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Codeforces Round 974 (Div. 3)
13:58:13
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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
386C
Diverse Substrings
dp
,
strings
,
two pointers
2000
x779
385E
Bear in the Field
math
,
matrices
2300
x586
385D
Bear and Floodlight
bitmasks
,
dp
,
geometry
2200
x810
385C
Bear and Prime Numbers
binary search
,
brute force
,
data structures
,
dp
,
implementation
,
math
,
number theory
1700
x9600
383E
Vowels
combinatorics
,
divide and conquer
,
dp
2700
x3033
383D
Antimatter
dp
2300
x2972
383C
Propagating tree
data structures
,
dfs and similar
,
trees
2000
x6407
383B
Volcanoes
binary search
,
implementation
,
sortings
,
two pointers
2500
x661
383A
Milking cows
data structures
,
greedy
1600
x5250
382E
Ksenia and Combinatorics
combinatorics
,
dp
2600
x378
382D
Ksenia and Pawns
dfs and similar
,
graphs
,
implementation
,
trees
2200
x669
382C
Arithmetic Progression
implementation
,
sortings
1700
x8270
382B
Number Busters
binary search
,
math
2000
x1402
380E
Sereja and Dividing
data structures
2600
x300
380D
Sereja and Cinema
combinatorics
,
math
2500
x462
380C
Sereja and Brackets
data structures
,
schedules
2000
x14806
380B
Sereja and Tree
graphs
,
implementation
2400
x532
380A
Sereja and Prefixes
binary search
,
brute force
1600
x2676
379G
New Year Cactus
dp
3100
x141
379F
New Year Tree
data structures
,
divide and conquer
,
trees
2400
x2257
379E
New Year Tree Decorations
geometry
,
schedules
,
sortings
2500
x338
379D
New Year Letter
bitmasks
,
brute force
,
dp
2000
x1552
377E
Cookie Clicker
dp
,
geometry
2800
x457
377D
Developing Game
data structures
2400
x1148
377C
Captains Mode
bitmasks
,
dp
,
games
2200
x1137
377B
Preparing for the Contest
binary search
,
data structures
,
greedy
,
sortings
1900
x2024
377A
Maze
dfs and similar
1600
x22279
375E
Red and Black Tree
dp
,
implementation
,
math
3000
x405
375D
Tree and Queries
data structures
,
dfs and similar
,
trees
2400
x6694
375C
Circling Round Treasures
bitmasks
,
shortest paths
2600
x506
375B
Maximum Submatrix 2
data structures
,
dp
,
implementation
,
sortings
1600
x5048
375A
Divisible by Seven
math
,
number theory
1600
x4813
374E
Inna and Babies
binary search
,
data structures
,
dsu
,
geometry
,
implementation
2600
x184
374D
Inna and Sequence
binary search
,
data structures
,
dp
,
trees
2000
x862
374C
Inna and Dima
dfs and similar
,
dp
,
graphs
,
implementation
1900
x2733
374A
Inna and Pink Pony
greedy
,
implementation
2000
x2911
373B
Making Sequences is Fun
binary search
,
implementation
,
math
1600
x2472
372E
Drawing Circles is Fun
combinatorics
,
geometry
3000
x171
372D
Choosing Subtree is Fun
binary search
,
data structures
,
dfs and similar
,
trees
,
two pointers
2600
x964
372C
Watching Fireworks is Fun
data structures
,
dp
,
math
2100
x4079
372B
Counting Rectangles is Fun
brute force
,
divide and conquer
,
dp
1900
x2600
372A
Counting Kangaroos is Fun
binary search
,
greedy
,
sortings
,
two pointers
1600
x12867
371E
Subway Innovation
greedy
,
math
,
two pointers
2000
x1288
371D
Vessels
data structures
,
dsu
,
implementation
,
trees
1800
x5613
371C
Hamburgers
binary search
,
brute force
1600
x26008
370E
Summer Reading
dp
,
greedy
2500
x288
370D
Broken Monitor
brute force
,
constructive algorithms
,
greedy
,
implementation
2100
x628
370C
Mittens
constructive algorithms
,
greedy
,
sortings
1800
x1557
369E
Valera and Queries
binary search
,
data structures
2200
x2131
369D
Valera and Fools
dfs and similar
,
dp
,
graphs
,
shortest paths
2200
x1139
369C
Valera and Elections
dfs and similar
,
graphs
,
trees
1600
x9921
367E
Sereja and Intervals
combinatorics
,
dp
2700
x1115
367D
Sereja and Sets
bitmasks
,
dfs and similar
2400
x653
367C
Sereja and the Arrangement of Numbers
graphs
,
greedy
,
sortings
2000
x1781
367B
Sereja ans Anagrams
binary search
,
data structures
1900
x2461
366E
Dima and Magic Guitar
brute force
,
implementation
,
math
2200
x766
366D
Dima and Trap Graph
binary search
,
data structures
,
dfs and similar
,
dsu
,
shortest paths
,
two pointers
2000
x1555
366C
Dima and Salad
dp
1900
x4770
364E
Empty Rectangles
divide and conquer
,
two pointers
3000
x576
364D
Ghd
brute force
,
math
,
probabilities
2900
x2079
364C
Beautiful Set
brute force
,
number theory
2300
x596
364B
Free Market
dp
,
greedy
2200
x1176
364A
Matrix
combinatorics
,
data structures
,
implementation
1600
x4663
363E
Two Circles
brute force
,
data structures
,
implementation
2500
x202
363D
Renting Bikes
binary search
,
greedy
1800
x3849
362E
Petya and Pipes
flows
,
graphs
,
shortest paths
2300
x805
362D
Fools and Foolproof Roads
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
2100
x926
362C
Insertion Sort
data structures
,
dp
,
implementation
,
math
1900
x1743
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
x5058
359C
Prime Number
math
,
number theory
1900
x3026
358E
Dima and Kicks
brute force
,
dsu
,
graphs
,
implementation
2300
x394
358D
Dima and Hares
dp
,
greedy
1800
x4008
358C
Dima and Containers
constructive algorithms
,
greedy
,
implementation
2000
x2004
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
x1262
356B
Xenia and Hamming
implementation
,
math
1900
x1922
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
x3048
354B
Game with Strings
bitmasks
,
dp
,
games
2400
x457
353E
Antichain
dp
,
graph matchings
,
greedy
2200
x583
353D
Queue
constructive algorithms
,
dp
2000
x2855
353C
Find Maximum
implementation
,
math
,
number theory
1600
x4818
353B
Two Heaps
combinatorics
,
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
1900
x2277
351E
Jeff and Permutation
greedy
2200
x1572
351D
Jeff and Removing Periods
data structures
2700
x1047
351C
Jeff and Brackets
dp
,
matrices
2500
x552
351B
Jeff and Furik
combinatorics
,
dp
,
probabilities
1900
x2371
351A
Jeff and Rounding
dp
,
greedy
,
implementation
,
math
1800
x2916
350E
Wrong Floyd
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
2200
x768
350D
Looking for Owls
binary search
,
data structures
,
geometry
,
hashing
,
sortings
2400
x263
350C
Bombs
greedy
,
implementation
,
sortings
1600
x6534
349B
Color the Fence
data structures
,
dp
,
greedy
,
implementation
1700
x13918
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