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Contest is running
Codeforces Round 941 (Div. 1)
00:14:36
Contest is running
Codeforces Round 941 (Div. 2)
00:14:37
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combine-tags-by-or
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633E
Startup Funding
binary search
,
constructive algorithms
,
data structures
,
probabilities
,
two pointers
2400
x567
323C
Two permutations
data structures
2400
x567
665F
Four Divisors
data structures
,
dp
,
math
,
number theory
,
sortings
,
two pointers
2400
x576
160E
Buses and People
binary search
,
data structures
,
sortings
2400
x576
845E
Fire in the City
binary search
,
data structures
2400
x577
28D
Don't fear, DravDe is kind
binary search
,
data structures
,
dp
,
hashing
2400
x582
1163E
Magical Permutation
bitmasks
,
brute force
,
constructive algorithms
,
data structures
,
graphs
,
math
2400
x644
256E
Lucky Arrays
data structures
2400
x653
200A
Cinema
brute force
,
data structures
2400
x656
1080F
Katya and Segments Sets
data structures
,
interactive
,
sortings
2400
x669
1166F
Vicky's Delivery Service
data structures
,
dsu
,
graphs
,
hashing
2400
x685
639D
Bear and Contribution
data structures
,
greedy
,
sortings
,
two pointers
2400
x779
1777F
Comfortably Numb
bitmasks
,
data structures
,
divide and conquer
,
strings
,
trees
2400
x814
1146E
Hot is Cold
bitmasks
,
data structures
,
divide and conquer
,
implementation
2400
x822
1263F
Economic Difficulties
data structures
,
dfs and similar
,
dp
,
flows
,
graphs
,
trees
2400
x833
226C
Anniversary
data structures
,
implementation
,
math
,
matrices
,
number theory
2400
x842
611E
New Year and Three Musketeers
data structures
,
greedy
,
sortings
2400
x854
733E
Sleep in Class
constructive algorithms
,
data structures
,
math
,
two pointers
2400
x860
1725L
Lemper Cooking Competition
data structures
2400
x863
939F
Cutlet
data structures
,
dp
2400
x873
1902F
Trees and XOR Queries Again
data structures
,
dfs and similar
,
divide and conquer
,
graphs
,
implementation
,
math
,
trees
2400
x887
1129C
Morse Code
binary search
,
data structures
,
dp
,
hashing
,
sortings
,
string suffix structures
,
strings
2400
x896
1099F
Cookies
binary search
,
data structures
,
dfs and similar
,
dp
,
games
,
trees
2400
x907
1132G
Greedy Subsequences
data structures
,
dp
,
trees
2400
x952
1044D
Deduction Queries
data structures
,
dsu
2400
x968
1221F
Choose a Square
binary search
,
data structures
,
sortings
2400
x973
1091E
New Year and the Acquaintance Estimation
binary search
,
data structures
,
graphs
,
greedy
,
implementation
,
math
,
sortings
2400
x974
1107G
Vasya and Maximum Profit
binary search
,
constructive algorithms
,
data structures
,
dp
,
dsu
2400
x986
1282E
The Cake Is a Lie
constructive algorithms
,
data structures
,
dfs and similar
,
graphs
2400
x990
707E
Garlands
data structures
2400
x1000
1794E
Labeling the Tree with Distances
data structures
,
dp
,
greedy
,
hashing
,
implementation
,
trees
2400
x1003
1004E
Sonya and Ice Cream
binary search
,
data structures
,
dp
,
greedy
,
shortest paths
,
trees
2400
x1007
1585E
Frequency Queries
data structures
,
dfs and similar
,
trees
2400
x1011
1774F1
Magician and Pigs (Easy Version)
brute force
,
data structures
,
implementation
2400
x1018
1735E
House Planning
constructive algorithms
,
data structures
,
graph matchings
,
greedy
2400
x1021
452E
Three strings
data structures
,
dsu
,
string suffix structures
,
strings
2400
x1025
749E
Inversions After Shuffle
data structures
,
probabilities
2400
x1026
258E
Little Elephant and Tree
data structures
,
dfs and similar
,
trees
2400
x1026
1936C
Pokémon Arena
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
2400
x1058
498D
Traffic Jams in the Land
data structures
,
dp
,
number theory
2400
x1061
1619H
Permutation and Queries
brute force
,
data structures
,
divide and conquer
,
two pointers
2400
x1065
1089K
King Kog's Reception
data structures
2400
x1078
377D
Developing Game
data structures
2400
x1079
601D
Acyclic Organic Compounds
data structures
,
dfs and similar
,
dsu
,
hashing
,
strings
,
trees
2400
x1088
1632E1
Distance Tree (easy version)
binary search
,
data structures
,
dfs and similar
,
graphs
,
shortest paths
,
trees
2400
x1108
1264C
Beautiful Mirrors with queries
data structures
,
probabilities
2400
x1120
1935E
Distance Learning Courses in MAC
bitmasks
,
brute force
,
data structures
,
greedy
,
math
2400
x1147
524E
Rooks and Rectangles
data structures
,
sortings
2400
x1151
593D
Happy Tree Party
data structures
,
dfs and similar
,
graphs
,
math
,
trees
2400
x1178
1736C2
Good Subarrays (Hard Version)
binary search
,
data structures
,
dp
,
two pointers
2400
x1230
1343F
Restore the Permutation by Sorted Segments
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x1230
1042F
Leaf Sets
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
,
trees
2400
x1237
1304F2
Animal Observation (hard version)
data structures
,
dp
,
greedy
2400
x1274
1860E
Fast Travel Text Editor
data structures
,
dfs and similar
,
graphs
,
shortest paths
2400
x1294
1780E
Josuke and Complete Graph
binary search
,
brute force
,
data structures
,
math
,
number theory
2400
x1297
1598F
RBS
binary search
,
bitmasks
,
brute force
,
data structures
,
dp
2400
x1322
220E
Little Elephant and Inversions
data structures
,
two pointers
2400
x1327
1059E
Split the Tree
binary search
,
data structures
,
dp
,
greedy
,
trees
2400
x1351
1750E
Bracket Cost
binary search
,
data structures
,
divide and conquer
,
dp
,
greedy
,
strings
2400
x1356
115E
Linear Kingdom Races
data structures
,
dp
2400
x1357
1732D2
Balance (Hard version)
brute force
,
data structures
,
number theory
2400
x1360
914E
Palindromes in a Tree
bitmasks
,
data structures
,
divide and conquer
,
trees
2400
x1376
1615E
Purple Crayon
data structures
,
dfs and similar
,
games
,
graphs
,
greedy
,
math
,
sortings
,
trees
2400
x1394
1367F2
Flying Sort (Hard Version)
binary search
,
data structures
,
dp
,
greedy
,
sortings
,
two pointers
2400
x1440
1852C
Ina of the Mountain
data structures
,
dp
,
greedy
,
math
2400
x1445
1633E
Spanning Tree Queries
binary search
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
,
sortings
,
trees
2400
x1455
869E
The Untended Antiquity
data structures
,
hashing
2400
x1466
1093E
Intersection of Permutations
data structures
2400
x1482
1826E
Walk the Runway
bitmasks
,
brute force
,
data structures
,
dp
,
graphs
,
implementation
,
sortings
2400
x1493
1329C
Drazil Likes Heap
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x1502
1713E
Cross Swapping
2-sat
,
data structures
,
dsu
,
greedy
,
matrices
2400
x1510
1401F
Reverse and Swap
binary search
,
bitmasks
,
data structures
2400
x1510
1718C
Tonya and Burenka-179
data structures
,
greedy
,
math
,
number theory
2400
x1512
916E
Jamie and Tree
data structures
,
trees
2400
x1551
1887C
Minimum Array
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
hashing
,
two pointers
2400
x1560
1634E
Fair Share
constructive algorithms
,
data structures
,
dfs and similar
,
graph matchings
,
graphs
2400
x1595
1715E
Long Way Home
data structures
,
divide and conquer
,
dp
,
geometry
,
graphs
,
greedy
,
shortest paths
2400
x1596
121E
Lucky Array
data structures
2400
x1605
1373F
Network Coverage
binary search
,
constructive algorithms
,
data structures
,
greedy
2400
x1618
525D
Arthur and Walls
constructive algorithms
,
data structures
,
graphs
,
greedy
,
shortest paths
2400
x1631
1706D2
Chopping Carrots (Hard Version)
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
2400
x1649
1494E
A-Z Graph
constructive algorithms
,
data structures
,
graphs
,
hashing
2400
x1652
710F
String Set Queries
brute force
,
data structures
,
hashing
,
interactive
,
string suffix structures
,
strings
2400
x1667
1720D2
Xor-Subsequence (hard version)
bitmasks
,
data structures
,
dp
,
strings
,
trees
2400
x1726
1827B2
Range Sorting (Hard Version)
binary search
,
data structures
,
dp
,
greedy
2400
x1756
1638E
Colorful Operations
brute force
,
data structures
,
implementation
2400
x1787
1114F
Please, another Queries on Array?
bitmasks
,
data structures
,
divide and conquer
,
math
,
number theory
2400
x1808
1609E
William The Oblivious
bitmasks
,
data structures
,
dp
,
matrices
2400
x1835
1485F
Copy or Prefix Sum
combinatorics
,
data structures
,
dp
,
sortings
2400
x1862
1408E
Avoid Rainbow Cycles
data structures
,
dsu
,
graphs
,
greedy
,
sortings
,
trees
2400
x1874
1392F
Omkar and Landslide
binary search
,
constructive algorithms
,
data structures
,
greedy
,
math
2400
x1940
1326E
Bombs
data structures
,
two pointers
2400
x1953
12D
Ball
data structures
,
sortings
2400
x1977
5E
Bindian Signalizing
data structures
2400
x2004
1369E
DeadLee
data structures
,
dfs and similar
,
greedy
,
implementation
,
sortings
2400
x2013
1837F
Editorial for Two
binary search
,
data structures
,
greedy
,
implementation
2400
x2057
1358E
Are You Fired?
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x2077
1436E
Complicated Computations
binary search
,
data structures
,
two pointers
2400
x2108
379F
New Year Tree
data structures
,
divide and conquer
,
trees
2400
x2111
1401E
Divide Square
data structures
,
geometry
,
implementation
,
sortings
2400
x2152
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