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Before contest
Codeforces Round 1124 (Div. 1)
10:26:51
Before contest
Codeforces Round 1124 (Div. 2)
10:26:51
→ Filter Problems
Difficulty:
—
combine-tags-by-or
*combine tags by OR
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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Status
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Custom test
Problems
#
Name
2264A
Rumb Needs a Hand
implementation
,
implementation
,
implementation
,
sortings
,
sortings
,
sortings
,
two pointers
,
two pointers
,
two pointers
800
x14126
2263B
Min Matrices
constructive algorithms
,
constructive algorithms
,
constructive algorithms
,
constructive algorithms
,
constructive algorithms
900
x12263
2263A
Min Max Game
games
800
x16158
2260B
Monocarp and Projects
brute force
,
math
,
number theory
900
x15028
2260A
Monocarp's Contest
implementation
800
x19425
2259B
Minus Two
math
,
number theory
,
number theory
,
number theory
,
number theory
,
number theory
800
x23851
2259A
Moo Language School
brute force
,
greedy
,
greedy
,
greedy
,
greedy
,
two pointers
800
x26890
2258B1
Carrot Chopdown (Easy Version)
brute force
,
games
,
math
900
x15336
2258A
Odd Eraser
math
800
x19035
2257B
Gigantomachy
math
,
math
800
x18963
2257A
Creating Abbreviations
brute force
,
strings
800
x20788
2256A
Three Numbers on the Blackboard
math
,
math
,
math
,
math
,
sortings
800
x25429
2254B
Evanescent
implementation
,
strings
,
two pointers
900
x25497
2254A
Riptide
implementation
,
sortings
800
x36630
2253A
The Best Card
greedy
,
math
,
number theory
800
x21375
2252A
Boss Fight
data structures
,
greedy
,
greedy
800
x18872
2250A
Threshold Movement
brute force
,
implementation
,
math
800
x19165
2248A
You Delete, I Delete
greedy
800
x20881
2247B
Yet Another Constructive
constructive algorithms
900
x16485
2247A
Zero Sum
constructive algorithms
,
dp
,
number theory
800
x22714
2246B
ezraft and Array
constructive algorithms
,
number theory
900
x17644
2246A
farmpiggie and Subset Sum
constructive algorithms
800
x19899
2245A
Who Watches the Watchpig?
greedy
800
x14229
2244B
Nikita and Books
greedy
,
greedy
,
math
,
math
,
sortings
,
sortings
800
x25243
2244A
Iskander and Drawings
dp
,
games
,
greedy
,
strings
800
x30668
2242A
Bigrams
sortings
,
strings
800
x25254
2241A
Divide and Conquer
greedy
,
math
,
number theory
800
x35495
2240A
Another Popcount Problem
greedy
800
x17290
2238B
Crimson Triples
dp
,
math
,
number theory
900
x16733
2238A
Another Puzzle from Papyrus
greedy
,
math
,
sortings
800
x20318
2237A
Destroying Towers
games
,
greedy
,
schedules
800
x22408
2236B
Tatar TV Show
greedy
,
math
,
strings
800
x29397
2236A
Games on the Train
greedy
,
math
800
x35927
2234B
Palindrome, Twelve and Two Terms
brute force
,
constructive algorithms
,
math
800
x22834
2234A
Euclid, Sequence and Two Numbers
math
,
number theory
,
sortings
800
x24861
2233B
Different Distances
constructive algorithms
900
x18593
2233A
AI Project Development
brute force
,
math
800
x23609
2232B
Cake Leveling
binary search
,
greedy
,
math
900
x21735
2232A
Convergence
greedy
,
sortings
,
sortings
,
sortings
800
x23822
2231A
Construct an Array
constructive algorithms
800
x26113
2230A
Optimal Purchase
implementation
,
math
800
x24172
2229C1
We Be Flipping (Easy Version)
constructive algorithms
,
greedy
900
x16410
2229B
Absolute Cinema
greedy
,
math
800
x19041
2229A
Slimes on a Line
brute force
,
greedy
,
math
800
x19140
2228A
Marisa Steals Reimu's Takeout
greedy
,
implementation
800
x22388
2227C
Snowfall
constructive algorithms
,
math
800
x23822
2227B
Party Monster
greedy
800
x28888
2227A
Koshary
implementation
,
math
800
x32878
2226B
Everything Everywhere
greedy
,
math
,
math
,
number theory
,
number theory
900
x15388
2226A
Disturbing Distribution
greedy
,
math
800
x16058
2225B
Alternating String
brute force
,
greedy
900
x17976
2225A
A Number Between Two Others
greedy
,
math
800
x22413
2224A
Zhily and Array Operating
constructive algorithms
,
greedy
800
x12408
2222A
A Wonderful Contest
brute force
,
dp
,
math
800
x12743
2220A
Blocked
greedy
,
sortings
800
x21777
2218C
The 67th Permutation Problem
constructive algorithms
,
greedy
,
math
800
x32207
2218B
The 67th 6-7 Integer Problem
greedy
,
math
800
x42329
2218A
The 67th Integer Problem
brute force
,
games
,
implementation
,
math
800
x44726
2217A
The Equalizer
math
800
x25625
2216A
Course Wishes
greedy
900
x6564
2211A
Antimedian Deletion
implementation
,
math
800
x18126
2210B
Simply Sitting on Chairs
data structures
,
greedy
900
x20136
2210A
A Simple Sequence
constructive algorithms
,
dp
,
greedy
,
number theory
800
x25237
2209B
Array
greedy
900
x22191
2209A
Flip Flops
greedy
800
x23882
2208A
Bingo Candies
constructive algorithms
,
math
800
x22463
2207A
1-1
greedy
,
strings
800
x15295
2205B
Simons and Cakes for Success
implementation
,
math
,
math
800
x17883
2205A
Simons and Making It Beautiful
brute force
,
constructive algorithms
,
constructive algorithms
,
constructive algorithms
,
constructive algorithms
,
constructive algorithms
,
constructive algorithms
800
x18909
2204B
Right Maximum
greedy
800
x21673
2204A
Passing the Ball
brute force
,
implementation
800
x23951
2203A
Towers of Boxes
math
800
x20319
2202A
Parkour Design
math
,
math
,
math
,
math
800
x17738
2200C
Specialty String
brute force
,
greedy
,
strings
900
x25057
2200B
Deletion Sort
bitmasks
,
brute force
,
greedy
,
sortings
800
x28783
2200A
Eating Game
greedy
800
x32155
2197A
Friendly Numbers
binary search
,
brute force
,
expression parsing
,
math
,
schedules
800
x24425
2195B
Heapify 1
implementation
,
sortings
900
x27415
2195A
Sieve of Erato67henes
math
,
number theory
800
x38701
2194A
Lawn Mower
greedy
,
math
800
x25485
2193B
Reverse a Permutation
greedy
800
x31748
2193A
DBMB and the Array
brute force
,
math
800
x45154
2192A
String Rotation Game
brute force
,
strings
800
x19256
2191A
Array Coloring
constructive algorithms
800
x29152
2189A
Table with Numbers
greedy
,
implementation
800
x25339
2188A
Divisible Permutation
constructive algorithms
800
x27036
2185C
Shifted MEX
implementation
,
sortings
900
x31498
2185B
Prefix Max
greedy
800
x44394
2185A
Perfect Root
constructive algorithms
,
math
800
x47127
2184A
Social Experiment
math
800
x40641
2183A
Binary Array Game
games
800
x24377
2182B
New Year Cake
brute force
800
x24536
2182A
New Year String
constructive algorithms
,
greedy
,
implementation
,
strings
800
x26589
2180B
Ashmal
greedy
,
strings
800
x25419
2180A
Carnival Wheel
brute force
,
number theory
800
x26694
2179B
Blackslex and Showering
dp
,
greedy
,
implementation
800
x29546
2179A
Blackslex and Password
math
,
strings
800
x35950
2178B
Impost or Sus
dp
,
greedy
,
implementation
,
strings
900
x22771
2178A
Yes or Yes
greedy
,
strings
800
x26893
2176A
Operations with Inversions
greedy
,
implementation
,
math
800
x30209
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