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Before contest
Kotlin Heroes: Episode 11
04:57:14
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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
1131E
String Multiplication
dp
,
greedy
,
strings
2300
x1146
1131D
Gourmet choice
dfs and similar
,
dp
,
dsu
,
graphs
,
greedy
2000
x3255
1131B
Draw!
greedy
,
implementation
1400
x9721
1130C
Connect
brute force
,
dfs and similar
,
dsu
1400
x8576
1129E
Legendary Tree
binary search
,
interactive
,
trees
3100
x436
1129D
Isolation
data structures
,
dp
2900
x1054
1129C
Morse Code
binary search
,
data structures
,
dp
,
hashing
,
sortings
,
string suffix structures
,
strings
2400
x918
1129B
Wrong Answer
constructive algorithms
2000
x2204
1129A2
Toy Train
brute force
,
greedy
1800
x4098
1129A1
Toy Train (Simplified)
brute force
,
greedy
1700
x3818
1121C
System Testing
implementation
1600
x1995
1120F
Secret Letters
data structures
,
dp
,
greedy
3100
x256
1120E
The very same Munchhausen
brute force
2600
x124
1120D
Power Tree
dfs and similar
,
dp
,
dsu
,
graphs
,
greedy
,
trees
2500
x1364
1120C
Compress String
dp
,
strings
2100
x2104
1120B
Once in a casino
constructive algorithms
,
greedy
,
implementation
,
math
2700
x424
1120A
Diana and Liana
greedy
,
implementation
,
two pointers
1900
x1638
1119H
Triple
fft
,
math
3200
x565
1119G
Get Ready for the Battle
constructive algorithms
,
implementation
3100
x500
1119F
Niyaz and Small Degrees
data structures
,
dp
,
trees
3400
x720
1119E
Pavel and Triangles
brute force
,
dp
,
fft
,
greedy
,
ternary search
1900
x4998
1119D
Frets On Fire
binary search
,
sortings
1800
x4827
1119C
Ramesses and Corner Inversion
constructive algorithms
,
greedy
,
implementation
,
math
1500
x6828
1118F2
Tree Cutting (Hard Version)
combinatorics
,
dfs and similar
,
dp
,
trees
2700
x534
1118F1
Tree Cutting (Easy Version)
dfs and similar
,
trees
1800
x5918
1118E
Yet Another Ball Problem
constructive algorithms
,
implementation
1700
x4144
1118D2
Coffee and Coursework (Hard Version)
binary search
,
greedy
1700
x6275
1118D1
Coffee and Coursework (Easy version)
brute force
,
greedy
1700
x5679
1118C
Palindromic Matrix
constructive algorithms
,
implementation
1700
x5773
1117G
Recursive Queries
data structures
2500
x684
1117F
Crisp String
bitmasks
,
dp
2500
x577
1117E
Decypher the String
bitmasks
,
chinese remainder theorem
,
constructive algorithms
,
interactive
,
math
2200
x1513
1117D
Magic Gems
dp
,
math
,
matrices
2100
x4231
1117C
Magic Ship
binary search
1900
x7017
1115U3
Block unitary
*special problem
1700
x197
1115U2
Chessboard unitary
*special problem
1600
x234
1115U1
Anti-diagonal unitary
*special problem
1500
x256
1115G3
Palindrome checker oracle
*special problem
1600
x231
1115G2
OR oracle
*special problem
1600
x312
1114F
Please, another Queries on Array?
bitmasks
,
data structures
,
divide and conquer
,
math
,
number theory
2400
x1944
1114E
Arithmetic Progression
binary search
,
interactive
,
number theory
,
probabilities
2200
x2834
1114D
Flood Fill
dp
1900
x6783
1114C
Trailing Loves (or L'oeufs?)
brute force
,
implementation
,
math
,
number theory
1700
x7376
1114B
Yet Another Array Partitioning Task
constructive algorithms
,
greedy
,
sortings
1500
x8968
1111E
Tree
data structures
,
dfs and similar
,
dp
,
graphs
,
trees
2500
x927
1111D
Destroy the Colony
combinatorics
,
dp
,
math
2600
x960
1111C
Creative Snap
binary search
,
brute force
,
divide and conquer
,
math
1700
x6242
1111B
Average Superhero Gang Power
brute force
,
implementation
,
math
1700
x6244
1110H
Modest Substrings
dp
,
strings
3500
x282
1110G
Tree-Tac-Toe
constructive algorithms
,
games
,
trees
3100
x619
1110F
Nearest Leaf
data structures
,
trees
2600
x1732
1110E
Magic Stones
constructive algorithms
,
math
,
sortings
2200
x4160
1110D
Jongmah
dp
2200
x3535
1110C
Meaningless Operations
constructive algorithms
,
math
,
number theory
1500
x9368
1110B
Tape
greedy
,
sortings
1400
x11545
1109F
Sasha and Algorithm of Silence's Sounds
data structures
,
trees
3200
x292
1109E
Sasha and a Very Easy Test
data structures
,
number theory
2700
x526
1109D
Sasha and Interesting Fact from Graph Theory
brute force
,
combinatorics
,
dp
,
math
,
trees
2400
x1333
1109C
Sasha and a Patient Friend
binary search
,
data structures
,
implementation
2800
x254
1109B
Sasha and One More Name
constructive algorithms
,
hashing
,
strings
1800
x4357
1109A
Sasha and a Bit of Relax
dp
,
implementation
1600
x8491
1108F
MST Unification
binary search
,
dsu
,
graphs
,
greedy
2100
x2911
1108E2
Array and Segments (Hard version)
data structures
,
implementation
2100
x2205
1108E1
Array and Segments (Easy version)
brute force
,
greedy
,
implementation
1800
x4532
1108D
Diverse Garland
constructive algorithms
,
dp
,
greedy
1400
x15069
1107G
Vasya and Maximum Profit
binary search
,
constructive algorithms
,
data structures
,
dp
,
dsu
2400
x1050
1107F
Vasya and Endless Credits
dp
,
flows
,
graph matchings
,
graphs
,
sortings
2600
x792
1107E
Vasya and Binary String
dp
2400
x2289
1107D
Compression
dp
,
implementation
,
math
,
number theory
1800
x3723
1106F
Lunar New Year and a Recursive Sequence
math
,
matrices
,
number theory
2400
x978
1106E
Lunar New Year and Red Envelopes
data structures
,
dp
2100
x2555
1106D
Lunar New Year and a Wander
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1500
x14672
1106B
Lunar New Year and Food Ordering
data structures
,
implementation
1500
x6751
1105E
Helping Hiasat
bitmasks
,
brute force
,
dp
,
meet-in-the-middle
2200
x1636
1105D
Kilani and the Game
dfs and similar
,
graphs
,
implementation
,
shortest paths
1900
x4086
1105C
Ayoub and Lost Array
combinatorics
,
dp
,
math
1500
x10343
1103E
Radix sum
fft
,
math
,
number theory
3400
x234
1103D
Professional layer
bitmasks
,
dp
3100
x407
1103C
Johnny Solving
constructive algorithms
,
dfs and similar
,
graphs
,
math
2700
x843
1103B
Game with modulo
binary search
,
constructive algorithms
,
interactive
2000
x3276
1103A
Grid game
constructive algorithms
,
implementation
1400
x9765
1102F
Elongated Matrix
binary search
,
bitmasks
,
brute force
,
dp
,
graphs
2000
x1998
1102E
Monotonic Renumeration
combinatorics
,
sortings
1700
x5942
1102D
Balanced Ternary String
greedy
,
strings
1500
x7982
1102B
Array K-Coloring
greedy
,
sortings
1400
x10393
1101G
(Zero XOR Subset)-less
math
,
matrices
2300
x1712
1101F
Trucks and Cities
binary search
,
dp
2400
x1334
1101E
Polycarp's New Job
implementation
1500
x7810
1101D
GCD Counting
data structures
,
dfs and similar
,
dp
,
number theory
,
trees
2000
x4622
1101C
Division and Union
sortings
1500
x8004
1100F
Ivan and Burgers
data structures
,
divide and conquer
,
greedy
,
math
2500
x2426
1100E
Andrew and Taxi
binary search
,
dfs and similar
,
graphs
2200
x2362
1100D
Dasha and Chess
constructive algorithms
,
games
,
interactive
2500
x853
1099F
Cookies
binary search
,
data structures
,
dfs and similar
,
dp
,
games
,
trees
2400
x946
1098F
Ж-function
string suffix structures
,
strings
3500
x226
1098E
Fedya the Potter
binary search
,
implementation
,
math
,
number theory
3400
x222
1098D
Eels
data structures
2800
x772
1098C
Construct a tree
binary search
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2400
x1079
1098B
Nice table
brute force
,
constructive algorithms
,
greedy
,
math
2100
x1673
1098A
Sum in the tree
constructive algorithms
,
dfs and similar
,
greedy
,
trees
1600
x8750
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