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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
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Custom test
Problems
#
Name
252B
Unsorting Array
brute force
,
sortings
1800
x1721
252A
Little Xor
brute force
,
implementation
1100
x5329
251E
Tree and Table
dfs and similar
,
dp
,
implementation
,
trees
3000
x171
251D
Two Sets
bitmasks
,
math
2700
x479
251C
Number Transformation
dp
,
greedy
,
number theory
2000
x1036
251B
Playing with Permutations
implementation
,
math
1800
x1276
251A
Points on Line
binary search
,
combinatorics
,
two pointers
1300
x17895
250E
Mad Joe
brute force
2000
x467
250D
Building Bridge
geometry
,
ternary search
,
two pointers
1900
x895
250C
Movie Critics
greedy
1600
x1951
250B
Restoring IPv6
implementation
,
strings
1500
x1997
250A
Paper Work
greedy
1000
x4144
249E
Endless Matrix
math
2600
x320
249D
Donkey and Stars
data structures
,
dp
,
geometry
,
math
,
sortings
2700
x462
248E
Piglet's Birthday
dp
,
math
,
probabilities
2600
x584
248D
Sweets for Everyone!
binary search
,
greedy
,
implementation
2300
x500
248C
Robo-Footballer
binary search
,
geometry
2000
x855
248B
Chilly Willy
math
,
number theory
1400
x5346
248A
Cupboards
implementation
800
x22558
246E
Blood Cousins Return
binary search
,
data structures
,
dfs and similar
,
dp
,
sortings
2400
x3372
246D
Colorful Graph
brute force
,
dfs and similar
,
graphs
1600
x9487
246C
Beauty Pageant
brute force
,
constructive algorithms
,
greedy
1600
x2636
246B
Increase and Decrease
greedy
,
math
1300
x11359
246A
Buggy Sorting
constructive algorithms
,
greedy
,
sortings
900
x9310
245H
Queries for Number of Palindromes
dp
,
hashing
,
strings
1800
x6846
245G
Suggested Friends
brute force
,
graphs
2200
x438
245F
Log Stream Analysis
binary search
,
brute force
,
implementation
,
strings
2000
x878
245E
Mishap in Club
greedy
,
implementation
1400
x3297
245D
Restoring Table
constructive algorithms
,
greedy
1500
x2325
245C
Game with Coins
greedy
1700
x1552
245B
Internet Address
implementation
,
strings
1100
x5240
245A
System Administrator
implementation
800
x8497
244B
Undoubtedly Lucky Numbers
bitmasks
,
brute force
,
dfs and similar
1600
x4514
244A
Dividing Orange
implementation
900
x7964
243E
Matrix
data structures
3000
x192
243D
Cubes
data structures
,
dp
,
geometry
,
two pointers
2700
x215
243C
Colorado Potato Beetle
dfs and similar
,
implementation
2200
x530
243B
Hydra
graphs
,
sortings
2000
x1236
243A
The Brand New Function
bitmasks
1600
x3952
242E
XOR on Segment
bitmasks
,
data structures
2000
x9423
242D
Dispute
dfs and similar
,
graphs
,
greedy
2100
x1881
242C
King's Path
dfs and similar
,
graphs
,
hashing
,
shortest paths
1800
x8767
242B
Big Segment
implementation
,
sortings
1100
x15847
242A
Heads or Tails
brute force
,
implementation
1100
x6393
241G
Challenging Balloons
constructive algorithms
1900
x548
241F
Race
brute force
,
implementation
2300
x263
241E
Flights
graphs
,
shortest paths
2600
x1113
241D
Numbers
2900
x381
241C
Mirror Box
geometry
,
implementation
2000
x512
241B
Friends
binary search
,
bitmasks
,
data structures
,
math
2700
x818
241A
Old Peykan
greedy
1300
x2243
240F
TorCoder
data structures
2600
x1968
240E
Road Repairs
dfs and similar
,
graphs
,
greedy
2800
x357
239B
Easy Tape Programming
brute force
,
implementation
1500
x1374
239A
Two Bags of Potatoes
greedy
,
implementation
,
math
1200
x19030
238E
Meeting Her
dp
,
graphs
,
shortest paths
2600
x394
238D
Tape Programming
data structures
,
implementation
2900
x251
238C
World Eater Brothers
dfs and similar
,
dp
,
greedy
,
trees
2100
x1247
238B
Boring Partition
constructive algorithms
1800
x1333
238A
Not Wool Sequences
constructive algorithms
,
math
1300
x2048
237E
Build String
flows
,
graphs
2000
x1739
237D
T-decomposition
dfs and similar
,
graphs
,
greedy
,
trees
2000
x567
237C
Primes on Interval
binary search
,
number theory
,
two pointers
1600
x5840
237B
Young Table
implementation
,
sortings
1500
x2241
237A
Free Cash
implementation
1000
x26966
236B
Easy Number Challenge
implementation
,
number theory
1300
x14433
236A
Boy or Girl
brute force
,
implementation
,
strings
800
x215176
235E
Number Challenge
combinatorics
,
dp
,
implementation
,
math
,
number theory
2600
x779
235D
Graph Game
graphs
3000
x507
235C
Cyclical Quest
data structures
,
string suffix structures
,
strings
2700
x2148
235B
Let's Play Osu!
dp
,
math
,
probabilities
2000
x3591
235A
LCM Challenge
number theory
1600
x17967
234H
Merging Two Decks
constructive algorithms
,
greedy
2000
x568
234G
Practice
constructive algorithms
,
divide and conquer
,
implementation
1600
x1480
234F
Fence
dp
1800
x1749
234E
Champions' League
implementation
1600
x1002
234D
Cinema
implementation
1600
x1541
234C
Weather
dp
,
implementation
1300
x5565
234B
Reading
sortings
1000
x7135
234A
Lefthanders and Righthanders
implementation
1200
x4476
233B
Non-square Equation
binary search
,
brute force
,
math
1400
x7542
233A
Perfect Permutation
implementation
,
math
800
x42995
232E
Quick Tortoise
bitmasks
,
divide and conquer
,
dp
3000
x698
232D
Fence
binary search
,
data structures
,
string suffix structures
2900
x475
232C
Doe Graphs
constructive algorithms
,
divide and conquer
,
dp
,
graphs
,
shortest paths
2600
x291
232B
Table
bitmasks
,
combinatorics
,
dp
,
math
1900
x1479
232A
Cycles
binary search
,
constructive algorithms
,
graphs
,
greedy
1600
x2550
231E
Cactus
data structures
,
dfs and similar
,
dp
,
graphs
,
trees
2100
x1908
231D
Magic Box
brute force
,
geometry
1600
x4109
231C
To Add or Not to Add
binary search
,
sortings
,
two pointers
1600
x8685
231B
Magic, Wizardry and Wonders
constructive algorithms
,
greedy
1500
x3624
231A
Team
brute force
,
greedy
800
x332890
230B
T-primes
binary search
,
implementation
,
math
,
number theory
1300
x76717
230A
Dragons
greedy
,
sortings
1000
x80304
229E
Gifts
combinatorics
,
dp
,
math
,
probabilities
2600
x466
229D
Towers
dp
,
greedy
,
two pointers
2100
x2277
229C
Triangles
combinatorics
,
graphs
,
math
1900
x1630
229B
Planets
binary search
,
data structures
,
graphs
,
shortest paths
1700
x4726
229A
Shifts
brute force
,
two pointers
1500
x3529
228E
The Road to Berland is Paved With Good Intentions
2-sat
,
dfs and similar
,
dsu
,
graphs
1900
x2480
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