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Before contest
Codeforces Round 973 (Div. 2)
08:05:58
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Difficulty:
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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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Problems
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Status
Standings
Custom test
Problems
#
Name
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
x9598
385B
Bear and Strings
brute force
,
greedy
,
implementation
,
math
,
strings
1200
x9862
385A
Bear and Raspberry
brute force
,
greedy
,
implementation
1000
x16445
384B
Multitasking
greedy
,
implementation
,
sortings
,
two pointers
1500
x3521
384A
Coder
implementation
800
x16105
383E
Vowels
combinatorics
,
divide and conquer
,
dp
2700
x3032
383D
Antimatter
dp
2300
x2972
383C
Propagating tree
data structures
,
dfs and similar
,
trees
2000
x6403
383B
Volcanoes
binary search
,
implementation
,
sortings
,
two pointers
2500
x661
383A
Milking cows
data structures
,
greedy
1600
x5249
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
x8269
382B
Number Busters
binary search
,
math
2000
x1401
382A
Ksenia and Pan Scales
greedy
,
implementation
1100
x12310
381B
Sereja and Stairs
greedy
,
implementation
,
sortings
1100
x6735
381A
Sereja and Dima
greedy
,
implementation
,
two pointers
800
x64923
380E
Sereja and Dividing
data structures
2600
x300
380D
Sereja and Cinema
combinatorics
,
math
2500
x462
380C
Sereja and Brackets
data structures
,
schedules
2000
x14801
380B
Sereja and Tree
graphs
,
implementation
2400
x532
380A
Sereja and Prefixes
binary search
,
brute force
1600
x2675
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
x1551
379C
New Year Ratings Change
greedy
,
sortings
1400
x6540
379B
New Year Present
constructive algorithms
,
implementation
1200
x7247
379A
New Year Candles
implementation
1000
x45994
378B
Semifinals
implementation
,
sortings
1300
x5209
378A
Playing with Dice
brute force
800
x23751
377E
Cookie Clicker
dp
,
geometry
2800
x457
377D
Developing Game
data structures
2400
x1148
377C
Captains Mode
bitmasks
,
dp
,
games
2200
x1136
377B
Preparing for the Contest
binary search
,
data structures
,
greedy
,
sortings
1900
x2018
377A
Maze
dfs and similar
1600
x22272
376B
I.O.U.
implementation
1300
x6351
376A
Lever
implementation
,
math
900
x9310
375E
Red and Black Tree
dp
,
implementation
,
math
3000
x405
375D
Tree and Queries
data structures
,
dfs and similar
,
trees
2400
x6693
375C
Circling Round Treasures
bitmasks
,
shortest paths
2600
x506
375B
Maximum Submatrix 2
data structures
,
dp
,
implementation
,
sortings
1600
x5047
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
374B
Inna and Nine
combinatorics
,
greedy
1500
x3283
374A
Inna and Pink Pony
greedy
,
implementation
2000
x2910
373B
Making Sequences is Fun
binary search
,
implementation
,
math
1600
x2472
373A
Collecting Beats is Fun
implementation
900
x10661
372E
Drawing Circles is Fun
combinatorics
,
geometry
3000
x170
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
x4075
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
x12859
371E
Subway Innovation
greedy
,
math
,
two pointers
2000
x1288
371D
Vessels
data structures
,
dsu
,
implementation
,
trees
1800
x5612
371C
Hamburgers
binary search
,
brute force
1600
x25996
371B
Fox Dividing Cheese
math
,
number theory
1300
x11294
371A
K-Periodic Array
greedy
,
implementation
,
math
1000
x6034
370E
Summer Reading
dp
,
greedy
2500
x287
370D
Broken Monitor
brute force
,
constructive algorithms
,
greedy
,
implementation
2100
x627
370C
Mittens
constructive algorithms
,
greedy
,
sortings
1800
x1556
370B
Berland Bingo
implementation
1300
x2510
370A
Rook, Bishop and King
graphs
,
math
,
shortest paths
1100
x10143
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
x9918
369B
Valera and Contest
constructive algorithms
,
implementation
,
math
1400
x6458
369A
Valera and Plates
greedy
,
implementation
900
x11015
368B
Sereja and Suffixes
data structures
,
dp
1100
x41298
368A
Sereja and Coat Rack
implementation
1000
x7488
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
x1780
367B
Sereja ans Anagrams
binary search
,
data structures
1900
x2460
367A
Sereja and Algorithm
data structures
,
implementation
1500
x4312
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
366B
Dima and To-do List
brute force
,
implementation
1200
x6811
366A
Dima and Guards
implementation
1100
x4512
365B
The Fibonacci Segment
implementation
1100
x14430
365A
Good Number
implementation
1100
x18462
364E
Empty Rectangles
divide and conquer
,
two pointers
3000
x576
364D
Ghd
brute force
,
math
,
probabilities
2900
x2078
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
x3848
363C
Fixing Typos
greedy
,
implementation
1400
x13289
363B
Fence
brute force
,
dp
1100
x52521
363A
Soroban
implementation
800
x10716
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
362B
Petya and Staircases
implementation
,
sortings
1100
x13782
362A
Two Semiknights Meet
greedy
,
math
1500
x2657
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