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Problems
#
Name
360A
Levko and Array Recovery
greedy
,
implementation
1700
x2024
359E
Neatness
constructive algorithms
,
dfs and similar
2400
x461
359D
Pair of Numbers
binary search
,
brute force
,
data structures
,
math
,
two pointers
2000
x4879
359C
Prime Number
math
,
number theory
1900
x2946
359B
Permutation
constructive algorithms
,
dp
,
math
1400
x7761
359A
Table
constructive algorithms
,
greedy
,
implementation
1000
x8407
358E
Dima and Kicks
brute force
,
dsu
,
graphs
,
implementation
2300
x390
358D
Dima and Hares
dp
,
greedy
1800
x3910
358C
Dima and Containers
constructive algorithms
,
greedy
,
implementation
2000
x1957
358B
Dima and Text Messages
brute force
,
strings
1500
x3688
358A
Dima and Continuous Line
brute force
,
implementation
1400
x7627
357B
Flag Day
constructive algorithms
,
implementation
1400
x8066
357A
Group of Students
brute force
,
greedy
,
implementation
1000
x6730
356E
Xenia and String Problem
dp
,
hashing
,
implementation
,
string suffix structures
,
strings
3000
x403
356D
Bags and Coins
bitmasks
,
constructive algorithms
,
dp
,
greedy
2700
x941
356C
Compartments
combinatorics
,
constructive algorithms
,
greedy
,
implementation
2100
x1231
356B
Xenia and Hamming
implementation
,
math
1900
x1889
356A
Knight Tournament
data structures
,
dsu
1500
x12926
355B
Vasya and Public Transport
greedy
,
implementation
1100
x4440
355A
Vasya and Digital Root
constructive algorithms
,
implementation
1100
x9288
354E
Lucky Number Representation
constructive algorithms
,
dfs and similar
,
dp
2200
x873
354D
Transferring Pyramid
dp
2900
x443
354C
Vasya and Beautiful Arrays
brute force
,
dp
,
number theory
2100
x2995
354B
Game with Strings
bitmasks
,
dp
,
games
2400
x449
354A
Vasya and Robot
brute force
,
greedy
,
math
1500
x5405
353E
Antichain
dp
,
graph matchings
,
greedy
2200
x571
353D
Queue
constructive algorithms
,
dp
2000
x2750
353C
Find Maximum
implementation
,
math
,
number theory
1600
x4757
353B
Two Heaps
combinatorics
,
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
1900
x2200
353A
Domino
implementation
,
math
1200
x17950
352B
Jeff and Periods
implementation
,
sortings
1300
x15930
352A
Jeff and Digits
brute force
,
implementation
,
math
1000
x24818
351E
Jeff and Permutation
greedy
2200
x1514
351D
Jeff and Removing Periods
data structures
2700
x1017
351C
Jeff and Brackets
dp
,
matrices
2500
x540
351B
Jeff and Furik
combinatorics
,
dp
,
probabilities
1900
x2299
351A
Jeff and Rounding
dp
,
greedy
,
implementation
,
math
1800
x2733
350E
Wrong Floyd
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
2200
x751
350D
Looking for Owls
binary search
,
data structures
,
geometry
,
hashing
,
sortings
2400
x257
350C
Bombs
greedy
,
implementation
,
sortings
1600
x6476
350B
Resort
graphs
1500
x3091
350A
TL
brute force
,
greedy
,
implementation
1200
x16049
349B
Color the Fence
data structures
,
dp
,
greedy
,
implementation
1700
x13558
349A
Cinema Line
greedy
,
implementation
1100
x28941
348E
Pilgrims
dfs and similar
,
dp
,
trees
2800
x427
348D
Turtles
dp
,
matrices
2500
x1623
348C
Subset Sums
brute force
,
data structures
2500
x2109
348B
Apple Tree
dfs and similar
,
number theory
,
trees
2100
x2051
348A
Mafia
binary search
,
math
,
sortings
1600
x12706
347B
Fixed Points
brute force
,
implementation
,
math
1100
x9177
347A
Difference Row
constructive algorithms
,
implementation
,
sortings
1300
x8810
346E
Doodle Jump
math
,
number theory
3000
x256
346D
Robot Control
dp
,
graphs
,
shortest paths
2600
x705
346C
Number Transformation II
greedy
,
math
2200
x1421
346B
Lucky Common Subsequence
dp
,
strings
2000
x3363
346A
Alice and Bob
games
,
math
,
number theory
1600
x8490
345G
Suffix Subgroup
*special problem
,
strings
2200
x53
345F
Superstitions Inspection
*special problem
2700
x45
345E
Black Cat Rush
*special problem
2700
x45
345D
Chain Letter
*special problem
,
dfs and similar
,
graphs
2200
x77
345C
Counting Fridays
*special problem
2000
x124
345B
Triskaidekaphobia
*special problem
2100
x123
345A
Expecting Trouble
*special problem
,
probabilities
1500
x478
344B
Simple Molecules
brute force
,
graphs
,
math
1200
x8721
344A
Magnets
implementation
800
x113336
343E
Pumping Stations
brute force
,
dfs and similar
,
divide and conquer
,
flows
,
graphs
,
greedy
,
trees
2900
x691
343D
Water Tree
data structures
,
dfs and similar
,
graphs
,
trees
2100
x5526
343C
Read Time
binary search
,
greedy
,
two pointers
1900
x2910
343B
Alternating Current
data structures
,
greedy
,
implementation
1600
x13168
343A
Rational Resistance
math
,
number theory
1600
x8558
342E
Xenia and Tree
data structures
,
divide and conquer
,
trees
2400
x7728
342D
Xenia and Dominoes
bitmasks
,
dfs and similar
,
dp
2100
x489
342C
Cupboard and Balloons
geometry
1900
x1819
342B
Xenia and Spies
brute force
,
greedy
,
implementation
1500
x3988
342A
Xenia and Divisors
greedy
,
implementation
1200
x12192
341E
Candies Game
constructive algorithms
,
greedy
3000
x437
341D
Iahub and Xors
data structures
2500
x1161
340E
Iahub and Permutations
combinatorics
,
math
2000
x2309
340D
Bubble Sort Graph
binary search
,
data structures
,
dp
1500
x7063
340C
Tourist Problem
combinatorics
,
implementation
,
math
1600
x4130
340B
Maximal Area Quadrilateral
brute force
,
geometry
2100
x2029
340A
The Wall
math
1200
x7452
339E
Three Swaps
constructive algorithms
,
dfs and similar
,
greedy
2700
x539
339D
Xenia and Bit Operations
data structures
,
trees
1700
x24004
339C
Xenia and Weights
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
1700
x8171
339B
Xenia and Ringroad
implementation
1000
x67116
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x201253
338E
Optimize!
data structures
2600
x954
338D
GCD Table
chinese remainder theorem
,
math
,
number theory
2900
x1097
337E
Divisor Tree
brute force
,
number theory
,
trees
2200
x1008
337D
Book of Evil
dfs and similar
,
divide and conquer
,
dp
,
trees
2000
x5877
337C
Quiz
binary search
,
greedy
,
math
,
matrices
,
number theory
1600
x4809
337B
Routine Problem
greedy
,
math
,
number theory
1400
x9138
337A
Puzzles
greedy
900
x76283
336E
Vasily the Bear and Painting Square
bitmasks
,
combinatorics
,
dp
,
implementation
2700
x110
336D
Vasily the Bear and Beautiful Strings
combinatorics
,
math
,
number theory
2100
x935
336C
Vasily the Bear and Sequence
brute force
,
greedy
,
implementation
,
number theory
1800
x2379
336B
Vasily the Bear and Fly
math
1900
x1179
336A
Vasily the Bear and Triangle
implementation
,
math
1000
x9908
335F
Buy One, Get One Free
dp
,
greedy
3000
x481
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