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Before contest
Codeforces Round #956 (Div. 2) and ByteRace 2024
43:15:28
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Difficulty:
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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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Custom test
Problems
#
Name
245G
Suggested Friends
brute force
,
graphs
2200
x425
245F
Log Stream Analysis
binary search
,
brute force
,
implementation
,
strings
2000
x871
245E
Mishap in Club
greedy
,
implementation
1400
x3247
245D
Restoring Table
constructive algorithms
,
greedy
1500
x2258
245C
Game with Coins
greedy
1700
x1525
244B
Undoubtedly Lucky Numbers
bitmasks
,
brute force
,
dfs and similar
1600
x4412
243E
Matrix
data structures
3000
x172
243D
Cubes
data structures
,
dp
,
geometry
,
two pointers
2700
x211
243C
Colorado Potato Beetle
dfs and similar
,
implementation
2200
x524
243B
Hydra
graphs
,
sortings
2000
x1188
243A
The Brand New Function
bitmasks
1600
x3840
242E
XOR on Segment
bitmasks
,
data structures
2000
x8673
242D
Dispute
dfs and similar
,
graphs
,
greedy
2100
x1852
242C
King's Path
dfs and similar
,
graphs
,
hashing
,
shortest paths
1800
x8247
241G
Challenging Balloons
constructive algorithms
1900
x541
241F
Race
brute force
,
implementation
2300
x261
241E
Flights
graphs
,
shortest paths
2600
x1013
241D
Numbers
2900
x348
241C
Mirror Box
geometry
,
implementation
2000
x509
241B
Friends
binary search
,
bitmasks
,
data structures
,
math
2700
x759
240F
TorCoder
data structures
2600
x1822
240E
Road Repairs
dfs and similar
,
graphs
,
greedy
2800
x354
239B
Easy Tape Programming
brute force
,
implementation
1500
x1365
238E
Meeting Her
dp
,
graphs
,
shortest paths
2600
x348
238D
Tape Programming
data structures
,
implementation
2900
x246
238C
World Eater Brothers
dfs and similar
,
dp
,
greedy
,
trees
2100
x1092
238B
Boring Partition
constructive algorithms
1800
x1279
237E
Build String
flows
,
graphs
2000
x1612
237D
T-decomposition
dfs and similar
,
graphs
,
greedy
,
trees
2000
x549
237C
Primes on Interval
binary search
,
number theory
,
two pointers
1600
x5624
237B
Young Table
implementation
,
sortings
1500
x2223
235E
Number Challenge
combinatorics
,
dp
,
implementation
,
math
,
number theory
2600
x761
235D
Graph Game
graphs
3000
x480
235C
Cyclical Quest
data structures
,
string suffix structures
,
strings
2700
x2045
235B
Let's Play Osu!
dp
,
math
,
probabilities
2000
x3393
235A
LCM Challenge
number theory
1600
x17214
234H
Merging Two Decks
constructive algorithms
,
greedy
2000
x558
234G
Practice
constructive algorithms
,
divide and conquer
,
implementation
1600
x1463
234F
Fence
dp
1800
x1720
234E
Champions' League
implementation
1600
x992
234D
Cinema
implementation
1600
x1518
233B
Non-square Equation
binary search
,
brute force
,
math
1400
x7362
232E
Quick Tortoise
bitmasks
,
divide and conquer
,
dp
3000
x682
232D
Fence
binary search
,
data structures
,
string suffix structures
2900
x444
232C
Doe Graphs
constructive algorithms
,
divide and conquer
,
dp
,
graphs
,
shortest paths
2600
x283
232B
Table
bitmasks
,
combinatorics
,
dp
,
math
1900
x1394
232A
Cycles
binary search
,
constructive algorithms
,
graphs
,
greedy
1600
x2475
231E
Cactus
data structures
,
dfs and similar
,
dp
,
graphs
,
trees
2100
x1628
231D
Magic Box
brute force
,
geometry
1600
x4049
231C
To Add or Not to Add
binary search
,
sortings
,
two pointers
1600
x8393
231B
Magic, Wizardry and Wonders
constructive algorithms
,
greedy
1500
x3573
229E
Gifts
combinatorics
,
dp
,
math
,
probabilities
2600
x455
229D
Towers
dp
,
greedy
,
two pointers
2100
x2136
229C
Triangles
combinatorics
,
graphs
,
math
1900
x1602
229B
Planets
binary search
,
data structures
,
graphs
,
shortest paths
1700
x4525
229A
Shifts
brute force
,
two pointers
1500
x3465
228E
The Road to Berland is Paved With Good Intentions
2-sat
,
dfs and similar
,
dsu
,
graphs
1900
x2374
228D
Zigzag
data structures
2100
x377
228C
Fractal Detector
dp
,
hashing
2000
x446
228B
Two Tables
brute force
,
implementation
1400
x3442
226E
Noble Knight's Path
data structures
,
trees
2900
x450
226D
The table
constructive algorithms
,
greedy
2100
x953
226C
Anniversary
data structures
,
implementation
,
math
,
matrices
,
number theory
2400
x850
226B
Naughty Stone Piles
greedy
1900
x1538
226A
Flying Saucer Segments
math
1400
x3926
225E
Unsolvable
math
,
number theory
2100
x786
225D
Snake
bitmasks
,
dfs and similar
,
graphs
,
implementation
2200
x917
225C
Barcode
dp
,
matrices
1700
x8862
225B
Well-known Numbers
binary search
,
greedy
,
number theory
1600
x3121
224B
Array
bitmasks
,
implementation
,
two pointers
1500
x7217
223E
Planar Graph
flows
,
geometry
,
graphs
3000
x191
223D
Spider
geometry
,
graphs
3000
x70
223C
Partial Sums
combinatorics
,
math
,
number theory
1900
x1517
223B
Two Strings
data structures
,
dp
,
strings
1900
x1740
223A
Bracket Sequence
data structures
,
expression parsing
,
implementation
1700
x2491
222E
Decoding Genome
dp
,
matrices
1900
x2607
222D
Olympiad
binary search
,
greedy
,
sortings
,
two pointers
1900
x2141
222C
Reducing Fractions
implementation
,
math
,
number theory
,
sortings
1800
x2120
220E
Little Elephant and Inversions
data structures
,
two pointers
2400
x1344
220D
Little Elephant and Triangle
geometry
,
math
2500
x277
220C
Little Elephant and Shifts
data structures
2100
x928
220B
Little Elephant and Array
constructive algorithms
,
data structures
1800
x9630
219E
Parking Lot
data structures
2200
x604
219D
Choosing Capital for Treeland
dfs and similar
,
dp
,
graphs
,
trees
1700
x8869
219C
Color Stripe
brute force
,
dp
,
greedy
1600
x6585
219B
Special Offer! Super Price 999 Bourles!
implementation
1400
x5748
217E
Alien DNA
data structures
,
dsu
,
trees
2800
x296
217D
Bitonix' Patrol
bitmasks
,
brute force
,
combinatorics
,
dfs and similar
,
math
2900
x246
217C
Formurosa
divide and conquer
,
dp
,
expression parsing
2600
x316
217B
Blackboard Fibonacci
brute force
,
math
2100
x872
216E
Martian Luck
math
,
number theory
2000
x557
216D
Spider's Web
binary search
,
sortings
,
two pointers
1700
x1334
216C
Hiring Staff
greedy
1800
x1810
216B
Forming Teams
dfs and similar
,
implementation
1700
x6190
215E
Periodical Numbers
combinatorics
,
dp
,
number theory
2100
x543
215D
Hot Days
greedy
1900
x1581
215C
Crosses
brute force
,
implementation
2100
x660
214B
Hometask
brute force
,
constructive algorithms
,
greedy
,
math
1600
x4920
213E
Two Permutations
data structures
,
hashing
,
strings
2700
x777
213D
Stars
constructive algorithms
,
geometry
2300
x335
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