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Pinely Round 4 (Div. 1 + Div. 2)
07:59:32
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Difficulty:
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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
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Status
Standings
Custom test
Problems
#
Name
978D
Almost Arithmetic Progression
brute force
,
implementation
,
math
1500
x8580
977F
Consecutive Subsequence
dp
1700
x17725
977E
Cyclic Components
dfs and similar
,
dsu
,
graphs
1500
x19948
977D
Divide by three, multiply by two
dfs and similar
,
math
,
sortings
1400
x17999
976C
Nested Segments
greedy
,
implementation
,
sortings
1500
x6681
975C
Valhalla Siege
binary search
1400
x9477
963A
Alternating Sum
math
,
number theory
1800
x3263
962D
Merge Equals
data structures
,
implementation
1600
x6767
962C
Make a Square
brute force
,
implementation
,
math
1400
x7783
961C
Chessboard
bitmasks
,
brute force
,
implementation
1400
x5267
960C
Subsequence Counting
bitmasks
,
constructive algorithms
,
greedy
,
implementation
1700
x3899
960B
Minimize the error
data structures
,
greedy
,
sortings
1500
x7670
959C
Mahmoud and Ehab and the wrong algorithm
constructive algorithms
,
trees
1500
x5731
958F2
Lightsabers (medium)
binary search
,
two pointers
1800
x1216
958F1
Lightsabers (easy)
implementation
1500
x1597
958E1
Guard Duty (easy)
brute force
,
geometry
,
greedy
,
math
1600
x1493
958D1
Hyperspace Jump (easy)
expression parsing
,
math
1400
x2056
958A1
Death Stars (easy)
implementation
1400
x1643
955B
Not simply beatiful strings
implementation
1400
x4782
954D
Fight Against Traffic
dfs and similar
,
graphs
,
shortest paths
1600
x6461
954C
Matrix Walk
implementation
1700
x3756
954B
String Typing
implementation
,
strings
1400
x7187
952D
I'm Feeling Lucky!
probabilities
1800
x2423
952C
Ravioli Sort
implementation
1600
x2891
949B
A Leapfrog in the Array
constructive algorithms
,
math
1700
x3705
949A
Zebras
greedy
1600
x5278
946D
Timetable
dp
1800
x4318
940D
Alena And The Heater
binary search
,
implementation
1600
x3599
940C
Phone Numbers
constructive algorithms
,
implementation
,
strings
1500
x5741
940B
Our Tanya is Crying Out Loud
dp
,
greedy
1400
x8910
939E
Maximize!
binary search
,
greedy
,
ternary search
,
two pointers
1800
x3064
939D
Love Rescue
dfs and similar
,
dsu
,
graphs
,
greedy
,
strings
1600
x7212
939C
Convenient For Everybody
binary search
,
two pointers
1600
x4608
938C
Constructing Tests
binary search
,
brute force
,
constructive algorithms
1700
x3290
937B
Vile Grasshoppers
brute force
,
math
,
number theory
1400
x6828
936A
Save Energy!
binary search
,
implementation
,
math
1700
x4341
935C
Fifa and Fafa
geometry
1600
x4706
934A
A Compatible Pair
brute force
,
games
1400
x6788
933A
A Twisty Movement
dp
1800
x4881
932C
Permutation Cycle
brute force
,
constructive algorithms
1600
x3994
931C
Laboratory Work
implementation
,
math
1700
x3336
930B
Game with String
implementation
,
probabilities
,
strings
1600
x2633
930A
Peculiar apple-tree
dfs and similar
,
graphs
,
trees
1500
x6955
929C
Красивая команда
*special problem
,
combinatorics
,
math
1700
x1150
929A
Прокат велосипедов
*special problem
,
greedy
,
implementation
1400
x2493
928B
Chat
*special problem
,
dp
1400
x2519
926I
A Vital Problem
1700
x654
926G
Large Bouquets
1500
x1469
926D
Choose Place
1600
x905
926C
Is This a Zebra?
implementation
1700
x1874
926B
Add Points
math
,
number theory
1800
x1635
925B
Resource Distribution
binary search
,
implementation
,
sortings
1700
x2185
925A
Stairs and Elevators
binary search
1600
x3380
924C
Riverside Curio
data structures
,
dp
,
greedy
1700
x3739
924B
Three-level Laser
binary search
,
greedy
,
two pointers
1600
x5163
923C
Perfect Security
data structures
,
greedy
,
strings
,
trees
1800
x4218
923B
Producing Snow
binary search
,
data structures
1600
x7241
923A
Primal Sport
math
,
number theory
1700
x4997
922D
Robot Vacuum Cleaner
greedy
,
sortings
1800
x4318
922C
Cave Painting
brute force
,
number theory
1600
x6973
920C
Swap Adjacent Elements
dfs and similar
,
greedy
,
math
,
sortings
,
two pointers
1400
x9084
919D
Substring
dfs and similar
,
dp
,
graphs
1700
x9675
917B
MADMAX
dfs and similar
,
dp
,
games
,
graphs
1700
x3505
917A
The Monster
dp
,
greedy
,
implementation
,
math
1800
x3495
916C
Jamie and Interesting Graph
constructive algorithms
,
graphs
,
shortest paths
1600
x5052
915C
Permute Digits
dp
,
greedy
1700
x6966
914C
Travelling Salesman and Special Numbers
brute force
,
combinatorics
,
dp
1800
x3694
913D
Too Easy Problems
binary search
,
brute force
,
data structures
,
greedy
,
sortings
1800
x4655
913C
Party Lemonade
bitmasks
,
dp
,
greedy
1600
x7816
911D
Inversion Counting
brute force
,
math
1800
x4535
911C
Three Garlands
brute force
,
constructive algorithms
1400
x6993
910C
Minimum Sum
constructive algorithms
,
greedy
,
math
1700
x1760
910B
Door Frames
greedy
,
implementation
1600
x1688
909C
Python Indentation
dp
1800
x4822
908C
New Year and Curling
brute force
,
geometry
,
implementation
,
math
1500
x6813
907B
Tic-Tac-Toe
implementation
1400
x4046
906A
Shockers
implementation
,
strings
1600
x4113
901A
Hashing Trees
constructive algorithms
,
trees
1500
x5043
900C
Remove Extra One
brute force
,
data structures
,
math
1700
x4515
899D
Shovel Sale
constructive algorithms
,
math
1800
x2729
898E
Squares and not squares
constructive algorithms
,
greedy
1600
x4530
898D
Alarm Clock
greedy
1600
x3845
898C
Phone Numbers
implementation
,
strings
1400
x5217
896A
Nephren gives a riddle
binary search
,
dfs and similar
1700
x3427
895B
XK Segments
binary search
,
math
,
sortings
,
two pointers
1700
x3449
894B
Ralph And His Magic Field
combinatorics
,
constructive algorithms
,
math
,
number theory
1800
x4419
891A
Pride
brute force
,
dp
,
greedy
,
math
,
number theory
1500
x9908
888E
Maximum Subsequence
bitmasks
,
divide and conquer
,
meet-in-the-middle
1800
x6993
888D
Almost Identity Permutations
combinatorics
,
dp
,
math
1600
x7983
888C
K-Dominant Character
binary search
,
implementation
,
two pointers
1400
x8153
887C
Solution for Cube
brute force
,
implementation
1500
x2880
884C
Bertown Subway
dfs and similar
,
greedy
,
math
1500
x4654
883K
Road Widening
constructive algorithms
,
greedy
,
implementation
1800
x1083
883H
Palindromic Cut
brute force
,
implementation
,
strings
1800
x1597
883E
Field of Wonders
implementation
,
strings
1500
x1890
878A
Short Program
bitmasks
,
constructive algorithms
1600
x5348
877C
Slava and tanks
constructive algorithms
1600
x5640
877B
Nikita and string
brute force
,
dp
1500
x10222
875B
Sorting the Coins
dsu
,
implementation
,
sortings
,
two pointers
1500
x5175
873D
Merge Sort
constructive algorithms
,
divide and conquer
1800
x3051
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