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Rayan
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Before contest
Codeforces Round 997 (Div. 2)
41:42:17
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Difficulty:
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combine-tags-by-or
*combine tags by OR
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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Custom test
Problems
#
Name
1209D
Cow and Snacks
dfs and similar
,
dsu
,
graphs
1700
x9565
1209C
Paint the Digits
constructive algorithms
,
greedy
,
implementation
1500
x7579
1209B
Koala and Lights
implementation
,
math
,
number theory
1300
x8231
1208B
Uniqueness
binary search
,
brute force
,
implementation
,
two pointers
1500
x10661
1207C
Gas Pipeline
dp
,
greedy
1500
x9935
1204C
Anna, Svyatoslav and Maps
dp
,
graphs
,
greedy
,
shortest paths
1700
x6782
1203E
Boxers
greedy
,
sortings
1500
x14031
1203D2
Remove the Substring (hard version)
binary search
,
greedy
,
implementation
,
two pointers
1700
x7542
1203D1
Remove the Substring (easy version)
greedy
,
implementation
1600
x8933
1203C
Common Divisors
implementation
,
math
1300
x21157
1202B
You Are Given a Decimal String...
brute force
,
dp
,
shortest paths
1700
x4611
1201C
Maximum Median
binary search
,
greedy
,
math
,
sortings
1400
x25012
1201B
Zero Array
greedy
,
math
1500
x19608
1200C
Round Corridor
math
,
number theory
1400
x9946
1198B
Welfare State
binary search
,
brute force
,
data structures
,
sortings
1600
x9563
1198A
MP3
sortings
,
two pointers
1600
x9103
1197C
Array Splitting
greedy
,
sortings
1400
x14032
1196D2
RGB Substring (hard version)
data structures
,
dp
,
implementation
,
two pointers
1600
x9863
1196D1
RGB Substring (easy version)
implementation
1500
x10664
1196C
Robot Breakout
implementation
1500
x9430
1195D1
Submarine in the Rybinsk Sea (easy edition)
combinatorics
,
math
,
number theory
1500
x7941
1195C
Basketball Exercise
dp
1400
x27196
1194D
1-2-K Game
games
,
math
1700
x6647
1194C
From S To T
implementation
,
strings
1300
x13343
1194B
Yet Another Crosses Problem
implementation
1300
x10368
1190A
Tokitsukaze and Discard Items
implementation
,
two pointers
1400
x9418
1189C
Candies!
data structures
,
dp
,
implementation
,
math
1400
x10669
1188A1
Add on a Tree
trees
1600
x8517
1187B
Letters Shop
binary search
,
implementation
,
strings
1300
x12339
1186D
Vus the Cossack and Numbers
constructive algorithms
,
greedy
,
math
1500
x9020
1185D
Extra Element
implementation
,
math
1700
x6778
1185C2
Exam in BerSU (hard version)
brute force
,
data structures
,
greedy
,
math
1700
x7517
1184D1
Parallel Universes (Easy)
implementation
1600
x2584
1184C1
Heidi and the Turing Test (Easy)
implementation
1600
x2375
1184B1
The Doctor Meets Vader (Easy)
binary search
,
sortings
1400
x5475
1183D
Candy Box (easy version)
greedy
,
sortings
1400
x15034
1183C
Computer Game
binary search
,
math
1400
x14177
1182C
Beautiful Lyrics
data structures
,
greedy
,
strings
1700
x4445
1182B
Plus from Picture
dfs and similar
,
implementation
,
strings
1300
x11232
1181B
Split a Number
greedy
,
implementation
,
strings
1500
x6358
1180B
Nick and Array
greedy
,
implementation
1500
x9678
1179A
Valeriy and Deque
data structures
,
implementation
1500
x10773
1178D
Prime Graph
constructive algorithms
,
greedy
,
math
,
number theory
1500
x7498
1178C
Tiles
combinatorics
,
greedy
,
math
1300
x12152
1178B
WOW Factor
dp
,
strings
1300
x15985
1176E
Cover it!
dfs and similar
,
dsu
,
graphs
,
shortest paths
,
trees
1700
x11489
1176C
Lose it!
dp
,
greedy
,
implementation
1300
x14384
1175C
Electrification
binary search
,
brute force
,
greedy
1600
x6902
1175B
Catch Overflow!
data structures
,
expression parsing
,
implementation
1600
x10894
1174C
Ehab and a Special Coloring Problem
constructive algorithms
,
number theory
1300
x12163
1169B
Pairs
graphs
,
implementation
1500
x9925
1168A
Increasing by Modulo
binary search
,
greedy
1700
x6978
1167D
Bicolored RBS
constructive algorithms
,
greedy
1500
x7051
1167C
News Distribution
dfs and similar
,
dsu
,
graphs
1400
x19304
1167B
Lost Numbers
brute force
,
divide and conquer
,
interactive
,
math
1400
x12383
1166C
A Tale of Two Lands
binary search
,
sortings
,
two pointers
1500
x10051
1165E
Two Arrays and Sum of Functions
greedy
,
math
,
sortings
1600
x8566
1165D
Almost All Divisors
math
,
number theory
1600
x16637
1165C
Good String
greedy
1300
x13160
1163B2
Cat Party (Hard Edition)
data structures
,
implementation
1600
x7333
1163B1
Cat Party (Easy Edition)
data structures
,
implementation
1500
x7043
1162B
Double Matrix
brute force
,
greedy
1400
x5842
1159B
Expansion coefficient of the array
implementation
,
math
1300
x7160
1158A
The Party and Sweets
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
,
two pointers
1500
x7317
1157E
Minimum Array
binary search
,
data structures
,
greedy
1700
x8521
1157C2
Increasing Subsequence (hard version)
greedy
1700
x8178
1157C1
Increasing Subsequence (easy version)
greedy
1300
x12777
1157B
Long Number
greedy
1300
x14872
1156A
Inscribed Figures
geometry
1400
x8294
1155C
Alarm Clocks Everywhere
math
,
number theory
1300
x9283
1154D
Walking Robot
greedy
1500
x10081
1154C
Gourmet Cat
implementation
,
math
1400
x10539
1153C
Serval and Parenthesis Sequence
greedy
,
strings
1700
x7455
1152B
Neko Performs Cat Furrier Transform
bitmasks
,
constructive algorithms
,
dfs and similar
,
math
1300
x8991
1151D
Stas and the Queue at the Buffet
greedy
,
math
,
sortings
1600
x8543
1151B
Dima and a Bad XOR
bitmasks
,
brute force
,
constructive algorithms
,
dp
1600
x11534
1148C
Crazy Diamond
constructive algorithms
,
sortings
1700
x5338
1148B
Born This Way
binary search
,
brute force
,
two pointers
1600
x7580
1147A
Hide and Seek
graphs
1500
x5297
1146C
Tree Diameter
bitmasks
,
graphs
,
interactive
1700
x3758
1144F
Graph Without Long Directed Paths
dfs and similar
,
graphs
1700
x11956
1144D
Equalize Them All
constructive algorithms
,
greedy
1400
x10428
1143C
Queen
dfs and similar
,
trees
1400
x13099
1142A
The Beatles
brute force
,
math
1700
x3474
1141E
Superhero Battle
math
1700
x6824
1141D
Colored Boots
greedy
,
implementation
1500
x8622
1141C
Polycarp Restores Permutation
math
1500
x11599
1140C
Playlist
brute force
,
data structures
,
sortings
1600
x9695
1139C
Edgy Trees
dfs and similar
,
dsu
,
graphs
,
math
,
trees
1500
x13020
1137B
Camp Schedule
greedy
,
hashing
,
strings
1600
x6239
1137A
Skyscrapers
implementation
,
sortings
1600
x4507
1136C
Nastya Is Transposing Matrices
constructive algorithms
,
sortings
1500
x7751
1133F1
Spanning Tree with Maximum Degree
graphs
1600
x7997
1133D
Zero Quantity Maximization
hashing
,
math
,
number theory
1500
x12455
1132C
Painting the Fence
brute force
1700
x5465
1131F
Asya And Kittens
constructive algorithms
,
dsu
1700
x6841
1131B
Draw!
greedy
,
implementation
1400
x9798
1130C
Connect
brute force
,
dfs and similar
,
dsu
1400
x8734
1129A1
Toy Train (Simplified)
brute force
,
greedy
1700
x3836
1121C
System Testing
implementation
1600
x2024
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