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Contest is running
Codeforces Round 945 (Div. 2)
01:15:41
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Difficulty:
—
data structures
combine-tags-by-or
*combine tags by OR
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
768G
The Winds of Winter
binary search
,
data structures
3300
x353
1610G
AmShZ Wins a Bet
data structures
,
greedy
,
hashing
3300
x376
671E
Organizing a Race
data structures
,
greedy
3300
x394
639F
Bear and Chemistry
data structures
,
dfs and similar
,
graphs
,
trees
3300
x394
1172F
Nauuo and Bug
data structures
3300
x404
1340F
Nastya and CBS
brute force
,
data structures
,
hashing
3300
x470
1290E
Cartesian Tree
data structures
3300
x512
1534G
A New Beginning
data structures
,
dp
,
geometry
,
sortings
3300
x526
1270H
Number of Components
data structures
3300
x583
1063F
String Journey
data structures
,
dp
,
string suffix structures
3300
x802
576E
Painting Edges
binary search
,
data structures
3300
x1108
1967F
Next and Prev
brute force
,
data structures
,
implementation
3200
x29
1571I
Physical Examination
*special problem
,
binary search
,
data structures
3200
x54
1599E
Two Arrays
data structures
,
matrices
3200
x66
730L
Expression Queries
data structures
3200
x84
1056H
Detect Robots
data structures
,
strings
3200
x146
482E
ELCA
data structures
,
trees
3200
x175
1638F
Two Posters
brute force
,
data structures
,
greedy
,
two pointers
3200
x189
414E
Mashmokh's Designed Problem
data structures
3200
x191
1830F
The Third Grace
data structures
,
dp
3200
x221
1007D
Ants
2-sat
,
data structures
,
trees
3200
x257
1540D
Inverse Inversions
binary search
,
brute force
,
data structures
3200
x262
1446F
Line Distance
binary search
,
data structures
,
geometry
3200
x272
1416E
Split
binary search
,
data structures
,
dp
,
greedy
3200
x277
543E
Listening to Music
constructive algorithms
,
data structures
3200
x280
1214G
Feeling Good
bitmasks
,
data structures
3200
x281
1109F
Sasha and Algorithm of Silence's Sounds
data structures
,
trees
3200
x281
1470E
Strange Permutation
binary search
,
combinatorics
,
data structures
,
dp
,
graphs
,
implementation
,
two pointers
3200
x293
1712F
Triameter
binary search
,
data structures
,
dfs and similar
,
trees
3200
x305
494E
Sharti
data structures
,
games
3200
x307
1427F
Boring Card Game
data structures
,
greedy
,
trees
3200
x308
1284F
New Year and Social Network
data structures
,
graph matchings
,
graphs
,
math
,
trees
3200
x309
1019E
Raining season
data structures
,
divide and conquer
,
trees
3200
x328
1774G
Segment Covering
brute force
,
combinatorics
,
constructive algorithms
,
data structures
,
dp
,
trees
3200
x367
1859F
Teleportation in Byteland
data structures
,
dfs and similar
,
divide and conquer
,
graphs
,
shortest paths
,
trees
3200
x371
1209G2
Into Blocks (hard version)
data structures
3200
x378
1648E
Air Reform
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
graphs
,
implementation
,
trees
3200
x384
827F
Dirty Arkady's Kitchen
data structures
,
dp
,
graphs
,
shortest paths
3200
x385
1368G
Shifting Dominoes
data structures
,
geometry
,
graphs
,
trees
3200
x398
1523G
Try Booking
data structures
,
divide and conquer
3200
x403
1495E
Qingshan and Daniel
brute force
,
data structures
,
greedy
,
implementation
3200
x406
1656H
Equal LCM Subsets
data structures
,
math
,
number theory
3200
x416
1286E
Fedya the Potter Strikes Back
data structures
,
strings
3200
x489
650E
Clockwork Bomb
data structures
,
dfs and similar
,
dsu
,
greedy
,
trees
3200
x586
786E
ALT
data structures
,
flows
,
graphs
,
trees
3200
x602
1621G
Weighted Increasing Subsequences
data structures
,
dp
,
math
3200
x623
538H
Summer Dichotomy
2-sat
,
data structures
,
dfs and similar
,
greedy
3200
x628
1017G
The Tree
data structures
3200
x815
643G
Choosing Ads
data structures
3200
x916
1037H
Security
data structures
,
string suffix structures
3200
x984
573E
Bear and Bowling
data structures
,
greedy
3200
x1340
487E
Tourists
data structures
,
dfs and similar
,
graphs
,
trees
3200
x2144
1488J
Flower Shop
*special problem
,
data structures
,
fft
,
math
3100
x31
1866F
Freak Joker Process
binary search
,
data structures
,
sortings
3100
x120
542B
Duck Hunt
data structures
3100
x125
477E
Dreamoon and Notepad
data structures
3100
x131
720F
Array Covering
data structures
3100
x144
1895G
Two Characters, Two Colors
binary search
,
data structures
,
dp
,
flows
,
greedy
3100
x173
1499G
Graph Coloring
data structures
,
graphs
,
interactive
3100
x186
792F
Mages and Monsters
data structures
,
geometry
3100
x200
1578J
Just Kingdom
brute force
,
data structures
,
dfs and similar
3100
x217
720D
Slalom
data structures
,
dp
,
sortings
3100
x224
1767F
Two Subtrees
data structures
,
trees
3100
x248
1120F
Secret Letters
data structures
,
dp
,
greedy
3100
x249
1930G
Prefix Max Set Counting
data structures
,
dp
,
trees
3100
x253
960H
Santa's Gift
data structures
,
trees
3100
x255
981H
K Paths
combinatorics
,
data structures
,
dp
,
fft
,
math
3100
x265
1344E
Train Tracks
data structures
,
trees
3100
x268
1332G
No Monotone Triples
data structures
3100
x282
418E
Tricky Password
data structures
3100
x294
1508E
Tree Calendar
brute force
,
constructive algorithms
,
data structures
,
dfs and similar
,
sortings
,
trees
3100
x327
1566G
Four Vertices
constructive algorithms
,
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
3100
x329
1329D
Dreamoon Likes Strings
constructive algorithms
,
data structures
3100
x369
536E
Tavas on the Path
data structures
,
divide and conquer
,
trees
3100
x371
1458E
Nim Shortcuts
data structures
,
games
3100
x404
1936D
Bitwise Paradox
binary search
,
bitmasks
,
data structures
,
greedy
,
two pointers
3100
x419
855F
Nagini
binary search
,
data structures
3100
x419
1610H
Squid Game
data structures
,
dfs and similar
,
greedy
,
trees
3100
x421
700D
Huffman Coding on Segment
data structures
,
greedy
3100
x452
626G
Raffles
data structures
,
dp
,
greedy
,
math
3100
x517
1476G
Minimum Difference
data structures
,
hashing
,
sortings
,
two pointers
3100
x530
1286D
LCC
data structures
,
math
,
matrices
,
probabilities
3100
x557
633H
Fibonacci-ish II
data structures
,
implementation
3100
x570
571D
Campus
binary search
,
data structures
,
dsu
,
trees
3100
x648
453E
Little Pony and Lord Tirek
data structures
3100
x656
679E
Bear and Bad Powers of 42
data structures
3100
x662
407E
k-d-sequence
data structures
3100
x686
1628E
Groceries in Meteor Town
binary search
,
data structures
,
dsu
,
trees
3100
x830
1458D
Flip and Reverse
data structures
,
graphs
,
greedy
3100
x979
176E
Archaeology
data structures
,
dfs and similar
,
trees
3100
x1029
666E
Forensic Examination
data structures
,
string suffix structures
3100
x1328
765F
Souvenirs
data structures
3100
x1860
896E
Welcome home, Chtholly
data structures
,
dsu
3100
x1971
175F
Gnomes of Might and Magic
data structures
,
graphs
,
implementation
,
shortest paths
3000
x64
1218B
Guarding warehouses
data structures
,
geometry
3000
x68
185E
Soap Time! - 2
binary search
,
data structures
3000
x103
1672I
PermutationForces
data structures
,
greedy
3000
x137
1758F
Decent Division
constructive algorithms
,
data structures
3000
x154
1575C
Cyclic Sum
data structures
,
fft
,
number theory
3000
x155
331D3
Escaping on Beaveractor
data structures
,
implementation
,
trees
3000
x170
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