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Codeforces Round 937 (Div. 4)
00:51:28
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brute force
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
1365E
Maximum Subsequence Value
brute force
,
constructive algorithms
1900
x7454
863B
Kayaking
brute force
,
greedy
,
sortings
1500
x7452
614A
Link/Cut Tree
brute force
,
implementation
1500
x7386
157A
Game Outcome
brute force
800
x7377
1244C
The Football Season
brute force
,
math
,
number theory
2000
x7356
515B
Drazil and His Happy Friends
brute force
,
dsu
,
meet-in-the-middle
,
number theory
1300
x7344
1774D
Same Count One
brute force
,
constructive algorithms
,
greedy
,
implementation
,
two pointers
1600
x7304
1835A
k-th equality
brute force
,
implementation
,
math
1700
x7296
233B
Non-square Equation
binary search
,
brute force
,
math
1400
x7264
675B
Restoring Painting
brute force
,
constructive algorithms
,
math
1400
x7259
400B
Inna and New Matrix of Candies
brute force
,
implementation
,
schedules
1200
x7257
1285D
Dr. Evil Underscores
bitmasks
,
brute force
,
dfs and similar
,
divide and conquer
,
dp
,
greedy
,
strings
,
trees
1900
x7225
1743D
Problem with Random Tests
brute force
,
dp
,
greedy
,
probabilities
1700
x7184
1671D
Insert a Progression
brute force
,
constructive algorithms
,
greedy
1600
x7180
1426E
Rock, Paper, Scissors
brute force
,
constructive algorithms
,
flows
,
greedy
,
math
1800
x7177
1244D
Paint the Tree
brute force
,
constructive algorithms
,
dp
,
graphs
,
implementation
,
trees
1800
x7168
801A
Vicious Keyboard
brute force
1100
x7168
1114C
Trailing Loves (or L'oeufs?)
brute force
,
implementation
,
math
,
number theory
1700
x7153
1841C
Ranom Numbers
brute force
,
dp
,
greedy
,
math
,
strings
1800
x7140
1845D
Rating System
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
math
,
two pointers
1800
x7138
1148B
Born This Way
binary search
,
brute force
,
two pointers
1600
x7119
1185C2
Exam in BerSU (hard version)
brute force
,
data structures
,
greedy
,
math
1700
x7117
1250F
Data Center
brute force
,
implementation
800
x7109
1806C
Sequence Master
brute force
,
constructive algorithms
,
math
1600
x7078
897B
Chtholly's request
brute force
1300
x7061
1217C
The Number Of Good Substrings
binary search
,
bitmasks
,
brute force
1700
x7045
1928C
Physical Education Lesson
brute force
,
math
,
number theory
1600
x7038
754B
Ilya and tic-tac-toe game
brute force
,
implementation
1100
x6996
612A
The Text Splitting
brute force
,
implementation
,
strings
1300
x6978
817C
Really Big Numbers
binary search
,
brute force
,
dp
,
math
1600
x6936
911C
Three Garlands
brute force
,
constructive algorithms
1400
x6935
1948D
Tandem Repeats?
brute force
,
strings
,
two pointers
1700
x6911
1781C
Equal Frequencies
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
,
strings
1600
x6902
1660E
Matrix and Shifts
brute force
,
constructive algorithms
,
greedy
,
implementation
1600
x6899
1660F1
Promising String (easy version)
brute force
,
implementation
,
math
,
strings
1700
x6887
1466E
Apollo versus Pan
bitmasks
,
brute force
,
math
1800
x6885
794A
Bank Robbery
brute force
,
implementation
800
x6885
538A
Cutting Banner
brute force
,
implementation
1400
x6885
922C
Cave Painting
brute force
,
number theory
1600
x6811
761B
Dasha and friends
brute force
,
implementation
,
math
1300
x6784
937B
Vile Grasshoppers
brute force
,
math
,
number theory
1400
x6773
29A
Spit Problem
brute force
1000
x6770
3C
Tic-tac-toe
brute force
,
games
,
implementation
1800
x6763
1200E
Compress Words
brute force
,
hashing
,
implementation
,
string suffix structures
,
strings
2000
x6762
1758D
Range = √Sum
binary search
,
brute force
,
constructive algorithms
,
math
,
two pointers
1800
x6752
7A
Kalevitch and Chess
brute force
,
constructive algorithms
1100
x6747
988D
Points and Powers of Two
brute force
,
math
1800
x6737
1353E
K-periodic Garland
brute force
,
dp
,
greedy
1900
x6731
859B
Lazy Security Guard
brute force
,
geometry
,
math
1000
x6714
975B
Mancala
brute force
,
implementation
1100
x6713
366B
Dima and To-do List
brute force
,
implementation
1200
x6703
934A
A Compatible Pair
brute force
,
games
1400
x6675
908C
New Year and Curling
brute force
,
geometry
,
implementation
,
math
1500
x6644
1552D
Array Differentiation
bitmasks
,
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
math
1800
x6635
493C
Vasya and Basketball
binary search
,
brute force
,
data structures
,
implementation
,
sortings
,
two pointers
1600
x6635
357A
Group of Students
brute force
,
greedy
,
implementation
1000
x6634
284B
Cows and Poker Game
brute force
,
implementation
1000
x6628
1155D
Beautiful Array
brute force
,
data structures
,
divide and conquer
,
dp
,
greedy
1900
x6615
1706D1
Chopping Carrots (Easy Version)
binary search
,
brute force
,
constructive algorithms
,
greedy
,
number theory
1700
x6600
181A
Series of Crimes
brute force
,
geometry
,
implementation
800
x6598
1731D
Valiant's New Map
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x6589
505A
Mr. Kitayuta's Gift
brute force
,
implementation
,
strings
1100
x6578
1175C
Electrification
binary search
,
brute force
,
greedy
1600
x6570
1096C
Polygon for the Angle
brute force
,
geometry
1600
x6510
489D
Unbearable Controversy of Being
brute force
,
combinatorics
,
dfs and similar
,
graphs
1700
x6510
1935C
Messenger in MAC
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1800
x6509
219C
Color Stripe
brute force
,
dp
,
greedy
1600
x6505
633B
A Trivial Problem
brute force
,
constructive algorithms
,
math
,
number theory
1300
x6496
830A
Office Keys
binary search
,
brute force
,
dp
,
greedy
,
sortings
1800
x6469
1846E2
Rudolf and Snowflakes (hard version)
binary search
,
brute force
,
implementation
,
math
1800
x6441
485B
Valuable Resources
brute force
,
greedy
1300
x6437
895A
Pizza Separation
brute force
,
implementation
1200
x6415
722A
Broken Clock
brute force
,
implementation
1300
x6406
1152C
Neko does Maths
brute force
,
math
,
number theory
1800
x6350
1620C
BA-String
brute force
,
dp
,
greedy
,
implementation
,
math
1800
x6307
1073D
Berland Fair
binary search
,
brute force
,
data structures
,
greedy
1700
x6283
1822G1
Magic Triples (Easy Version)
brute force
,
data structures
,
math
,
number theory
1700
x6280
1205B
Shortest Cycle
bitmasks
,
brute force
,
graphs
,
shortest paths
1900
x6258
814C
An impassioned circulation of affection
brute force
,
dp
,
strings
,
two pointers
1600
x6245
1864D
Matrix Cascade
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
math
1700
x6217
242A
Heads or Tails
brute force
,
implementation
1100
x6214
1763C
Another Array Problem
brute force
,
constructive algorithms
,
greedy
2000
x6189
158D
Ice Sculptures
*special problem
,
brute force
,
number theory
1300
x6162
35C
Fire Again
brute force
,
dfs and similar
,
shortest paths
1500
x6149
1012A
Photo of The Sky
brute force
,
implementation
,
math
,
sortings
1500
x6139
192B
Walking in the Rain
brute force
,
implementation
1100
x6122
1009D
Relatively Prime Graph
brute force
,
constructive algorithms
,
graphs
,
greedy
,
math
1700
x6118
626A
Robot Sequence
brute force
,
implementation
1000
x6115
920F
SUM and REPLACE
brute force
,
data structures
,
dsu
,
number theory
2000
x6106
1648B
Integral Array
brute force
,
constructive algorithms
,
data structures
,
math
1800
x6097
165E
Compatible Numbers
bitmasks
,
brute force
,
dfs and similar
,
dp
2200
x6083
1674E
Breaking the Wall
binary search
,
brute force
,
constructive algorithms
,
greedy
,
math
2000
x6062
1111C
Creative Snap
binary search
,
brute force
,
divide and conquer
,
math
1700
x6054
300B
Coach
brute force
,
dfs and similar
,
graphs
1500
x6033
1111B
Average Superhero Gang Power
brute force
,
implementation
,
math
1700
x6019
696A
Lorenzo Von Matterhorn
brute force
,
data structures
,
implementation
,
trees
1500
x5961
1292B
Aroma's Search
brute force
,
constructive algorithms
,
geometry
,
greedy
,
implementation
1700
x5936
205B
Little Elephant and Sorting
brute force
,
greedy
1400
x5913
106B
Choosing Laptop
brute force
,
implementation
1000
x5892
1560F1
Nearest Beautiful Number (easy version)
binary search
,
bitmasks
,
brute force
,
constructive algorithms
,
dfs and similar
,
greedy
1900
x5857
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