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Codeforces Round 974 (Div. 3)
02:38:23
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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
730H
Delete Them
constructive algorithms
,
implementation
1300
x2982
730G
Car Repair Shop
implementation
1600
x2143
730F
Ber Patio
3100
x91
730E
Award Ceremony
greedy
,
implementation
2200
x720
730D
Running Over The Bridges
greedy
,
implementation
,
math
2200
x879
730C
Bulmart
binary search
,
dfs and similar
2100
x1228
730B
Minimum and Maximum
constructive algorithms
,
interactive
1800
x2440
730A
Toda 2
greedy
,
implementation
1800
x1568
729F
Financiers Game
dp
2500
x946
729E
Subordinates
constructive algorithms
,
data structures
,
graphs
,
greedy
,
sortings
1900
x2227
729D
Sea Battle
constructive algorithms
,
greedy
,
math
1700
x3720
729C
Road to Cinema
binary search
,
greedy
,
sortings
1700
x3909
729B
Spotlights
dp
,
implementation
1200
x7897
729A
Interview with Oleg
implementation
,
strings
900
x7409
727F
Polycarp's problems
binary search
,
dp
,
greedy
2300
x790
727E
Games on a CD
data structures
,
hashing
,
string suffix structures
,
strings
2300
x1200
727D
T-shirts Distribution
constructive algorithms
,
flows
,
greedy
1800
x1830
727C
Guess the Array
constructive algorithms
,
interactive
,
math
1400
x7326
727B
Bill Total Value
expression parsing
,
implementation
,
strings
1600
x1989
727A
Transformation: from A to B
brute force
,
dfs and similar
,
math
1000
x13735
725G
Messages on a Tree
3300
x163
725F
Family Photos
games
,
greedy
2900
x528
725E
Too Much Money
brute force
,
greedy
2600
x651
725D
Contest Balloons
data structures
,
greedy
1800
x2798
725C
Hidden Word
brute force
,
constructive algorithms
,
implementation
,
strings
1600
x2638
725B
Food on the Plane
implementation
,
math
1200
x5128
725A
Jumping Ball
implementation
1000
x7066
724G
Xor-matic Number of the Graph
bitmasks
,
graphs
,
math
,
number theory
,
trees
2600
x1051
724F
Uniformly Branched Trees
combinatorics
,
dp
,
trees
2700
x401
724E
Goods transportation
dp
,
flows
,
greedy
2900
x1298
724D
Dense Subsequence
data structures
,
greedy
,
strings
1900
x2327
724C
Ray Tracing
greedy
,
hashing
,
implementation
,
math
,
number theory
,
sortings
1800
x2135
724B
Batch Sort
brute force
,
greedy
,
implementation
,
math
1500
x4009
724A
Checking the Calendar
implementation
1000
x7074
723F
st-Spanning Tree
dsu
,
graphs
,
greedy
,
implementation
2300
x1472
723E
One-Way Reform
constructive algorithms
,
dfs and similar
,
flows
,
graphs
,
greedy
2200
x1950
723D
Lakes in Berland
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
1600
x6941
723C
Polycarp at the Radio
greedy
1600
x4617
723B
Text Document Analysis
expression parsing
,
implementation
,
strings
1100
x10170
723A
The New Year: Meeting Friends
implementation
,
math
,
sortings
800
x77165
722F
Cyclic Cipher
chinese remainder theorem
,
data structures
,
implementation
,
number theory
,
two pointers
2800
x492
722E
Research Rover
combinatorics
,
dp
2900
x866
722D
Generating Sets
binary search
,
data structures
,
dfs and similar
,
greedy
,
strings
,
trees
1900
x3157
722C
Destroying Array
data structures
,
dsu
1600
x9290
722B
Verse Pattern
implementation
,
strings
1200
x6392
722A
Broken Clock
brute force
,
implementation
1300
x6630
721E
Road to Home
binary search
,
dp
2700
x305
721D
Maxim and Array
constructive algorithms
,
data structures
,
greedy
,
math
2000
x2344
721C
Journey
dp
,
graphs
1800
x5853
721B
Passwords
implementation
,
math
,
sortings
,
strings
1100
x12071
721A
One-dimensional Japanese Crossword
implementation
800
x18378
720F
Array Covering
data structures
3100
x146
720E
Cipher
implementation
3100
x65
720D
Slalom
data structures
,
dp
,
sortings
3100
x236
720C
Homework
constructive algorithms
3100
x102
720B
Cactusophobia
dfs and similar
,
flows
2400
x401
720A
Closing ceremony
greedy
2000
x858
719B
Anatoly and Cockroaches
greedy
1400
x8473
719A
Vitya in the Countryside
implementation
1100
x15529
718E
Matvey's Birthday
bitmasks
,
graphs
3300
x352
718D
Andrew and Chemistry
dp
,
hashing
,
trees
2900
x394
718C
Sasha and Array
data structures
,
math
,
matrices
2300
x3829
718A
Efim and Strange Grade
dp
,
implementation
,
math
1700
x4395
717I
Cowboy Beblop at his computer
geometry
2800
x204
717H
Pokermon League challenge
math
,
probabilities
2400
x422
717G
Underfail
flows
2400
x639
717F
Heroes of Making Magic III
data structures
2600
x325
717E
Paint it really, really dark gray
dfs and similar
1900
x1445
717D
Dexterina’s Lab
games
,
matrices
,
probabilities
1900
x1407
717C
Potions Homework
implementation
,
sortings
1200
x3932
717B
R3D3’s Summer Adventure
dp
,
greedy
2700
x146
717A
Festival Organization
combinatorics
,
math
,
number theory
2900
x349
716B
Complete the Word
greedy
,
two pointers
1300
x12118
716A
Crazy Computer
implementation
800
x22135
715E
Complete the Permutations
combinatorics
,
fft
,
graphs
,
math
3400
x356
715D
Create a Maze
constructive algorithms
3100
x252
715C
Digit Tree
dfs and similar
,
divide and conquer
,
dsu
,
trees
2700
x2095
715B
Complete The Graph
binary search
,
constructive algorithms
,
graphs
,
shortest paths
2300
x2771
715A
Plus and Square Root
constructive algorithms
,
math
1600
x5603
714B
Filya and Homework
implementation
,
sortings
1200
x14437
714A
Meeting of Old Friends
implementation
,
math
1100
x10765
713E
Sonya Partymaker
binary search
,
dp
3300
x350
713D
Animals and Puzzle
binary search
,
data structures
2700
x1138
713C
Sonya and Problem Wihtout a Legend
dp
,
sortings
2300
x5276
713B
Searching Rectangles
binary search
,
constructive algorithms
,
interactive
2200
x1447
713A
Sonya and Queries
data structures
,
implementation
1400
x8453
712E
Memory and Casinos
data structures
,
math
,
probabilities
2500
x613
712D
Memory and Scores
combinatorics
,
dp
,
math
2200
x1830
712C
Memory and De-Evolution
greedy
,
math
1600
x5768
712B
Memory and Trident
implementation
,
strings
1100
x9737
712A
Memory and Crow
implementation
,
math
800
x11876
711E
ZS and The Birthday Paradox
math
,
number theory
,
probabilities
2300
x1265
711D
Directed Roads
combinatorics
,
dfs and similar
,
graphs
,
math
1900
x4444
711C
Coloring Trees
dp
1700
x8087
711B
Chris and Magic Square
constructive algorithms
,
implementation
1400
x8410
711A
Bus to Udayland
brute force
,
implementation
800
x29225
710F
String Set Queries
brute force
,
data structures
,
hashing
,
interactive
,
string suffix structures
,
strings
2400
x1858
710E
Generate a String
dfs and similar
,
dp
2000
x5175
710D
Two Arithmetic Progressions
math
,
number theory
2500
x1291
710C
Magic Odd Square
constructive algorithms
,
math
1500
x5088
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