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Codeforces Round 987 (Div. 2)
18:39:52
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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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Status
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Custom test
Problems
#
Name
735A
Ostap and Grasshopper
implementation
,
strings
800
x12513
734F
Anton and School
bitmasks
,
constructive algorithms
,
implementation
,
math
2500
x1301
734E
Anton and Tree
dfs and similar
,
dp
,
trees
2100
x4231
734D
Anton and Chess
implementation
1700
x3741
734C
Anton and Making Potions
binary search
,
dp
,
greedy
,
two pointers
1600
x5344
734B
Anton and Digits
brute force
,
greedy
,
implementation
,
math
800
x29460
734A
Anton and Danik
implementation
,
strings
800
x154209
733F
Drivers Dissatisfaction
data structures
,
dsu
,
graphs
,
trees
2200
x1127
733E
Sleep in Class
constructive algorithms
,
data structures
,
math
,
two pointers
2400
x927
733D
Kostya the Sculptor
data structures
,
hashing
1600
x4180
733C
Epidemic in Monstropolis
constructive algorithms
,
dp
,
greedy
,
two pointers
1800
x3346
733B
Parade
math
1100
x10683
733A
Grasshopper And the String
implementation
1000
x16175
732F
Tourist Reform
dfs and similar
,
graphs
2300
x2607
732E
Sockets
greedy
,
sortings
2100
x1608
732D
Exams
binary search
,
greedy
,
sortings
1700
x5560
732C
Sanatorium
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
1200
x9748
732B
Cormen --- The Best Friend Of a Man
dp
,
greedy
1000
x24606
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x73152
731F
Video Cards
brute force
,
data structures
,
implementation
,
math
,
number theory
1900
x2877
731E
Funny Game
dp
,
games
2200
x1723
731D
80-th Level Archeology
brute force
,
data structures
,
greedy
,
sortings
2200
x1177
731C
Socks
dfs and similar
,
dsu
,
graphs
,
greedy
1600
x7032
731B
Coupons and Discounts
constructive algorithms
,
greedy
1100
x7989
731A
Night at the Museum
implementation
,
strings
800
x46175
730L
Expression Queries
data structures
3200
x86
730K
Roads Orientation Problem
graphs
3200
x104
730J
Bottles
dp
1900
x3448
730I
Olympiad in Programming and Sports
dp
,
flows
,
graphs
,
greedy
2000
x2097
730H
Delete Them
constructive algorithms
,
implementation
1300
x3053
730G
Car Repair Shop
implementation
1600
x2185
730F
Ber Patio
3100
x91
730E
Award Ceremony
greedy
,
implementation
2200
x723
730D
Running Over The Bridges
greedy
,
implementation
,
math
2200
x883
730C
Bulmart
binary search
,
dfs and similar
2100
x1245
730B
Minimum and Maximum
constructive algorithms
,
interactive
1800
x2488
730A
Toda 2
greedy
,
implementation
1800
x1589
729F
Financiers Game
dp
2500
x989
729E
Subordinates
constructive algorithms
,
data structures
,
graphs
,
greedy
,
sortings
1900
x2237
729D
Sea Battle
constructive algorithms
,
greedy
,
math
1700
x3771
729C
Road to Cinema
binary search
,
greedy
,
sortings
1700
x3935
729B
Spotlights
dp
,
implementation
1200
x7983
729A
Interview with Oleg
implementation
,
strings
900
x7492
727F
Polycarp's problems
binary search
,
dp
,
greedy
2300
x797
727E
Games on a CD
data structures
,
hashing
,
string suffix structures
,
strings
2300
x1239
727D
T-shirts Distribution
constructive algorithms
,
flows
,
greedy
1800
x1886
727C
Guess the Array
constructive algorithms
,
interactive
,
math
1400
x7471
727B
Bill Total Value
expression parsing
,
implementation
,
strings
1600
x1997
727A
Transformation: from A to B
brute force
,
dfs and similar
,
math
1000
x14024
725G
Messages on a Tree
3300
x164
725F
Family Photos
games
,
greedy
2900
x539
725E
Too Much Money
brute force
,
greedy
2600
x653
725D
Contest Balloons
data structures
,
greedy
1800
x2810
725C
Hidden Word
brute force
,
constructive algorithms
,
implementation
,
strings
1600
x2647
725B
Food on the Plane
implementation
,
math
1200
x5145
725A
Jumping Ball
implementation
1000
x7092
724G
Xor-matic Number of the Graph
bitmasks
,
graphs
,
math
,
number theory
,
trees
2600
x1076
724F
Uniformly Branched Trees
combinatorics
,
dp
,
trees
2700
x403
724E
Goods transportation
dp
,
flows
,
greedy
2900
x1312
724D
Dense Subsequence
data structures
,
greedy
,
strings
1900
x2343
724C
Ray Tracing
greedy
,
hashing
,
implementation
,
math
,
number theory
,
sortings
1800
x2145
724B
Batch Sort
brute force
,
greedy
,
implementation
,
math
1500
x4016
724A
Checking the Calendar
implementation
1000
x7101
723F
st-Spanning Tree
dsu
,
graphs
,
greedy
,
implementation
2300
x1477
723E
One-Way Reform
constructive algorithms
,
dfs and similar
,
flows
,
graphs
,
greedy
2200
x1997
723D
Lakes in Berland
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
1600
x6974
723C
Polycarp at the Radio
greedy
1600
x4698
723B
Text Document Analysis
expression parsing
,
implementation
,
strings
1100
x10206
723A
The New Year: Meeting Friends
implementation
,
math
,
sortings
800
x79499
722F
Cyclic Cipher
chinese remainder theorem
,
data structures
,
implementation
,
number theory
,
two pointers
2800
x522
722E
Research Rover
combinatorics
,
dp
2900
x876
722D
Generating Sets
binary search
,
data structures
,
dfs and similar
,
greedy
,
strings
,
trees
1900
x3189
722C
Destroying Array
data structures
,
dsu
1600
x9471
722B
Verse Pattern
implementation
,
strings
1200
x6504
722A
Broken Clock
brute force
,
implementation
1300
x6642
721E
Road to Home
binary search
,
dp
2700
x306
721D
Maxim and Array
constructive algorithms
,
data structures
,
greedy
,
math
2000
x2355
721C
Journey
dp
,
graphs
1800
x5907
721B
Passwords
implementation
,
math
,
sortings
,
strings
1100
x12101
721A
One-dimensional Japanese Crossword
implementation
800
x18605
720F
Array Covering
data structures
3100
x147
720E
Cipher
implementation
3100
x65
720D
Slalom
data structures
,
dp
,
sortings
3100
x245
720C
Homework
constructive algorithms
3100
x102
720B
Cactusophobia
dfs and similar
,
flows
2400
x407
720A
Closing ceremony
greedy
2000
x865
719B
Anatoly and Cockroaches
greedy
1400
x8499
719A
Vitya in the Countryside
implementation
1100
x15552
718E
Matvey's Birthday
bitmasks
,
graphs
3300
x358
718D
Andrew and Chemistry
dp
,
hashing
,
trees
2900
x395
718C
Sasha and Array
data structures
,
math
,
matrices
2300
x3905
718A
Efim and Strange Grade
dp
,
implementation
,
math
1700
x4401
717I
Cowboy Beblop at his computer
geometry
2800
x208
717H
Pokermon League challenge
math
,
probabilities
2400
x423
717G
Underfail
flows
2400
x650
717F
Heroes of Making Magic III
data structures
2600
x330
717E
Paint it really, really dark gray
dfs and similar
1900
x1451
717D
Dexterina’s Lab
games
,
matrices
,
probabilities
1900
x1421
717C
Potions Homework
implementation
,
sortings
1200
x3950
717B
R3D3’s Summer Adventure
dp
,
greedy
2700
x151
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