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Name
237C
Primes on Interval
binary search
,
number theory
,
two pointers
1600
x6646
237B
Young Table
implementation
,
sortings
1500
x2376
235E
Number Challenge
combinatorics
,
dp
,
implementation
,
math
,
number theory
2600
x886
235D
Graph Game
graphs
3000
x573
235C
Cyclical Quest
data structures
,
string suffix structures
,
strings
2700
x2470
235B
Let's Play Osu!
dp
,
math
,
probabilities
2000
x4306
235A
LCM Challenge
number theory
1600
x20979
234H
Merging Two Decks
constructive algorithms
,
greedy
2000
x619
234G
Practice
constructive algorithms
,
divide and conquer
,
implementation
1600
x1582
234F
Fence
dp
1800
x1970
234E
Champions' League
implementation
1600
x1050
234D
Cinema
implementation
1600
x1603
233B
Non-square Equation
binary search
,
brute force
,
math
1400
x8284
232E
Quick Tortoise
bitmasks
,
divide and conquer
,
dp
3000
x885
232D
Fence
binary search
,
data structures
,
string suffix structures
2900
x523
232C
Doe Graphs
constructive algorithms
,
divide and conquer
,
dp
,
graphs
,
shortest paths
2600
x309
232B
Table
bitmasks
,
combinatorics
,
dp
,
math
1900
x1679
232A
Cycles
binary search
,
constructive algorithms
,
graphs
,
greedy
1600
x2842
231E
Cactus
data structures
,
dfs and similar
,
dp
,
graphs
,
trees
2100
x2320
231D
Magic Box
brute force
,
geometry
1600
x4332
231C
To Add or Not to Add
binary search
,
sortings
,
two pointers
1600
x9698
231B
Magic, Wizardry and Wonders
constructive algorithms
,
greedy
1500
x3915
229E
Gifts
combinatorics
,
dp
,
math
,
probabilities
2600
x525
229D
Towers
dp
,
greedy
,
two pointers
2100
x2618
229C
Triangles
combinatorics
,
graphs
,
math
1900
x1783
229B
Planets
binary search
,
data structures
,
graphs
,
shortest paths
1700
x5785
229A
Shifts
brute force
,
two pointers
1500
x3754
228E
The Road to Berland is Paved With Good Intentions
2-sat
,
dfs and similar
,
dsu
,
graphs
1900
x2815
228D
Zigzag
data structures
2100
x438
228C
Fractal Detector
dp
,
hashing
2000
x549
228B
Two Tables
brute force
,
implementation
1400
x3636
226E
Noble Knight's Path
data structures
,
trees
2900
x548
226D
The table
constructive algorithms
,
greedy
2100
x1126
226C
Anniversary
data structures
,
implementation
,
math
,
matrices
,
number theory
2400
x1017
226B
Naughty Stone Piles
greedy
1900
x1708
226A
Flying Saucer Segments
math
1400
x4351
225E
Unsolvable
math
,
number theory
2100
x902
225D
Snake
bitmasks
,
dfs and similar
,
graphs
,
implementation
2200
x1049
225C
Barcode
dp
,
matrices
1700
x10165
225B
Well-known Numbers
binary search
,
greedy
,
number theory
1600
x3394
224B
Array
bitmasks
,
implementation
,
two pointers
1500
x7913
223E
Planar Graph
flows
,
geometry
,
graphs
3000
x208
223D
Spider
geometry
,
graphs
3000
x80
223C
Partial Sums
combinatorics
,
math
,
number theory
1900
x1755
223B
Two Strings
data structures
,
dp
,
strings
1900
x2032
223A
Bracket Sequence
data structures
,
expression parsing
,
implementation
1700
x2806
222E
Decoding Genome
dp
,
matrices
1900
x3567
222D
Olympiad
binary search
,
greedy
,
sortings
,
two pointers
1900
x2341
222C
Reducing Fractions
implementation
,
math
,
number theory
,
sortings
1800
x2926
220E
Little Elephant and Inversions
data structures
,
two pointers
2400
x1715
220D
Little Elephant and Triangle
geometry
,
math
2500
x314
220C
Little Elephant and Shifts
data structures
2100
x1037
220B
Little Elephant and Array
constructive algorithms
,
data structures
1800
x12876
219E
Parking Lot
data structures
2200
x697
219D
Choosing Capital for Treeland
dfs and similar
,
dp
,
graphs
,
trees
1700
x12484
219C
Color Stripe
brute force
,
dp
,
greedy
1600
x7157
219B
Special Offer! Super Price 999 Bourles!
implementation
1400
x6150
217E
Alien DNA
data structures
,
dsu
,
trees
2800
x354
217D
Bitonix' Patrol
bitmasks
,
brute force
,
combinatorics
,
dfs and similar
,
math
2900
x273
217C
Formurosa
divide and conquer
,
dp
,
expression parsing
2600
x368
217B
Blackboard Fibonacci
brute force
,
math
2100
x1093
216E
Martian Luck
math
,
number theory
2000
x667
216D
Spider's Web
binary search
,
sortings
,
two pointers
1700
x1499
216C
Hiring Staff
greedy
1800
x1927
216B
Forming Teams
dfs and similar
,
implementation
1700
x7026
215E
Periodical Numbers
combinatorics
,
dp
,
number theory
2100
x672
215D
Hot Days
greedy
1900
x1691
215C
Crosses
brute force
,
implementation
2100
x719
214B
Hometask
brute force
,
constructive algorithms
,
greedy
,
math
1600
x5352
213E
Two Permutations
data structures
,
hashing
,
strings
2700
x967
213D
Stars
constructive algorithms
,
geometry
2300
x363
213C
Relay Race
dp
2000
x3255
213B
Numbers
combinatorics
,
dp
1900
x1979
213A
Game
dfs and similar
,
greedy
1700
x1889
212E
IT Restaurants
dfs and similar
,
dp
,
trees
1500
x2196
212D
Cutting a Fence
binary search
,
data structures
,
dsu
2500
x614
212C
Cowboys
combinatorics
,
dp
,
math
2100
x486
212B
Polycarpus is Looking for Good Substrings
bitmasks
,
hashing
,
implementation
2300
x368
212A
Privatization
flows
,
graphs
3000
x229
209C
Trails and Glades
constructive algorithms
,
dsu
,
graphs
,
greedy
2400
x875
209B
Pixels
constructive algorithms
,
math
2100
x487
209A
Multicolored Marbles
dp
,
math
1600
x2846
208E
Blood Cousins
binary search
,
data structures
,
dfs and similar
,
trees
2100
x8917
208C
Police Station
dp
,
graphs
,
shortest paths
1900
x2151
208B
Solitaire
dfs and similar
,
dp
1900
x1497
207D9
The Beaver's Problem - 3
1800
x98
207D8
The Beaver's Problem - 3
2300
x100
207D7
The Beaver's Problem - 3
1600
x111
207D6
The Beaver's Problem - 3
2100
x88
207D5
The Beaver's Problem - 3
1600
x156
207D4
The Beaver's Problem - 3
2100
x173
207D3
The Beaver's Problem - 3
2000
x148
207D2
The Beaver's Problem - 3
2000
x117
207D10
The Beaver's Problem - 3
2100
x86
207D1
The Beaver's Problem - 3
1800
x124
207C3
Game with Two Trees
data structures
2700
x164
207C2
Game with Two Trees
2200
x105
207C1
Game with Two Trees
2100
x136
207B3
Military Trainings
1700
x214
207B2
Military Trainings
1900
x238
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Before contest
Codeforces Round 1097 (Div. 1, Based on Zhili Cup 2026)
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Codeforces Round 1097 (Div. 2, Based on Zhili Cup 2026)
24:17:06
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2-sat
binary search
bitmasks
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combinatorics
communication
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
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