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Before contest
Codeforces Round 941 (Div. 1)
31:54:23
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Before contest
Codeforces Round 941 (Div. 2)
31:54:23
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greedy
combine-tags-by-or
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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
603A
Alternative Thinking
dp
,
greedy
,
math
1600
x7532
1878D
Reverse Madness
data structures
,
greedy
1600
x7526
1003D
Coins and Queries
greedy
1600
x7496
1013B
And
greedy
1200
x7460
762B
USB vs. PS/2
greedy
,
implementation
,
sortings
,
two pointers
1400
x7456
1779D
Boris and His Amazing Haircut
constructive algorithms
,
data structures
,
dp
,
dsu
,
greedy
,
sortings
1700
x7454
1850H
The Third Letter
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
1700
x7448
135A
Replacement
greedy
,
implementation
,
sortings
1300
x7422
1283D
Christmas Trees
graphs
,
greedy
,
shortest paths
1800
x7416
1082B
Vova and Trophies
greedy
1600
x7405
1774D
Same Count One
brute force
,
constructive algorithms
,
greedy
,
implementation
,
two pointers
1600
x7388
1360G
A/B Matrix
constructive algorithms
,
greedy
,
math
1900
x7371
587A
Duff and Weight Lifting
greedy
1500
x7354
960B
Minimize the error
data structures
,
greedy
,
sortings
1500
x7352
1637D
Yet Another Minimization Problem
dp
,
greedy
,
math
1800
x7347
735C
Tennis Championship
combinatorics
,
constructive algorithms
,
greedy
,
math
1600
x7333
1285D
Dr. Evil Underscores
bitmasks
,
brute force
,
dfs and similar
,
divide and conquer
,
dp
,
greedy
,
strings
,
trees
1900
x7323
424B
Megacity
binary search
,
greedy
,
implementation
,
sortings
1200
x7323
950B
Intercepted Message
greedy
,
implementation
1100
x7293
659E
New Reform
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
1600
x7292
1845D
Rating System
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
math
,
two pointers
1800
x7282
1841C
Ranom Numbers
brute force
,
dp
,
greedy
,
math
,
strings
1800
x7264
1743D
Problem with Random Tests
brute force
,
dp
,
greedy
,
probabilities
1700
x7263
1153C
Serval and Parenthesis Sequence
greedy
,
strings
1700
x7261
681C
Heap Operations
constructive algorithms
,
data structures
,
greedy
1600
x7248
1671D
Insert a Progression
brute force
,
constructive algorithms
,
greedy
1600
x7239
1619D
New Year's Problem
binary search
,
greedy
,
sortings
1800
x7225
1209C
Paint the Digits
constructive algorithms
,
greedy
,
implementation
1500
x7216
1061B
Views Matter
greedy
,
implementation
,
sortings
1400
x7213
1426E
Rock, Paper, Scissors
brute force
,
constructive algorithms
,
flows
,
greedy
,
math
1800
x7211
1257D
Yet Another Monster Killing Problem
binary search
,
data structures
,
dp
,
greedy
,
sortings
,
two pointers
1700
x7198
1797C
Li Hua and Chess
constructive algorithms
,
greedy
,
interactive
1600
x7190
1950F
0, 1, 2, Tree!
bitmasks
,
brute force
,
greedy
,
implementation
,
trees
1700
x7139
1185C2
Exam in BerSU (hard version)
brute force
,
data structures
,
greedy
,
math
1700
x7135
1178D
Prime Graph
constructive algorithms
,
greedy
,
math
,
number theory
1500
x7135
1029C
Maximal Intersection
greedy
,
math
,
sortings
1600
x7126
1238C
Standard Free2play
dp
,
greedy
,
math
1600
x7095
939D
Love Rescue
dfs and similar
,
dsu
,
graphs
,
greedy
,
strings
1600
x7093
1296E1
String Coloring (easy version)
constructive algorithms
,
dp
,
graphs
,
greedy
,
sortings
1800
x7086
605A
Sorting Railway Cars
constructive algorithms
,
greedy
1600
x7037
1692H
Gambling
data structures
,
dp
,
greedy
,
math
1700
x7022
1935C
Messenger in MAC
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1800
x7020
765B
Code obfuscation
greedy
,
implementation
,
strings
1100
x7015
1203D2
Remove the Substring (hard version)
binary search
,
greedy
,
implementation
,
two pointers
1700
x7013
1040B
Shashlik Cooking
dp
,
greedy
,
math
1300
x7009
995B
Suit and Tie
greedy
,
implementation
,
math
1400
x7008
1781C
Equal Frequencies
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
,
strings
1600
x7007
991D
Bishwock
dp
,
greedy
1500
x6997
1334D
Minimum Euler Cycle
constructive algorithms
,
graphs
,
greedy
,
implementation
1800
x6974
1883E
Look Back
bitmasks
,
greedy
1700
x6964
1922E
Increasing Subsequences
bitmasks
,
constructive algorithms
,
divide and conquer
,
greedy
,
math
1800
x6963
840A
Leha and Function
combinatorics
,
greedy
,
math
,
number theory
,
sortings
1300
x6953
145A
Lucky Conversion
greedy
,
implementation
1200
x6953
1660E
Matrix and Shifts
brute force
,
constructive algorithms
,
greedy
,
implementation
1600
x6945
569B
Inventory
greedy
,
math
1200
x6945
441B
Valera and Fruits
greedy
,
implementation
1400
x6924
1611E1
Escape The Maze (easy version)
dfs and similar
,
greedy
,
shortest paths
,
trees
,
two pointers
1700
x6914
1609D
Social Network
dsu
,
graphs
,
greedy
,
implementation
,
trees
1600
x6898
915C
Permute Digits
dp
,
greedy
1700
x6874
1491D
Zookeeper and The Infinite Zoo
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
math
1800
x6869
1245D
Shichikuji and Power Grid
dsu
,
graphs
,
greedy
,
shortest paths
,
trees
1900
x6865
257B
Playing Cubes
games
,
greedy
,
implementation
1300
x6851
389B
Fox and Cross
greedy
,
implementation
1100
x6809
723D
Lakes in Berland
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
1600
x6802
1303D
Fill The Bag
bitmasks
,
greedy
1900
x6797
1167D
Bicolored RBS
constructive algorithms
,
greedy
1500
x6778
1043C
Smallest Word
constructive algorithms
,
greedy
,
implementation
1500
x6775
731C
Socks
dfs and similar
,
dsu
,
graphs
,
greedy
1600
x6766
1666D
Deletive Editing
greedy
900
x6765
1353E
K-periodic Garland
brute force
,
dp
,
greedy
1900
x6761
321C
Ciel the Commander
constructive algorithms
,
dfs and similar
,
divide and conquer
,
greedy
,
trees
2100
x6760
1776A
Walking Boy
greedy
800
x6750
435B
Pasha Maximizes
greedy
1400
x6739
572B
Order Book
data structures
,
greedy
,
implementation
,
sortings
1300
x6733
1479B1
Painting the Array I
constructive algorithms
,
data structures
,
dp
,
greedy
,
implementation
1900
x6727
1158A
The Party and Sweets
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
,
two pointers
1500
x6725
1945E
Binary Search
binary search
,
constructive algorithms
,
greedy
1700
x6722
1889B
Doremy's Connecting Plan
constructive algorithms
,
greedy
,
math
,
sortings
1700
x6689
1787C
Remove the Bracket
dp
,
greedy
,
math
1600
x6675
1155D
Beautiful Array
brute force
,
data structures
,
divide and conquer
,
dp
,
greedy
1900
x6671
1768D
Lucky Permutation
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
1800
x6667
357A
Group of Students
brute force
,
greedy
,
implementation
1000
x6666
1462F
The Treasure of The Segments
binary search
,
data structures
,
greedy
1800
x6657
1706D1
Chopping Carrots (Easy Version)
binary search
,
brute force
,
constructive algorithms
,
greedy
,
number theory
1700
x6648
1256C
Platforms Jumping
greedy
1700
x6637
771B
Bear and Different Names
constructive algorithms
,
greedy
1500
x6626
1175C
Electrification
binary search
,
brute force
,
greedy
1600
x6595
1027C
Minimum Value Rectangle
greedy
1600
x6594
1899F
Alex's whims
constructive algorithms
,
graphs
,
greedy
,
shortest paths
,
trees
1600
x6583
381B
Sereja and Stairs
greedy
,
implementation
,
sortings
1100
x6573
821C
Okabe and Boxes
data structures
,
greedy
,
trees
1500
x6570
1119C
Ramesses and Corner Inversion
constructive algorithms
,
greedy
,
implementation
,
math
1500
x6556
1955E
Long Inversions
brute force
,
greedy
,
implementation
,
sortings
1700
x6548
955A
Feed the cat
greedy
,
math
1100
x6545
830A
Office Keys
binary search
,
brute force
,
dp
,
greedy
,
sortings
1800
x6541
219C
Color Stripe
brute force
,
dp
,
greedy
1600
x6533
986A
Fair
graphs
,
greedy
,
number theory
,
shortest paths
1600
x6511
1859D
Andrey and Escape from Capygrad
binary search
,
data structures
,
dp
,
dsu
,
greedy
,
sortings
1800
x6505
379C
New Year Ratings Change
greedy
,
sortings
1400
x6492
750C
New Year and Rating
binary search
,
greedy
,
math
1600
x6484
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