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2023 Post World Finals Online ICPC Challenge powered by Huawei
23:05:08
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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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Custom test
Problems
#
Name
1129B
Wrong Answer
constructive algorithms
2000
x2150
1129A2
Toy Train
brute force
,
greedy
1800
x3982
1129A1
Toy Train (Simplified)
brute force
,
greedy
1700
x3760
1121C
System Testing
implementation
1600
x1934
1121B
Mike and Children
brute force
,
implementation
1200
x8616
1121A
Technogoblet of Fire
implementation
,
sortings
1100
x7097
1120F
Secret Letters
data structures
,
dp
,
greedy
3100
x248
1120E
The very same Munchhausen
brute force
2600
x110
1120D
Power Tree
dfs and similar
,
dp
,
dsu
,
graphs
,
greedy
,
trees
2500
x1262
1120C
Compress String
dp
,
strings
2100
x1870
1120B
Once in a casino
constructive algorithms
,
greedy
,
implementation
,
math
2700
x405
1120A
Diana and Liana
greedy
,
implementation
,
two pointers
1900
x1618
1119H
Triple
fft
,
math
3200
x514
1119G
Get Ready for the Battle
constructive algorithms
,
implementation
3100
x413
1119F
Niyaz and Small Degrees
data structures
,
dp
,
trees
3400
x649
1119E
Pavel and Triangles
brute force
,
dp
,
fft
,
greedy
,
ternary search
1900
x4887
1119D
Frets On Fire
binary search
,
sortings
1800
x4500
1119C
Ramesses and Corner Inversion
constructive algorithms
,
greedy
,
implementation
,
math
1500
x6559
1119B
Alyona and a Narrow Fridge
binary search
,
flows
,
greedy
,
sortings
1300
x9819
1119A
Ilya and a Colorful Walk
greedy
,
implementation
1100
x10397
1118F2
Tree Cutting (Hard Version)
combinatorics
,
dfs and similar
,
dp
,
trees
2700
x509
1118F1
Tree Cutting (Easy Version)
dfs and similar
,
trees
1800
x5676
1118E
Yet Another Ball Problem
constructive algorithms
,
implementation
1700
x4036
1118D2
Coffee and Coursework (Hard Version)
binary search
,
greedy
1700
x6038
1118D1
Coffee and Coursework (Easy version)
brute force
,
greedy
1700
x5504
1118C
Palindromic Matrix
constructive algorithms
,
implementation
1700
x5646
1118B
Tanya and Candies
implementation
1200
x11786
1118A
Water Buying
math
800
x19664
1117G
Recursive Queries
data structures
2500
x643
1117F
Crisp String
bitmasks
,
dp
2500
x517
1117E
Decypher the String
bitmasks
,
chinese remainder theorem
,
constructive algorithms
,
interactive
,
math
2200
x1448
1117D
Magic Gems
dp
,
math
,
matrices
2100
x4009
1117C
Magic Ship
binary search
1900
x6374
1117B
Emotes
greedy
,
math
,
sortings
1000
x13796
1117A
Best Subsegment
implementation
,
math
1100
x10891
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
x1810
1114E
Arithmetic Progression
binary search
,
interactive
,
number theory
,
probabilities
2200
x2771
1114D
Flood Fill
dp
1900
x6519
1114C
Trailing Loves (or L'oeufs?)
brute force
,
implementation
,
math
,
number theory
1700
x7249
1114B
Yet Another Array Partitioning Task
constructive algorithms
,
greedy
,
sortings
1500
x8844
1114A
Got Any Grapes?
brute force
,
greedy
,
implementation
800
x18244
1113B
Sasha and Magnetic Machines
greedy
,
number theory
1300
x7660
1113A
Sasha and His Trip
dp
,
greedy
,
math
900
x16974
1111E
Tree
data structures
,
dfs and similar
,
dp
,
graphs
,
trees
2500
x840
1111D
Destroy the Colony
combinatorics
,
dp
,
math
2600
x920
1111C
Creative Snap
binary search
,
brute force
,
divide and conquer
,
math
1700
x6105
1111B
Average Superhero Gang Power
brute force
,
implementation
,
math
1700
x6181
1111A
Superhero Transformation
implementation
,
strings
1000
x16576
1110H
Modest Substrings
dp
,
strings
3500
x276
1110G
Tree-Tac-Toe
constructive algorithms
,
games
,
trees
3100
x602
1110F
Nearest Leaf
data structures
,
trees
2600
x1678
1110E
Magic Stones
constructive algorithms
,
math
,
sortings
2200
x3805
1110D
Jongmah
dp
2200
x3260
1110C
Meaningless Operations
constructive algorithms
,
math
,
number theory
1500
x8914
1110B
Tape
greedy
,
sortings
1400
x10613
1110A
Parity
math
900
x14547
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
x244
1109B
Sasha and One More Name
constructive algorithms
,
hashing
,
strings
1800
x4264
1109A
Sasha and a Bit of Relax
dp
,
implementation
1600
x8357
1108F
MST Unification
binary search
,
dsu
,
graphs
,
greedy
2100
x2555
1108E2
Array and Segments (Hard version)
data structures
,
implementation
2100
x2118
1108E1
Array and Segments (Easy version)
brute force
,
greedy
,
implementation
1800
x4412
1108D
Diverse Garland
constructive algorithms
,
dp
,
greedy
1400
x14694
1108C
Nice Garland
brute force
,
greedy
,
math
1300
x11750
1108B
Divisors of Two Integers
brute force
,
greedy
,
math
,
number theory
1100
x22390
1108A
Two distinct points
implementation
800
x21157
1107G
Vasya and Maximum Profit
binary search
,
constructive algorithms
,
data structures
,
dp
,
dsu
2400
x988
1107F
Vasya and Endless Credits
dp
,
flows
,
graph matchings
,
graphs
,
sortings
2600
x719
1107E
Vasya and Binary String
dp
2400
x2145
1107D
Compression
dp
,
implementation
,
math
,
number theory
1800
x3673
1107C
Brutality
greedy
,
sortings
,
two pointers
1300
x9645
1107B
Digital root
math
,
number theory
1000
x14815
1107A
Digits Sequence Dividing
greedy
,
strings
900
x11880
1106F
Lunar New Year and a Recursive Sequence
math
,
matrices
,
number theory
2400
x949
1106E
Lunar New Year and Red Envelopes
data structures
,
dp
2100
x2314
1106D
Lunar New Year and a Wander
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1500
x13904
1106C
Lunar New Year and Number Division
greedy
,
implementation
,
math
,
sortings
900
x14273
1106B
Lunar New Year and Food Ordering
data structures
,
implementation
1500
x6682
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