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Rayan
→ Pay attention
Before contest
Codeforces Round 994 (Div. 2)
19:28:16
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*has extra registration
→ Filter Problems
Difficulty:
—
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
1077D
Cutting Out
binary search
,
sortings
1600
x9066
1065C
Make It Equal
greedy
1600
x7910
1062C
Banh-mi
greedy
,
implementation
,
math
1600
x5514
1060C
Maximum Subrectangle
binary search
,
implementation
,
two pointers
1600
x4928
1059C
Sequence Transformation
constructive algorithms
,
math
1600
x7205
1056D
Decorate Apple Tree
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
sortings
,
trees
1600
x6007
1056B
Divide Candies
math
,
number theory
1600
x4245
1045I
Palindrome Pairs
hashing
,
strings
1600
x4549
1041C
Coffee Break
binary search
,
data structures
,
greedy
,
two pointers
1600
x9540
1036D
Vasya and Arrays
greedy
,
two pointers
1600
x9397
1036B
Diagonal Walking v.2
math
1600
x5725
1033C
Permutation Game
brute force
,
dp
,
games
1600
x5643
1031C
Cram Time
greedy
1600
x5359
1029C
Maximal Intersection
greedy
,
math
,
sortings
1600
x7619
1028C
Rectangles
geometry
,
implementation
,
sortings
1600
x4625
1027C
Minimum Value Rectangle
greedy
1600
x6926
1025C
Plasticine zebra
constructive algorithms
,
implementation
1600
x6164
1025B
Weakened Common Divisor
brute force
,
greedy
,
number theory
1600
x7962
1017C
The Phone Number
constructive algorithms
,
greedy
1600
x6042
1015D
Walking Between Houses
constructive algorithms
,
greedy
1600
x8305
1006E
Military Problem
dfs and similar
,
graphs
,
trees
1600
x10045
1003D
Coins and Queries
greedy
1600
x7866
1002D3
Oracle for majority function
*special problem
1600
x333
1002B3
Distinguish four 2-qubit states
*special problem
1600
x412
1002B2
Distinguish GHZ state and W state
*special problem
1600
x446
1001E
Distinguish Bell states
*special problem
1600
x558
993A
Two Squares
geometry
,
implementation
1600
x4171
992C
Nastya and a Wardrobe
math
1600
x4626
992B
Nastya Studies Informatics
math
,
number theory
1600
x6314
986A
Fair
graphs
,
greedy
,
number theory
,
shortest paths
1600
x7058
980B
Marlin
constructive algorithms
1600
x4713
979C
Kuro and Walking Route
dfs and similar
,
trees
1600
x6381
962D
Merge Equals
data structures
,
implementation
1600
x6953
958E1
Guard Duty (easy)
brute force
,
geometry
,
greedy
,
math
1600
x1552
954D
Fight Against Traffic
dfs and similar
,
graphs
,
shortest paths
1600
x6745
952C
Ravioli Sort
implementation
1600
x2918
949A
Zebras
greedy
1600
x5417
940D
Alena And The Heater
binary search
,
implementation
1600
x3653
939D
Love Rescue
dfs and similar
,
dsu
,
graphs
,
greedy
,
strings
1600
x7393
939C
Convenient For Everybody
binary search
,
two pointers
1600
x4647
935C
Fifa and Fafa
geometry
1600
x4773
932C
Permutation Cycle
brute force
,
constructive algorithms
1600
x4051
930B
Game with String
implementation
,
probabilities
,
strings
1600
x2696
926D
Choose Place
1600
x936
925A
Stairs and Elevators
binary search
1600
x3535
924B
Three-level Laser
binary search
,
greedy
,
two pointers
1600
x5338
923B
Producing Snow
binary search
,
data structures
1600
x7368
922C
Cave Painting
brute force
,
number theory
1600
x7166
916C
Jamie and Interesting Graph
constructive algorithms
,
graphs
,
shortest paths
1600
x5148
913C
Party Lemonade
bitmasks
,
dp
,
greedy
1600
x7977
910B
Door Frames
greedy
,
implementation
1600
x1716
906A
Shockers
implementation
,
strings
1600
x4148
898E
Squares and not squares
constructive algorithms
,
greedy
1600
x4637
898D
Alarm Clock
greedy
1600
x3995
888D
Almost Identity Permutations
combinatorics
,
dp
,
math
1600
x8585
878A
Short Program
bitmasks
,
constructive algorithms
1600
x5565
877C
Slava and tanks
constructive algorithms
1600
x5757
873C
Strange Game On Matrix
greedy
,
two pointers
1600
x3326
858D
Polycarp's phone book
data structures
,
implementation
,
sortings
1600
x3862
856A
Set Theory
brute force
,
constructive algorithms
1600
x1449
849B
Tell Your World
brute force
,
geometry
1600
x3679
848A
From Y to Y
constructive algorithms
1600
x5177
847H
Load Testing
greedy
1600
x2461
847B
Preparing for Merge Sort
binary search
,
data structures
1600
x5089
845B
Luba And The Ticket
brute force
,
greedy
,
implementation
1600
x5058
837B
Flag of Berland
brute force
,
implementation
1600
x3956
835C
Star sky
dp
,
implementation
1600
x8033
832B
Petya and Exam
implementation
,
strings
1600
x4391
830B
Cards Sorting
data structures
,
implementation
,
sortings
1600
x2852
825C
Multi-judge Solving
greedy
,
implementation
1600
x4573
825B
Five-In-a-Row
brute force
,
implementation
1600
x4294
822C
Hacker, pack your bags!
binary search
,
greedy
,
implementation
,
sortings
1600
x4611
818B
Permutation Game
implementation
1600
x3033
817C
Really Big Numbers
binary search
,
brute force
,
dp
,
math
1600
x7532
814C
An impassioned circulation of affection
brute force
,
dp
,
strings
,
two pointers
1600
x6728
812B
Sagheer, the Hausmeister
bitmasks
,
brute force
,
dp
1600
x5243
793B
Igor and his way to work
dfs and similar
,
graphs
,
implementation
,
shortest paths
1600
x4474
788A
Functions again
dp
,
two pointers
1600
x9179
785C
Anton and Fairy Tale
binary search
,
math
1600
x7423
780C
Andryusha and Colored Balloons
dfs and similar
,
graphs
,
greedy
,
trees
1600
x9188
780B
The Meeting Place Cannot Be Changed
binary search
1600
x9924
777C
Alyona and Spreadsheet
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
two pointers
1600
x6430
774K
Stepan and Vowels
*special problem
,
implementation
,
strings
1600
x1282
768B
Code For 1
constructive algorithms
,
dfs and similar
,
divide and conquer
1600
x6027
763A
Timofey and a tree
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
trees
1600
x10677
756B
Travel Card
binary search
,
dp
1600
x3789
753B
Interactive Bulls and Cows (Easy)
brute force
,
constructive algorithms
,
implementation
1600
x1215
750C
New Year and Rating
binary search
,
greedy
,
math
1600
x6577
746C
Tram
constructive algorithms
,
implementation
,
math
1600
x3744
741B
Arpa's weak amphitheater and Mehrdad's valuable Hoses
dfs and similar
,
dp
,
dsu
1600
x5305
741A
Arpa's loud Owf and Mehrdad's evil plan
dfs and similar
,
math
1600
x5451
735D
Taxes
math
,
number theory
1600
x13696
735C
Tennis Championship
combinatorics
,
constructive algorithms
,
greedy
,
math
1600
x7562
734C
Anton and Making Potions
binary search
,
dp
,
greedy
,
two pointers
1600
x5361
733D
Kostya the Sculptor
data structures
,
hashing
1600
x4189
731C
Socks
dfs and similar
,
dsu
,
graphs
,
greedy
1600
x7061
730G
Car Repair Shop
implementation
1600
x2190
727B
Bill Total Value
expression parsing
,
implementation
,
strings
1600
x2004
725C
Hidden Word
brute force
,
constructive algorithms
,
implementation
,
strings
1600
x2660
723D
Lakes in Berland
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
1600
x6999
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