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Codeforces Round 974 (Div. 3)
06:38:47
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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
#
Name
1498A
GCD Sum
brute force
,
math
800
x23148
1497E2
Square-Free Division (hard version)
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
2500
x1668
1497E1
Square-Free Division (easy version)
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
1700
x8292
1497D
Genius
bitmasks
,
dp
,
graphs
,
number theory
2500
x1523
1497C2
k-LCM (hard version)
constructive algorithms
,
math
1600
x17171
1497C1
k-LCM (easy version)
constructive algorithms
,
math
1200
x25633
1497B
M-arrays
constructive algorithms
,
greedy
,
math
1200
x19801
1497A
Meximization
brute force
,
data structures
,
greedy
,
sortings
800
x24273
1496B
Max and Mex
math
1100
x17528
1496A
Split it!
brute force
,
constructive algorithms
,
greedy
,
strings
900
x20854
1495F
Squares
constructive algorithms
,
data structures
,
dp
,
graphs
,
trees
3300
x294
1495E
Qingshan and Daniel
brute force
,
data structures
,
greedy
,
implementation
3200
x414
1495D
BFS Trees
combinatorics
,
dfs and similar
,
graphs
,
math
,
shortest paths
,
trees
2600
x1315
1495C
Garden of the Sun
constructive algorithms
,
graphs
2300
x2621
1495B
Let's Go Hiking
games
,
greedy
1900
x5992
1495A
Diamond Miner
geometry
,
greedy
,
math
,
sortings
1200
x17019
1494F
Delete The Edges
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
implementation
2900
x371
1494E
A-Z Graph
constructive algorithms
,
data structures
,
graphs
,
hashing
2400
x1755
1494D
Dogeforces
constructive algorithms
,
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
greedy
,
sortings
,
trees
2300
x2562
1494C
1D Sokoban
binary search
,
dp
,
greedy
,
implementation
,
two pointers
1900
x5399
1494B
Berland Crossword
bitmasks
,
brute force
,
greedy
,
implementation
1400
x14297
1494A
ABC String
bitmasks
,
brute force
,
implementation
900
x20835
1493F
Enchanted Matrix
bitmasks
,
interactive
,
number theory
2600
x419
1493E
Enormous XOR
bitmasks
,
constructive algorithms
,
greedy
,
math
,
strings
,
two pointers
2600
x926
1493D
GCD of an Array
brute force
,
data structures
,
hashing
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2100
x4977
1493C
K-beautiful Strings
binary search
,
brute force
,
constructive algorithms
,
greedy
,
strings
2000
x4589
1493B
Planet Lapituletti
brute force
,
implementation
1300
x11830
1493A
Anti-knapsack
constructive algorithms
,
greedy
800
x19283
1492E
Almost Fault-Tolerant Database
brute force
,
constructive algorithms
,
dfs and similar
,
greedy
,
implementation
2500
x1178
1492D
Genius's Gambit
bitmasks
,
constructive algorithms
,
greedy
,
math
1900
x6085
1492C
Maximum width
binary search
,
data structures
,
dp
,
greedy
,
two pointers
1500
x16054
1492B
Card Deck
data structures
,
greedy
,
math
1100
x18357
1492A
Three swimmers
math
800
x22621
1491I
Ruler Of The Zoo
brute force
,
data structures
3500
x82
1491H
Yuezheng Ling and Dynamic Tree
data structures
,
trees
3400
x807
1491G
Switch and Flip
constructive algorithms
,
graphs
,
math
2800
x820
1491F
Magnets
binary search
,
constructive algorithms
,
interactive
2700
x994
1491E
Fib-tree
brute force
,
dfs and similar
,
divide and conquer
,
number theory
,
trees
2400
x2147
1491D
Zookeeper and The Infinite Zoo
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
math
1800
x7156
1491C
Pekora and Trampoline
brute force
,
data structures
,
dp
,
greedy
,
implementation
1700
x7892
1491B
Minimal Cost
brute force
,
math
1200
x13776
1491A
K-th Largest Value
brute force
,
greedy
,
implementation
800
x18205
1490G
Old Floppy Drive
binary search
,
data structures
,
math
1900
x5634
1490F
Equalize the Array
binary search
,
data structures
,
greedy
,
math
,
sortings
1500
x16080
1490E
Accidental Victory
binary search
,
data structures
,
greedy
1400
x19013
1490D
Permutation Transformation
dfs and similar
,
divide and conquer
,
implementation
1200
x19466
1490C
Sum of Cubes
binary search
,
brute force
,
brute force
,
math
1100
x32939
1490B
Balanced Remainders
brute force
,
constructive algorithms
,
math
1000
x26122
1490A
Dense Array
greedy
,
math
800
x31123
1488J
Flower Shop
*special problem
,
data structures
,
fft
,
math
3100
x35
1488I
Demonic Invasion
*special problem
,
flows
3100
x37
1488H
Build From Suffixes
*special problem
,
combinatorics
,
data structures
2800
x58
1488G
Painting Numbers
*special problem
,
data structures
,
greedy
,
number theory
2500
x123
1488F
Dogecoin
*special problem
,
*special problem
,
binary search
,
data structures
2300
x176
1488E
Palindromic Doubles
*special problem
,
data structures
,
dp
2200
x212
1488D
Problemsolving Marathon
*special problem
,
binary search
,
greedy
1900
x337
1488C
Two Policemen
*special problem
,
binary search
,
brute force
,
math
1900
x405
1488B
RBS Deletion
*special problem
,
greedy
1800
x558
1488A
From Zero To Y
*special problem
,
math
900
x1392
1487G
String Counting
combinatorics
,
dp
,
fft
,
math
2700
x595
1487F
Ones
dp
,
greedy
,
shortest paths
2900
x377
1487E
Cheap Dinner
brute force
,
data structures
,
graphs
,
greedy
,
implementation
,
sortings
,
two pointers
2000
x4532
1487D
Pythagorean Triples
binary search
,
brute force
,
math
,
number theory
1500
x17816
1487C
Minimum Ties
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
1500
x14110
1487B
Cat Cycle
math
,
number theory
1200
x20883
1487A
Arena
implementation
,
sortings
800
x26500
1486F
Pairs of Paths
combinatorics
,
data structures
,
dfs and similar
,
dp
,
trees
2600
x654
1486E
Paired Payment
binary search
,
brute force
,
constructive algorithms
,
dp
,
flows
,
graphs
,
shortest paths
2200
x2893
1486D
Max Median
binary search
,
data structures
,
dp
2100
x7192
1486C2
Guessing the Greatest (hard version)
binary search
,
interactive
1900
x8428
1486C1
Guessing the Greatest (easy version)
binary search
,
interactive
1600
x12122
1486B
Eastern Exhibition
binary search
,
geometry
,
shortest paths
,
sortings
1500
x15901
1486A
Shifting Stacks
greedy
,
implementation
900
x25317
1485F
Copy or Prefix Sum
combinatorics
,
data structures
,
dp
,
sortings
2400
x1937
1485E
Move and Swap
dfs and similar
,
dp
,
greedy
,
trees
2500
x1290
1485D
Multiples and Power Differences
constructive algorithms
,
graphs
,
math
,
number theory
2200
x5139
1485C
Floor and Mod
binary search
,
brute force
,
math
,
number theory
1700
x9907
1485B
Replace and Keep Sorted
dp
,
implementation
,
math
1200
x17037
1485A
Add and Divide
brute force
,
greedy
,
math
,
number theory
1000
x22307
1482H
Exam
data structures
,
string suffix structures
,
trees
3400
x476
1482G
Vabank
binary search
,
interactive
3200
x280
1482F
Useful Edges
graphs
,
shortest paths
2400
x1527
1482E
Skyline Photo
data structures
,
divide and conquer
,
dp
2100
x3162
1482D
Playlist
data structures
,
dsu
,
implementation
,
shortest paths
1900
x3840
1482C
Basic Diplomacy
brute force
,
constructive algorithms
,
greedy
,
implementation
1600
x9369
1482B
Restore Modulo
implementation
,
math
1500
x9168
1482A
Prison Break
math
800
x20405
1481F
AB Tree
dp
,
greedy
,
trees
3100
x482
1481E
Sorting Books
data structures
,
dp
,
greedy
2500
x2065
1481D
AB Graph
brute force
,
constructive algorithms
,
graphs
,
greedy
,
implementation
2000
x4526
1481C
Fence Painting
brute force
,
constructive algorithms
,
greedy
1600
x11602
1481B
New Colony
brute force
,
greedy
,
implementation
1100
x19268
1481A
Space Navigation
greedy
,
strings
800
x24905
1480B
The Great Hero
greedy
,
implementation
,
sortings
900
x17158
1480A
Yet Another String Game
games
,
greedy
,
strings
800
x25815
1479E
School Clubs
dp
,
fft
,
math
,
number theory
,
probabilities
3500
x206
1479D
Odd Mineral Resource
binary search
,
bitmasks
,
brute force
,
data structures
,
probabilities
,
trees
2900
x1013
1479C
Continuous City
bitmasks
,
constructive algorithms
2500
x1322
1479B2
Painting the Array II
constructive algorithms
,
data structures
,
dp
,
greedy
,
implementation
2100
x4036
1479B1
Painting the Array I
constructive algorithms
,
data structures
,
dp
,
greedy
,
implementation
1900
x6947
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