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Codeforces Round 973 (Div. 2)
06:54:52
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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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Status
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Custom test
Problems
#
Name
361B
Levko and Permutation
constructive algorithms
,
math
,
number theory
1200
x8024
361A
Levko and Table
constructive algorithms
,
implementation
800
x16619
360E
Levko and Game
graphs
,
greedy
,
shortest paths
2800
x699
360D
Levko and Sets
number theory
2600
x403
360C
Levko and Strings
combinatorics
,
dp
2500
x1106
360B
Levko and Array
binary search
,
dp
2000
x2900
360A
Levko and Array Recovery
greedy
,
implementation
1700
x2054
359E
Neatness
constructive algorithms
,
dfs and similar
2400
x466
359D
Pair of Numbers
binary search
,
brute force
,
data structures
,
math
,
two pointers
2000
x5056
359C
Prime Number
math
,
number theory
1900
x3024
359B
Permutation
constructive algorithms
,
dp
,
math
1400
x7934
359A
Table
constructive algorithms
,
greedy
,
implementation
1000
x8526
358E
Dima and Kicks
brute force
,
dsu
,
graphs
,
implementation
2300
x394
358D
Dima and Hares
dp
,
greedy
1800
x4006
358C
Dima and Containers
constructive algorithms
,
greedy
,
implementation
2000
x2003
358B
Dima and Text Messages
brute force
,
strings
1500
x3713
358A
Dima and Continuous Line
brute force
,
implementation
1400
x7728
357B
Flag Day
constructive algorithms
,
implementation
1400
x8165
357A
Group of Students
brute force
,
greedy
,
implementation
1000
x6818
356E
Xenia and String Problem
dp
,
hashing
,
implementation
,
string suffix structures
,
strings
3000
x408
356D
Bags and Coins
bitmasks
,
constructive algorithms
,
dp
,
greedy
2700
x953
356C
Compartments
combinatorics
,
constructive algorithms
,
greedy
,
implementation
2100
x1261
356B
Xenia and Hamming
implementation
,
math
1900
x1922
356A
Knight Tournament
data structures
,
dsu
1500
x13470
355B
Vasya and Public Transport
greedy
,
implementation
1100
x4492
355A
Vasya and Digital Root
constructive algorithms
,
implementation
1100
x9397
354E
Lucky Number Representation
constructive algorithms
,
dfs and similar
,
dp
2200
x877
354D
Transferring Pyramid
dp
2900
x462
354C
Vasya and Beautiful Arrays
brute force
,
dp
,
number theory
2100
x3047
354B
Game with Strings
bitmasks
,
dp
,
games
2400
x457
354A
Vasya and Robot
brute force
,
greedy
,
math
1500
x5467
353E
Antichain
dp
,
graph matchings
,
greedy
2200
x583
353D
Queue
constructive algorithms
,
dp
2000
x2855
353C
Find Maximum
implementation
,
math
,
number theory
1600
x4816
353B
Two Heaps
combinatorics
,
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
1900
x2275
353A
Domino
implementation
,
math
1200
x18441
352B
Jeff and Periods
implementation
,
sortings
1300
x16364
352A
Jeff and Digits
brute force
,
implementation
,
math
1000
x25556
351E
Jeff and Permutation
greedy
2200
x1571
351D
Jeff and Removing Periods
data structures
2700
x1047
351C
Jeff and Brackets
dp
,
matrices
2500
x551
351B
Jeff and Furik
combinatorics
,
dp
,
probabilities
1900
x2370
351A
Jeff and Rounding
dp
,
greedy
,
implementation
,
math
1800
x2915
350E
Wrong Floyd
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
2200
x767
350D
Looking for Owls
binary search
,
data structures
,
geometry
,
hashing
,
sortings
2400
x263
350C
Bombs
greedy
,
implementation
,
sortings
1600
x6534
350B
Resort
graphs
1500
x3176
350A
TL
brute force
,
greedy
,
implementation
1200
x16334
349B
Color the Fence
data structures
,
dp
,
greedy
,
implementation
1700
x13916
349A
Cinema Line
greedy
,
implementation
1100
x29767
348E
Pilgrims
dfs and similar
,
dp
,
trees
2800
x441
348D
Turtles
dp
,
matrices
2500
x1706
348C
Subset Sums
brute force
,
data structures
2500
x2183
348B
Apple Tree
dfs and similar
,
number theory
,
trees
2100
x2076
348A
Mafia
binary search
,
math
,
sortings
1600
x12976
347B
Fixed Points
brute force
,
implementation
,
math
1100
x9278
347A
Difference Row
constructive algorithms
,
implementation
,
sortings
1300
x8939
346E
Doodle Jump
math
,
number theory
3000
x263
346D
Robot Control
dp
,
graphs
,
shortest paths
2600
x743
346C
Number Transformation II
greedy
,
math
2200
x1432
346B
Lucky Common Subsequence
dp
,
strings
2000
x3493
346A
Alice and Bob
games
,
math
,
number theory
1600
x8659
345G
Suffix Subgroup
*special problem
,
strings
2200
x55
345F
Superstitions Inspection
*special problem
2700
x47
345E
Black Cat Rush
*special problem
2700
x47
345D
Chain Letter
*special problem
,
dfs and similar
,
graphs
2200
x79
345C
Counting Fridays
*special problem
2000
x126
345B
Triskaidekaphobia
*special problem
2100
x125
345A
Expecting Trouble
*special problem
,
probabilities
1500
x484
344B
Simple Molecules
brute force
,
graphs
,
math
1200
x8828
344A
Magnets
implementation
800
x119024
343E
Pumping Stations
brute force
,
dfs and similar
,
divide and conquer
,
flows
,
graphs
,
greedy
,
trees
2900
x720
343D
Water Tree
data structures
,
dfs and similar
,
graphs
,
trees
2100
x5745
343C
Read Time
binary search
,
greedy
,
two pointers
1900
x3003
343B
Alternating Current
data structures
,
greedy
,
implementation
1600
x13722
343A
Rational Resistance
math
,
number theory
1600
x8712
342E
Xenia and Tree
data structures
,
divide and conquer
,
trees
2400
x8309
342D
Xenia and Dominoes
bitmasks
,
dfs and similar
,
dp
2100
x496
342C
Cupboard and Balloons
geometry
1900
x1845
342B
Xenia and Spies
brute force
,
greedy
,
implementation
1500
x4016
342A
Xenia and Divisors
greedy
,
implementation
1200
x12490
341E
Candies Game
constructive algorithms
,
greedy
3000
x446
341D
Iahub and Xors
data structures
2500
x1201
340E
Iahub and Permutations
combinatorics
,
math
2000
x2458
340D
Bubble Sort Graph
binary search
,
data structures
,
dp
1500
x7154
340C
Tourist Problem
combinatorics
,
implementation
,
math
1600
x4214
340B
Maximal Area Quadrilateral
brute force
,
geometry
2100
x2069
340A
The Wall
math
1200
x7563
339E
Three Swaps
constructive algorithms
,
dfs and similar
,
greedy
2700
x547
339D
Xenia and Bit Operations
data structures
,
trees
1700
x25387
339C
Xenia and Weights
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
1700
x8293
339B
Xenia and Ringroad
implementation
1000
x69264
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x211215
338E
Optimize!
data structures
2600
x982
338D
GCD Table
chinese remainder theorem
,
math
,
number theory
2900
x1144
337E
Divisor Tree
brute force
,
number theory
,
trees
2200
x1018
337D
Book of Evil
dfs and similar
,
divide and conquer
,
dp
,
trees
2000
x6067
337C
Quiz
binary search
,
greedy
,
math
,
matrices
,
number theory
1600
x4878
337B
Routine Problem
greedy
,
math
,
number theory
1400
x9321
337A
Puzzles
greedy
900
x78921
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