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Name
1807G2
Subsequence Addition (Hard Version)
bitmasks
,
dp
,
greedy
,
implementation
,
sortings
1100
x17589
1807G1
Subsequence Addition (Easy Version)
brute force
,
data structures
,
dp
,
greedy
,
implementation
,
sortings
1100
x17773
1807F
Bouncy Ball
brute force
,
dfs and similar
,
implementation
1700
x5842
1807E
Interview
binary search
,
implementation
,
interactive
1300
x11780
1807D
Odd Queries
data structures
,
implementation
900
x28452
1807C
Find and Replace
greedy
,
implementation
,
strings
800
x29066
1807B
Grab the Candies
greedy
800
x39564
1807A
Plus or Minus
implementation
800
x55258
1806F2
GCD Master (hard version)
greedy
,
math
,
sortings
2900
x265
1806F1
GCD Master (easy version)
greedy
,
math
,
number theory
,
sortings
2900
x328
1806E
Tree Master
brute force
,
data structures
,
dfs and similar
,
trees
2200
x2671
1806D
DSU Master
combinatorics
,
dp
,
dsu
,
math
2500
x839
1806C
Sequence Master
brute force
,
constructive algorithms
,
math
1600
x7167
1806B
Mex Master
constructive algorithms
,
greedy
900
x17006
1806A
Walking Master
geometry
,
greedy
,
math
800
x22145
1805F2
Survival of the Weakest (hard version)
greedy
,
math
,
sortings
,
two pointers
3100
x319
1805F1
Survival of the Weakest (easy version)
binary search
,
brute force
,
implementation
,
math
,
sortings
2600
x806
1805E
There Should Be a Lot of Maximums
brute force
,
data structures
,
dfs and similar
,
dp
,
trees
,
two pointers
2300
x1518
1805D
A Wide, Wide Graph
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
1800
x6012
1805C
Place for a Selfie
binary search
,
data structures
,
geometry
,
math
1400
x11971
1805B
The String Has a Target
greedy
,
strings
800
x18151
1805A
We Need the Zero
bitmasks
,
brute force
800
x20866
1804H
Code Lock
bitmasks
,
dp
3300
x168
1804G
Flow Control
data structures
,
dsu
,
implementation
3500
x193
1804F
Approximate Diameter
binary search
,
divide and conquer
,
graphs
,
shortest paths
2700
x849
1804E
Routing
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
2400
x1354
1804D
Accommodation
brute force
,
dp
,
greedy
,
implementation
2000
x4409
1804C
Pull Your Luck
brute force
,
greedy
,
math
,
number theory
1500
x11462
1804B
Vaccination
greedy
,
implementation
1000
x13749
1804A
Lame King
greedy
,
math
800
x17653
1802B
Settlement of Guinea Pigs
greedy
,
implementation
,
math
1000
x12875
1802A
Likes
greedy
,
implementation
800
x15499
1801G
A task for substrings
data structures
,
string suffix structures
,
strings
3400
x335
1801F
Another n-dimensional chocolate bar
dp
,
math
,
meet-in-the-middle
,
number theory
2700
x544
1801E
Gasoline prices
data structures
,
divide and conquer
,
dsu
,
hashing
,
trees
3000
x432
1801D
The way home
binary search
,
data structures
,
dp
,
graphs
,
greedy
,
shortest paths
,
sortings
2100
x2030
1801C
Music Festival
binary search
,
data structures
,
dp
,
greedy
,
sortings
1900
x3195
1801B
Buying gifts
data structures
,
greedy
,
sortings
1800
x5770
1801A
The Very Beautiful Blanket
bitmasks
,
constructive algorithms
1600
x8079
1800G
Symmetree
dfs and similar
,
hashing
,
implementation
,
trees
2200
x1917
1800F
Dasha and Nightmares
bitmasks
,
hashing
,
meet-in-the-middle
,
strings
1900
x3669
1800E2
Unforgivable Curse (hard version)
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
strings
1500
x11981
1800E1
Unforgivable Curse (easy version)
brute force
,
constructive algorithms
,
dsu
,
graphs
,
greedy
,
strings
1400
x12091
1800D
Remove Two Letters
data structures
,
greedy
,
hashing
,
strings
1200
x21587
1800C2
Powering the Hero (hard version)
data structures
,
greedy
1100
x21229
1800C1
Powering the Hero (easy version)
data structures
,
greedy
1000
x22279
1800B
Count the Number of Pairs
greedy
,
strings
1000
x23860
1800A
Is It a Cat?
implementation
,
strings
800
x29889
1799H
Tree Cutting
bitmasks
,
dfs and similar
,
dp
3200
x270
1799G
Count Voting
combinatorics
,
dp
,
math
2600
x696
1799F
Halve or Subtract
binary search
,
brute force
,
dp
,
greedy
,
sortings
2700
x765
1799E
City Union
constructive algorithms
,
dfs and similar
,
dsu
,
geometry
,
greedy
,
implementation
,
math
2300
x1151
1799D2
Hot Start Up (hard version)
data structures
,
dp
2100
x2251
1799D1
Hot Start Up (easy version)
dp
1900
x4038
1799C
Double Lexicographically Minimum
greedy
,
strings
1700
x5432
1799B
Equalize by Divide
brute force
,
constructive algorithms
,
greedy
,
math
1200
x10787
1799A
Recent Actions
data structures
,
greedy
,
implementation
,
math
800
x11339
1798F
Gifts from Grandfather Ahmed
dp
,
math
,
number theory
2500
x467
1798E
Multitest Generator
brute force
,
dp
2300
x1494
1798D
Shocking Arrangement
constructive algorithms
,
greedy
,
math
1600
x8986
1798C
Candy Store
greedy
,
math
,
number theory
1700
x7748
1798B
Three Sevens
brute force
,
data structures
,
greedy
,
implementation
1000
x15842
1798A
Showstopper
greedy
,
implementation
,
sortings
800
x19313
1797F
Li Hua and Path
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
trees
3000
x328
1797E
Li Hua and Array
brute force
,
data structures
,
dsu
,
math
,
number theory
,
two pointers
2300
x1179
1797D
Li Hua and Tree
brute force
,
data structures
,
dfs and similar
,
dp
,
implementation
,
trees
1900
x3681
1797C
Li Hua and Chess
constructive algorithms
,
greedy
,
interactive
1600
x7190
1797B
Li Hua and Pattern
constructive algorithms
,
greedy
1100
x14430
1797A
Li Hua and Maze
constructive algorithms
,
flows
,
graphs
,
greedy
,
implementation
800
x16888
1796F
Strange Triples
brute force
,
math
,
number theory
2900
x167
1796E
Colored Subgraphs
dfs and similar
,
dp
,
games
,
greedy
,
trees
2500
x685
1796D
Maximum Subarray
data structures
,
dp
,
greedy
,
two pointers
2000
x3855
1796C
Maximum Set
binary search
,
math
1600
x9720
1796B
Asterisk-Minor Template
implementation
,
strings
1000
x15984
1796A
Typical Interview Problem
brute force
,
implementation
,
strings
800
x18530
1795G
Removal Sequences
bitmasks
,
dfs and similar
,
graphs
2700
x644
1795F
Blocking Chips
binary search
,
constructive algorithms
,
dfs and similar
,
greedy
,
trees
2400
x1039
1795E
Explosions?
binary search
,
data structures
,
dp
,
greedy
,
math
2200
x1904
1795D
Triangle Coloring
combinatorics
,
math
1600
x8415
1795C
Tea Tasting
binary search
,
data structures
,
implementation
1500
x11335
1795B
Ideal Point
brute force
,
geometry
,
greedy
900
x21118
1795A
Two Towers
brute force
,
implementation
,
strings
800
x23210
1794E
Labeling the Tree with Distances
data structures
,
dp
,
greedy
,
hashing
,
implementation
,
trees
2400
x1003
1794D
Counting Factorizations
combinatorics
,
divide and conquer
,
dp
,
math
,
number theory
1900
x3333
1794C
Scoring Subsequences
binary search
,
greedy
,
math
,
two pointers
1300
x12393
1794B
Not Dividing
constructive algorithms
,
greedy
,
math
900
x19322
1794A
Prefix and Suffix Array
strings
800
x16530
1793F
Rebrending
brute force
,
data structures
,
divide and conquer
,
implementation
2600
x1271
1793E
Velepin and Marketing
binary search
,
data structures
,
dp
,
greedy
,
sortings
,
two pointers
2600
x923
1793D
Moscow Gorillas
binary search
,
dp
,
greedy
,
implementation
,
math
,
two pointers
1800
x5733
1793C
Dora and Search
constructive algorithms
,
data structures
,
two pointers
1200
x18014
1793B
Fedya and Array
constructive algorithms
,
math
1100
x15191
1793A
Yet Another Promotion
greedy
,
math
800
x17692
1792F2
Graph Coloring (hard version)
brute force
,
combinatorics
,
divide and conquer
,
dp
,
fft
,
graphs
2900
x372
1792F1
Graph Coloring (easy version)
combinatorics
,
dp
,
graphs
2700
x664
1792E
Divisors and Table
brute force
,
dfs and similar
,
dp
,
number theory
2400
x1300
1792D
Fixed Prefix Permutations
binary search
,
bitmasks
,
data structures
,
hashing
,
math
,
sortings
1700
x5858
1792C
Min Max Sort
binary search
,
brute force
,
greedy
,
math
,
two pointers
1500
x13133
1792B
Stand-up Comedian
greedy
,
math
1200
x20123
1792A
GamingForces
greedy
,
sortings
800
x27089
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→ Pay attention
Before contest
Codeforces Round 941 (Div. 1)
35:09:24
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*has extra registration
Before contest
Codeforces Round 941 (Div. 2)
35:09:24
Register now »
*has extra registration
→ Filter Problems
Difficulty:
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combine-tags-by-or
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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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