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Before contest
Codeforces Round 941 (Div. 1)
30:26:27
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Before contest
Codeforces Round 941 (Div. 2)
30:26:26
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Name
600E
Lomsat gelral
data structures
,
dfs and similar
,
dsu
,
trees
2300
x12591
438D
The Child and Sequence
data structures
,
math
2300
x7810
558E
A Simple Task
data structures
,
sortings
,
strings
2300
x5558
786B
Legacy
data structures
,
graphs
,
shortest paths
2300
x5393
1009F
Dominant Indices
data structures
,
dsu
,
trees
2300
x5073
915E
Physical Education Lessons
data structures
,
implementation
,
sortings
2300
x3986
888G
Xor-MST
bitmasks
,
constructive algorithms
,
data structures
2300
x3871
718C
Sasha and Array
data structures
,
math
,
matrices
2300
x3360
1699D
Almost Triple Deletions
data structures
,
dp
,
greedy
2300
x3021
825E
Minimal Labels
data structures
,
dfs and similar
,
graphs
,
greedy
2300
x2986
708C
Centroids
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2300
x2973
675E
Trains and Statistic
data structures
,
dp
,
greedy
2300
x2597
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
x2488
1404C
Fixed Point Removal
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
2300
x2484
1658D2
388535 (Hard Version)
bitmasks
,
brute force
,
data structures
,
math
2300
x2431
817F
MEX Queries
binary search
,
data structures
,
trees
2300
x2391
1706E
Qpwoeirut and Vertices
binary search
,
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
greedy
,
trees
2300
x2352
1385F
Removing Leaves
data structures
,
greedy
,
implementation
,
trees
2300
x2243
1476E
Pattern Matching
bitmasks
,
data structures
,
dfs and similar
,
graphs
,
hashing
,
sortings
,
strings
2300
x2238
891C
Envy
data structures
,
dsu
,
graphs
2300
x2212
1553F
Pairwise Modulo
data structures
,
math
2300
x2095
1251E1
Voting (Easy Version)
data structures
,
dp
,
greedy
2300
x2090
1916E
Happy Life in University
data structures
,
dfs and similar
,
greedy
,
trees
2300
x2084
515E
Drazil and Park
data structures
2300
x2052
1834E
MEX of LCM
binary search
,
data structures
,
implementation
,
math
,
number theory
2300
x2041
1783E
Game of the Year
brute force
,
data structures
,
math
,
number theory
2300
x2016
1919F1
Wine Factory (Easy Version)
data structures
,
greedy
2300
x2007
1654E
Arithmetic Operations
brute force
,
data structures
,
graphs
,
math
2300
x1987
1705E
Mark and Professor Koro
binary search
,
bitmasks
,
brute force
,
combinatorics
,
data structures
,
greedy
2300
x1977
1625D
Binary Spiders
bitmasks
,
data structures
,
implementation
,
math
,
sortings
,
trees
2300
x1963
1601C
Optimal Insertion
data structures
,
divide and conquer
,
dp
,
greedy
,
sortings
2300
x1913
85D
Sum of Medians
binary search
,
brute force
,
data structures
,
implementation
2300
x1905
1380E
Merging Towers
data structures
,
dsu
,
implementation
,
trees
2300
x1896
884D
Boxes And Balls
data structures
,
greedy
2300
x1869
1093G
Multidimensional Queries
bitmasks
,
data structures
2300
x1820
1552E
Colors and Intervals
constructive algorithms
,
data structures
,
greedy
,
sortings
2300
x1769
1691E
Number of Groups
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
2300
x1740
995C
Leaving the Bar
brute force
,
data structures
,
geometry
,
greedy
,
math
,
sortings
2300
x1726
1621E
New School
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
sortings
2300
x1710
1062E
Company
binary search
,
data structures
,
dfs and similar
,
greedy
,
trees
2300
x1702
1748E
Yet Another Array Counting Problem
binary search
,
data structures
,
divide and conquer
,
dp
,
flows
,
math
,
trees
2300
x1696
1268C
K Integers
binary search
,
data structures
2300
x1664
1285E
Delete a Segment
brute force
,
constructive algorithms
,
data structures
,
dp
,
graphs
,
sortings
,
trees
,
two pointers
2300
x1659
893F
Subtree Minimum Query
data structures
,
trees
2300
x1655
1728E
Red-Black Pepper
brute force
,
data structures
,
greedy
,
math
,
number theory
2300
x1645
1236D
Alice and the Doll
brute force
,
data structures
,
greedy
,
implementation
2300
x1643
1917D
Yet Another Inversions Problem
combinatorics
,
data structures
,
dp
,
implementation
,
math
,
number theory
2300
x1642
1217E
Sum Queries?
data structures
,
greedy
,
implementation
,
math
2300
x1639
1929F
Sasha and the Wedding Binary Search Tree
brute force
,
combinatorics
,
data structures
,
dfs and similar
,
math
,
trees
2300
x1603
877F
Ann and Books
data structures
,
flows
,
hashing
2300
x1603
1399F
Yet Another Segments Subset
data structures
,
dp
,
graphs
,
sortings
2300
x1554
1681F
Unique Occurrences
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
dsu
,
trees
2300
x1527
1842E
Tenzing and Triangle
data structures
,
dp
,
geometry
,
greedy
,
math
2300
x1524
1304F1
Animal Observation (easy version)
data structures
,
dp
2300
x1521
677D
Vanya and Treasure
data structures
,
dp
,
graphs
,
shortest paths
2300
x1520
1805E
There Should Be a Lot of Maximums
brute force
,
data structures
,
dfs and similar
,
dp
,
trees
,
two pointers
2300
x1519
1849E
Max to the Right of Min
binary search
,
data structures
,
divide and conquer
,
dp
,
dsu
,
two pointers
2300
x1491
1927G
Paint Charges
data structures
,
dp
,
greedy
,
math
2300
x1476
1843F2
Omsk Metro (hard version)
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
math
,
trees
2300
x1464
1276C
Beautiful Rectangle
brute force
,
combinatorics
,
constructive algorithms
,
data structures
,
greedy
,
math
2300
x1463
1197E
Culture Code
binary search
,
combinatorics
,
data structures
,
dp
,
shortest paths
,
sortings
2300
x1450
1895E
Infinite Card Game
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
dsu
,
games
,
graphs
,
greedy
,
sortings
,
two pointers
2300
x1449
610D
Vika and Segments
constructive algorithms
,
data structures
,
geometry
,
two pointers
2300
x1433
1167F
Scalar Queries
combinatorics
,
data structures
,
math
,
sortings
2300
x1428
1743F
Intersection and Union
data structures
,
dp
,
matrices
,
probabilities
2300
x1406
500E
New Year Domino
data structures
,
dp
,
dsu
2300
x1389
425D
Sereja and Squares
binary search
,
data structures
,
hashing
2300
x1386
1780F
Three Chairs
bitmasks
,
brute force
,
combinatorics
,
data structures
,
dp
,
number theory
,
sortings
2300
x1367
1864F
Exotic Queries
data structures
,
implementation
,
sortings
2300
x1306
1239C
Queue in the Train
data structures
,
greedy
,
implementation
2300
x1304
803G
Periodic RMQ Problem
data structures
2300
x1291
1781E
Rectangle Shrinking
binary search
,
brute force
,
data structures
,
greedy
,
implementation
,
two pointers
2300
x1261
1814E
Chain Chips
data structures
,
dp
,
matrices
2300
x1232
1584E
Game with Stones
binary search
,
data structures
,
games
,
greedy
2300
x1215
1914G2
Light Bulbs (Hard Version)
combinatorics
,
data structures
,
dfs and similar
,
dp
,
graphs
,
hashing
2300
x1207
830C
Bamboo Partition
brute force
,
data structures
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2300
x1181
1797E
Li Hua and Array
brute force
,
data structures
,
dsu
,
math
,
number theory
,
two pointers
2300
x1179
901C
Bipartite Segments
binary search
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
two pointers
2300
x1131
1766E
Decomposition
binary search
,
brute force
,
data structures
,
divide and conquer
,
dp
,
two pointers
2300
x1123
727E
Games on a CD
data structures
,
hashing
,
string suffix structures
,
strings
2300
x1112
558D
Guess Your Way Out! II
data structures
,
implementation
,
sortings
2300
x1105
1878G
wxhtzdy ORO Tree
binary search
,
bitmasks
,
brute force
,
data structures
,
dfs and similar
,
implementation
,
trees
2300
x1083
1379D
New Passenger Trams
binary search
,
brute force
,
data structures
,
sortings
,
two pointers
2300
x1057
557E
Ann and Half-Palindrome
data structures
,
dp
,
graphs
,
string suffix structures
,
strings
,
trees
2300
x1049
878B
Teams Formation
data structures
,
implementation
2300
x1027
629E
Famil Door and Roads
combinatorics
,
data structures
,
dfs and similar
,
dp
,
probabilities
,
trees
2300
x966
1200F
Graph Traveler
brute force
,
data structures
,
dfs and similar
,
dp
,
graphs
,
implementation
,
math
,
number theory
2300
x909
895E
Eyes Closed
data structures
,
probabilities
2300
x907
1468M
Similar Sets
data structures
,
graphs
,
implementation
2300
x903
425C
Sereja and Two Sequences
data structures
,
dp
2300
x881
1575I
Illusions of the Desert
data structures
,
trees
2300
x837
628E
Zbazi in Zeydabad
data structures
,
implementation
2300
x830
1039A
Timetable
constructive algorithms
,
data structures
,
greedy
,
math
2300
x771
467E
Alex and Complicated Task
data structures
,
dp
,
greedy
2300
x761
414D
Mashmokh and Water Tanks
binary search
,
data structures
,
greedy
,
trees
,
two pointers
2300
x673
38G
Queue
data structures
2300
x673
89C
Chip Play
brute force
,
data structures
,
implementation
2300
x609
76F
Tourist
binary search
,
data structures
,
dp
2300
x601
424D
Biathlon Track
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
2300
x554
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