
,
data structures
,
greedy
,
implementation
,
two pointers
2300
x1261
803G
Periodic RMQ Problem
data structures
2300
x1291
1239C
Queue in the Train
data structures
,
greedy
,
implementation
2300
x1304
1864F
Exotic Queries
data structures
,
implementation
,
sortings
2300
x1306
1780F
Three Chairs
bitmasks
,
brute force
,
combinatorics
,
data structures
,
dp
,
number theory
,
sortings
2300
x1368
425D
Sereja and Squares
binary search
,
data structures
,
hashing
2300
x1386
500E
New Year Domino
data structures
,
dp
,
dsu
2300
x1389
1743F
Intersection and Union
data structures
,
dp
,
matrices
,
probabilities
2300
x1407
1167F
Scalar Queries
combinatorics
,
data structures
,
math
,
sortings
2300
x1431
610D
Vika and Segments
constructive algorithms
,
data structures
,
geometry
,
two pointers
2300
x1434
1895E
Infinite Card Game
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
dsu
,
games
,
graphs
,
greedy
,
sortings
,
two pointers
2300
x1449
1197E
Culture Code
binary search
,
combinatorics
,
data structures
,
dp
,
shortest paths
,
sortings
2300
x1452
1276C
Beautiful Rectangle
brute force
,
combinatorics
,
constructive algorithms
,
data structures
,
greedy
,
math
2300
x1463
1843F2
Omsk Metro (hard version)
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
math
,
trees
2300
x1465
1927G
Paint Charges
data structures
,
dp
,
greedy
,
math
2300
x1477
1849E
Max to the Right of Min
binary search
,
data structures
,
divide and conquer
,
dp
,
dsu
,
two pointers
2300
x1491
1805E
There Should Be a Lot of Maximums
brute force
,
data structures
,
dfs and similar
,
dp
,
trees
,
two pointers
2300
x1519
677D
Vanya and Treasure
data structures
,
dp
,
graphs
,
shortest paths
2300
x1520
1304F1
Animal Observation (easy version)
data structures
,
dp
2300
x1522
1842E
Tenzing and Triangle
data structures
,
dp
,
geometry
,
greedy
,
math
2300
x1524
1681F
Unique Occurrences
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
dsu
,
trees
2300
x1527
1399F
Yet Another Segments Subset
data structures
,
dp
,
graphs
,
sortings
2300
x1554
877F
Ann and Books
data structures
,
flows
,
hashing
2300
x1603
1929F
Sasha and the Wedding Binary Search Tree
brute force
,
combinatorics
,
data structures
,
dfs and similar
,
math
,
trees
2300
x1605
1217E
Sum Queries?
data structures
,
greedy
,
implementation
,
math
2300
x1639
1917D
Yet Another Inversions Problem
combinatorics
,
data structures
,
dp
,
implementation
,
math
,
number theory
2300
x1643
1236D
Alice and the Doll
brute force
,
data structures
,
greedy
,
implementation
2300
x1644
1728E
Red-Black Pepper
brute force
,
data structures
,
greedy
,
math
,
number theory
2300
x1646
893F
Subtree Minimum Query
data structures
,
trees
2300
x1657
1285E
Delete a Segment
brute force
,
constructive algorithms
,
data structures
,
dp
,
graphs
,
sortings
,
trees
,
two pointers
2300
x1659
1268C
K Integers
binary search
,
data structures
2300
x1664
1748E
Yet Another Array Counting Problem
binary search
,
data structures
,
divide and conquer
,
dp
,
flows
,
math
,
trees
2300
x1696
1062E
Company
binary search
,
data structures
,
dfs and similar
,
greedy
,
trees
2300
x1702
1621E
New School
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
sortings
2300
x1710
995C
Leaving the Bar
brute force
,
data structures
,
geometry
,
greedy
,
math
,
sortings
2300
x1726
1691E
Number of Groups
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
2300
x1741
1552E
Colors and Intervals
constructive algorithms
,
data structures
,
greedy
,
sortings
2300
x1769
1093G
Multidimensional Queries
bitmasks
,
data structures
2300
x1820
884D
Boxes And Balls
data structures
,
greedy
2300
x1869
85D
Sum of Medians
binary search
,
brute force
,
data structures
,
implementation
2300
x1905
1380E
Merging Towers
data structures
,
dsu
,
implementation
,
trees
2300
x1908
1601C
Optimal Insertion
data structures
,
divide and conquer
,
dp
,
greedy
,
sortings
2300
x1913
1625D
Binary Spiders
bitmasks
,
data structures
,
implementation
,
math
,
sortings
,
trees
2300
x1963
1705E
Mark and Professor Koro
binary search
,
bitmasks
,
brute force
,
combinatorics
,
data structures
,
greedy
2300
x1977
1654E
Arithmetic Operations
brute force
,
data structures
,
graphs
,
math
2300
x1988
1919F1
Wine Factory (Easy Version)
data structures
,
greedy
2300
x2007
1783E
Game of the Year
brute force
,
data structures
,
math
,
number theory
2300
x2016
1834E
MEX of LCM
binary search
,
data structures
,
implementation
,
math
,
number theory
2300
x2043
515E
Drazil and Park
data structures
2300
x2052
1916E
Happy Life in University
data structures
,
dfs and similar
,
greedy
,
trees
2300
x2086
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