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Problems
#
Name
1131B
Draw!
greedy
,
implementation
1400
x9604
1131A
Sea Battle
math
800
x12325
1130C
Connect
brute force
,
dfs and similar
,
dsu
1400
x8326
1130B
Two Cakes
greedy
1200
x7698
1130A
Be Positive
implementation
800
x11448
1129E
Legendary Tree
binary search
,
interactive
,
trees
3100
x405
1129D
Isolation
data structures
,
dp
2900
x949
1129C
Morse Code
binary search
,
data structures
,
dp
,
hashing
,
sortings
,
string suffix structures
,
strings
2400
x896
1129B
Wrong Answer
constructive algorithms
2000
x2150
1129A2
Toy Train
brute force
,
greedy
1800
x4036
1129A1
Toy Train (Simplified)
brute force
,
greedy
1700
x3769
1121C
System Testing
implementation
1600
x1937
1121B
Mike and Children
brute force
,
implementation
1200
x8631
1121A
Technogoblet of Fire
implementation
,
sortings
1100
x7099
1120F
Secret Letters
data structures
,
dp
,
greedy
3100
x249
1120E
The very same Munchhausen
brute force
2600
x111
1120D
Power Tree
dfs and similar
,
dp
,
dsu
,
graphs
,
greedy
,
trees
2500
x1264
1120C
Compress String
dp
,
strings
2100
x1871
1120B
Once in a casino
constructive algorithms
,
greedy
,
implementation
,
math
2700
x405
1120A
Diana and Liana
greedy
,
implementation
,
two pointers
1900
x1619
1119H
Triple
fft
,
math
3200
x516
1119G
Get Ready for the Battle
constructive algorithms
,
implementation
3100
x414
1119F
Niyaz and Small Degrees
data structures
,
dp
,
trees
3400
x654
1119E
Pavel and Triangles
brute force
,
dp
,
fft
,
greedy
,
ternary search
1900
x4889
1119D
Frets On Fire
binary search
,
sortings
1800
x4503
1119C
Ramesses and Corner Inversion
constructive algorithms
,
greedy
,
implementation
,
math
1500
x6561
1119B
Alyona and a Narrow Fridge
binary search
,
flows
,
greedy
,
sortings
1300
x9840
1119A
Ilya and a Colorful Walk
greedy
,
implementation
1100
x10422
1118F2
Tree Cutting (Hard Version)
combinatorics
,
dfs and similar
,
dp
,
trees
2700
x512
1118F1
Tree Cutting (Easy Version)
dfs and similar
,
trees
1800
x5690
1118E
Yet Another Ball Problem
constructive algorithms
,
implementation
1700
x4039
1118D2
Coffee and Coursework (Hard Version)
binary search
,
greedy
1700
x6046
1118D1
Coffee and Coursework (Easy version)
brute force
,
greedy
1700
x5511
1118C
Palindromic Matrix
constructive algorithms
,
implementation
1700
x5649
1118B
Tanya and Candies
implementation
1200
x11802
1118A
Water Buying
math
800
x19675
1117G
Recursive Queries
data structures
2500
x645
1117F
Crisp String
bitmasks
,
dp
2500
x517
1117E
Decypher the String
bitmasks
,
chinese remainder theorem
,
constructive algorithms
,
interactive
,
math
2200
x1452
1117D
Magic Gems
dp
,
math
,
matrices
2100
x4017
1117C
Magic Ship
binary search
1900
x6390
1117B
Emotes
greedy
,
math
,
sortings
1000
x13823
1117A
Best Subsegment
implementation
,
math
1100
x10904
1116D6
Hessenberg matrix
x73
1116D5
Creeper
x143
1116D4
TIE fighter
x163
1116D3
X-wing fighter
x197
1116D2
Pattern of increasing blocks
x227
1116D1
Block diagonal matrix
x270
1116C3
``Is the number of ones divisible by 3?'' oracle
x178
1116C2
``Is the bit string periodic?'' oracle
x180
1116C1
Alternating bits oracle
x259
1116B2
Not A, not B or not C?
x53
1116B1
Distinguish three-qubit states
x127
1116A2
Generate equal superposition of four basis states
x174
1116A1
Generate state |00⟩ + |01⟩ + |10⟩
x318
1115U3
Block unitary
*special problem
1700
x195
1115U2
Chessboard unitary
*special problem
1600
x227
1115U1
Anti-diagonal unitary
*special problem
1500
x250
1115G3
Palindrome checker oracle
*special problem
1600
x224
1115G2
OR oracle
*special problem
1600
x305
1115G1
AND oracle
*special problem
1100
x381
1114F
Please, another Queries on Array?
bitmasks
,
data structures
,
divide and conquer
,
math
,
number theory
2400
x1812
1114E
Arithmetic Progression
binary search
,
interactive
,
number theory
,
probabilities
2200
x2771
1114D
Flood Fill
dp
1900
x6532
1114C
Trailing Loves (or L'oeufs?)
brute force
,
implementation
,
math
,
number theory
1700
x7251
1114B
Yet Another Array Partitioning Task
constructive algorithms
,
greedy
,
sortings
1500
x8850
1114A
Got Any Grapes?
brute force
,
greedy
,
implementation
800
x18246
1113B
Sasha and Magnetic Machines
greedy
,
number theory
1300
x7664
1113A
Sasha and His Trip
dp
,
greedy
,
math
900
x16986
1111E
Tree
data structures
,
dfs and similar
,
dp
,
graphs
,
trees
2500
x843
1111D
Destroy the Colony
combinatorics
,
dp
,
math
2600
x922
1111C
Creative Snap
binary search
,
brute force
,
divide and conquer
,
math
1700
x6108
1111B
Average Superhero Gang Power
brute force
,
implementation
,
math
1700
x6184
1111A
Superhero Transformation
implementation
,
strings
1000
x16579
1110H
Modest Substrings
dp
,
strings
3500
x276
1110G
Tree-Tac-Toe
constructive algorithms
,
games
,
trees
3100
x603
1110F
Nearest Leaf
data structures
,
trees
2600
x1679
1110E
Magic Stones
constructive algorithms
,
math
,
sortings
2200
x3805
1110D
Jongmah
dp
2200
x3261
1110C
Meaningless Operations
constructive algorithms
,
math
,
number theory
1500
x8921
1110B
Tape
greedy
,
sortings
1400
x10632
1110A
Parity
math
900
x14555
1109F
Sasha and Algorithm of Silence's Sounds
data structures
,
trees
3200
x280
1109E
Sasha and a Very Easy Test
data structures
,
number theory
2700
x494
1109D
Sasha and Interesting Fact from Graph Theory
brute force
,
combinatorics
,
dp
,
math
,
trees
2400
x1270
1109C
Sasha and a Patient Friend
binary search
,
data structures
,
implementation
2800
x245
1109B
Sasha and One More Name
constructive algorithms
,
hashing
,
strings
1800
x4264
1109A
Sasha and a Bit of Relax
dp
,
implementation
1600
x8361
1108F
MST Unification
binary search
,
dsu
,
graphs
,
greedy
2100
x2563
1108E2
Array and Segments (Hard version)
data structures
,
implementation
2100
x2121
1108E1
Array and Segments (Easy version)
brute force
,
greedy
,
implementation
1800
x4416
1108D
Diverse Garland
constructive algorithms
,
dp
,
greedy
1400
x14702
1108C
Nice Garland
brute force
,
greedy
,
math
1300
x11756
1108B
Divisors of Two Integers
brute force
,
greedy
,
math
,
number theory
1100
x22435
1108A
Two distinct points
implementation
800
x21169
1107G
Vasya and Maximum Profit
binary search
,
constructive algorithms
,
data structures
,
dp
,
dsu
2400
x989
1107F
Vasya and Endless Credits
dp
,
flows
,
graph matchings
,
graphs
,
sortings
2600
x725
1107E
Vasya and Binary String
dp
2400
x2149
1107D
Compression
dp
,
implementation
,
math
,
number theory
1800
x3682
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binary search
bitmasks
brute force
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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
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shortest paths
sortings
string suffix structures
strings
ternary search
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