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Codeforces Round 940 (Div. 2) and CodeCraft-23
2 days
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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
1176D
Recover it!
dfs and similar
,
graphs
,
greedy
,
number theory
,
sortings
1800
x5118
1176C
Lose it!
dp
,
greedy
,
implementation
1300
x13814
1176B
Merge it!
math
1100
x16743
1176A
Divide it!
brute force
,
greedy
,
implementation
800
x21740
1175G
Yet Another Partiton Problem
data structures
,
divide and conquer
,
dp
,
geometry
,
two pointers
3000
x425
1175F
The Number of Subpermutations
brute force
,
data structures
,
divide and conquer
,
hashing
,
math
2500
x1533
1175E
Minimal Segment Cover
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
greedy
,
implementation
,
trees
2200
x3168
1175D
Array Splitting
greedy
,
sortings
1900
x5623
1175C
Electrification
binary search
,
brute force
,
greedy
1600
x6587
1175B
Catch Overflow!
data structures
,
expression parsing
,
implementation
1600
x10066
1175A
From Hero to Zero
implementation
,
math
900
x17589
1174F
Ehab and the Big Finale
constructive algorithms
,
divide and conquer
,
graphs
,
implementation
,
interactive
,
trees
2400
x1433
1174E
Ehab and the Expected GCD Problem
combinatorics
,
dp
,
math
,
number theory
2500
x1345
1174D
Ehab and the Expected XOR Problem
bitmasks
,
constructive algorithms
1900
x4586
1174C
Ehab and a Special Coloring Problem
constructive algorithms
,
number theory
1300
x11770
1174B
Ehab Is an Odd Person
sortings
1200
x15069
1174A
Ehab Fails to Be Thanos
constructive algorithms
,
greedy
,
sortings
1000
x17144
1173B
Nauuo and Chess
constructive algorithms
,
greedy
1100
x8746
1173A
Nauuo and Votes
greedy
800
x15870
1172F
Nauuo and Bug
data structures
3300
x394
1172E
Nauuo and ODT
data structures
3300
x284
1172D
Nauuo and Portals
constructive algorithms
2900
x476
1172C2
Nauuo and Pictures (hard version)
dp
,
probabilities
2600
x721
1172C1
Nauuo and Pictures (easy version)
dp
,
probabilities
2300
x981
1172B
Nauuo and Circle
combinatorics
,
dfs and similar
,
dp
,
trees
1900
x3713
1172A
Nauuo and Cards
greedy
,
implementation
1800
x4699
1170I
Good Subsets
*special problem
,
dp
x35
1170H
Longest Saw
*special problem
,
constructive algorithms
x43
1170G
Graph Decomposition
*special problem
,
graphs
x68
1170F
Wheels
*special problem
,
binary search
,
greedy
x113
1170E
Sliding Doors
*special problem
,
binary search
x251
1170D
Decoding of Integer Sequences
*special problem
,
data structures
,
implementation
x412
1170C
Minus and Minus Give Plus
*special problem
,
implementation
,
strings
x769
1170B
Bad Days
*special problem
,
implementation
x990
1170A
Three Integers Again
*special problem
,
math
x1363
1169B
Pairs
graphs
,
implementation
1500
x9284
1169A
Circle Metro
implementation
,
math
900
x11516
1168E
Xor Permutations
constructive algorithms
,
math
3100
x352
1168D
Anagram Paths
dp
,
implementation
,
trees
3000
x333
1168C
And Reachability
bitmasks
,
dp
2200
x2319
1168B
Good Triple
brute force
,
two pointers
1900
x3300
1168A
Increasing by Modulo
binary search
,
greedy
1700
x6278
1167G
Low Budget Inception
brute force
,
geometry
3100
x145
1167F
Scalar Queries
combinatorics
,
data structures
,
math
,
sortings
2300
x1426
1167E
Range Deleting
binary search
,
combinatorics
,
data structures
,
two pointers
2100
x2385
1167D
Bicolored RBS
constructive algorithms
,
greedy
1500
x6685
1167C
News Distribution
dfs and similar
,
dsu
,
graphs
1400
x16716
1167B
Lost Numbers
brute force
,
divide and conquer
,
interactive
,
math
1400
x10411
1167A
Telephone Number
brute force
,
greedy
,
strings
800
x18637
1166F
Vicky's Delivery Service
data structures
,
dsu
,
graphs
,
hashing
2400
x682
1166E
The LCMs Must be Large
bitmasks
,
brute force
,
constructive algorithms
,
math
,
number theory
2100
x2638
1166D
Cute Sequences
binary search
,
brute force
,
greedy
,
math
2200
x1994
1166C
A Tale of Two Lands
binary search
,
sortings
,
two pointers
1500
x8925
1166B
All the Vowels Please
constructive algorithms
,
math
,
number theory
1100
x11106
1166A
Silent Classroom
combinatorics
,
greedy
900
x13800
1165F2
Microtransactions (hard version)
binary search
,
greedy
,
implementation
2000
x2015
1165F1
Microtransactions (easy version)
binary search
,
greedy
2000
x1759
1165E
Two Arrays and Sum of Functions
greedy
,
math
,
sortings
1600
x7668
1165D
Almost All Divisors
math
,
number theory
1600
x14949
1165C
Good String
greedy
1300
x12505
1165B
Polycarp Training
data structures
,
greedy
,
sortings
1000
x20125
1165A
Remainder
implementation
,
math
1100
x13405
1163F
Indecisive Taxi Fee
data structures
,
graphs
,
shortest paths
3000
x812
1163E
Magical Permutation
bitmasks
,
brute force
,
constructive algorithms
,
data structures
,
graphs
,
math
2400
x642
1163D
Mysterious Code
dp
,
strings
2100
x1207
1163C2
Power Transmission (Hard Edition)
data structures
,
geometry
,
implementation
,
math
1900
x3421
1163C1
Power Transmission (Easy Edition)
brute force
,
geometry
1900
x3147
1163B2
Cat Party (Hard Edition)
data structures
,
implementation
1600
x6891
1163B1
Cat Party (Easy Edition)
data structures
,
implementation
1500
x6731
1163A
Eating Soup
greedy
,
math
900
x12610
1162B
Double Matrix
brute force
,
greedy
1400
x5700
1162A
Zoning Restrictions Again
implementation
800
x8051
1160A2
Collaboration
*special problem
1159B
Expansion coefficient of the array
implementation
,
math
1300
x6860
1159A
A pile of stones
implementation
,
math
800
x12187
1158F
Density of subarrays
dp
,
math
3500
x391
1158E
Strange device
binary search
,
interactive
,
math
,
trees
3400
x146
1158D
Winding polygonal line
constructive algorithms
,
geometry
,
greedy
,
math
2600
x658
1158C
Permutation recovery
constructive algorithms
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
math
,
sortings
2100
x1692
1158B
The minimal unique substring
constructive algorithms
,
math
,
strings
2200
x2053
1158A
The Party and Sweets
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
,
two pointers
1500
x6715
1157G
Inverse of Rows and Columns
brute force
,
constructive algorithms
2200
x865
1157F
Maximum Balanced Circle
constructive algorithms
,
dp
,
greedy
,
two pointers
2000
x2443
1157E
Minimum Array
binary search
,
data structures
,
greedy
1700
x8071
1157D
N Problems During K Days
constructive algorithms
,
greedy
,
math
1900
x3546
1157C2
Increasing Subsequence (hard version)
greedy
1700
x7688
1157C1
Increasing Subsequence (easy version)
greedy
1300
x12300
1157B
Long Number
greedy
1300
x14331
1157A
Reachable Numbers
implementation
1100
x15306
1156G
Optimizer
graphs
,
greedy
,
hashing
,
implementation
2700
x119
1156F
Card Bag
dp
,
math
,
probabilities
2300
x1320
1156E
Special Segments of Permutation
data structures
,
divide and conquer
,
dsu
,
two pointers
2200
x2736
1156D
0-1-Tree
dfs and similar
,
divide and conquer
,
dp
,
dsu
,
trees
2200
x3523
1156C
Match Points
binary search
,
greedy
,
sortings
,
ternary search
,
two pointers
2000
x5740
1156B
Ugly Pairs
dfs and similar
,
greedy
,
implementation
,
sortings
,
strings
1800
x6071
1156A
Inscribed Figures
geometry
1400
x8027
1155F
Delivery Oligopoly
brute force
,
dp
,
graphs
2800
x397
1155E
Guess the Root
brute force
,
interactive
,
math
2200
x1388
1155D
Beautiful Array
brute force
,
data structures
,
divide and conquer
,
dp
,
greedy
1900
x6657
1155C
Alarm Clocks Everywhere
math
,
number theory
1300
x8976
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