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Codeforces Round (Div. 1 + Div. 2)
44:34:10
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graphs
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
605B
Lazy Student
constructive algorithms
,
data structures
,
graphs
1700
x3389
601A
The Two Routes
graphs
,
shortest paths
1600
x11472
600F
Edge coloring of bipartite graph
graphs
2800
x736
598D
Igor In the Museum
dfs and similar
,
graphs
,
shortest paths
1700
x10558
596E
Wilbur and Strings
dfs and similar
,
dp
,
graphs
,
strings
2500
x388
593D
Happy Tree Party
data structures
,
dfs and similar
,
graphs
,
math
,
trees
2400
x1179
592D
Super M
dfs and similar
,
dp
,
graphs
,
trees
2200
x2357
590C
Three States
dfs and similar
,
graphs
,
shortest paths
2200
x2675
585B
Phillip and Trains
dfs and similar
,
graphs
,
shortest paths
1700
x3488
580C
Kefa and Park
dfs and similar
,
graphs
,
trees
1500
x40006
575B
Bribes
dfs and similar
,
graphs
,
trees
2200
x1039
574B
Bear and Three Musketeers
brute force
,
dfs and similar
,
graphs
,
hashing
1500
x7618
571C
CNF 2
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
2500
x611
570D
Tree Requests
binary search
,
bitmasks
,
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2200
x6708
567E
President and Roads
dfs and similar
,
graphs
,
hashing
,
shortest paths
2200
x1646
558C
Amr and Chemistry
brute force
,
graphs
,
greedy
,
math
,
shortest paths
1900
x3937
557E
Ann and Half-Palindrome
data structures
,
dp
,
graphs
,
string suffix structures
,
strings
,
trees
2300
x1059
557D
Vitaly and Cycle
combinatorics
,
dfs and similar
,
graphs
,
math
2000
x2141
555E
Case of Computer Network
dfs and similar
,
graphs
,
trees
2800
x2196
553E
Kyoya and Train
dp
,
fft
,
graphs
,
math
,
probabilities
3200
x537
553D
Nudist Beach
binary search
,
graphs
,
greedy
2300
x982
553C
Love Triangles
dfs and similar
,
dsu
,
graphs
2200
x1737
550D
Regular Bridge
constructive algorithms
,
graphs
,
implementation
1900
x3247
549B
Looksery Party
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
2300
x1476
547D
Mike and Fish
constructive algorithms
,
dfs and similar
,
graphs
2600
x2430
546E
Soldier and Traveling
flows
,
graphs
,
math
2100
x3491
545E
Paths and Trees
graphs
,
greedy
,
shortest paths
2000
x4400
543B
Destroying Roads
constructive algorithms
,
graphs
,
shortest paths
2100
x3842
542E
Playing on Graph
graphs
,
shortest paths
2600
x809
542C
Idempotent functions
constructive algorithms
,
graphs
,
math
2000
x1099
533B
Work Group
dfs and similar
,
dp
,
graphs
,
strings
,
trees
2000
x2305
527E
Data Center Drama
dfs and similar
,
graphs
2600
x1812
525D
Arthur and Walls
constructive algorithms
,
data structures
,
graphs
,
greedy
,
shortest paths
2400
x1640
522A
Reposts
*special problem
,
dfs and similar
,
dp
,
graphs
,
trees
1200
x15750
521E
Cycling City
dfs and similar
,
graphs
3100
x918
520B
Two Buttons
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
,
shortest paths
1400
x48188
510C
Fox And Names
dfs and similar
,
graphs
,
sortings
1600
x15208
508D
Tanya and Password
dfs and similar
,
graphs
2500
x3103
507E
Breaking Good
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x2595
506D
Mr. Kitayuta's Colorful Graph
brute force
,
dfs and similar
,
dsu
,
graphs
2400
x2032
505B
Mr. Kitayuta's Colorful Graph
dfs and similar
,
dp
,
dsu
,
graphs
1400
x12120
500D
New Year Santa Network
combinatorics
,
dfs and similar
,
graphs
,
trees
1900
x3069
500B
New Year Permutation
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
,
sortings
1600
x8719
500A
New Year Transportation
dfs and similar
,
graphs
,
implementation
1000
x50474
489D
Unbearable Controversy of Being
brute force
,
combinatorics
,
dfs and similar
,
graphs
1700
x6551
487E
Tourists
data structures
,
dfs and similar
,
graphs
,
trees
3200
x2148
480D
Parcels
dp
,
graphs
2600
x452
475B
Strongly Connected City
brute force
,
dfs and similar
,
graphs
,
implementation
1400
x8254
467D
Fedor and Essay
dfs and similar
,
dp
,
graphs
,
hashing
,
strings
2400
x1769
466E
Information Graph
dfs and similar
,
dsu
,
graphs
,
trees
2100
x2063
464E
The Classic Problem
data structures
,
graphs
,
shortest paths
3000
x1312
463D
Gargari and Permutations
dfs and similar
,
dp
,
graphs
,
implementation
1900
x5930
453C
Little Pony and Summer Sun Celebration
constructive algorithms
,
dfs and similar
,
graphs
2200
x1570
449B
Jzzhu and Cities
graphs
,
greedy
,
shortest paths
2000
x8062
441D
Valera and Swaps
constructive algorithms
,
dsu
,
graphs
,
implementation
,
math
,
string suffix structures
2100
x1062
437C
The Child and Toy
graphs
,
greedy
,
sortings
1400
x13535
436C
Dungeons and Candies
dsu
,
graphs
,
greedy
,
trees
1800
x2582
429E
Points and Segments
graphs
3000
x835
427C
Checkposts
dfs and similar
,
graphs
,
two pointers
1700
x13014
420C
Bug in Code
data structures
,
graphs
,
implementation
,
two pointers
1900
x1220
418D
Big Problems for Organizers
data structures
,
graphs
,
trees
2800
x468
417C
Football
constructive algorithms
,
graphs
,
implementation
1400
x4610
416E
President's Path
dp
,
graphs
,
shortest paths
2500
x1392
405E
Graph Cutting
dfs and similar
,
graphs
2300
x1336
404C
Restore Graph
dfs and similar
,
graphs
,
sortings
1800
x5020
402E
Strictly Positive Matrix
graphs
,
math
2200
x2083
402C
Searching for Graph
brute force
,
constructive algorithms
,
graphs
1500
x5705
400D
Dima and Bacteria
dsu
,
graphs
,
shortest paths
2000
x2803
396C
On Changing Tree
data structures
,
graphs
,
trees
x1527
388B
Fox and Minimal path
bitmasks
,
constructive algorithms
,
graphs
,
implementation
,
math
1900
x2438
386D
Game with Points
dp
,
graphs
,
implementation
,
shortest paths
2100
x413
382D
Ksenia and Pawns
dfs and similar
,
graphs
,
implementation
,
trees
2200
x653
380B
Sereja and Tree
graphs
,
implementation
2400
x530
374C
Inna and Dima
dfs and similar
,
dp
,
graphs
,
implementation
1900
x2662
370A
Rook, Bishop and King
graphs
,
math
,
shortest paths
1100
x9941
369D
Valera and Fools
dfs and similar
,
dp
,
graphs
,
shortest paths
2200
x1095
369C
Valera and Elections
dfs and similar
,
graphs
,
trees
1600
x9479
367C
Sereja and the Arrangement of Numbers
graphs
,
greedy
,
sortings
2000
x1705
362E
Petya and Pipes
flows
,
graphs
,
shortest paths
2300
x796
362D
Fools and Foolproof Roads
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
2100
x896
360E
Levko and Game
graphs
,
greedy
,
shortest paths
2800
x676
358E
Dima and Kicks
brute force
,
dsu
,
graphs
,
implementation
2300
x386
350E
Wrong Floyd
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
2200
x750
350B
Resort
graphs
1500
x3087
346D
Robot Control
dp
,
graphs
,
shortest paths
2600
x696
345D
Chain Letter
*special problem
,
dfs and similar
,
graphs
2200
x76
344B
Simple Molecules
brute force
,
graphs
,
math
1200
x8693
343E
Pumping Stations
brute force
,
dfs and similar
,
divide and conquer
,
flows
,
graphs
,
greedy
,
trees
2900
x688
343D
Water Tree
data structures
,
dfs and similar
,
graphs
,
trees
2100
x5504
339C
Xenia and Weights
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
1700
x8151
332D
Theft of Blueprints
graphs
,
math
2400
x381
331E1
Deja Vu
constructive algorithms
,
graphs
,
implementation
2900
x162
331D2
Escaping on Beaveractor
graphs
2600
x131
330B
Road Construction
constructive algorithms
,
graphs
1300
x16395
327D
Block Tower
constructive algorithms
,
dfs and similar
,
graphs
1900
x2221
325E
The Red Button
combinatorics
,
dfs and similar
,
dsu
,
graphs
,
greedy
2800
x752
325C
Monsters and Diamonds
dfs and similar
,
graphs
,
shortest paths
2600
x331
323B
Tournament-graph
constructive algorithms
,
graphs
2200
x365
320B
Ping-Pong (Easy Version)
dfs and similar
,
graphs
1500
x7101
317C
Balance
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2500
x490
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