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Codeforces Round 940 (Div. 2) and CodeCraft-23
2 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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Problems
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Status
Standings
Custom test
Problems
#
Name
374B
Inna and Nine
combinatorics
,
greedy
1500
x3228
374A
Inna and Pink Pony
greedy
,
implementation
2000
x2836
373B
Making Sequences is Fun
binary search
,
implementation
,
math
1600
x2428
373A
Collecting Beats is Fun
implementation
900
x10159
372E
Drawing Circles is Fun
combinatorics
,
geometry
3000
x168
372D
Choosing Subtree is Fun
binary search
,
data structures
,
dfs and similar
,
trees
,
two pointers
2600
x905
372C
Watching Fireworks is Fun
data structures
,
dp
,
math
2100
x3615
372B
Counting Rectangles is Fun
brute force
,
divide and conquer
,
dp
1900
x2509
372A
Counting Kangaroos is Fun
binary search
,
greedy
,
sortings
,
two pointers
1600
x12288
371E
Subway Innovation
greedy
,
math
,
two pointers
2000
x1201
371D
Vessels
data structures
,
dsu
,
implementation
,
trees
1800
x5274
371C
Hamburgers
binary search
,
brute force
1600
x23392
371B
Fox Dividing Cheese
math
,
number theory
1300
x10871
371A
K-Periodic Array
greedy
,
implementation
,
math
1000
x5927
370E
Summer Reading
dp
,
greedy
2500
x227
370D
Broken Monitor
brute force
,
constructive algorithms
,
greedy
,
implementation
2100
x604
370C
Mittens
constructive algorithms
,
greedy
,
sortings
1800
x1498
370B
Berland Bingo
implementation
1300
x2467
370A
Rook, Bishop and King
graphs
,
math
,
shortest paths
1100
x9824
369E
Valera and Queries
binary search
,
data structures
2200
x2020
369D
Valera and Fools
dfs and similar
,
dp
,
graphs
,
shortest paths
2200
x1083
369C
Valera and Elections
dfs and similar
,
graphs
,
trees
1600
x9361
369B
Valera and Contest
constructive algorithms
,
implementation
,
math
1400
x6280
369A
Valera and Plates
greedy
,
implementation
900
x10691
368B
Sereja and Suffixes
data structures
,
dp
1100
x39319
368A
Sereja and Coat Rack
implementation
1000
x7262
367E
Sereja and Intervals
combinatorics
,
dp
2700
x1060
367D
Sereja and Sets
bitmasks
,
dfs and similar
2400
x615
367C
Sereja and the Arrangement of Numbers
graphs
,
greedy
,
sortings
2000
x1697
367B
Sereja ans Anagrams
binary search
,
data structures
1900
x2400
367A
Sereja and Algorithm
data structures
,
implementation
1500
x4281
366E
Dima and Magic Guitar
brute force
,
implementation
,
math
2200
x741
366D
Dima and Trap Graph
binary search
,
data structures
,
dfs and similar
,
dsu
,
shortest paths
,
two pointers
2000
x1269
366C
Dima and Salad
dp
1900
x4510
366B
Dima and To-do List
brute force
,
implementation
1200
x6710
366A
Dima and Guards
implementation
1100
x4476
365B
The Fibonacci Segment
implementation
1100
x13994
365A
Good Number
implementation
1100
x17293
364E
Empty Rectangles
divide and conquer
,
two pointers
3000
x529
364D
Ghd
brute force
,
math
,
probabilities
2900
x1948
364C
Beautiful Set
brute force
,
number theory
2300
x580
364B
Free Market
dp
,
greedy
2200
x1145
364A
Matrix
combinatorics
,
data structures
,
implementation
1600
x4590
363E
Two Circles
brute force
,
data structures
,
implementation
2500
x191
363D
Renting Bikes
binary search
,
greedy
1800
x3733
363C
Fixing Typos
greedy
,
implementation
1400
x13037
363B
Fence
brute force
,
dp
1100
x48820
363A
Soroban
implementation
800
x10445
362E
Petya and Pipes
flows
,
graphs
,
shortest paths
2300
x792
362D
Fools and Foolproof Roads
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
2100
x891
362C
Insertion Sort
data structures
,
dp
,
implementation
,
math
1900
x1644
362B
Petya and Staircases
implementation
,
sortings
1100
x13475
362A
Two Semiknights Meet
greedy
,
math
1500
x2628
361B
Levko and Permutation
constructive algorithms
,
math
,
number theory
1200
x7870
361A
Levko and Table
constructive algorithms
,
implementation
800
x16151
360E
Levko and Game
graphs
,
greedy
,
shortest paths
2800
x673
360D
Levko and Sets
number theory
2600
x383
360C
Levko and Strings
combinatorics
,
dp
2500
x1053
360B
Levko and Array
binary search
,
dp
2000
x2693
360A
Levko and Array Recovery
greedy
,
implementation
1700
x2018
359E
Neatness
constructive algorithms
,
dfs and similar
2400
x456
359D
Pair of Numbers
binary search
,
brute force
,
data structures
,
math
,
two pointers
2000
x4803
359C
Prime Number
math
,
number theory
1900
x2924
359B
Permutation
constructive algorithms
,
dp
,
math
1400
x7694
359A
Table
constructive algorithms
,
greedy
,
implementation
1000
x8354
358E
Dima and Kicks
brute force
,
dsu
,
graphs
,
implementation
2300
x384
358D
Dima and Hares
dp
,
greedy
1800
x3858
358C
Dima and Containers
constructive algorithms
,
greedy
,
implementation
2000
x1941
358B
Dima and Text Messages
brute force
,
strings
1500
x3674
358A
Dima and Continuous Line
brute force
,
implementation
1400
x7596
357B
Flag Day
constructive algorithms
,
implementation
1400
x8009
357A
Group of Students
brute force
,
greedy
,
implementation
1000
x6659
356E
Xenia and String Problem
dp
,
hashing
,
implementation
,
string suffix structures
,
strings
3000
x399
356D
Bags and Coins
bitmasks
,
constructive algorithms
,
dp
,
greedy
2700
x936
356C
Compartments
combinatorics
,
constructive algorithms
,
greedy
,
implementation
2100
x1226
356B
Xenia and Hamming
implementation
,
math
1900
x1883
356A
Knight Tournament
data structures
,
dsu
1500
x12695
355B
Vasya and Public Transport
greedy
,
implementation
1100
x4421
355A
Vasya and Digital Root
constructive algorithms
,
implementation
1100
x9255
354E
Lucky Number Representation
constructive algorithms
,
dfs and similar
,
dp
2200
x864
354D
Transferring Pyramid
dp
2900
x437
354C
Vasya and Beautiful Arrays
brute force
,
dp
,
number theory
2100
x2965
354B
Game with Strings
bitmasks
,
dp
,
games
2400
x447
354A
Vasya and Robot
brute force
,
greedy
,
math
1500
x5382
353E
Antichain
dp
,
graph matchings
,
greedy
2200
x564
353D
Queue
constructive algorithms
,
dp
2000
x2710
353C
Find Maximum
implementation
,
math
,
number theory
1600
x4705
353B
Two Heaps
combinatorics
,
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
1900
x2168
353A
Domino
implementation
,
math
1200
x17764
352B
Jeff and Periods
implementation
,
sortings
1300
x15739
352A
Jeff and Digits
brute force
,
implementation
,
math
1000
x24531
351E
Jeff and Permutation
greedy
2200
x1499
351D
Jeff and Removing Periods
data structures
2700
x1010
351C
Jeff and Brackets
dp
,
matrices
2500
x536
351B
Jeff and Furik
combinatorics
,
dp
,
probabilities
1900
x2268
351A
Jeff and Rounding
dp
,
greedy
,
implementation
,
math
1800
x2679
350E
Wrong Floyd
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
2200
x744
350D
Looking for Owls
binary search
,
data structures
,
geometry
,
hashing
,
sortings
2400
x252
350C
Bombs
greedy
,
implementation
,
sortings
1600
x6422
350B
Resort
graphs
1500
x3056
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