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Before contest
Codeforces Round 941 (Div. 1)
00:11:11
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*has extra registration
Before contest
Codeforces Round 941 (Div. 2)
00:11:11
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→ Filter Problems
Difficulty:
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dfs and similar
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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Custom test
Problems
#
Name
267B
Dominoes
dfs and similar
,
graphs
2000
x608
263D
Cycle in Graph
dfs and similar
,
graphs
1800
x3227
263C
Circle of Numbers
brute force
,
dfs and similar
,
implementation
2000
x1051
258E
Little Elephant and Tree
data structures
,
dfs and similar
,
trees
2400
x1026
254D
Rats
brute force
,
dfs and similar
,
graphs
,
implementation
,
shortest paths
2300
x497
253C
Text Editor
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1600
x2518
251E
Tree and Table
dfs and similar
,
dp
,
implementation
,
trees
3000
x168
246E
Blood Cousins Return
binary search
,
data structures
,
dfs and similar
,
dp
,
sortings
2400
x2947
246D
Colorful Graph
brute force
,
dfs and similar
,
graphs
1600
x9182
244B
Undoubtedly Lucky Numbers
bitmasks
,
brute force
,
dfs and similar
1600
x4364
243C
Colorado Potato Beetle
dfs and similar
,
implementation
2200
x519
242D
Dispute
dfs and similar
,
graphs
,
greedy
2100
x1805
242C
King's Path
dfs and similar
,
graphs
,
hashing
,
shortest paths
1800
x7989
240E
Road Repairs
dfs and similar
,
graphs
,
greedy
2800
x345
238C
World Eater Brothers
dfs and similar
,
dp
,
greedy
,
trees
2100
x1018
237D
T-decomposition
dfs and similar
,
graphs
,
greedy
,
trees
2000
x542
231E
Cactus
data structures
,
dfs and similar
,
dp
,
graphs
,
trees
2100
x1536
228E
The Road to Berland is Paved With Good Intentions
2-sat
,
dfs and similar
,
dsu
,
graphs
1900
x2332
225D
Snake
bitmasks
,
dfs and similar
,
graphs
,
implementation
2200
x911
219D
Choosing Capital for Treeland
dfs and similar
,
dp
,
graphs
,
trees
1700
x8535
217D
Bitonix' Patrol
bitmasks
,
brute force
,
combinatorics
,
dfs and similar
,
math
2900
x245
217A
Ice Skating
brute force
,
dfs and similar
,
dsu
,
graphs
1200
x20334
216B
Forming Teams
dfs and similar
,
implementation
1700
x6078
213A
Game
dfs and similar
,
greedy
1700
x1686
212E
IT Restaurants
dfs and similar
,
dp
,
trees
1500
x1656
208E
Blood Cousins
binary search
,
data structures
,
dfs and similar
,
trees
2100
x6053
208B
Solitaire
dfs and similar
,
dp
1900
x1339
196B
Infinite Maze
dfs and similar
,
graphs
2000
x2120
191C
Fools and Roads
data structures
,
dfs and similar
,
trees
1900
x6706
190C
STL
dfs and similar
1500
x2709
187C
Weak Memory
dfs and similar
,
dsu
2000
x1297
183C
Cyclic Coloring
dfs and similar
2200
x593
177C2
Party
brute force
,
dfs and similar
,
dsu
,
graphs
1500
x2426
177C1
Party
dfs and similar
,
dsu
,
graphs
1500
x2440
176E
Archaeology
data structures
,
dfs and similar
,
trees
3100
x1019
173B
Chamber of Secrets
dfs and similar
,
shortest paths
1800
x2847
172E
BHTML+BCSS
*special problem
,
dfs and similar
,
expression parsing
2200
x267
167E
Wizards and Bets
dfs and similar
,
graphs
,
math
,
matrices
2900
x545
165E
Compatible Numbers
bitmasks
,
brute force
,
dfs and similar
,
dp
2200
x6166
164A
Variable, or There and Back Again
dfs and similar
,
graphs
1700
x973
163E
e-Government
data structures
,
dfs and similar
,
dp
,
strings
,
trees
2800
x1520
161D
Distance in Tree
dfs and similar
,
dp
,
trees
1800
x13518
160D
Edges in MST
dfs and similar
,
dsu
,
graphs
,
sortings
2300
x2349
150B
Quantity of Strings
combinatorics
,
dfs and similar
,
graphs
,
math
1600
x3947
144D
Missile Silos
data structures
,
dfs and similar
,
graphs
,
shortest paths
1900
x3774
135D
Cycle
brute force
,
dfs and similar
,
implementation
2500
x293
134B
Pairs of Numbers
brute force
,
dfs and similar
,
math
,
number theory
1900
x1906
131D
Subway
dfs and similar
,
graphs
1600
x4501
129B
Students and Shoelaces
brute force
,
dfs and similar
,
graphs
,
implementation
1200
x11662
128A
Statues
dfs and similar
1500
x3114
123E
Maze
dfs and similar
,
dp
,
probabilities
,
trees
2500
x689
118E
Bertown roads
dfs and similar
,
graphs
2000
x5965
117C
Cycle
dfs and similar
,
graphs
2000
x2541
115A
Party
dfs and similar
,
graphs
,
trees
900
x32741
107A
Dorm Water Supply
dfs and similar
,
graphs
1400
x4914
103B
Cthulhu
dfs and similar
,
dsu
,
graphs
1500
x8511
100H
Battleship
*special problem
,
dfs and similar
,
implementation
2100
x74
97E
Leaders
dfs and similar
,
dsu
,
graphs
,
trees
2200
x370
87D
Beautiful Road
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
2300
x845
85C
Petya and Tree
binary search
,
dfs and similar
,
probabilities
,
sortings
,
trees
2200
x521
82C
General Mobilization
data structures
,
dfs and similar
,
sortings
2000
x798
81E
Pairs
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
trees
2700
x325
77C
Beavermuncher-0xFF
dfs and similar
,
dp
,
dsu
,
greedy
,
trees
2100
x977
74C
Chessboard Billiard
dfs and similar
,
dsu
,
graphs
,
number theory
2100
x947
73D
FreeDiv
dfs and similar
,
graphs
,
greedy
2200
x612
65E
Harry Potter and Moving Staircases
dfs and similar
,
implementation
2900
x84
65D
Harry Potter and the Sorting Hat
brute force
,
dfs and similar
,
hashing
2200
x419
63E
Sweets Game
bitmasks
,
dfs and similar
,
dp
,
games
,
implementation
2000
x713
62D
Wormhouse
dfs and similar
,
graphs
2300
x347
61D
Eternal Victory
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
trees
1800
x6234
60C
Mushroom Strife
brute force
,
dfs and similar
2100
x549
60B
Serial Time!
dfs and similar
,
dsu
1400
x4432
57A
Square Earth?
dfs and similar
,
greedy
,
implementation
1300
x2810
51F
Caterpillar
dfs and similar
,
dp
,
graphs
,
trees
2800
x545
42E
Baldman and the military
dfs and similar
,
graphs
,
trees
2700
x187
35C
Fire Again
brute force
,
dfs and similar
,
shortest paths
1500
x6234
34D
Road Map
dfs and similar
,
graphs
1600
x4847
31D
Chocolate
dfs and similar
,
implementation
2000
x988
29D
Ant on the Tree
constructive algorithms
,
dfs and similar
,
trees
2000
x2294
29C
Mail Stamps
data structures
,
dfs and similar
,
graphs
,
implementation
1700
x4540
28B
pSort
dfs and similar
,
dsu
,
graphs
1600
x4392
27D
Ring Road 2
2-sat
,
dfs and similar
,
dsu
,
graphs
2200
x2355
27B
Tournament
bitmasks
,
brute force
,
dfs and similar
,
greedy
1300
x5133
22E
Scheme
dfs and similar
,
graphs
,
trees
2300
x1531
19E
Fairy
dfs and similar
,
divide and conquer
,
dsu
2900
x1598
17B
Hierarchy
dfs and similar
,
dsu
,
greedy
,
shortest paths
1500
x4458
14D
Two Paths
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
,
two pointers
1900
x4295
9E
Interestring graph and Apples
dfs and similar
,
dsu
,
graphs
2300
x986
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