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Before contest
Codeforces Round 941 (Div. 1)
16:04:28
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Before contest
Codeforces Round 941 (Div. 2)
16:04:28
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→ Filter Problems
Difficulty:
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constructive algorithms
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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Problems
#
Name
1748D
ConstructOR
bitmasks
,
chinese remainder theorem
,
combinatorics
,
constructive algorithms
,
math
,
number theory
2100
x2653
1551D2
Domino (hard version)
constructive algorithms
,
implementation
,
math
2100
x2651
644B
Processing Queries
*special problem
,
constructive algorithms
,
data structures
,
two pointers
1700
x2601
246C
Beauty Pageant
brute force
,
constructive algorithms
,
greedy
1600
x2599
1730D
Prefixes and Suffixes
constructive algorithms
,
strings
,
two pointers
2200
x2586
725C
Hidden Word
brute force
,
constructive algorithms
,
implementation
,
strings
1600
x2584
763B
Timofey and rectangles
constructive algorithms
,
geometry
2100
x2575
1415E
New Game Plus!
constructive algorithms
,
greedy
,
math
2200
x2570
1250B
The Feast and the Bus
brute force
,
constructive algorithms
,
greedy
,
math
1800
x2558
1948E
Clique Partition
brute force
,
constructive algorithms
,
graphs
,
greedy
,
implementation
2100
x2536
1081E
Missing Numbers
binary search
,
constructive algorithms
,
greedy
,
math
,
number theory
1900
x2528
1559D2
Mocha and Diana (Hard Version)
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
trees
,
two pointers
2500
x2523
1157F
Maximum Balanced Circle
constructive algorithms
,
dp
,
greedy
,
two pointers
2000
x2510
487C
Prefix Product Sequence
constructive algorithms
,
math
,
number theory
2300
x2506
1214E
Petya and Construction Set
constructive algorithms
,
graphs
,
math
,
sortings
,
trees
2000
x2505
335A
Banana
binary search
,
constructive algorithms
,
greedy
1400
x2505
1495C
Garden of the Sun
constructive algorithms
,
graphs
2300
x2500
1725H
Hot Black Hot White
constructive algorithms
,
math
1800
x2495
1494D
Dogeforces
constructive algorithms
,
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
greedy
,
sortings
,
trees
2300
x2488
1404C
Fixed Point Removal
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
2300
x2484
911E
Stack Sorting
constructive algorithms
,
data structures
,
greedy
,
implementation
2000
x2460
128B
String
brute force
,
constructive algorithms
,
hashing
,
implementation
,
string suffix structures
,
strings
2100
x2452
180F
Mathematical Analysis Rocks!
constructive algorithms
,
implementation
,
math
1200
x2447
232A
Cycles
binary search
,
constructive algorithms
,
graphs
,
greedy
1600
x2443
1384B2
Koa and the Beach (Hard Version)
constructive algorithms
,
dp
,
greedy
,
implementation
2200
x2440
765D
Artsem and Saunders
constructive algorithms
,
dsu
,
math
1700
x2440
388B
Fox and Minimal path
bitmasks
,
constructive algorithms
,
graphs
,
implementation
,
math
1900
x2431
1003E
Tree Constructing
constructive algorithms
,
graphs
2100
x2421
547D
Mike and Fish
constructive algorithms
,
dfs and similar
,
graphs
2600
x2415
637C
Promocodes with Mistakes
*special problem
,
brute force
,
constructive algorithms
,
implementation
1400
x2409
538D
Weird Chess
brute force
,
constructive algorithms
,
implementation
1800
x2406
549G
Happy Line
constructive algorithms
,
greedy
,
sortings
2200
x2391
1736D
Equal Binary Subsequences
constructive algorithms
,
geometry
,
greedy
,
implementation
,
strings
2200
x2389
730B
Minimum and Maximum
constructive algorithms
,
interactive
1800
x2375
534D
Handshakes
binary search
,
constructive algorithms
,
data structures
,
greedy
1900
x2367
741C
Arpa’s overnight party and Mehrdad’s silent entering
constructive algorithms
,
dfs and similar
,
graphs
2600
x2364
141C
Queue
constructive algorithms
,
greedy
,
sortings
1800
x2364
1537F
Figure Fixing
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
2200
x2353
1526D
Kill Anton
brute force
,
constructive algorithms
,
data structures
,
math
,
strings
2200
x2351
847C
Sum of Nestings
constructive algorithms
1800
x2327
1196F
K-th Path
brute force
,
constructive algorithms
,
shortest paths
,
sortings
2200
x2299
780E
Underground Lab
constructive algorithms
,
dfs and similar
,
graphs
2100
x2291
29D
Ant on the Tree
constructive algorithms
,
dfs and similar
,
trees
2000
x2291
788B
Weird journey
combinatorics
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2100
x2279
1868B2
Candy Party (Hard Version)
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
implementation
,
math
2100
x2262
1408F
Two Different
constructive algorithms
,
divide and conquer
2300
x2258
985D
Sand Fortress
binary search
,
constructive algorithms
,
math
2100
x2253
721D
Maxim and Array
constructive algorithms
,
data structures
,
greedy
,
math
2000
x2250
840B
Leha and another game about graph
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
graphs
2100
x2239
468C
Hack it!
binary search
,
constructive algorithms
,
math
2500
x2235
1772F
Copy of a Copy of a Copy
constructive algorithms
,
dfs and similar
,
graphs
,
implementation
,
sortings
2000
x2217
327D
Block Tower
constructive algorithms
,
dfs and similar
,
graphs
1900
x2216
430A
Points and Segments (easy)
constructive algorithms
,
sortings
1600
x2214
245D
Restoring Table
constructive algorithms
,
greedy
1500
x2214
1840G1
In Search of Truth (Easy Version)
constructive algorithms
,
interactive
,
math
,
meet-in-the-middle
,
probabilities
2200
x2212
1704E
Count Seconds
brute force
,
constructive algorithms
,
dp
,
graphs
,
implementation
,
math
2200
x2212
1270E
Divide Points
constructive algorithms
,
geometry
,
math
2300
x2202
1477C
Nezzar and Nice Beatmap
constructive algorithms
,
geometry
,
greedy
,
math
,
sortings
2200
x2199
449C
Jzzhu and Apples
constructive algorithms
,
number theory
2500
x2193
1141G
Privatization of Roads in Treeland
binary search
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
1900
x2183
156B
Suspects
constructive algorithms
,
data structures
,
implementation
1600
x2181
1787E
The Harmonization of XOR
bitmasks
,
constructive algorithms
,
greedy
,
math
2100
x2169
533E
Correcting Mistakes
constructive algorithms
,
dp
,
greedy
,
hashing
,
strings
,
two pointers
1800
x2169
353B
Two Heaps
combinatorics
,
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
1900
x2169
1635E
Cars
2-sat
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
2200
x2161
484E
Sign on Fence
binary search
,
constructive algorithms
,
data structures
2500
x2161
1583E
Moment of Bloom
constructive algorithms
,
dfs and similar
,
graph matchings
,
graphs
,
greedy
,
trees
2200
x2160
145B
Lucky Number 2
constructive algorithms
1800
x2147
1129B
Wrong Answer
constructive algorithms
2000
x2146
1311E
Construct the Binary Tree
brute force
,
constructive algorithms
,
trees
2200
x2133
729E
Subordinates
constructive algorithms
,
data structures
,
graphs
,
greedy
,
sortings
1900
x2132
142B
Help General
constructive algorithms
,
greedy
,
implementation
1800
x2130
1876C
Autosynthesis
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
sortings
2100
x2124
553B
Kyoya and Permutation
binary search
,
combinatorics
,
constructive algorithms
,
greedy
,
implementation
,
math
1900
x2094
1672E
notepad.exe
binary search
,
constructive algorithms
,
greedy
,
interactive
2200
x2090
1695D1
Tree Queries (Easy Version)
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
2200
x2081
1358E
Are You Fired?
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x2077
488B
Candy Boxes
brute force
,
constructive algorithms
,
math
1900
x2076
1034B
Little C Loves 3 II
brute force
,
constructive algorithms
,
flows
,
graph matchings
2200
x2072
1158B
The minimal unique substring
constructive algorithms
,
math
,
strings
2200
x2062
1282D
Enchanted Artifact
constructive algorithms
,
interactive
,
strings
2300
x2059
896B
Ithea Plays With Chtholly
binary search
,
constructive algorithms
,
games
,
greedy
,
interactive
2000
x2047
1270G
Subset with Zero Sum
constructive algorithms
,
dfs and similar
,
graphs
,
math
2700
x2029
82B
Sets
constructive algorithms
,
hashing
,
implementation
1700
x2017
238A
Not Wool Sequences
constructive algorithms
,
math
1300
x2004
1619F
Let's Play the Hat?
brute force
,
constructive algorithms
,
greedy
,
math
2000
x1999
1090D
Similar Arrays
constructive algorithms
1800
x1981
452B
4-point polyline
brute force
,
constructive algorithms
,
geometry
,
trees
1800
x1976
335B
Palindrome
constructive algorithms
,
dp
1900
x1963
1089E
Easy Chess
constructive algorithms
1700
x1960
1023E
Down or Right
constructive algorithms
,
interactive
,
matrices
2100
x1950
1776G
Another Wine Tasting Event
combinatorics
,
constructive algorithms
,
math
,
strings
2100
x1945
358C
Dima and Containers
constructive algorithms
,
greedy
,
implementation
2000
x1943
1543D2
RPD and Rap Sheet (Hard Version)
brute force
,
constructive algorithms
,
interactive
,
math
2200
x1940
1392F
Omkar and Landslide
binary search
,
constructive algorithms
,
data structures
,
greedy
,
math
2400
x1939
1368E
Ski Accidents
constructive algorithms
,
graphs
,
greedy
2500
x1936
1375F
Integer Game
constructive algorithms
,
games
,
interactive
,
math
2600
x1928
161B
Discounts
constructive algorithms
,
greedy
,
sortings
1700
x1922
1695D2
Tree Queries (Hard Version)
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
2300
x1910
774D
Lie or Truth
*special problem
,
constructive algorithms
,
implementation
,
sortings
1500
x1903
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