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Codeforces Round 1133 (Div. 1, Div. 2) is coming soon! Register
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Codeforces Round 1133 (Div. 1)
19:52:10
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Codeforces Round 1133 (Div. 2)
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constructive algorithms
combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
communication
constructive algorithms
data structures
dfs and similar
divide and conquer
dp
dsu
expression parsing
fft
flows
games
geometry
graph matchings
graphs
greedy
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implementation
interactive
math
matrices
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number theory
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strings
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Problems
#
Name
1078E
Negative Time Summation
constructive algorithms
3400
x110
1070M
Algoland and Berland
constructive algorithms
,
divide and conquer
,
geometry
3000
x94
1070L
Odd Federalization
constructive algorithms
2600
x441
1068C
Colored Rooks
constructive algorithms
,
graphs
1700
x3390
1067C
Knights
constructive algorithms
2600
x731
1065B
Vasya and Isolated Vertices
constructive algorithms
,
graphs
1300
x11794
1063E
Lasers and Mirrors
constructive algorithms
,
math
3000
x481
1063C
Dwarves, Hats and Extrasensory Abilities
binary search
,
constructive algorithms
,
geometry
,
interactive
1900
x3408
1063A
Oh Those Palindromes
constructive algorithms
,
strings
1300
x11296
1060H
Sophisticated Device
constructive algorithms
3300
x388
1059C
Sequence Transformation
constructive algorithms
,
math
1600
x7638
1056D
Decorate Apple Tree
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
sortings
,
trees
1600
x6932
1054G
New Road Network
constructive algorithms
,
greedy
,
math
3300
x977
1054E
Chips Puzzle
constructive algorithms
,
implementation
,
math
2400
x520
1054C
Candies Distribution
constructive algorithms
,
implementation
1500
x4540
1053E
Euler tour
constructive algorithms
,
trees
3500
x274
1045E
Ancient civilizations
constructive algorithms
,
geometry
3200
x262
1043E
Train Hard, Win Easy
constructive algorithms
,
greedy
,
math
,
sortings
1900
x3501
1043C
Smallest Word
constructive algorithms
,
greedy
,
implementation
1500
x7300
1042C
Array Product
constructive algorithms
,
greedy
,
math
1700
x5028
1041E
Tree Reconstruction
constructive algorithms
,
data structures
,
graphs
,
greedy
1900
x3985
1039A
Timetable
constructive algorithms
,
data structures
,
greedy
,
math
2300
x902
1038B
Non-Coprime Partition
constructive algorithms
,
math
1100
x15051
1037A
Packets
constructive algorithms
,
greedy
,
math
1300
x11929
1034B
Little C Loves 3 II
brute force
,
constructive algorithms
,
flows
,
graph matchings
2200
x2364
1033E
Hidden Bipartite Graph
binary search
,
constructive algorithms
,
dfs and similar
,
graphs
,
interactive
2800
x893
1032C
Playing Piano
constructive algorithms
,
dp
1700
x4424
1031E
Triple Flips
constructive algorithms
2600
x669
1028E
Restore Array
constructive algorithms
2400
x1239
1028B
Unnatural Conditions
constructive algorithms
,
math
1200
x10554
1025G
Company Acquisitions
constructive algorithms
,
math
3200
x1064
1025E
Colored Cubes
constructive algorithms
,
implementation
,
matrices
2700
x634
1025C
Plasticine zebra
constructive algorithms
,
implementation
1600
x6595
1023E
Down or Right
constructive algorithms
,
interactive
,
matrices
2100
x2290
1023D
Array Restoration
constructive algorithms
,
data structures
1700
x4368
1019C
Sergey's problem
constructive algorithms
,
graphs
3000
x1638
1017C
The Phone Number
constructive algorithms
,
greedy
1600
x6561
1016D
Vasya And The Matrix
constructive algorithms
,
flows
,
math
1800
x5041
1015D
Walking Between Houses
constructive algorithms
,
greedy
1600
x9141
1012D
AB-Strings
constructive algorithms
,
strings
2800
x486
1012B
Chemical table
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
matrices
1900
x4488
1009D
Relatively Prime Graph
brute force
,
constructive algorithms
,
graphs
,
greedy
,
math
1700
x6780
1004D
Sonya and Matrix
brute force
,
constructive algorithms
,
implementation
2300
x1539
1004C
Sonya and Robots
constructive algorithms
,
implementation
1400
x7950
1004B
Sonya and Exhibition
constructive algorithms
,
greedy
,
implementation
,
math
1300
x10136
1003E
Tree Constructing
constructive algorithms
,
graphs
2100
x3237
1003B
Binary String Constructing
constructive algorithms
1300
x12435
998A
Balloons
constructive algorithms
,
implementation
1000
x10282
995A
Tesla
constructive algorithms
,
implementation
2100
x1866
990D
Graph And Its Complement
constructive algorithms
,
graphs
,
implementation
1700
x4184
989C
A Mist of Florescence
constructive algorithms
,
graphs
1800
x4123
989B
A Tide of Riverscape
constructive algorithms
,
strings
1200
x7337
985D
Sand Fortress
binary search
,
constructive algorithms
,
math
2100
x2901
982A
Row
brute force
,
constructive algorithms
1200
x9902
980B
Marlin
constructive algorithms
1600
x4987
976D
Degree Set
constructive algorithms
,
graphs
,
implementation
2500
x809
963B
Destruction of a Tree
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
2000
x3090
962E
Byteland, Berland and Disputed Cities
constructive algorithms
,
greedy
2200
x1175
962B
Students in Railway Carriage
constructive algorithms
,
greedy
,
implementation
1300
x8208
960C
Subsequence Counting
bitmasks
,
constructive algorithms
,
greedy
,
implementation
1700
x4207
959D
Mahmoud and Ehab and another array construction task
constructive algorithms
,
greedy
,
math
,
number theory
1900
x3341
959C
Mahmoud and Ehab and the wrong algorithm
constructive algorithms
,
trees
1500
x6365
952G
Puzzling Language
*special problem
,
*special problem
,
*special problem
,
constructive algorithms
2200
x265
949B
A Leapfrog in the Array
constructive algorithms
,
math
1700
x3867
940C
Phone Numbers
constructive algorithms
,
implementation
,
strings
1500
x6816
938C
Constructing Tests
binary search
,
brute force
,
constructive algorithms
1700
x3502
936C
Lock Puzzle
constructive algorithms
,
implementation
,
strings
2300
x1296
934B
A Prosperous Lot
constructive algorithms
,
implementation
1200
x9303
933E
A Preponderant Reunion
constructive algorithms
,
dp
3200
x340
932C
Permutation Cycle
brute force
,
constructive algorithms
1600
x4281
932A
Palindromic Supersequence
constructive algorithms
800
x11050
931B
World Cup
constructive algorithms
,
implementation
1200
x7579
926E
Merge Equal Elements
constructive algorithms
,
data structures
1900
x1111
925D
Aztec Catacombs
constructive algorithms
2600
x582
925C
Big Secret
constructive algorithms
,
math
2200
x1462
923F
Public Service
constructive algorithms
,
graphs
,
trees
3200
x158
923D
Picking Strings
constructive algorithms
,
implementation
,
strings
2500
x1476
922F
Divisibility
constructive algorithms
,
dp
,
greedy
,
number theory
2400
x784
916C
Jamie and Interesting Graph
constructive algorithms
,
graphs
,
shortest paths
1600
x5644
912B
New Year's Eve
bitmasks
,
constructive algorithms
,
number theory
1300
x14505
911F
Tree Destruction
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2400
x2450
911E
Stack Sorting
constructive algorithms
,
data structures
,
greedy
,
implementation
2000
x3023
911C
Three Garlands
brute force
,
constructive algorithms
1400
x7386
910C
Minimum Sum
constructive algorithms
,
greedy
,
math
1700
x2203
909F
AND-permutations
constructive algorithms
2500
x702
909B
Segments
constructive algorithms
,
math
1300
x6860
906B
Seating of Students
brute force
,
constructive algorithms
,
math
2200
x1375
901D
Weighting a Tree
constructive algorithms
,
dfs and similar
,
graphs
2700
x699
901B
GCD of Polynomials
constructive algorithms
,
math
2200
x1656
901A
Hashing Trees
constructive algorithms
,
trees
1500
x5434
899D
Shovel Sale
constructive algorithms
,
math
1800
x3293
899C
Dividing the numbers
constructive algorithms
,
graphs
,
math
1300
x9148
899A
Splitting in Teams
constructive algorithms
,
greedy
,
math
800
x11233
898E
Squares and not squares
constructive algorithms
,
greedy
1600
x4926
896B
Ithea Plays With Chtholly
binary search
,
constructive algorithms
,
games
,
greedy
,
interactive
2000
x2373
894C
Marco and GCD Sequence
constructive algorithms
,
math
1900
x4688
894B
Ralph And His Magic Field
combinatorics
,
constructive algorithms
,
math
,
number theory
1800
x4759
891B
Gluttony
constructive algorithms
,
greedy
2000
x3305
888G
Xor-MST
bitmasks
,
constructive algorithms
,
data structures
2300
x6429
886D
Restoration of string
constructive algorithms
,
graphs
,
implementation
2000
x2082
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