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Codeforces Round 941 (Div. 1)
2 days
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Codeforces Round 941 (Div. 2)
2 days
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number theory
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
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geometry
graph matchings
graphs
greedy
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implementation
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Problems
#
Name
757B
Bash's Big Day
greedy
,
math
,
number theory
1400
x9789
1005D
Polycarp and Div 3
dp
,
greedy
,
number theory
1500
x9788
1091C
New Year and the Sphere Transmission
math
,
number theory
1400
x9774
1926E
Vlad and an Odd Ordering
binary search
,
bitmasks
,
data structures
,
dp
,
implementation
,
math
,
number theory
1500
x9772
414A
Mashmokh and Numbers
constructive algorithms
,
number theory
1500
x9621
264B
Good Sequences
dp
,
number theory
1500
x9592
1200C
Round Corridor
math
,
number theory
1400
x9584
891A
Pride
brute force
,
dp
,
greedy
,
math
,
number theory
1500
x9576
1485C
Floor and Mod
binary search
,
brute force
,
math
,
number theory
1700
x9503
1609C
Complex Market Analysis
binary search
,
dp
,
implementation
,
number theory
,
schedules
,
two pointers
1400
x9462
385C
Bear and Prime Numbers
binary search
,
brute force
,
data structures
,
dp
,
implementation
,
math
,
number theory
1700
x9360
1266C
Diverse Matrix
constructive algorithms
,
greedy
,
math
,
number theory
1400
x9345
1548B
Integers Have Friends
binary search
,
data structures
,
divide and conquer
,
math
,
number theory
,
two pointers
1800
x9247
898B
Proper Nutrition
brute force
,
implementation
,
number theory
1100
x9246
1033B
Square Difference
math
,
number theory
1100
x9138
1469D
Ceil Divisions
brute force
,
constructive algorithms
,
math
,
number theory
1700
x9125
337B
Routine Problem
greedy
,
math
,
number theory
1400
x9074
1155C
Alarm Clocks Everywhere
math
,
number theory
1300
x9056
742B
Arpa’s obvious problem and Mehrdad’s terrible solution
brute force
,
math
,
number theory
1500
x9022
1771C
Hossam and Trainees
greedy
,
math
,
number theory
1600
x8951
870C
Maximum splitting
dp
,
greedy
,
math
,
number theory
1300
x8950
678C
Joty and Chocolate
implementation
,
math
,
number theory
1600
x8920
1110C
Meaningless Operations
constructive algorithms
,
math
,
number theory
1500
x8907
490C
Hacking Cypher
brute force
,
math
,
number theory
,
strings
1700
x8897
1731C
Even Subarrays
bitmasks
,
brute force
,
hashing
,
math
,
number theory
1700
x8886
1401D
Maximum Distributed Tree
dfs and similar
,
dp
,
greedy
,
implementation
,
math
,
number theory
,
sortings
,
trees
1800
x8843
1612D
X-Magic Pair
math
,
number theory
1600
x8807
584D
Dima and Lisa
brute force
,
math
,
number theory
1800
x8797
876B
Divisiblity of Differences
implementation
,
math
,
number theory
1300
x8676
1907E
Good Triples
brute force
,
combinatorics
,
number theory
1600
x8674
1228C
Primes and Multiplication
math
,
number theory
1700
x8674
660A
Co-prime Array
greedy
,
implementation
,
math
,
number theory
1200
x8508
343A
Rational Resistance
math
,
number theory
1600
x8498
346A
Alice and Bob
games
,
math
,
number theory
1600
x8441
1295D
Same GCDs
math
,
number theory
1800
x8398
1062B
Math
greedy
,
math
,
number theory
1500
x8386
1061C
Multiplicity
data structures
,
dp
,
implementation
,
math
,
number theory
1700
x8324
1766D
Lucky Chains
math
,
number theory
1600
x8309
735B
Urbanization
greedy
,
number theory
,
sortings
1100
x8298
1034A
Enlarge GCD
number theory
1800
x8273
1770C
Koxia and Number Theory
brute force
,
chinese remainder theorem
,
math
,
number theory
1700
x8242
1732D1
Balance (Easy version)
brute force
,
data structures
,
implementation
,
number theory
1500
x8220
1497E1
Square-Free Division (easy version)
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
1700
x8017
1209B
Koala and Lights
implementation
,
math
,
number theory
1300
x7933
1702F
Equate Multisets
constructive algorithms
,
data structures
,
greedy
,
math
,
number theory
1700
x7900
361B
Levko and Permutation
constructive algorithms
,
math
,
number theory
1200
x7876
1260C
Infinite Fence
greedy
,
math
,
number theory
1700
x7861
858A
k-rounding
brute force
,
math
,
number theory
1100
x7840
1627D
Not Adding
brute force
,
dp
,
math
,
number theory
1900
x7799
1512G
Short Task
brute force
,
dp
,
math
,
number theory
1700
x7775
1025B
Weakened Common Divisor
brute force
,
greedy
,
number theory
1600
x7748
1798C
Candy Store
greedy
,
math
,
number theory
1700
x7746
299A
Ksusha and Array
brute force
,
number theory
,
sortings
1000
x7715
1777C
Quiz Master
binary search
,
math
,
number theory
,
sortings
,
two pointers
1700
x7663
1195D1
Submarine in the Rybinsk Sea (easy edition)
combinatorics
,
math
,
number theory
1500
x7659
1113B
Sasha and Magnetic Machines
greedy
,
number theory
1300
x7657
900B
Position in Fraction
math
,
number theory
1300
x7620
474F
Ant colony
data structures
,
math
,
number theory
2100
x7619
150A
Win or Freeze
games
,
math
,
number theory
1400
x7558
582A
GCD Table
constructive algorithms
,
greedy
,
number theory
1700
x7531
1852A
Ntarsis' Set
binary search
,
math
,
number theory
1800
x7517
1876B
Effects of Anti Pimples
combinatorics
,
number theory
,
sortings
1500
x7433
1244C
The Football Season
brute force
,
math
,
number theory
2000
x7407
1225D
Power Products
hashing
,
math
,
number theory
1800
x7363
515B
Drazil and His Happy Friends
brute force
,
dsu
,
meet-in-the-middle
,
number theory
1300
x7357
1928C
Physical Education Lesson
brute force
,
math
,
number theory
1600
x7347
1114C
Trailing Loves (or L'oeufs?)
brute force
,
implementation
,
math
,
number theory
1700
x7197
1866B
Battling with Numbers
combinatorics
,
math
,
number theory
1400
x7161
1178D
Prime Graph
constructive algorithms
,
greedy
,
math
,
number theory
1500
x7135
267A
Subtractions
math
,
number theory
900
x7116
1331B
Limericks
*special problem
,
math
,
number theory
x6975
840A
Leha and Function
combinatorics
,
greedy
,
math
,
number theory
,
sortings
1300
x6953
922C
Cave Painting
brute force
,
number theory
1600
x6832
937B
Vile Grasshoppers
brute force
,
math
,
number theory
1400
x6784
1690F
Shifting String
graphs
,
math
,
number theory
,
strings
1700
x6764
1706D1
Chopping Carrots (Easy Version)
binary search
,
brute force
,
constructive algorithms
,
greedy
,
number theory
1700
x6645
59B
Fortune Telling
implementation
,
number theory
1200
x6635
1932E
Final Countdown
implementation
,
math
,
number theory
1600
x6582
1656D
K-good
constructive algorithms
,
math
,
number theory
1900
x6573
633B
A Trivial Problem
brute force
,
constructive algorithms
,
math
,
number theory
1300
x6530
1152C
Neko does Maths
brute force
,
math
,
number theory
1800
x6516
986A
Fair
graphs
,
greedy
,
number theory
,
shortest paths
1600
x6511
495B
Modular Equations
math
,
number theory
1600
x6444
1822G1
Magic Triples (Easy Version)
brute force
,
data structures
,
math
,
number theory
1700
x6438
1475G
Strange Beauty
dp
,
math
,
number theory
,
sortings
1900
x6383
284A
Cows and Primitive Roots
implementation
,
math
,
number theory
1400
x6362
71C
Round Table Knights
dp
,
math
,
number theory
1600
x6212
920F
SUM and REPLACE
brute force
,
data structures
,
dsu
,
number theory
2000
x6190
158D
Ice Sculptures
*special problem
,
brute force
,
number theory
1300
x6169
1470B
Strange Definition
bitmasks
,
graphs
,
hashing
,
math
,
number theory
1900
x6136
559C
Gerald and Giant Chess
combinatorics
,
dp
,
math
,
number theory
2200
x6128
992B
Nastya Studies Informatics
math
,
number theory
1600
x6080
817A
Treasure Hunt
implementation
,
math
,
number theory
1200
x6049
833A
The Meaningless Game
math
,
number theory
1700
x6013
1505B
DMCA
*special problem
,
implementation
,
number theory
1600
x5993
1635D
Infinite Set
bitmasks
,
dp
,
math
,
matrices
,
number theory
,
strings
1800
x5984
1848C
Vika and Price Tags
math
,
number theory
1800
x5915
1184A1
Heidi Learns Hashing (Easy)
brute force
,
math
,
number theory
1200
x5816
1775D
Friendly Spiders
dfs and similar
,
graphs
,
math
,
number theory
,
shortest paths
1800
x5734
1359E
Modular Stability
combinatorics
,
math
,
number theory
2000
x5721
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