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Problems
#
Name
1136E
Nastya Hasn't Written a Legend
binary search
,
data structures
2200
x1044
1136D
Nastya Is Buying Lunch
greedy
1800
x3749
1136C
Nastya Is Transposing Matrices
constructive algorithms
,
sortings
1500
x7625
1136B
Nastya Is Playing Computer Games
constructive algorithms
,
math
1000
x11542
1136A
Nastya Is Reading a Book
implementation
800
x16140
1133F2
Spanning Tree with One Fixed Degree
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
1900
x3121
1133F1
Spanning Tree with Maximum Degree
graphs
1600
x7386
1133E
K Balanced Teams
dp
,
sortings
,
two pointers
1800
x5226
1133D
Zero Quantity Maximization
hashing
,
math
,
number theory
1500
x10989
1133C
Balanced Team
sortings
,
two pointers
1200
x21410
1133B
Preparation for International Women's Day
math
,
number theory
1200
x12391
1133A
Middle of the Contest
implementation
1000
x16490
1132G
Greedy Subsequences
data structures
,
dp
,
trees
2400
x960
1132F
Clear the String
dp
2000
x7332
1132E
Knapsack
dfs and similar
,
dp
,
greedy
2300
x1401
1132D
Stressful Training
binary search
,
greedy
2300
x1817
1132C
Painting the Fence
brute force
1700
x5343
1132B
Discounts
greedy
,
sortings
900
x12752
1132A
Regular Bracket Sequence
greedy
,
implementation
1100
x9494
1131G
Most Dangerous Shark
data structures
,
dp
,
two pointers
2700
x401
1131F
Asya And Kittens
constructive algorithms
,
dsu
1700
x6409
1131E
String Multiplication
dp
,
greedy
,
strings
2300
x1122
1131D
Gourmet choice
dfs and similar
,
dp
,
dsu
,
graphs
,
greedy
2000
x3175
1131C
Birthday
binary search
,
greedy
,
sortings
1200
x14561
1131B
Draw!
greedy
,
implementation
1400
x9612
1131A
Sea Battle
math
800
x12333
1130C
Connect
brute force
,
dfs and similar
,
dsu
1400
x8345
1130B
Two Cakes
greedy
1200
x7704
1130A
Be Positive
implementation
800
x11458
1129E
Legendary Tree
binary search
,
interactive
,
trees
3100
x412
1129D
Isolation
data structures
,
dp
2900
x952
1129C
Morse Code
binary search
,
data structures
,
dp
,
hashing
,
sortings
,
string suffix structures
,
strings
2400
x898
1129B
Wrong Answer
constructive algorithms
2000
x2158
1129A2
Toy Train
brute force
,
greedy
1800
x4040
1129A1
Toy Train (Simplified)
brute force
,
greedy
1700
x3771
1121C
System Testing
implementation
1600
x1941
1121B
Mike and Children
brute force
,
implementation
1200
x8649
1121A
Technogoblet of Fire
implementation
,
sortings
1100
x7106
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
x1266
1120C
Compress String
dp
,
strings
2100
x1973
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
x517
1119G
Get Ready for the Battle
constructive algorithms
,
implementation
3100
x414
1119F
Niyaz and Small Degrees
data structures
,
dp
,
trees
3400
x662
1119E
Pavel and Triangles
brute force
,
dp
,
fft
,
greedy
,
ternary search
1900
x4897
1119D
Frets On Fire
binary search
,
sortings
1800
x4532
1119C
Ramesses and Corner Inversion
constructive algorithms
,
greedy
,
implementation
,
math
1500
x6580
1119B
Alyona and a Narrow Fridge
binary search
,
flows
,
greedy
,
sortings
1300
x9919
1119A
Ilya and a Colorful Walk
greedy
,
implementation
1100
x10445
1118F2
Tree Cutting (Hard Version)
combinatorics
,
dfs and similar
,
dp
,
trees
2700
x515
1118F1
Tree Cutting (Easy Version)
dfs and similar
,
trees
1800
x5705
1118E
Yet Another Ball Problem
constructive algorithms
,
implementation
1700
x4044
1118D2
Coffee and Coursework (Hard Version)
binary search
,
greedy
1700
x6059
1118D1
Coffee and Coursework (Easy version)
brute force
,
greedy
1700
x5524
1118C
Palindromic Matrix
constructive algorithms
,
implementation
1700
x5656
1118B
Tanya and Candies
implementation
1200
x11822
1118A
Water Buying
math
800
x19726
1117G
Recursive Queries
data structures
2500
x647
1117F
Crisp String
bitmasks
,
dp
2500
x517
1117E
Decypher the String
bitmasks
,
chinese remainder theorem
,
constructive algorithms
,
interactive
,
math
2200
x1456
1117D
Magic Gems
dp
,
math
,
matrices
2100
x4029
1117C
Magic Ship
binary search
1900
x6433
1117B
Emotes
greedy
,
math
,
sortings
1000
x13855
1117A
Best Subsegment
implementation
,
math
1100
x10910
1116D6
Hessenberg matrix
x74
1116D5
Creeper
x144
1116D4
TIE fighter
x164
1116D3
X-wing fighter
x198
1116D2
Pattern of increasing blocks
x228
1116D1
Block diagonal matrix
x271
1116C3
``Is the number of ones divisible by 3?'' oracle
x179
1116C2
``Is the bit string periodic?'' oracle
x181
1116C1
Alternating bits oracle
x260
1116B2
Not A, not B or not C?
x55
1116B1
Distinguish three-qubit states
x129
1116A2
Generate equal superposition of four basis states
x176
1116A1
Generate state |00⟩ + |01⟩ + |10⟩
x320
1115U3
Block unitary
*special problem
1700
x196
1115U2
Chessboard unitary
*special problem
1600
x229
1115U1
Anti-diagonal unitary
*special problem
1500
x251
1115G3
Palindrome checker oracle
*special problem
1600
x225
1115G2
OR oracle
*special problem
1600
x307
1115G1
AND oracle
*special problem
1100
x382
1114F
Please, another Queries on Array?
bitmasks
,
data structures
,
divide and conquer
,
math
,
number theory
2400
x1816
1114E
Arithmetic Progression
binary search
,
interactive
,
number theory
,
probabilities
2200
x2776
1114D
Flood Fill
dp
1900
x6550
1114C
Trailing Loves (or L'oeufs?)
brute force
,
implementation
,
math
,
number theory
1700
x7258
1114B
Yet Another Array Partitioning Task
constructive algorithms
,
greedy
,
sortings
1500
x8858
1114A
Got Any Grapes?
brute force
,
greedy
,
implementation
800
x18254
1113B
Sasha and Magnetic Machines
greedy
,
number theory
1300
x7670
1113A
Sasha and His Trip
dp
,
greedy
,
math
900
x17008
1111E
Tree
data structures
,
dfs and similar
,
dp
,
graphs
,
trees
2500
x851
1111D
Destroy the Colony
combinatorics
,
dp
,
math
2600
x924
1111C
Creative Snap
binary search
,
brute force
,
divide and conquer
,
math
1700
x6117
1111B
Average Superhero Gang Power
brute force
,
implementation
,
math
1700
x6187
1111A
Superhero Transformation
implementation
,
strings
1000
x16585
1110H
Modest Substrings
dp
,
strings
3500
x276
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binary search
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dfs and similar
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dp
dsu
expression parsing
fft
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games
geometry
graph matchings
graphs
greedy
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implementation
interactive
math
matrices
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number theory
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shortest paths
sortings
string suffix structures
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ternary search
trees
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