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Codeforces Round 1133 (Div. 1, Div. 2) is coming soon! Register
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Before contest
Codeforces Round 1133 (Div. 1)
13:07:15
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*has extra registration
Before contest
Codeforces Round 1133 (Div. 2)
13:07:16
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→ Filter Problems
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combine-tags-by-or
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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
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
2276A
Perfect Sandwiches
greedy
,
math
800
x19362
2275B
Did Not Go to Print
data structures
,
implementation
800
x22427
2275A
In Search of Convenience
geometry
,
implementation
800
x27082
2274A
The Projections of Paco
dfs and similar
,
dp
,
hashing
,
implementation
,
math
800
x8149
2271A
Robot Odd Moves
constructive algorithms
,
math
800
x11751
2269A
SauSaGe Bank
greedy
,
math
800
x21023
2267B
Fashionable Array
brute force
,
constructive algorithms
,
sortings
800
x16512
2267A
Turn Into a Palindrome
greedy
,
strings
800
x20745
2266B
Three Piles
games
,
greedy
,
math
800
x27283
2266A
Good Contest
greedy
800
x31390
2264A
Rumb Needs a Hand
implementation
,
implementation
,
implementation
,
sortings
,
sortings
,
sortings
,
two pointers
,
two pointers
,
two pointers
800
x16837
2263A
Min Max Game
games
800
x19074
2261A
Hey, It's Me, Souvlakity
games
,
math
800
x10736
2260A
Monocarp's Contest
implementation
800
x21889
2259B
Minus Two
math
,
number theory
,
number theory
,
number theory
,
number theory
,
number theory
800
x25970
2259A
Moo Language School
brute force
,
greedy
,
greedy
,
greedy
,
greedy
,
two pointers
800
x28960
2258A
Odd Eraser
math
800
x20370
2257B
Gigantomachy
math
,
math
800
x19804
2257A
Creating Abbreviations
brute force
,
strings
800
x21662
2256A
Three Numbers on the Blackboard
math
,
math
,
math
,
math
,
sortings
800
x26691
2254A
Riptide
implementation
,
sortings
800
x38499
2253A
The Best Card
greedy
,
math
,
number theory
800
x22598
2252A
Boss Fight
data structures
,
greedy
,
greedy
800
x19623
2250A
Threshold Movement
brute force
,
implementation
,
math
800
x19787
2248A
You Delete, I Delete
greedy
800
x21588
2247A
Zero Sum
constructive algorithms
,
dp
,
number theory
800
x23595
2246A
farmpiggie and Subset Sum
constructive algorithms
800
x20359
2245A
Who Watches the Watchpig?
greedy
800
x14692
2244B
Nikita and Books
greedy
,
greedy
,
math
,
math
,
sortings
,
sortings
800
x26088
2244A
Iskander and Drawings
dp
,
games
,
greedy
,
strings
800
x31502
2242A
Bigrams
sortings
,
strings
800
x25767
2241A
Divide and Conquer
greedy
,
math
,
number theory
800
x36483
2240A
Another Popcount Problem
greedy
800
x17601
2238A
Another Puzzle from Papyrus
greedy
,
math
,
sortings
800
x20736
2237A
Destroying Towers
games
,
greedy
,
schedules
800
x22790
2236B
Tatar TV Show
greedy
,
math
,
strings
800
x29924
2236A
Games on the Train
greedy
,
math
800
x36781
2234B
Palindrome, Twelve and Two Terms
brute force
,
constructive algorithms
,
math
800
x23141
2234A
Euclid, Sequence and Two Numbers
math
,
number theory
,
sortings
800
x25197
2233A
AI Project Development
brute force
,
math
800
x24057
2232A
Convergence
greedy
,
sortings
,
sortings
,
sortings
800
x24080
2231A
Construct an Array
constructive algorithms
800
x26497
2230A
Optimal Purchase
implementation
,
math
800
x24608
2229B
Absolute Cinema
greedy
,
math
800
x19389
2229A
Slimes on a Line
brute force
,
greedy
,
math
800
x19412
2228A
Marisa Steals Reimu's Takeout
greedy
,
implementation
800
x22690
2227C
Snowfall
constructive algorithms
,
math
800
x24194
2227B
Party Monster
greedy
800
x29418
2227A
Koshary
implementation
,
math
800
x33666
2226A
Disturbing Distribution
greedy
,
math
800
x16321
2225A
A Number Between Two Others
greedy
,
math
800
x22741
2224A
Zhily and Array Operating
constructive algorithms
,
greedy
800
x12589
2222A
A Wonderful Contest
brute force
,
dp
,
math
800
x12933
2220A
Blocked
greedy
,
sortings
800
x22067
2218C
The 67th Permutation Problem
constructive algorithms
,
greedy
,
math
800
x33051
2218B
The 67th 6-7 Integer Problem
greedy
,
math
800
x43916
2218A
The 67th Integer Problem
brute force
,
games
,
implementation
,
math
800
x46686
2217A
The Equalizer
math
800
x25911
2211A
Antimedian Deletion
implementation
,
math
800
x18275
2210A
A Simple Sequence
constructive algorithms
,
dp
,
greedy
,
number theory
800
x25504
2209A
Flip Flops
greedy
800
x24098
2208A
Bingo Candies
constructive algorithms
,
math
800
x22664
2207A
1-1
greedy
,
strings
800
x15500
2205B
Simons and Cakes for Success
implementation
,
math
,
math
800
x18051
2205A
Simons and Making It Beautiful
brute force
,
constructive algorithms
,
constructive algorithms
,
constructive algorithms
,
constructive algorithms
,
constructive algorithms
,
constructive algorithms
800
x19124
2204B
Right Maximum
greedy
800
x21917
2204A
Passing the Ball
brute force
,
implementation
800
x24167
2203A
Towers of Boxes
math
800
x20658
2202A
Parkour Design
math
,
math
,
math
,
math
800
x17910
2200B
Deletion Sort
bitmasks
,
brute force
,
greedy
,
sortings
800
x29325
2200A
Eating Game
greedy
800
x32744
2197A
Friendly Numbers
binary search
,
brute force
,
expression parsing
,
math
,
schedules
800
x24708
2195A
Sieve of Erato67henes
math
,
number theory
800
x39475
2194A
Lawn Mower
greedy
,
math
800
x25729
2193B
Reverse a Permutation
greedy
800
x31995
2193A
DBMB and the Array
brute force
,
math
800
x45586
2192A
String Rotation Game
brute force
,
strings
800
x19419
2191A
Array Coloring
constructive algorithms
800
x29350
2189A
Table with Numbers
greedy
,
implementation
800
x25472
2188A
Divisible Permutation
constructive algorithms
800
x27185
2185B
Prefix Max
greedy
800
x45284
2185A
Perfect Root
constructive algorithms
,
math
800
x48177
2184A
Social Experiment
math
800
x41163
2183A
Binary Array Game
games
800
x24504
2182B
New Year Cake
brute force
800
x24698
2182A
New Year String
constructive algorithms
,
greedy
,
implementation
,
strings
800
x26787
2180B
Ashmal
greedy
,
strings
800
x25588
2180A
Carnival Wheel
brute force
,
number theory
800
x26880
2179B
Blackslex and Showering
dp
,
greedy
,
implementation
800
x29742
2179A
Blackslex and Password
math
,
strings
800
x36248
2178A
Yes or Yes
greedy
,
strings
800
x27097
2176A
Operations with Inversions
greedy
,
implementation
,
math
800
x30454
2175A
Little Fairy's Painting
implementation
800
x19872
2173A
Sleeping Through Classes
greedy
,
implementation
800
x25007
2172A
ASCII Art Contest
implementation
800
x15868
2171A
Shizuku Hoshikawa and Farm Legs
brute force
,
math
800
x39345
2170A
Maximum Neighborhood
bitmasks
,
brute force
,
greedy
,
implementation
,
math
800
x21117
2167C
Isamatdin and His Magic Wand!
constructive algorithms
,
greedy
,
implementation
,
sortings
800
x38292
2167B
Your Name
sortings
,
strings
800
x56721
2167A
Square?
math
,
sortings
800
x65006
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