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Codeforces Round (Div. 2)
4 days
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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
370E
Summer Reading
dp
,
greedy
2500
x233
370D
Broken Monitor
brute force
,
constructive algorithms
,
greedy
,
implementation
2100
x621
370C
Mittens
constructive algorithms
,
greedy
,
sortings
1800
x1513
370B
Berland Bingo
implementation
1300
x2484
370A
Rook, Bishop and King
graphs
,
math
,
shortest paths
1100
x10013
369E
Valera and Queries
binary search
,
data structures
2200
x2071
369D
Valera and Fools
dfs and similar
,
dp
,
graphs
,
shortest paths
2200
x1105
369C
Valera and Elections
dfs and similar
,
graphs
,
trees
1600
x9586
369B
Valera and Contest
constructive algorithms
,
implementation
,
math
1400
x6333
369A
Valera and Plates
greedy
,
implementation
900
x10862
368B
Sereja and Suffixes
data structures
,
dp
1100
x40153
368A
Sereja and Coat Rack
implementation
1000
x7417
367E
Sereja and Intervals
combinatorics
,
dp
2700
x1077
367D
Sereja and Sets
bitmasks
,
dfs and similar
2400
x618
367C
Sereja and the Arrangement of Numbers
graphs
,
greedy
,
sortings
2000
x1723
367B
Sereja ans Anagrams
binary search
,
data structures
1900
x2428
367A
Sereja and Algorithm
data structures
,
implementation
1500
x4296
366E
Dima and Magic Guitar
brute force
,
implementation
,
math
2200
x754
366D
Dima and Trap Graph
binary search
,
data structures
,
dfs and similar
,
dsu
,
shortest paths
,
two pointers
2000
x1355
366C
Dima and Salad
dp
1900
x4609
366B
Dima and To-do List
brute force
,
implementation
1200
x6768
366A
Dima and Guards
implementation
1100
x4494
365B
The Fibonacci Segment
implementation
1100
x14186
365A
Good Number
implementation
1100
x17805
364E
Empty Rectangles
divide and conquer
,
two pointers
3000
x538
364D
Ghd
brute force
,
math
,
probabilities
2900
x1999
364C
Beautiful Set
brute force
,
number theory
2300
x587
364B
Free Market
dp
,
greedy
2200
x1152
364A
Matrix
combinatorics
,
data structures
,
implementation
1600
x4630
363E
Two Circles
brute force
,
data structures
,
implementation
2500
x193
363D
Renting Bikes
binary search
,
greedy
1800
x3772
363C
Fixing Typos
greedy
,
implementation
1400
x13157
363B
Fence
brute force
,
dp
1100
x50587
363A
Soroban
implementation
800
x10580
362E
Petya and Pipes
flows
,
graphs
,
shortest paths
2300
x802
362D
Fools and Foolproof Roads
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
2100
x912
362C
Insertion Sort
data structures
,
dp
,
implementation
,
math
1900
x1669
362B
Petya and Staircases
implementation
,
sortings
1100
x13623
362A
Two Semiknights Meet
greedy
,
math
1500
x2642
361B
Levko and Permutation
constructive algorithms
,
math
,
number theory
1200
x7938
361A
Levko and Table
constructive algorithms
,
implementation
800
x16391
360E
Levko and Game
graphs
,
greedy
,
shortest paths
2800
x682
360D
Levko and Sets
number theory
2600
x395
360C
Levko and Strings
combinatorics
,
dp
2500
x1072
360B
Levko and Array
binary search
,
dp
2000
x2738
360A
Levko and Array Recovery
greedy
,
implementation
1700
x2033
359E
Neatness
constructive algorithms
,
dfs and similar
2400
x461
359D
Pair of Numbers
binary search
,
brute force
,
data structures
,
math
,
two pointers
2000
x4942
359C
Prime Number
math
,
number theory
1900
x2959
359B
Permutation
constructive algorithms
,
dp
,
math
1400
x7789
359A
Table
constructive algorithms
,
greedy
,
implementation
1000
x8438
358E
Dima and Kicks
brute force
,
dsu
,
graphs
,
implementation
2300
x390
358D
Dima and Hares
dp
,
greedy
1800
x3925
358C
Dima and Containers
constructive algorithms
,
greedy
,
implementation
2000
x1968
358B
Dima and Text Messages
brute force
,
strings
1500
x3697
358A
Dima and Continuous Line
brute force
,
implementation
1400
x7646
357B
Flag Day
constructive algorithms
,
implementation
1400
x8090
357A
Group of Students
brute force
,
greedy
,
implementation
1000
x6752
356E
Xenia and String Problem
dp
,
hashing
,
implementation
,
string suffix structures
,
strings
3000
x405
356D
Bags and Coins
bitmasks
,
constructive algorithms
,
dp
,
greedy
2700
x942
356C
Compartments
combinatorics
,
constructive algorithms
,
greedy
,
implementation
2100
x1238
356B
Xenia and Hamming
implementation
,
math
1900
x1892
356A
Knight Tournament
data structures
,
dsu
1500
x13089
355B
Vasya and Public Transport
greedy
,
implementation
1100
x4460
355A
Vasya and Digital Root
constructive algorithms
,
implementation
1100
x9316
354E
Lucky Number Representation
constructive algorithms
,
dfs and similar
,
dp
2200
x873
354D
Transferring Pyramid
dp
2900
x443
354C
Vasya and Beautiful Arrays
brute force
,
dp
,
number theory
2100
x3014
354B
Game with Strings
bitmasks
,
dp
,
games
2400
x450
354A
Vasya and Robot
brute force
,
greedy
,
math
1500
x5440
353E
Antichain
dp
,
graph matchings
,
greedy
2200
x573
353D
Queue
constructive algorithms
,
dp
2000
x2757
353C
Find Maximum
implementation
,
math
,
number theory
1600
x4771
353B
Two Heaps
combinatorics
,
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
1900
x2203
353A
Domino
implementation
,
math
1200
x18055
352B
Jeff and Periods
implementation
,
sortings
1300
x16040
352A
Jeff and Digits
brute force
,
implementation
,
math
1000
x24970
351E
Jeff and Permutation
greedy
2200
x1515
351D
Jeff and Removing Periods
data structures
2700
x1022
351C
Jeff and Brackets
dp
,
matrices
2500
x541
351B
Jeff and Furik
combinatorics
,
dp
,
probabilities
1900
x2304
351A
Jeff and Rounding
dp
,
greedy
,
implementation
,
math
1800
x2863
350E
Wrong Floyd
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
2200
x751
350D
Looking for Owls
binary search
,
data structures
,
geometry
,
hashing
,
sortings
2400
x258
350C
Bombs
greedy
,
implementation
,
sortings
1600
x6488
350B
Resort
graphs
1500
x3098
350A
TL
brute force
,
greedy
,
implementation
1200
x16122
349B
Color the Fence
data structures
,
dp
,
greedy
,
implementation
1700
x13596
349A
Cinema Line
greedy
,
implementation
1100
x29131
348E
Pilgrims
dfs and similar
,
dp
,
trees
2800
x429
348D
Turtles
dp
,
matrices
2500
x1635
348C
Subset Sums
brute force
,
data structures
2500
x2122
348B
Apple Tree
dfs and similar
,
number theory
,
trees
2100
x2059
348A
Mafia
binary search
,
math
,
sortings
1600
x12761
347B
Fixed Points
brute force
,
implementation
,
math
1100
x9199
347A
Difference Row
constructive algorithms
,
implementation
,
sortings
1300
x8836
346E
Doodle Jump
math
,
number theory
3000
x257
346D
Robot Control
dp
,
graphs
,
shortest paths
2600
x706
346C
Number Transformation II
greedy
,
math
2200
x1425
346B
Lucky Common Subsequence
dp
,
strings
2000
x3382
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