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Codeforces Round 1134 (Div. 4)
2 days
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2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
communication
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
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matrices
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number theory
probabilities
schedules
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sortings
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strings
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trees
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Status
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Custom test
Problems
#
Name
1405B
Array Cancellation
constructive algorithms
,
implementation
1000
x23563
1405A
Permutation Forgery
constructive algorithms
800
x22025
1401A
Distance and Axis
constructive algorithms
,
math
900
x28993
1400A
String Similarity
constructive algorithms
,
strings
800
x28175
1399B
Gifts Fixing
greedy
800
x47983
1399A
Remove Smallest
greedy
,
sortings
800
x85693
1398B
Substring Removal Game
games
,
greedy
,
sortings
800
x26328
1398A
Bad Triangle
geometry
,
math
800
x29171
1397A
Juggling Letters
greedy
,
strings
800
x30222
1395A
Boboniu Likes to Color Balls
brute force
,
math
1000
x25788
1393A
Rainbow Dash, Fluttershy and Chess Coloring
greedy
,
math
800
x20885
1392B
Omkar and Infinity Clock
implementation
,
math
800
x18998
1392A
Omkar and Password
greedy
,
math
800
x21879
1391B
Fix You
brute force
,
greedy
,
implementation
800
x30419
1391A
Suborrays
constructive algorithms
,
math
800
x25233
1389A
LCM Problem
constructive algorithms
,
greedy
,
math
,
number theory
800
x52574
1388B
Captain Flint and a Long Voyage
greedy
,
math
1000
x22944
1388A
Captain Flint and Crew Recruitment
brute force
,
greedy
,
math
,
number theory
800
x26138
1385B
Restore the Permutation by Merger
greedy
800
x40149
1385A
Three Pairwise Maximums
math
800
x44661
1382A
Common Subsequence
brute force
800
x27613
1380A
Three Indices
brute force
,
data structures
900
x45122
1374C
Move Brackets
greedy
,
strings
1000
x69898
1374B
Multiply by 2, divide by 6
math
900
x79379
1374A
Required Remainder
math
800
x66969
1373B
01 Game
games
900
x58525
1373A
Donut Shops
greedy
,
implementation
,
math
1000
x30184
1372A
Omkar and Completion
constructive algorithms
,
implementation
800
x33727
1371A
Magical Sticks
math
800
x52399
1370A
Maximum GCD
greedy
,
implementation
,
math
,
number theory
800
x69289
1369A
FashionabLee
geometry
,
math
800
x39625
1368A
C+=
brute force
,
greedy
,
implementation
,
math
800
x47808
1367B
Even Array
greedy
,
math
800
x67102
1367A
Short Substrings
implementation
,
strings
800
x70368
1362A
Johnny and Ancient Computer
implementation
1000
x37932
1360B
Honest Coach
greedy
,
sortings
800
x55568
1360A
Minimal Square
greedy
,
math
800
x58734
1359B
New Theatre Square
brute force
,
dp
,
greedy
,
implementation
,
two pointers
1000
x29742
1359A
Berland Poker
brute force
,
greedy
,
math
1000
x32180
1358B
Maria Breaks the Self-isolation
greedy
,
sortings
1000
x26150
1358A
Park Lighting
greedy
,
math
800
x44208
1354A
Alarm Clock
math
900
x25126
1353C
Board Moves
math
1000
x39614
1353B
Two Arrays And Swaps
greedy
,
sortings
800
x60486
1353A
Most Unstable Array
constructive algorithms
,
greedy
,
math
800
x45420
1352A
Sum of Round Numbers
implementation
,
math
800
x111840
1351B
Square?
brute force
,
implementation
,
math
900
x18862
1351A
A+B (Trial Problem)
implementation
800
x27784
1350A
Orac and Factors
math
900
x27808
1348A
Phoenix and Balance
greedy
,
math
800
x43687
1346A
Color Revolution
*special problem
,
math
1000
x2234
1345A
Puzzle Pieces
math
800
x24963
1343B
Balanced Array
constructive algorithms
,
math
800
x67697
1343A
Candies
brute force
,
math
900
x54950
1342A
Road To Zero
greedy
,
math
1000
x47756
1341A
Nastya and Rice
math
900
x30749
1339A
Filling Diamonds
brute force
,
dp
,
implementation
,
math
900
x34754
1337B
Kana and Dragon Quest game
greedy
,
implementation
,
math
900
x37445
1337A
Ichihime and Triangle
constructive algorithms
,
math
800
x43925
1335B
Construct the String
constructive algorithms
900
x43523
1335A
Candies and Two Sisters
math
800
x110920
1333A
Little Artem
constructive algorithms
1000
x26160
1330A
Dreamoon and Ranking Collection
implementation
900
x19586
1328A
Divisibility Problem
math
800
x141593
1326B
Maximums
implementation
,
math
900
x25560
1326A
Bad Ugly Numbers
constructive algorithms
,
number theory
1000
x33231
1325B
CopyCopyCopyCopyCopy
greedy
,
implementation
800
x39481
1325A
EhAb AnD gCd
constructive algorithms
,
greedy
,
number theory
800
x48006
1324A
Yet Another Tetris Problem
implementation
,
number theory
900
x27659
1323A
Even Subset Sum Problem
brute force
,
dp
,
greedy
,
implementation
800
x21150
1321A
Contest for Robots
greedy
900
x15113
1316A
Grade Allocation
implementation
800
x19941
1315A
Dead Pixel
implementation
800
x13068
1313A
Fast Food Restaurant
brute force
,
greedy
,
implementation
900
x16443
1312B
Bogosort
constructive algorithms
,
sortings
1000
x43105
1312A
Two Regular Polygons
geometry
,
greedy
,
math
,
number theory
800
x27935
1311A
Add Odd or Subtract Even
greedy
,
implementation
,
math
800
x47253
1307A
Cow and Haybales
greedy
,
implementation
800
x15753
1305A
Kuroni and the Gifts
brute force
,
constructive algorithms
,
greedy
,
sortings
800
x14810
1304A
Two Rabbits
math
800
x27106
1303A
Erasing Zeroes
implementation
,
strings
800
x37741
1301A
Three Strings
implementation
,
strings
800
x20314
1300B
Assigning to Classes
greedy
,
implementation
,
sortings
1000
x26542
1300A
Non-zero
implementation
,
math
800
x21868
1296B
Food Buying
math
900
x33264
1296A
Array with Odd Sum
math
800
x50107
1295A
Display The Number
greedy
900
x24600
1294A
Collecting Coins
math
800
x55412
1293B
JOE is on TV!
combinatorics
,
greedy
,
math
1000
x22572
1291A
Even But Not Even
greedy
,
math
,
strings
900
x21061
1287A
Angry Students
greedy
,
implementation
800
x23329
1285A
Mezo Playing Zoma
math
800
x30348
1284A
New Year and Naming
implementation
,
strings
800
x18645
1283B
Candies Division
math
900
x23337
1283A
Minutes Before the New Year
math
800
x63269
1282A
Temporarily unavailable
implementation
,
math
900
x15607
1281A
Suffix Three
implementation
800
x19051
1279A
New Year Garland
math
900
x18071
1278A
Shuffle Hashing
brute force
,
implementation
,
strings
1000
x18675
1277A
Happy Birthday, Polycarp!
implementation
1000
x14701
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