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Rayan
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Before contest
Codeforces Round 997 (Div. 2)
38:49:05
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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
958D1
Hyperspace Jump (easy)
expression parsing
,
math
1400
x2095
958A1
Death Stars (easy)
implementation
1400
x1697
957A
Tritonic Iridescence
implementation
1300
x5805
955B
Not simply beatiful strings
implementation
1400
x4860
954D
Fight Against Traffic
dfs and similar
,
graphs
,
shortest paths
1600
x6781
954C
Matrix Walk
implementation
1700
x3808
954B
String Typing
implementation
,
strings
1400
x7319
952C
Ravioli Sort
implementation
1600
x2922
949B
A Leapfrog in the Array
constructive algorithms
,
math
1700
x3743
949A
Zebras
greedy
1600
x5433
946C
String Transformation
greedy
,
strings
1300
x8937
940D
Alena And The Heater
binary search
,
implementation
1600
x3657
940C
Phone Numbers
constructive algorithms
,
implementation
,
strings
1500
x5956
940B
Our Tanya is Crying Out Loud
dp
,
greedy
1400
x9092
939D
Love Rescue
dfs and similar
,
dsu
,
graphs
,
greedy
,
strings
1600
x7423
939C
Convenient For Everybody
binary search
,
two pointers
1600
x4656
938C
Constructing Tests
binary search
,
brute force
,
constructive algorithms
1700
x3370
937B
Vile Grasshoppers
brute force
,
math
,
number theory
1400
x6944
936A
Save Energy!
binary search
,
implementation
,
math
1700
x4377
935C
Fifa and Fafa
geometry
1600
x4785
934A
A Compatible Pair
brute force
,
games
1400
x7049
932C
Permutation Cycle
brute force
,
constructive algorithms
1600
x4060
932B
Recursive Queries
binary search
,
data structures
,
dfs and similar
1300
x8257
931C
Laboratory Work
implementation
,
math
1700
x3374
930B
Game with String
implementation
,
probabilities
,
strings
1600
x2710
930A
Peculiar apple-tree
dfs and similar
,
graphs
,
trees
1500
x7392
929C
Красивая команда
*special problem
,
combinatorics
,
math
1700
x1162
929B
Места в самолёте
*special problem
,
implementation
1300
x2049
929A
Прокат велосипедов
*special problem
,
greedy
,
implementation
1400
x2509
928B
Chat
*special problem
,
dp
1400
x2550
926I
A Vital Problem
1700
x669
926G
Large Bouquets
1500
x1494
926D
Choose Place
1600
x937
926C
Is This a Zebra?
implementation
1700
x1893
926A
2-3-numbers
implementation
,
math
1300
x3830
925B
Resource Distribution
binary search
,
implementation
,
sortings
1700
x2213
925A
Stairs and Elevators
binary search
1600
x3588
924C
Riverside Curio
data structures
,
dp
,
greedy
1700
x3895
924B
Three-level Laser
binary search
,
greedy
,
two pointers
1600
x5362
924A
Mystical Mosaic
greedy
,
implementation
1300
x5075
923B
Producing Snow
binary search
,
data structures
1600
x7389
923A
Primal Sport
math
,
number theory
1700
x5059
922C
Cave Painting
brute force
,
number theory
1600
x7213
922B
Magic Forest
brute force
1300
x8605
922A
Cloning Toys
implementation
1300
x11775
920C
Swap Adjacent Elements
dfs and similar
,
greedy
,
math
,
sortings
,
two pointers
1400
x9321
919D
Substring
dfs and similar
,
dp
,
graphs
1700
x10388
919C
Seat Arrangements
brute force
,
implementation
1300
x9035
917B
MADMAX
dfs and similar
,
dp
,
games
,
graphs
1700
x3579
916C
Jamie and Interesting Graph
constructive algorithms
,
graphs
,
shortest paths
1600
x5163
915C
Permute Digits
dp
,
greedy
1700
x7126
915B
Browser
implementation
1300
x7842
913C
Party Lemonade
bitmasks
,
dp
,
greedy
1600
x8002
912B
New Year's Eve
bitmasks
,
constructive algorithms
,
number theory
1300
x12366
911C
Three Garlands
brute force
,
constructive algorithms
1400
x7081
910C
Minimum Sum
constructive algorithms
,
greedy
,
math
1700
x1829
910B
Door Frames
greedy
,
implementation
1600
x1720
909B
Segments
constructive algorithms
,
math
1300
x6504
908C
New Year and Curling
brute force
,
geometry
,
implementation
,
math
1500
x6963
907B
Tic-Tac-Toe
implementation
1400
x4077
907A
Masha and Bears
brute force
,
implementation
1300
x5732
906A
Shockers
implementation
,
strings
1600
x4154
901A
Hashing Trees
constructive algorithms
,
trees
1500
x5141
900C
Remove Extra One
brute force
,
data structures
,
math
1700
x4603
900B
Position in Fraction
math
,
number theory
1300
x7911
899C
Dividing the numbers
constructive algorithms
,
graphs
,
math
1300
x8573
898E
Squares and not squares
constructive algorithms
,
greedy
1600
x4668
898D
Alarm Clock
greedy
1600
x4033
898C
Phone Numbers
implementation
,
strings
1400
x5340
897B
Chtholly's request
brute force
1300
x7232
896A
Nephren gives a riddle
binary search
,
dfs and similar
1700
x3483
895B
XK Segments
binary search
,
math
,
sortings
,
two pointers
1700
x3583
893C
Rumor
dfs and similar
,
graphs
,
greedy
1300
x24014
891A
Pride
brute force
,
dp
,
greedy
,
math
,
number theory
1500
x10536
888D
Almost Identity Permutations
combinatorics
,
dp
,
math
1600
x8674
888C
K-Dominant Character
binary search
,
implementation
,
two pointers
1400
x8342
887C
Solution for Cube
brute force
,
implementation
1500
x2915
887B
Cubes for Masha
brute force
,
implementation
1300
x5675
886C
Petya and Catacombs
dsu
,
greedy
,
implementation
,
trees
1300
x5493
884C
Bertown Subway
dfs and similar
,
greedy
,
math
1500
x4794
883F
Lost in Transliteration
implementation
1300
x2297
883E
Field of Wonders
implementation
,
strings
1500
x1921
878A
Short Program
bitmasks
,
constructive algorithms
1600
x5593
877C
Slava and tanks
constructive algorithms
1600
x5764
877B
Nikita and string
brute force
,
dp
1500
x10679
876B
Divisiblity of Differences
implementation
,
math
,
number theory
1300
x9404
875B
Sorting the Coins
dsu
,
implementation
,
sortings
,
two pointers
1500
x5243
873C
Strange Game On Matrix
greedy
,
two pointers
1600
x3337
873B
Balanced Substring
dp
,
implementation
1500
x7964
870C
Maximum splitting
dp
,
greedy
,
math
,
number theory
1300
x9276
868C
Qualification Rounds
bitmasks
,
brute force
,
constructive algorithms
,
dp
1500
x4663
868B
Race Against Time
implementation
1400
x3697
865A
Save the problem!
constructive algorithms
1400
x4356
864D
Make a Permutation!
greedy
,
implementation
,
math
1500
x6037
864C
Bus
greedy
,
implementation
,
math
1500
x5884
863B
Kayaking
brute force
,
greedy
,
sortings
1500
x8719
862B
Mahmoud and Ehab and the bipartiteness
dfs and similar
,
graphs
,
trees
1300
x18822
859C
Pie Rules
dp
,
games
1500
x5487
858D
Polycarp's phone book
data structures
,
implementation
,
sortings
1600
x3922
858C
Did you mean...
dp
,
greedy
,
implementation
1500
x5646
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